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1

Multicentury Changes to the Global Climate and Carbon Cycle: Results from a Coupled Climate and Carbon Cycle Model  

Science Conference Proceedings (OSTI)

A coupled climate and carbon (CO2) cycle model is used to investigate the global climate and carbon cycle changes out to the year 2300 that would occur if CO2 emissions from all the currently estimated fossil fuel resources were released to the ...

G. Bala; K. Caldeira; A. Mirin; M. Wickett; C. Delire

2005-11-01T23:59:59.000Z

2

The Global Hydrological Cycle and Atmospheric Shortwave Absorption in Climate Models under CO2 Forcing  

Science Conference Proceedings (OSTI)

The spread among the predictions by climate models for the strengthening of the global hydrological cycle [i.e., the global mean surface latent heat flux (LH), or, equivalently, precipitation] at a given level of CO2-induced global warming is of ...

Ken Takahashi

2009-11-01T23:59:59.000Z

3

Natural Variability in a Stable, 1000-Yr Global Coupled Climate–Carbon Cycle Simulation  

Science Conference Proceedings (OSTI)

A new 3D global coupled carbon–climate model is presented in the framework of the Community Climate System Model (CSM-1.4). The biogeochemical module includes explicit land water–carbon coupling, dynamic carbon allocation to leaf, root, and wood, ...

Scott C. Doney; Keith Lindsay; Inez Fung; Jasmin John

2006-07-01T23:59:59.000Z

4

Monthly Mean Diurnal Cycles in Surface Temperatures over Land for Global Climate Studies  

Science Conference Proceedings (OSTI)

Monthly mean diurnal cycles (MDCs) of surface temperatures over land, represented in 3-h universal time intervals, have been analyzed. Satellite near-global data from the International Satellite Cloud Climatology Project (ISCCP) with a (280 km)2 ...

Alexander Ignatov; Garik Gutman

1999-07-01T23:59:59.000Z

5

Global Changes of the Water Cycle Intensity  

Science Conference Proceedings (OSTI)

In this study, numerical simulations of the twentieth-century climate are evaluated, focusing on the changes in the intensity of the global water cycle. A new model diagnostic of atmospheric water vapor cycling rate is developed and employed that ...

Michael G. Bosilovich; Siegfried D. Schubert; Gregory K. Walker

2005-05-01T23:59:59.000Z

6

Global Climate Change Links  

NLE Websites -- All DOE Office Websites (Extended Search)

Global Climate Change Links Global Climate Change Links This page provides links to web pages that we at CDIAC feel do a responsible job of presenting information and discussion pertinent to the science behind the global climate change ("global warming") debate. These sites include those on both sides of the debate; some asserting that global warming is a clear and present danger, and others that might be labeled global warming "skeptics." Some of these sites don't take a position per se; they exist to offer the public objective scientific information and results on our present understanding of the climate system. The list is not intended to be comprehensive, by any means. We hope it will be especially helpful for those who may be just beginning their research into global

7

Global Climate Change  

NLE Websites -- All DOE Office Websites (Extended Search)

When President Bush announced his Global Climate Change Initiative in February 2002, he committed the United States to a new strategy to cut greenhouse gas emissions over the next...

8

Global Climate Data  

NLE Websites -- All DOE Office Websites (Extended Search)

Data Data The climate data at the ORNL DAAC are used primarily as driving variables in terrestrial biogeochemistry models. These models typically use data on temperature (min,max), precipitation, humidity (relative humidity, vapor pressure deficit, dew point), radiation (PFD in PAR, shortwave, direct/diffuse, and UV radiation, daylength), and wind velocity. Climate / meteorology data are required at hourly to monthly time scales, either point or gridded, at spatial scales ranging from regional to continental to global. The ORNL DAAC currently distributes climate data from several related projects: VEMAP-1 Hydroclimatology, and Global Historical Climatology Network. We are also now distributing climate data developed at the East Anglia Climate Research Unit and the Potsdam Institute for Climate Research.

9

Terrestrial Carbon Cycle Dynamics under Recent and Future Climate Change  

Science Conference Proceedings (OSTI)

The behavior of the terrestrial carbon cycle under historical and future climate change is examined using the University of Victoria Earth System Climate Model, now coupled to a dynamic terrestrial vegetation and global carbon cycle model. When ...

H. Damon Matthews; Andrew J. Weaver; Katrin J. Meissner

2005-05-01T23:59:59.000Z

10

Development of Low Global Warming Potential Refrigerant Solutions for Commercial Refrigeration Systems using a Life Cycle Climate Performance Design Tool  

SciTech Connect

Commercial refrigeration systems are known to be prone to high leak rates and to consume large amounts of electricity. As such, direct emissions related to refrigerant leakage and indirect emissions resulting from primary energy consumption contribute greatly to their Life Cycle Climate Performance (LCCP). In this paper, an LCCP design tool is used to evaluate the performance of a typical commercial refrigeration system with alternative refrigerants and minor system modifications to provide lower Global Warming Potential (GWP) refrigerant solutions with improved LCCP compared to baseline systems. The LCCP design tool accounts for system performance, ambient temperature, and system load; system performance is evaluated using a validated vapor compression system simulation tool while ambient temperature and system load are devised from a widely used building energy modeling tool (EnergyPlus). The LCCP design tool also accounts for the change in hourly electricity emission rate to yield an accurate prediction of indirect emissions. The analysis shows that conventional commercial refrigeration system life cycle emissions are largely due to direct emissions associated with refrigerant leaks and that system efficiency plays a smaller role in the LCCP. However, as a transition occurs to low GWP refrigerants, the indirect emissions become more relevant. Low GWP refrigerants may not be suitable for drop-in replacements in conventional commercial refrigeration systems; however some mixtures may be introduced as transitional drop-in replacements. These transitional refrigerants have a significantly lower GWP than baseline refrigerants and as such, improved LCCP. The paper concludes with a brief discussion on the tradeoffs between refrigerant GWP, efficiency and capacity.

Abdelaziz, Omar [ORNL; Fricke, Brian A [ORNL; Vineyard, Edward Allan [ORNL

2012-01-01T23:59:59.000Z

11

Global climate feedbacks  

SciTech Connect

The important physical, chemical, and biological events that affect global climate change occur on a mesoscale -- requiring high spatial resolution for their analysis. The Department of Energy has formulated two major initiatives under the US Global Change Program: ARM (Atmospheric Radiation Measurements), and CHAMMP (Computer Hardware Advanced Mathematics and Model Physics). ARM is designed to use ground and air-craft based observations to document profiles of atmospheric composition, clouds, and radiative fluxes. With research and models of important physical processes, ARM will delineate the relationships between trace gases, aerosol and cloud structure, and radiative transfer in the atmosphere, and will improve the parameterization of global circulation models. The present GCMs do not model important feedbacks, including those from clouds, oceans, and land processes. The purpose of this workshop is to identify such potential feedbacks, to evaluate the uncertainties in the feedback processes (and, if possible, to parameterize the feedback processes so that they can be treated in a GCM), and to recommend research programs that will reduce the uncertainties in important feedback processes. Individual reports are processed separately for the data bases.

Manowitz, B.

1990-10-01T23:59:59.000Z

12

Study Climate and Global Change  

NLE Websites -- All DOE Office Websites (Extended Search)

What We Study How We Study Prepare The Nation For Change Assess the U.S. Climate Make Our Science Accessible Link Climate Change & Health Provide Data and Tools Coordinate Internationally Study Climate and Global Change Print E-mail Deforestation What is global change? "Global change" refers to changes in the global environment that may alter the capacity of the Earth to sustain life. This includes alterations in: Climate Land productivity Oceans or other water resources Atmospheric chemistry Ecological systems Demographic and socioeconomic trends What is global change research? According to the Global Change Research Act of 1990, "Global change research" refers to the study, monitoring, assessment, prediction, and information management activities used to describe and understand the:

13

Educational Global Climate Change Links  

NLE Websites -- All DOE Office Websites (Extended Search)

Educational Global Climate Change Links Educational Global Climate Change Links Evidence of the importance of global climate change to the future generation is reflected in the increasing number of queries CDIAC receives from students and educators, from a range of educational levels. We have compiled a listing of some sites that we hope will be of interest and of use to those looking for information, fun, ideas, and ways that they can make a difference. These links were chosen because we have found them useful in responding to those with inquiring minds. These links will take the user outside of CDIAC, and are by no means comprehensive. We are not responsible for the content or intent of these outside links. Tools you can use! NOAA's Global Climate Dashboard - The Global Climate Dashboard is

14

Global climate change and pedogenic carbonates  

SciTech Connect

Global Climate Change summarizes what is known about soil inorganic carbon and develops strategies that could lead to the retention of more carbon in the soil. It covers basic concepts, analytical methods, secondary carbonates, and research and development priorities. With this book one will get a better understanding of the global carbon cycle, organic and inorganic carbon, and their roles, or what is known of them, in the greenhouse effect.

Lal, R.; Kimble, J.M.; Stewart, B.A.; Eswaran, H. [eds.

1999-11-01T23:59:59.000Z

15

Global climate change: Implications, challenges and mitigation measures  

SciTech Connect

The present volume discusses topics in the fields of natural climatic fluctuations, the greenhouse effect, climate modeling, the biophysical and socioeconomic impacts of climate change, climate-change effect mitigation and adaptation strategies, and domestic (US) and international perspectives on regulation of climate-affecting activities. Attention is given to past climates as a guide to the future, the certainty of contemporary global warming, the physics of the greenhouse effect, the global carbon cycle, general circulation model studies of global warming, the implications of sea-level rise, forests' role in global climate change, the ecological effects of rapid climate change, predicted effects of climate change on agriculture, the impact of global warming on human health, energy supply technologies for reducing greenhouse gas emissions, and the U.N.'s 1992 Earth Summit Conference.

Majumdar, S.K.; Kalkstein, L.S.; Yarnal, B.M.; Miller, E.W.; Rosenfeld, L.M.

1992-01-01T23:59:59.000Z

16

A Prognostic Cloud Water Parameterization for Global Climate Models  

Science Conference Proceedings (OSTI)

An efficient new prognostic cloud water parameterization designed for use in global climate models is described. The scheme allows for life cycle effects in stratiform clouds and permits cloud optical properties to be determined interactively. ...

Anthony D. Del Genio; Mao-Sung Yao; William Kovari; Kenneth K-W. Lo

1996-02-01T23:59:59.000Z

17

Hydrological Cycle in the Danube basin in present-day and XXII century simulations by IPCCAR4 global climate models  

E-Print Network (OSTI)

We present an intercomparison and verification analysis of 20 GCMs included in the 4th IPCC assessment report regarding their representation of the hydrological cycle on the Danube river basin for 1961-2000 and for the 2161-2200 SRESA1B scenario runs. The basin-scale properties of the hydrological cycle are computed by spatially integrating the precipitation, evaporation, and runoff fields using the Voronoi-Thiessen tessellation formalism. The span of the model simulated mean annual water balances is of the same order of magnitude of the observed Danube discharge of the Delta; the true value is within the range simulated by the models. Some land components seem to have deficiencies since there are cases of violation of water conservation when annual means are considered. The overall performance and the degree of agreement of the GCMs are comparable to those of the RCMs analyzed in a previous work, in spite of the much higher resolution and common nesting of the RCMs. The reanalyses are shown to feature severa...

Lucarini, Valerio; Kriegerova, Ida; Speranza, Antonio; 10.1029/2007JD009167

2011-01-01T23:59:59.000Z

18

Global Climate Change Alliance Training Workshops on Mainstreaming Climate  

Open Energy Info (EERE)

Global Climate Change Alliance Training Workshops on Mainstreaming Climate Global Climate Change Alliance Training Workshops on Mainstreaming Climate Change Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Global Climate Change Alliance Training Workshop on Mainstreaming Climate Change Agency/Company /Organization: Global Climate Change Alliance (GCCA) Sector: Climate Topics: Low emission development planning, -LEDS Resource Type: Training materials, Workshop Website: www.gcca.eu/pages/75_2-OCT-Workshop.html Cost: Free References: GCCA Countries Training Workshop[1] A GCCA workshop for OCT countries took place 27-28 January 2012 immediately following the OCT-EU Forum meeting in Brussels, Belgium. The workshop aimed at sharing views, knowledge, tools and experiences on climate change mitigation and adaptation and at raising awareness on the benefits and

19

Terrestrial carbon cycle dynamics under recent and future climate change  

E-Print Network (OSTI)

The behavior of the terrestrial carbon cycle under historical and future climate change is examined using the University of Victoria Earth System Climate Model, now coupled to a dynamic terrestrial vegetation and global carbon cycle model. When forced by historical emissions of CO 2 from fossil fuels and land-use change, the coupled climate–carbon cycle model accurately reproduces historical atmospheric CO 2 trends, as well as terrestrial and oceanic uptake for the past two decades. Under six twenty-first-century CO 2 emissions scenarios, both terrestrial and oceanic carbon sinks continue to increase, though terrestrial uptake slows in the latter half of the century. Climate–carbon cycle feedbacks are isolated by comparing a coupled model run with a run where climate and the carbon cycle are uncoupled. The modeled positive feedback between the carbon cycle and climate is found to be relatively small, resulting in an increase in simulated CO 2 of 60 ppmv at the year 2100. Including non-CO 2 greenhouse gas forcing and increasing the model’s climate sensitivity increase the effect of this feedback to 140 ppmv. The UVic model does not, however, simulate a switch from a terrestrial carbon sink to a source during the twenty-first century, as earlier studies have suggested. This can be explained by a lack of substantial reductions in simulated vegetation productivity due to climate changes. 1.

H. Damon Matthews; Andrew J. Weaver; Katrin; J. Meissner

2005-01-01T23:59:59.000Z

20

Global Climate Change Alliance Training Workshops on Mainstreaming...  

Open Energy Info (EERE)

Global Climate Change Alliance Training Workshops on Mainstreaming Climate Change Jump to: navigation, search Tool Summary Name: Global Climate Change Alliance Training Workshop on...

Note: This page contains sample records for the topic "global climate cycle" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Modeling Potential Equilibrium States of Vegetation and Terrestrial Water Cycle of Mesoamerica under Climate Change Scenarios  

Science Conference Proceedings (OSTI)

The likelihood and magnitude of the impacts of climate change on potential vegetation and the water cycle in Mesoamerica is evaluated. Mesoamerica is a global biodiversity hotspot with highly diverse topographic and climatic conditions and is ...

Pablo Imbach; Luis Molina; Bruno Locatelli; Olivier Roupsard; Gil Mahé; Ronald Neilson; Lenin Corrales; Marko Scholze; Philippe Ciais

2012-04-01T23:59:59.000Z

22

Energy Crossroads: Global Climate Change | Environmental Energy  

NLE Websites -- All DOE Office Websites (Extended Search)

Global Climate Change Global Climate Change Suggest a Listing Best Global Warming Articles Global Warming Articles provides facts about the causes, effects and answers to global warming; the environment; energy conservation, climate change and more. Ecolytics As emissions requirements, climate change, financial markets, and risk management become increasingly interconnected, organizations are left with critical choices regarding greenhouse gas (GHG) emissions management. Ecolytics(tm), a comprehensive web-based software tool, can help organizations in the navigation of this complex area by providing an effective cataloging, strategic planning, economic analysis, and risk management solution. Enviro$en$e Funded by the Environmental Protection Agency and the Strategic

23

Global Climate & Energy ProjectGlobal & Energy Project STANFORD UNIVERSITY  

E-Print Network (OSTI)

from plants and animals to energy, and to determine the best conditions for doing so (see below). #12, and processes may have an enormous impact on the world's future energy consumption and environment. In orderGlobal Climate & Energy ProjectGlobal & Energy Project STANFORD UNIVERSITY Global Energy Climate

Nur, Amos

24

A Multinational Course on Global Climate Change  

Science Conference Proceedings (OSTI)

A novel multinational course on global climate change was developed by East Carolina University in collaboration with five international universities and the U.S. Department of State. This course was developed to help foster the global conversation needed ...

Rosana Nieto Ferreira; Andrew Herdman; Scott Curtis; Rosina Chia; Elmer Poe; Robert Thompson; Biwu Yang

2012-10-01T23:59:59.000Z

25

Global hydrological cycle response to rapid and slow global warming  

Science Conference Proceedings (OSTI)

We analyze the response of global water vapor to global warming in a series of fully coupled climate model simulations. We find that a roughly 7% per Kelvin rate of increase of water vapor with global surface temperature is robust only for rapid ...

Larissa Back; Karen Russ; Zhengyu Liu; Kuniaki Inoue; Jiaxu Zhang; Bette Otto-Bliesner

26

Global climate change and international security  

Science Conference Proceedings (OSTI)

On May 8--10, 1991, the Midwest Consortium of International Security Studies (MCISS) and Argonne National Laboratory cosponsored a conference on Global Climate Change and International Security. The aim was to bring together natural and social scientists to examine the economic, sociopolitical, and security implications of the climate changes predicted by the general circulation models developed by natural scientists. Five themes emerged from the papers and discussions: (1) general circulation models and predicted climate change; (2) the effects of climate change on agriculture, especially in the Third World; (3) economic implications of policies to reduce greenhouse gas emissions; (4) the sociopolitical consequences of climate change; and (5) the effect of climate change on global security.

Rice, M.

1991-01-01T23:59:59.000Z

27

Recent Global Climate Change-Related News and Publications  

NLE Websites -- All DOE Office Websites (Extended Search)

Recent Global Climate Change-Related News and Publications Recent Global Climate Change-Related News and Publications A sampling of what CDIAC staff members have been following: Extreme summer weather in northern mid-latitudes linked to a vanishing cryosphere. Tang, Q., X. Zhang, and J.A. Francis, 2013, Nature Climate Change DOI: 10.1038/nclimate2065. Uncertainty in annual aankings from NOAA's global temperature time series. Arguez A., T.R. Karl, M.F. Squires, and R.S. Vose, 2013, Geophysical Research Letters DOI: 10.1002/2013GL057999. Climate extremes and the carbon cycle. Reichstein, M., et al.., 2013, Nature DOI: 10.1038/nature12350. Anatomy of an extreme event. Hoerling, M., et al., 2013, J. Climate DOI: 10.1175/JCLI-D-12-00270.1. Australia's unique influence on global sea level in 2010-2011. Fasullo, J.T., C. Boening, F.W. Landerer, and R.S. Nerem, 2013, Geophysical

28

Orogenic Propagating Precipitation Systems over the United States in a Global Climate Model with Embedded Explicit Convection  

Science Conference Proceedings (OSTI)

In the lee of major mountain chains worldwide, diurnal physics of organized propagating convection project onto seasonal and climate time scales of the hydrologic cycle, but this phenomenon is not represented in conventional global climate models (...

Michael S. Pritchard; Mitchell W. Moncrieff; Richard C. J. Somerville

2011-08-01T23:59:59.000Z

29

NPP and the Global Carbon Cycle  

NLE Websites -- All DOE Office Websites (Extended Search)

the Global Carbon Cycle the Global Carbon Cycle Introduction Photosynthetic carbon fixation comprises a major component of the global carbon cycle. Data on net primary productivity (NPP) may be sparse, but a consistent NPP data set may be used to calibrate, parameterize and evaluate models of terrestrial carbon cycling, as well as for validation of remote sensing data and other applications (identifying trends, investigating biogeochemical processes, etc.). It is also useful to place such data within the context of carbon cycling and carbon storage worldwide. For example: How much carbon exists in the biosphere, and where exactly is it stored? How much is in fossil fuels (coal, oil, gas), and how large are current fossil-fuel emissions? How much is in living biomass (plants/ animals/ humans)?

30

Policy options for stabilizing global climate  

SciTech Connect

The structure of this paper is designed to answer the following questions in turn: What is the greenhouse effect What evidence i there that the greenhouse effect is increasing How will the Earth's climate respond to changes in greenhouse gas concentrations What activities are responsible for the greenhouse gas emissions How might emissions and climate change in the future What technologies are available for limiting greenhouse gas emissions And what domestic and international policy options, if implemented, would help to stabilize global climate This chapter provides a general introduction to the climate change issue and reviews selected previous studies. Chapter II discusses the greenhouse gases, their sources and sinks, chemical properties, current atmospheric concentrations and distributions, and related uncertainties. Chapter III relates the greenhouse gases to the process of climatic change. Once this link is made, Chapter IV examines those human activities that affect trace-gas emissions and ultimately influence climate change. Chapter V discusses the scenarios developed for this report to assist us in thinking about possible future emissions and climate change. Chapter VI then presents sensitivity analyses of the modeling results. Chapter VII gives a detailed description of existing and emerging technologies that should be considered in the formation of a comprehensive strategy for mitigating global warming. Chapter VIII outlines domestic policy options, and the concluding chapter (Chapter IX) discusses international mechanisms for responding to climate change.

Lashof, D.A.; Tirpak, D.A.

1990-01-01T23:59:59.000Z

31

Transferability Intercomparison: An Opportunity for New Insight on the Global Water Cycle and Energy Budget  

Science Conference Proceedings (OSTI)

A new approach, called transferability intercomparisons, is described for advancing both understanding and modeling of the global water cycle and energy budget. Under this approach, individual regional climate models perform simulations with all ...

E. S. Takle; W. J. Gutowski Jr.; R. W. Arritt; J. Roads; I. Meinke; B. Rockel; C. G. Jones; A. Zadra

2007-03-01T23:59:59.000Z

32

Arctic Methane, Hydrates, and Global Climate  

NLE Websites -- All DOE Office Websites (Extended Search)

Arctic Methane, Hydrates, and Global Climate Arctic Methane, Hydrates, and Global Climate Speaker(s): Matthew T. Reagan Date: March 17, 2010 - 12:00pm Location: 90-3122 Paleooceanographic evidence has been used to postulate that methane may have had a significant role in regulating past climate. However, the behavior of contemporary permafrost deposits and oceanic methane hydrate deposits subjected to rapid temperature changes, like those now occurring in the arctic and those predicted under future climate change scenarios, has only recently been investigated. A recent expedition to the west coast of Spitsbergen discovered substantial methane gas plumes exiting the seafloor at depths that correspond to the upper limit of the receding gas hydrate stability zone. It has been suggested that these plumes may be the

33

Global Climate Data, Sept. 18, 2000  

NLE Websites -- All DOE Office Websites (Extended Search)

Climate Data Climate Data The ORNL DAAC announces the addition of "Global Monthly Climatology for the Twentieth Century (New et al.)" to its collection of climate data. The newest addition contains gridded data related to monthly surface climate over global land areas at 0.5-degree resolution. Precipitation, mean temperature, and diurnal temperature range are interpolated directly from station time-series. Wet-day frequency, vapor pressure, cloud cover, and ground-frost frequency are interpolated where data are available and estimated for regions with no data. Data can be accessed through an on-line interface that allows users to select the data by parameter and years. By agreement with the data provider, users who wish to request the complete 400-megabyte data set on a

34

Impact of Geoengineering Schemes on the Global Hydrological Cycle  

SciTech Connect

The rapidly rising CO{sub 2} level in the atmosphere has led to proposals of climate stabilization via 'Geoengineering' schemes that would mitigate climate change by intentionally reducing the solar radiation incident on earth's surface. In this paper, we address the impact of these climate stabilization schemes on the global hydrological cycle, using equilibrium simulations from an atmospheric general circulation model coupled to a slab ocean model. We show that insolation reductions sufficient to offset global-scale temperature increases lead to a decrease in the intensity of the global hydrologic cycle. This occurs because solar forcing is more effective in driving changes in global mean evaporation than is CO{sub 2} forcing of a similar magnitude. In the model used here, the hydrologic sensitivity, defined as the percentage change in global mean precipitation per degree warming, is 2.4% for solar forcing, but only 1.5% for CO{sub 2} forcing. Although other models and the climate system itself may differ quantitatively from this result, the conclusion can be understood based on simple considerations of the surface energy budget and thus is likely to be robust. Compared to changing temperature by altering greenhouse gas concentrations, changing temperature by varying insolation results in larger changes in net radiative fluxes at the surface; these are compensated by larger changes in latent and sensible heat fluxes. Hence the hydrological cycle is more sensitive to temperature adjustment via changes in insolation than changes in greenhouse gases. This implies that an alteration in solar forcing might offset temperature changes or hydrological changes from greenhouse warming, but could not cancel both at once.

Bala, G; Duffy, P; Taylor, K

2007-12-07T23:59:59.000Z

35

Delayed Seasonal Cycle and African Monsoon in a Warmer Climate  

E-Print Network (OSTI)

Increasing greenhouse gases will change many aspects of the Earth's climate, from its annual mean to the frequency of extremes such as heat waves and droughts. Here we report that the current generation of climate models predicts a delay in the seasonal cycle of global rainfall and ocean temperature in response to increasing greenhouse gases, with important implications for the regional monsoons. In particular, the rainy season of the semi-arid African Sahel is projected to start later and become shorter: an undesirable change for local rainfed agriculture and pastoralism. Previous work has highlighted the uncertainty in this region's response to anthropogenic global warming: summer rainfall is predicted either to decrease or increase by up to 30% depending which model is used. The robust agreement across models on the seasonal distribution of rainfall changes signifies that the onset date and length of the rainy season should be more predictable than annual mean anomalies.

Biasutti, Michela

2009-01-01T23:59:59.000Z

36

Global fish production and climate change  

Science Conference Proceedings (OSTI)

Current global fisheries production of {approx}160 million tons is rising as a result of increases in aquaculture production. A number of climate-related threats to both capture fisheries and aquaculture are identified, but there is low confidence in predictions of future fisheries production because of uncertainty over future global aquatic net primary production and the transfer of this production through the food chain to human consumption. Recent changes in the distribution and productivity of a number of fish species can be ascribed with high confidence to regional climate variability, such as the El Nino-Southern Oscillation. Future production may increase in some high-latitude regions because of warming and decreased ice cover, but the dynamics in low-latitude regions are giverned by different processes, and production may decline as a result of reduced vertical mixing of the water column and, hence, reduced recycling of nutrients. There are strong interactions between the effects of fishing and the effects of climate because fishing reduces the age, size, and geographic diversity of populations and the biodiversity of marine ecosystems, making both more sensitive to additional stresses such as climate change. Inland fisheries are additionally threatened by changes in precipiation and water management. The frequency and intensity of extreme climate events is likely to have a major impact on future fisheries production in both inland and marine systems. Reducing fishing mortality in the majority of fisheries, which are currently fully exploited or overexploited, is the pricipal feasible means of reducing the impacts of climate change.

Brander, K.M. [International Council for the Exploration of the Sea, Copenhagen (Denmark)

2007-12-11T23:59:59.000Z

37

Global Climate Change Impacts & Activities  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Shop Floor to Top Floor: Best Business Shop Floor to Top Floor: Best Business Practices in Energy Efficiency From Shop Floor to Top Floor: Best Business Practices in Energy Efficiency Andre de Fontaine Pew Center on Global Climate Change DOE ITP Webinar April 1, 2010 Andre de Fontaine Pew Center on Global Climate Change DOE ITP Webinar April 1, 2010 Introduction to Pew Center Introduction to Pew Center * Established in 1998 as an independent, non- partisan climate organization * Three-fold structure - a "do" tank: - Research - 100+ reports over 10 years - Actively advise on policy - state, federal, international - Business Environmental Leadership Council (BELC) o 46 companies o $2 trillion in revenues o Nearly 4 million employees Introduction to BELC Introduction to BELC 3 Efficiency Project Overview

38

Estimates of the Global Water Budget and Its Annual Cycle Using Observational and Model Data  

Science Conference Proceedings (OSTI)

A brief review is given of research in the Climate Analysis Section at NCAR on the water cycle. Results are used to provide a new estimate of the global hydrological cycle for long-term annual means that includes estimates of the main reservoirs ...

Kevin E. Trenberth; Lesley Smith; Taotao Qian; Aiguo Dai; John Fasullo

2007-08-01T23:59:59.000Z

39

Global climate change and infectious diseases  

Science Conference Proceedings (OSTI)

The effects of global climate change on infectious diseases are hypothetical until more is known about the degree of change in temperature and humidity that will occur. Diseases most likely to increase in their distribution and severity have three-factor (agent, vector, and human being) and four-factor (plus vertebrate reservoir host) ecology. Aedes aegypti and Aedes albopictus mosquitoes may move northward and have more rapid metamorphosis with global warming. These mosquitoes transmit dengue virus, and Aedes aegypti transmits yellow fever virus. The faster metamorphosis and a shorter extrinsic incubation of dengue and yellow fever viruses could lead to epidemics in North America. Vibrio cholera is harbored persistently in the estuaries of the U.S. Gulf Coast. Over the past 200 years, cholera has become pandemic seven times with spread from Asia to Europe, Africa, and North America. Global warming may lead to changes in water ecology that could enhance similar spread of cholera in North America. Some other infectious diseases such as LaCrosse encephalitis and Lyme disease are caused by agents closely dependent on the integrity of their environment. These diseases may become less prominent with global warming because of anticipated modification of their habitats. Ecological studies will help as to understand more fully the possible consequences of global warming. New and more effective methods for control of vectors will be needed. 12 refs., 1 tab.

Shope, R. (Yale Univ. School of Medicine, New Haven, CT (United States))

1991-12-01T23:59:59.000Z

40

Damage of Land Biosphere due to Intense Warming by 1000-Fold Rapid Increase in Atmospheric Methane: Estimation with a Climate–Carbon Cycle Model  

Science Conference Proceedings (OSTI)

Decadal-time-scale responses of climate and the global carbon cycle to warming associated with rapid increases in atmospheric methane from a massive methane release from marine sedimentary methane hydrates are investigated with a coupled climate–...

Atsushi Obata; Kiyotaka Shibata

2012-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "global climate cycle" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Climate-Carbon Cycle Interactions Dr. John P. Krasting  

NLE Websites -- All DOE Office Websites (Extended Search)

Ensemble Modeling of Climate-Carbon Cycle Interactions Dr. John P. Krasting geophysical fluid dynamics Laboratory Wednesday, Jan 23, 2013 - 4:15PM MBG AUDITORIUM Refreshments at...

42

Consequences of Considering Carbon–Nitrogen Interactions on the Feedbacks between Climate and the Terrestrial Carbon Cycle  

Science Conference Proceedings (OSTI)

The impact of carbon–nitrogen dynamics in terrestrial ecosystems on the interaction between the carbon cycle and climate is studied using an earth system model of intermediate complexity, the MIT Integrated Global Systems Model (IGSM). Numerical ...

Andrei P. Sokolov; David W. Kicklighter; Jerry M. Melillo; Benjamin S. Felzer; C. Adam Schlosser; Timothy W. Cronin

2008-08-01T23:59:59.000Z

43

Global Framework for Climate Risk Exposure | Open Energy Information  

Open Energy Info (EERE)

Framework for Climate Risk Exposure Framework for Climate Risk Exposure Jump to: navigation, search Tool Summary Name: Global Framework for Climate Risk Exposure Agency/Company /Organization: United Nations Environment Programme Topics: Finance, Co-benefits assessment, Market analysis Resource Type: Publications, Guide/manual Website: www.unepfi.org/fileadmin/documents/global_framework.pdf Global Framework for Climate Risk Exposure Screenshot References: Global Framework for Climate Risk Exposure[1] Summary "A group of leading institutional investors from around the world released the Global Framework for Climate Risk Disclosure-a new statement on disclosure that investors expect from companies-in October 2006. Investors require this information in order to analyze a company's business risks and opportunities resulting from climate change, as well as

44

Global Climate Change: Risk to Bank Loans | Open Energy Information  

Open Energy Info (EERE)

Climate Change: Risk to Bank Loans Climate Change: Risk to Bank Loans Jump to: navigation, search Tool Summary Name: Global Climate Change: Risk to Bank Loans Agency/Company /Organization: United Nations Environment Programme Topics: Finance, Co-benefits assessment, Market analysis Resource Type: Publications, Guide/manual Website: www.unepfi.org/fileadmin/documents/global_climate_change_risk.pdf Global Climate Change: Risk to Bank Loans Screenshot References: Global Climate Change: Risk to Bank Loans[1] Summary "The purpose of this study is to evaluate the impact of climate change related risks on bank borrowers, utilizing as much data and analysis as possible. The first section of this report reviews the current climate change policies in place in Canada, Europe, and the US, in order to provide

45

Global Modeling of the Contrail and Contrail Cirrus Climate Impact  

Science Conference Proceedings (OSTI)

Despite considerable technological advances, aviation impacts on global climate are significant and may constitute a future constraint on the continued growth of air travel. The most important but least understood component in aviation climate ...

Ulrike Burkhardt; Bernd Kärcher; Ulrich Schumann

2010-04-01T23:59:59.000Z

46

White House Conference on Global Climate Change  

SciTech Connect

President Clinton has directed the White House office on Environmental Policy to coordinate an interagency process to develop a plan to fulfill the commitment he made in his Earth Day address on April 21, 1993. This plan will become the cornerstone of the Climate Change Plan that will be completed shortly after the Rio Accord enters into force. The Office on Environmental Policy established the Interagency Climate Change Mitigation Group to draw on the expertise of federal agencies including the National Economic Council; the Council of Economic Advisors; the Office of Science and Technology Policy; the Office of Management and Budget; the National Security Council; the Domestic Policy Council; the Environmental Protection Agency; and the Departments of Energy, Transportation, Agriculture, Interior, Treasury, Commerce, and State. Working groups have been established to examine six key policy areas: energy demand, energy supply, joint implementation, methane and other gases, sinks, and transportation. The purpose of the White House Conference on Global Climate Change was to ``tap the real-world experiences`` of diverse participants and seek ideas and information for meeting the President`s goals. During the opening session, senior administration officials defined the challenge ahead and encouraged open and frank conversation about the best possible ways to meet it.

Not Available

1993-11-01T23:59:59.000Z

47

U.S. Global Change Research Program publishes "National Climate...  

Open Energy Info (EERE)

U.S. Global Change Research Program publishes "National Climate Assessment" report for United States Home > Groups > OpenEI Community Central Graham7781's picture Submitted by...

48

Improved Offshore Wind Resource Assessment in Global Climate...  

NLE Websites -- All DOE Office Websites (Extended Search)

Alliance for Sustainable Energy, LLC. Contract No. DE-AC36-08GO28308 Improved Offshore Wind Resource Assessment in Global Climate Stabilization Scenarios Douglas Arent National...

49

Validation of Global Weather Forecast and Climate Models Over...  

NLE Websites -- All DOE Office Websites (Extended Search)

Validation of Global Weather Forecast and Climate Models Over the North Slope of Alaska Xie, Shaocheng Lawrence Livermore National Laboratory Klein, Stephen Lawrence Livermore...

50

Posters Cloud Parameterizations in Global Climate Models: The...  

NLE Websites -- All DOE Office Websites (Extended Search)

3 Posters Cloud Parameterizations in Global Climate Models: The Role of Aerosols J. E. Penner and C. C. Chuang Lawrence Livermore National Laboratory Livermore, California...

51

Financing a Global Deal on Climate Change | Open Energy Information  

Open Energy Info (EERE)

Financing a Global Deal on Climate Change Financing a Global Deal on Climate Change Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Financing a Global Deal on Climate Change Agency/Company /Organization: United Nations Environment Programme Topics: Finance, Co-benefits assessment Resource Type: Guide/manual Website: www.unepfi.org/fileadmin/documents/FinancingGlobalDeal.pdf References: Financing a Global Deal for Climate Change [1] Summary "This Green Paper builds on this experience and focuses on the priorities identified by UNEP FI to mobilise the skills and resources of the banking, investment and insurance sectors behind an effective, efficient and equitable global deal on climate change at COP15 in Copenhagen. The Paper addresses the types of decisions that governments could take in Copenhagen

52

Effects of solar UV radiation and climate change on biogeochemical cycling: Interactions and feedbacks  

SciTech Connect

Solar UV radiation, climate and other drivers of global change are undergoing significant changes and models forecast that these changes will continue for the remainder of this century. Here we assess the effects of solar UV radiation on biogeochemical cycles and the interactions of these effects with climate change, including feedbacks on climate. Such interactions occur in both terrestrial and aquatic ecosystems. While there is significant uncertainty in the quantification of these effects, they could accelerate the rate of atmospheric CO{sub 2} increase and subsequent climate change beyond current predictions. The effects of predicted changes in climate and solar UV radiation on carbon cycling in terrestrial and aquatic ecosystems are expected to vary significantly between regions. The balance of positive and negative effects on terrestrial carbon cycling remains uncertain, but the interactions between UV radiation and climate change are likely to contribute to decreasing sink strength in many oceanic regions. Interactions between climate and solar UV radiation will affect cycling of elements other than carbon, and so will influence the concentration of greenhouse and ozone-depleting gases. For example, increases in oxygen-deficient regions of the ocean caused by climate change are projected to enhance the emissions of nitrous oxide, an important greenhouse and ozone-depleting gas. Future changes in UV-induced transformations of aquatic and terrestrial contaminants could have both beneficial and adverse effects. Taken in total, it is clear that the future changes in UV radiation coupled with human-caused global change will have large impacts on biogeochemical cycles at local, regional and global scales.

Erickson III, David J [ORNL

2011-01-01T23:59:59.000Z

53

Combined Climate and Carbon-Cycle Effects of Large-Scale Deforestation  

DOE Green Energy (OSTI)

The prevention of deforestation and promotion of afforestation have often been cited as strategies to slow global warming. Deforestation releases CO{sub 2} to the atmosphere, which exerts a warming influence on Earth's climate. However, biophysical effects of deforestation, which include changes in land surface albedo, evapotranspiration, and cloud cover also affect climate. Here we present results from several large-scale deforestation experiments performed with a three-dimensional coupled global carbon-cycle and climate model. These are the first such simulations performed using a fully three-dimensional model representing physical and biogeochemical interactions among land, atmosphere, and ocean. We find that global-scale deforestation has a net cooling influence on Earth's climate, since the warming carbon-cycle effects of deforestation are overwhelmed by the net cooling associated with changes in albedo and evapotranspiration. Latitude-specific deforestation experiments indicate that afforestation projects in the tropics would be clearly beneficial in mitigating global-scale warming, but would be counterproductive if implemented at high latitudes and would offer only marginal benefits in temperate regions. While these results question the efficacy of mid- and high-latitude afforestation projects for climate mitigation, forests remain environmentally valuable resources for many reasons unrelated to climate.

Bala, G; Caldeira, K; Wickett, M; Phillips, T J; Lobell, D B; Delire, C; Mirin, A

2006-10-17T23:59:59.000Z

54

The oceanic cycle and global atmospheric budget of carbonyl sulfide  

SciTech Connect

A significant portion of stratospheric air chemistry is influenced by the existence of carbonyl sulfide (COS). This ubiquitous sulfur gas represents a major source of sulfur to the stratosphere where it is converted to sulfuric acid aerosol particles. Stratospheric aerosols are climatically important because they scatter incoming solar radiation back to space and are able to increase the catalytic destruction of ozone through gas phase reactions on particle surfaces. COS is primarily formed at the surface of the earth, in both marine and terrestrial environments, and is strongly linked to natural biological processes. However, many gaps in the understanding of the global COS cycle still exist, which has led to a global atmospheric budget that is out of balance by a factor of two or more, and a lack of understanding of how human activity has affected the cycling of this gas. The goal of this study was to focus on COS in the marine environment by investigating production/destruction mechanisms and recalculating the ocean-atmosphere flux.

Weiss, P.S.

1994-12-31T23:59:59.000Z

55

Climate  

NLE Websites -- All DOE Office Websites (Extended Search)

Climate simulation map Climate Global climate change processes and impacts research in EETD is aimed at understanding the factors-and the feedbacks among these factors-driving...

56

Tropical Climate Regimes and Global Climate Sensitivity in a Simple Setting  

Science Conference Proceedings (OSTI)

Multiple tropical climate regimes are found in an atmospheric general circulation model (AGCM) coupled to a global slab ocean when the model is forced by different values of globally uniform insolation. Even in this simple setting, convection ...

Joseph Barsugli; Sang-Ik Shin; Prashant D. Sardeshmukh

2005-04-01T23:59:59.000Z

57

WATCH: Current Knowledge of the Terrestrial Global Water Cycle  

Science Conference Proceedings (OSTI)

Water-related impacts are among the most important consequences of increasing greenhouse gas concentrations. Changes in the global water cycle will also impact the carbon and nutrient cycles and vegetation patterns. There is already some evidence ...

Richard Harding; Martin Best; Eleanor Blyth; Stefan Hagemann; Pavel Kabat; Lena M. Tallaksen; Tanya Warnaars; David Wiberg; Graham P. Weedon; Henny van Lanen; Fulco Ludwig; Ingjerd Haddeland

2011-12-01T23:59:59.000Z

58

Sustainable biochar to mitigate global climate change  

Science Conference Proceedings (OSTI)

Production of biochar (the carbon-rich solid formed by pyrolysis of biomass), in combination with its storage in soils, has been suggested as a means to abate anthropogenic climate change, while simultaneously increasing crop yields. The climate mitigation potential stems primarily from the highly recalcitrant nature of biochar, which slows the rate at which photosynthetically fixed carbon is returned to the atmosphere. Significant uncertainties exist, however, regarding the impact, capacity, and sustainability of biochar for carbon capture and storage when scaled to the global level. Previous estimates, based on simple assumptions, vary widely. Here we show that, subject to strict environmental and modest economic constraints on biomass procurement and biochar production methods, annual net emissions of CO2, CH4 and N2O could be reduced by 1.1 - 1.9 Pg CO2-C equivalent (CO2-Ce)/yr (7 - 13% of current anthropogenic CO2-Ce emissions; 1Pg = 1 Gt). Over one century, cumulative net emissions of these gases could be reduced by 72-140 Pg CO2-Ce. The lower end of this range uses currently untapped residues and wastes; the upper end requires substantial alteration to global biomass management, but would not endanger food security, habitat or soil conservation. Half the avoided emissions are due to the net C sequestered as biochar, one-quarter to replacement of fossil-fuel energy by pyrolysis energy, and one-quarter to avoided emissions of CH4 and N2O. The total mitigation potential is 18-30% greater than if the same biomass were combusted to produce energy. Despite limited data for the decomposition rate of biochar in soils and the effects of biochar additions on soil greenhouse-gas fluxes, sensitivity within realistic ranges of these parameters is small, resulting in an uncertainty of ±8% (±1 s.d.) in our estimates. Achieving these mitigation results requires, however, that biochar production be performed using only low-emissions technologies and feedstocks obtained sustainably, with minimal carbon debt incurred from land-use change.

Woolf, Dominic; Amonette, James E.; Street-Perrott, F. A.; Lehmann, Johannes C.; Joseph, Stephen

2010-08-10T23:59:59.000Z

59

Global Primary Aluminium Industry 2010 Life Cycle Inventory  

Science Conference Proceedings (OSTI)

Within this framework, the Primary Aluminium Industry has established a global Life Cycle Inventory (LCI) data set. Inventory flows include inputs of raw materials  ...

60

Regionalized Global Energy Scenarios Meeting Stringent Climate Targets  

E-Print Network (OSTI)

to generate the energy supply mix that would meet given energy demands at lowest cost, assuming strongRegionalized Global Energy Scenarios Meeting Stringent Climate Targets ­ cost effective fuel in the energy system it is less costly to reduce CO2-emissions #12;Global energy system model #12;Global energy

Note: This page contains sample records for the topic "global climate cycle" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Moisture Flux Convergence in Regional and Global Climate Models: Implications for Droughts in the Southwestern United States Under Climate Change  

SciTech Connect

The water cycle of the southwestern United States (SW) is dominated by winter storms that maintain a positive annual net precipitation. Analysis of the control and future climate from four pairs of regional and global climate models (RCMs and GCMs) shows that the RCMs simulate a higher fraction of transient eddy moisture fluxes because the hydrodynamic instabilities associated with flow over complex terrain are better resolved. Under global warming, this enables the RCMs to capture the response of transient eddies to increased atmospheric stability that allows more moisture to converge on the windward side of the mountains by blocking. As a result, RCMs simulate enhanced transient eddy moisture convergence in the SW compared to GCMs, although both robustly simulate drying due to enhanced moisture divergence by the divergent mean flow in a warmer climate. This enhanced convergence leads to reduced susceptibility to hydrological change in the RCMs compared to GCMs.

Gao, Yanhong; Leung, Lai-Yung R.; Salathe, E.; Dominguez, Francina; Nijssen, Bart; Lettenmaier, D. P.

2012-05-10T23:59:59.000Z

62

Local and Global Climate Feedbacks in Models with Differing Climate Sensitivities  

Science Conference Proceedings (OSTI)

The climatic response to a 5% increase in solar constant is analyzed in three coupled global ocean–atmosphere general circulation models, the NCAR Climate System Model version 1 (CSM1), the Community Climate System Model version 2 (CCSM2), and ...

Markus Stowasser; Kevin Hamilton; George J. Boer

2006-01-01T23:59:59.000Z

63

Stanford- Global Climate and Energy Project | Open Energy Information  

Open Energy Info (EERE)

Stanford- Global Climate and Energy Project Stanford- Global Climate and Energy Project Jump to: navigation, search Logo: Stanford- Global Climate and Energy Project Name Stanford- Global Climate and Energy Project Address 473 Via Ortega Place Stanford, California Zip 94305 Region Bay Area Coordinates 37.427774°, -122.175672° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":37.427774,"lon":-122.175672,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

64

Financing Global Climate Change Mitigation | Open Energy Information  

Open Energy Info (EERE)

Financing Global Climate Change Mitigation Financing Global Climate Change Mitigation Jump to: navigation, search Tool Summary Name: Financing Global Climate Change Mitigation Agency/Company /Organization: United Nations Economic Commission for Europe Sector: Energy Focus Area: Energy Efficiency, Renewable Energy Topics: Finance Resource Type: Publications, Guide/manual Website: www.unece.org/energy/se/pdfs/gee21/gee21_pub/GEE21_GlobalClimateChange UN Region: "Western & Eastern Europe" is not in the list of possible values (Eastern Africa, Middle Africa, Northern Africa, Southern Africa, Western Africa, Caribbean, Central America, South America, Northern America, Central Asia, Eastern Asia, Southern Asia, South-Eastern Asia, Western Asia, Eastern Europe, Northern Europe, Southern Europe, Western Europe, Australia and New Zealand, Melanesia, Micronesia, Polynesia, Latin America and the Caribbean) for this property.

65

Relative outcomes of climate change mitigation related to global  

NLE Websites -- All DOE Office Websites (Extended Search)

Relative outcomes of climate change mitigation related to global Relative outcomes of climate change mitigation related to global temperature versus sea-level rise Submitted by mkaczmar on February 8, 2013 - 15:19 Authors: Gerald A. Meehl, Aixue Hu, Claudia Tebaldi, Julie M. Arblaster, Warren M. Washington, Haiyan Teng, Benjamin M. Sanderson, Toby Ault, Warren G. Strand & James B. White III There is a common perception that, if human societies make the significant adjustments necessary to substantively cut emissions of greenhouse gases, global temperature increases could be stabilized, and the most dangerous consequences of climate change could be avoided. Here we show results from global coupled climate model simulations with the new representative concentration pathway mitigation scenarios to 2300 to illustrate that, with

66

State Roles in the Global Climate Change Issue  

Science Conference Proceedings (OSTI)

Events in 1988 helped focus the attention of several states on the global climate change issue. Consequently, the National Governors’ Association conducted an assessment in 1989 and recommended various actions. By 1994, 22 states have enacted ...

Stanley A. Changnon

1995-02-01T23:59:59.000Z

67

A Computer-based Atlas of Global Instrumental Climate Data  

Science Conference Proceedings (OSTI)

Color-shaded and contoured images of global gridded instrumental data have been produced as a computer-based atlas, available to the climate community through Internet. Each image simultaneously depicts anomaly maps of surface temperature, sea ...

Raymond S. Bradley; Linda G. Ahern; Frank T. Keimig

1994-01-01T23:59:59.000Z

68

The Indonesian Throughflow and the Global Climate System  

Science Conference Proceedings (OSTI)

The role of the Indonesian Throughflow in the global climate system is investigated with a coupled ocean–atmosphere model by contrasting simulations with realistic throughflow and closed Indonesian passages.

Niklas Schneider

1998-04-01T23:59:59.000Z

69

Monitoring Global Climate Change: The Case of Greenhouse Warming  

Science Conference Proceedings (OSTI)

Recent record high temperatures and drought conditions in many regions of the United States have prompted heightened concern about whether these are early manifestations of the global green house warming projected by the major climate models. An ...

Fred B. Wood

1990-01-01T23:59:59.000Z

70

A Global Portfolio Strategy for Climate Change Technology Development  

NLE Websites -- All DOE Office Websites (Extended Search)

A Global Portfolio Strategy for Climate Change Technology Development Speaker(s): Geoffrey J. Blanford Date: July 21, 2005 - 12:00pm Location: Bldg. 90 Seminar HostPoint of...

71

Effect of the Drake Passage Throughflow on Global Climate  

Science Conference Proceedings (OSTI)

The role of the Southern Ocean in global climate is examined using three simulations with a coupled model employing geometries different only at the location of Drake Passage (DP). The results of three main experiments are examined: 1) a ...

Willem P. Sijp; Matthew H. England

2004-05-01T23:59:59.000Z

72

Climate–Carbon Cycle Feedback Analysis: Results from the C4MIP Model Intercomparison  

Science Conference Proceedings (OSTI)

Eleven coupled climate–carbon cycle models used a common protocol to study the coupling between climate change and the carbon cycle. The models were forced by historical emissions and the Intergovernmental Panel on Climate Change (IPCC) Special ...

P. Friedlingstein; P. Cox; R. Betts; L. Bopp; W. von Bloh; V. Brovkin; P. Cadule; S. Doney; M. Eby; I. Fung; G. Bala; J. John; C. Jones; F. Joos; T. Kato; M. Kawamiya; W. Knorr; K. Lindsay; H. D. Matthews; T. Raddatz; P. Rayner; C. Reick; E. Roeckner; K.-G. Schnitzler; R. Schnur; K. Strassmann; A. J. Weaver; C. Yoshikawa; N. Zeng

2006-07-01T23:59:59.000Z

73

Secretary Chu Stresses Global Cooperation on Energy, Economic and Climate  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Stresses Global Cooperation on Energy, Economic and Stresses Global Cooperation on Energy, Economic and Climate Challenges in Talks with World Energy Ministers Secretary Chu Stresses Global Cooperation on Energy, Economic and Climate Challenges in Talks with World Energy Ministers March 13, 2009 - 12:00am Addthis Washington, DC - In recent discussions with a broad range of world energy ministers, U.S. Energy Secretary Steven Chu has stressed the need for global cooperation on energy, economic and climate challenges. Over the past several weeks, Secretary Chu's dialogue with representatives of both energy producing and consuming nations has reinforced the Obama Administration's commitment to energy independence and stressed the shared opportunities to create jobs and boost the global economy through energy

74

A University Perspective on Global Climate Modeling  

Science Conference Proceedings (OSTI)

Global atmospheric models are proliferating, in part because of the widespread availability of powerful computers. There are about two dozen global modeling groups at work in the United States today. These groups are put into four categories, ...

David A. Randall

1996-11-01T23:59:59.000Z

75

The Global Monsoon Variability Simulated by CMIP3 Coupled Climate Models  

Science Conference Proceedings (OSTI)

The global monsoon climate variability during the second half of the twentieth century simulated by 21 coupled global climate models (CGCMs) that participated in the World Climate Research Programme’s Coupled Model Intercomparison Project phase 3 ...

Hyung-Jin Kim; Bin Wang; Qinghua Ding

2008-10-01T23:59:59.000Z

76

Mapping environments at risk under different global climate change scenarios  

E-Print Network (OSTI)

ON Significant disruptions to natural ecosystems are widely expected as a result of global climate change. There is uncertainty about the pace of this change because that depends on future greenhouse gas emissions and complex no readily predictable community structure or composition. We introduce a novel approach to mapping global

Hoffman, Forrest M.

77

Globally Gridded Satellite Observations for Climate Studies  

Science Conference Proceedings (OSTI)

Geostationary satellites have provided routine, high temporal resolution Earth observations since the 1970s. Despite the long period of record, use of these data in climate studies has been limited for numerous reasons, among them that no central archive ...

Kenneth R. Knapp; Steve Ansari; Caroline L. Bain; Mark A. Bourassa; Michael J. Dickinson; Chris Funk; Chip N. Helms; Christopher C. Hennon; Christopher D. Holmes; George J. Huffman; James P. Kossin; Hai-Tien Lee; Alexander Loew; Gudrun Magnusdottir

2011-07-01T23:59:59.000Z

78

Considerations in the Selection of Global Climate Models for Regional Climate Projections: The Arctic as a Case Study  

Science Conference Proceedings (OSTI)

Climate projections at regional scales are in increased demand from management agencies and other stakeholders. While global atmosphere–ocean climate models provide credible quantitative estimates of future climate at continental scales and above,...

James E. Overland; Muyin Wang; Nicholas A. Bond; John E. Walsh; Vladimir M. Kattsov; William L. Chapman

2011-03-01T23:59:59.000Z

79

Global Climate Simulation with the University of Wisconsin Global Hybrid Isentropic Coordinate Model  

Science Conference Proceedings (OSTI)

The purpose of this study is to briefly describe the global atmospheric University of Wisconsin (UW) hybrid isentropic–eta coordinate (UW ?–?) model and document results from a 14-yr climate simulation. The model, developed through modification ...

Todd K. Schaack; Tom H. Zapotocny; Allen J. Lenzen; Donald R. Johnson

2004-08-01T23:59:59.000Z

80

Global climate change: Social and economic research issues  

SciTech Connect

This workshop was designed to bring together a group of scholars, primarily from the social sciences, to explore research that might help in dealing with global climate change. To illustrate the state of present understanding, it seemed useful to focus this workshop on three broad questions that are involved in coping with climate change. These are: (1) How can the anticipated economic costs and benefits of climate change be identified; (2) How can the impacts of climate change be adjusted to or avoided; (3) What previously studied models are available for institutional management of the global environment? The resulting discussions may (1) identify worthwhile avenues for further social science research, (2) help develop feedback for natural scientists about research information from this domain needed by social scientists, and (3) provide policymakers with the sort of relevant research information from the social science community that is currently available. Individual papers are processed separately for the database.

Rice, M.; Snow, J.; Jacobson, H. [eds.

1992-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "global climate cycle" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Assessing a Satellite-Era Perspective of the Global Water Cycle  

Science Conference Proceedings (OSTI)

The capability of a global data compilation, largely satellite based, is assessed to depict the global atmospheric water cycle’s mean state and variability. Monthly global precipitation estimates from the Global Precipitation Climatology Project (...

C. Adam Schlosser; Paul R. Houser

2007-04-01T23:59:59.000Z

82

A Global Portfolio Strategy for Climate Change Technology Development  

NLE Websites -- All DOE Office Websites (Extended Search)

A Global Portfolio Strategy for Climate Change Technology Development A Global Portfolio Strategy for Climate Change Technology Development Speaker(s): Geoffrey J. Blanford Date: July 21, 2005 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: Afzal Siddiqui John Stoops In this study we propose a novel formulation of a decision problem in R&D strategy. The problem is motivated by and applied to the context of technologies relevant to global climate change, but is characterized in general by an aggregate R&D decision-maker with a social welfare objective, technology diffusion markets subject to externalities in which private costs are minimized, and uncertainty in both technological and environmental factors. A technology strategy is defined as the allocation of R&D investment across several broad research programs, and the

83

Climate Models from the Joint Global Change Research Institute  

DOE Data Explorer (OSTI)

•\tEPIC - (aka WinEPIC) The Environmental Policy Integrated Climate (EPIC) Model is a process-based agricultural systems model composed of simulation components for weather, hydrology, nutrient cycling, pesticide fate, tillage, crop growth, soil erosion, crop and soil management and economics. Staff at PNNL have been involved in the development of this model by integrating new sub-models for soil carbon dynamics and nitrogen cycling.

84

Carbon Cycling and Biosequestration Integrating Biology and Climate Through Systems Science Report from the March 2008 Workshop  

Science Conference Proceedings (OSTI)

One of the most daunting challenges facing science in the 21st Century is to predict how Earth's ecosystems will respond to global climate change. The global carbon cycle plays a central role in regulating atmospheric carbon dioxide (CO{sub 2}) levels and thus Earth's climate, but our basic understanding of the myriad of tightly interlinked biological processes that drive the global carbon cycle remains limited at best. Whether terrestrial and ocean ecosystems will capture, store, or release carbon is highly dependent on how changing climate conditions affect processes performed by the organisms that form Earth's biosphere. Advancing our knowledge of biological components of the global carbon cycle is thus crucial to predicting potential climate change impacts, assessing the viability of climate change adaptation and mitigation strategies, and informing relevant policy decisions. Global carbon cycling is dominated by the paired biological processes of photosynthesis and respiration. Photosynthetic plants and microbes of Earth's land-masses and oceans use solar energy to transform atmospheric CO{sub 2} into organic carbon. The majority of this organic carbon is rapidly consumed by plants or microbial decomposers for respiration and returned to the atmosphere as CO{sub 2}. Coupling between the two processes results in a near equilibrium between photosynthesis and respiration at the global scale, but some fraction of organic carbon also remains in stabilized forms such as biomass, soil, and deep ocean sediments. This process, known as carbon biosequestration, temporarily removes carbon from active cycling and has thus far absorbed a substantial fraction of anthropogenic carbon emissions.

Graber, J.; Amthor, J.; Dahlman, R.; Drell, D.; Weatherwax, S.

2008-12-01T23:59:59.000Z

85

Global Ice and Land Climate Studies Using Scatterometer Image Data  

E-Print Network (OSTI)

in sea ice, and canopy leaf density--as well as by the phase state of water (meltwater on sea ice1 Global Ice and Land Climate Studies Using Scatterometer Image Data David G. Long Brigham Young CA 91109 ben@pacific.jpl.nasa.gov Sasan.Saatchi@jpl.nasa.gov Cheryl Bertoia U. S. National Ice Center

Long, David G.

86

Global Food Shortage Linked to Biofuel Use -Part III -U.S. Backlash | Climate Science & Politics Climate Science & Politics  

E-Print Network (OSTI)

Global Food Shortage Linked to Biofuel Use - Part III - U.S. Backlash | Climate Science & Politics Climate Science & Politics Home About the Site Global Food Shortage Linked to Biofuel Use - Part III - U.S. Backlash Posted in May 24th, 2008 by Climate Patrol in Biofuel, Food Crisis, Sustainability In the last few

87

Climate Change over the Equatorial Indo-Pacific in Global Warming  

Science Conference Proceedings (OSTI)

The response of the equatorial Indian Ocean climate to global warming is investigated using model outputs submitted to the Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report. In all of the analyzed climate models, the SSTs ...

Chie Ihara; Yochanan Kushnir; Mark A. Cane; Victor H. de la Peńa

2009-05-01T23:59:59.000Z

88

Aerosol Properties and Processes: A Path from Field and Laboratory Measurements to Global Climate Models  

Science Conference Proceedings (OSTI)

Aerosol particles in the lower atmosphere exert a substantial influence on climate and climate change through a variety of complex mechanisms. Consequently, there is a need to represent these influences in global climate models, and models have ...

Steven J. Ghan; Stephen E. Schwartz

2007-07-01T23:59:59.000Z

89

Mobile Facility Records Annual Climate Cycle in Niger, Africa  

NLE Websites -- All DOE Office Websites (Extended Search)

Facility Records Annual Facility Records Annual Climate Cycle in Niger, Africa Because dust can block incoming solar energy, and because solar energy drives weather and climate, scientists around the world are looking for ways to better understand these natural phenomena. In 2006, scientists sponsored by the U.S. Department of Energy's Atmospheric Radiation Measurement (ARM) Climate Research Facility conducted a year-long field campaign in Niamey, Niger, to provide key information for the African Monsoon Multidisciplinary Analyses, or AMMA, project. During the 12-month experiment at the airport in Niamey, researchers used a portable atmospheric laboratory, airplanes, and satellites to collect information about clouds, aerosols, and solar and terrestrial energy in the skies above the site. Measurements obtained

90

Pew Center on Global Climate Change | Open Energy Information  

Open Energy Info (EERE)

Pew Center on Global Climate Change Pew Center on Global Climate Change Jump to: navigation, search Name Pew Center on Global Climate Change Place Arlington, Virginia Zip 22201 Product Established in 1998 as a non-profit, non-partisan and independent organisation aiming to provide unbiased information and solutions in the efforts to tackle climate change. Coordinates 43.337585°, -89.379449° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":43.337585,"lon":-89.379449,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

91

The economics of long-term global climate change  

SciTech Connect

This report is intended to provide an overview of economic issues and research relevant to possible, long-term global climate change. It is primarily a critical survey, not a statement of Administration or Department policy. This report should serve to indicate that economic analysis of global change is in its infancy few assertions about costs or benefits can be made with confidence. The state of the literature precludes any attempt to produce anything like a comprehensive benefit-cost analysis. Moreover, almost all the quantitative estimates regarding physical and economic effects in this report, as well as many of the qualitative assertions, are controversial. Section I provides background on greenhouse gas emissions and their likely climatic effects and on available policy instruments. Section II considers the costs of living with global change, assuming no substantial efforts to reduce greenhouse gas emissions. Section III considers costs of reducing these emissions, though the available literature does not contain estimates of the costs of policies that would, on the assumptions of current climate models, prevent climate change altogether. The individual sections are not entirely compartmentalized, but can be read independently if necessary.

1990-09-01T23:59:59.000Z

92

Technological Options to Address Global Climate Change  

NLE Websites -- All DOE Office Websites (Extended Search)

2K-2854 RAB 4/01 2K-2854 RAB 4/01 Hydro 8% Coal 22% Coal 22% Other 1% Gas 23% Gas 23% Coal 19% Coal 19% Gas 28% Gas 28% Fossil Fuels Will Continue as Key to World Economy 1999 data from International Energy Annual 1999 (February 2001) 2020 data from International Energy Outlook 2001 (March 2001) + 6 0 % Oil 40% Hydro 7% Other 0.7% Nuclear 7% 1999 85% Fossil Energy 382 Qbtu / yr 2020 85% Fossil Energy 607 Qbtu / yr Oil 40% Nuclear 4% 2K-2854 RAB 4/01 World Energy Demand Growing Dramatically 0 2 4 6 8 12 2000 2050 2100 0 200 400 600 800 1000 1200 1400 Population (Billions) Energy Consumption (Qbtu / yr) Population Projections: United Nations "Long-Range World Population Projections: Based on the 1998 Revision" Energy Projections: "Global Energy Perspectives" ITASA / WEC World Population Population of

93

ORNL DAAC, global climate data, GIS formats  

NLE Websites -- All DOE Office Websites (Extended Search)

Data in GIS Formats Data in GIS Formats ORNL DAAC has re-released a key climatology data set in two additional formats especially suitable for geographic information system (GIS) users. Version 2.1 of "Global 30-Year Mean Monthly Climatology, 1930-1960 (Cramer and Leemans)" now offers the data in ASCII GRID format and binary format. These formats can be read directly into software packages such as ESRI's ARC/INFO and ERDAS' IMAGINE. The Cramer and Leemans climatology data set contains monthly averages of mean temperature, temperature range, precipitation, rain days, and sunshine hours for the terrestrial surface of the globe. It is gridded at a 0.5-degree longitude/latitude resolution. The Cramer and Leemans data are also available in the original ASCII format, which can be read in FORTRAN or with programs such as SAS.

94

Primary productivity control of simulated carbon cycle-climate feedbacks. Geophys  

E-Print Network (OSTI)

[1] Positive feedbacks between the terrestrial carbon cycle and climate represent an outstanding area of uncertainty in simulations of future climate change. Coupled climatecarbon cycle models have simulated widely divergent feedback magnitudes, and attempts to explain model differences have had only limited success. In this study, we demonstrate that the response of vegetation primary productivity to climate changes is a critical controlling factor in determining the strength of simulated carbon cycle-climate feedbacks. This conclusion sheds new light on coupled climate-carbon cycle model results, and highlights the need for improved model representation of photosynthesis processes so as to better constrain future projections of climate change. Citation: Matthews, H. D.,

H. Damon Matthews; Michael Eby; Andrew J. Weaver; Barbara J. Hawkins; M. Eby; A. J. Weaver; B. J. Hawkins

2005-01-01T23:59:59.000Z

95

Posters Radiation Impacts on Global Climate Models F. Baer, N. Arsky, and K. Rocque  

NLE Websites -- All DOE Office Websites (Extended Search)

5 5 Posters Radiation Impacts on Global Climate Models F. Baer, N. Arsky, and K. Rocque University of Maryland College Park, Maryland Climate Prediction and Radiative Heating Climate models are driven by forcing, and these forces are seen primarily by the thermal field in general circulation models (GCMs). The major forces that affect the thermal field are longwave radiative (LWR) heating, shortwave radiative (SWR) heating, and convection (cumulus, etc.). These forcing effects are cycled through the thermal field to the motion field by nonlinear transfer. The dependent variables-in particular, temperature (T), moisture (Q) and especially clouds-evolve in time in a model and determine the subsequent forcing. If the dependent variables are not accurately calculated in space and time, the forcing

96

Comparison of the Impact of Global Climate Changes and Urbanization on Summertime Future Climate in the Tokyo Metropolitan Area  

Science Conference Proceedings (OSTI)

In this study, the impact of global climate change and anticipated urbanization over the next 70 years is estimated with regard to the summertime local climate in the Tokyo metropolitan area (TMA), whose population is already near its peak now. ...

Sachiho A. Adachi; Fujio Kimura; Hiroyuki Kusaka; Tomoshige Inoue; Hiroaki Ueda

2012-08-01T23:59:59.000Z

97

Global climate change and the mitigation challenge  

SciTech Connect

Anthropogenic emissions of greenhouse gases, especially carbon dioxide (CO{sub 2}), have led to increasing atmospheric concentrations, very likely the primary cause of the 0.8{sup o}C warming the Earth has experienced since the Industrial Revolution. With industrial activity and population expected to increase for the rest of the century, large increases in greenhouse gas emissions are projected, with substantial global additional warming predicted. This paper examines forces driving CO{sub 2} emissions, a concise sector-by-sector summary of mitigation options, and research and development (R&D) priorities. To constrain warming to below approximately 2.5{sup o}C in 2100, the recent annual 3% CO{sub 2} emission growth rate needs to transform rapidly to an annual decrease rate of from 1 to 3% for decades. Furthermore, the current generation of energy generation and end-use technologies are capable of achieving less than half of the emission reduction needed for such a major mitigation program. New technologies will have to be developed and deployed at a rapid rate, especially for the key power generation and transportation sectors. Current energy technology research, development, demonstration, and deployment (RDD&D) programs fall far short of what is required. 20 refs., 18 figs., 4 tabs.

Frank Princiotta [U.S. Environmental Protection Agency, Research Triangle Park, NC (United States). Air Pollution Prevention and Control Division

2009-10-15T23:59:59.000Z

98

Global Climate and Energy Project | Open Energy Information  

Open Energy Info (EERE)

Project Project Jump to: navigation, search Logo: Global Climate and Energy Project Name Global Climate and Energy Project Address 473 Via Ortega, Suite 324 Place Stanford, California Zip 94305 Region Bay Area Number of employees 201-500 Year founded 2002 Phone number (650) 725-3230 Coordinates 37.428392°, -122.175919° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":37.428392,"lon":-122.175919,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

99

USA National Phenology Network: Plant and Animal Life-Cycle Data Related to Climate Change  

DOE Data Explorer (OSTI)

Phenology refers to recurring plant and animal life cycle stages, such as leafing and flowering, maturation of agricultural plants, emergence of insects, and migration of birds. It is also the study of these recurring plant and animal life cycle stages, especially their timing and relationships with weather and climate. Phenology affects nearly all aspects of the environment, including the abundance and diversity of organisms, their interactions with one another, their functions in food webs, and their seasonable behavior, and global-scale cycles of water, carbon, and other chemical elements. Phenology records can help us understand plant and animal responses to climate change; it is a key indicator. The USA-NPN brings together citizen scientists, government agencies, non-profit groups, educators, and students of all ages to monitor the impacts of climate change on plants and animals in the United States. The network harnesses the power of people and the Internet to collect and share information, providing researchers with far more data than they could collect alone.[Extracts copied from the USA-NPN home page and from http://www.usanpn.org/about].

100

A mechanism for landocean contrasts in global monsoon trends in a warming climate  

E-Print Network (OSTI)

A mechanism for land­ocean contrasts in global monsoon trends in a warming climate J. Fasullo of the global monsoon record involves reported decreases in rainfall over land during an era in which the global in the monsoons in a warming climate while bolstering the concept of the global monsoon in the context of shared

Fasullo, John

Note: This page contains sample records for the topic "global climate cycle" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Chemistry of organic carbon in soil with relationship to the global carbon cycle  

SciTech Connect

Various ecosystem disturbances alter the balances between production of organic matter and its decomposition and therefore change the amount of carbon in soil. The most severe perturbation is conversion of natural vegetation to cultivated crops. Conversion of natural vegetation to cultivated crops results in a lowered input of slowly decomposing material which causes a reduction in overall carbon levels. Disruption of soil matrix structure by cultivation leads to lowered physical protection of organic matter resulting in an increased net mineralization rate of soil carbon. Climate change is another perturbation that affects the amount and composition of plant production, litter inputs, and decomposition regimes but does not affect soil structure directly. Nevertheless, large changes in soil carbon storage are probable with anticipated CO2 induced climate change, particularly in northern latitudes where anticipated climate change will be greatest (MacCracken and Luther 1985) and large amounts of soil organic matter are found. It is impossible, given the current state of knowledge of soil organic matter processes and transformations to develop detailed process models of soil carbon dynamics. Largely phenomenological models appear to be developing into predictive tools for understanding the role of soil organic matter in the global carbon cycle. In particular, these models will be useful in quantifying soil carbon changes due to human land-use and to anticipated global climate and vegetation changes. 47 refs., 7 figs., 2 tabs.

Post, W.M. III

1988-01-01T23:59:59.000Z

102

Simulations of the global carbon cycle and anthropogenic CO{sub 2} transient. Annual report  

SciTech Connect

This research focuses on improving the understanding of the anthropogenic carbon dioxide transient using observations and models of the past and present. In addition, an attempt is made to develop an ability to predict the future of the carbon cycle in response to continued anthropogenic perturbations and climate change. Three aspects of the anthropogenic carbon budget were investigated: (1) the globally integrated budget at the present time; (2) the time history of the carbon budget; and (3) the spatial distribution of carbon fluxes. One of the major activities of this study was the participation in the model comparison study of Enting, et al. [1994] carried out in preparation for the IPCC 1994 report.

Sarmiento, J.L.

1994-07-01T23:59:59.000Z

103

U.S. Global Climate Change program | OpenEI Community  

Open Energy Info (EERE)

U.S. Global Climate Change program U.S. Global Climate Change program Home Graham7781's picture Submitted by Graham7781(1992) Super contributor 18 January, 2013 - 15:46 U.S. Global Change Research Program publishes "National Climate Assessment" report for United States climate change drought OpenEI sea level rise temperatures U.S. Global Climate Change program The U.S. Global Change Research Program, established under the Department of Commerce in 2010, and partnered with NOAA, released an extensive National Climate Assessment report, projecting future climate changes in the United States under different scenarios. The 1,200 page report highlights some rather grim findings about the future of climate change. Here are 5 of the more disconcerting graphics from the report: 1. U.S. Average Temperatures

104

Integrated Assessment of Global Climate Change | U.S. DOE Office of Science  

NLE Websites -- All DOE Office Websites (Extended Search)

Integrated Assessment of Global Integrated Assessment of Global Climate Change Biological and Environmental Research (BER) BER Home About Research Research Abstracts Searchable Archive of BER Highlights External link Biological Systems Science Division (BSSD) Climate and Environmental Sciences Division (CESD) ARM Climate Research Facility Atmospheric System Research (ASR) Program Data Management Earth System Modeling (ESM) Program William R. Wiley Environmental Molecular Sciences Laboratory (EMSL) Integrated Assessment of Global Climate Change Regional & Global Climate Modeling (RGCM) Program Subsurface Biogeochemical Research Terrestrial Carbon Sequestration External link Terrestrial Ecosystem Science Facilities Science Highlights Benefits of BER Funding Opportunities Biological & Environmental Research Advisory Committee (BERAC)

105

The 100 000-Yr Cycle in Tropical SST, Greenhouse Forcing, and Climate Sensitivity  

Science Conference Proceedings (OSTI)

The key scientific uncertainty in the global warming debate is the equilibrium climate sensitivity. Coupled atmosphere–ocean general circulation models predict a wide range of equilibrium climate sensitivities, with a consequently large spread of ...

David W. Lea

2004-06-01T23:59:59.000Z

106

Coupled Climate Simulation of the Evolution of Global Monsoons in the Holocene  

Science Conference Proceedings (OSTI)

Evolution of global monsoons in the Holocene is simulated in a coupled climate model—the Fast Ocean Atmosphere Model—and is also compared with the simulations in another coupled climate model—the NCAR Climate System Model. Holocene climates are ...

Z. Liu; B. Otto-Bliesner; J. Kutzbach; L. Li; C. Shields

2003-08-01T23:59:59.000Z

107

Global Vegetation and Land Use: New High-Resolution Data Bases for Climate Studies  

Science Conference Proceedings (OSTI)

Global vegetation and land-use data bases (1° latitude by 1° longitude resolution), designed for use in studies of climate and climate change, were compiled in digital form drawing upon approximately 100 published sources complemented by a large ...

Elaine Matthews

1983-03-01T23:59:59.000Z

108

Physically Based Global Downscaling: Climate Change Projections for a Full Century  

Science Conference Proceedings (OSTI)

A global atmosphere–land model with an embedded subgrid orography scheme is used to simulate the period 1977–2100 using ocean surface conditions and radiative constituent concentrations for a climate change scenario. Climate variables simulated ...

Steven J. Ghan; Timothy Shippert

2006-05-01T23:59:59.000Z

109

A Comparison of Soil-Moisture Sensitivity in Two Global Climate Models  

Science Conference Proceedings (OSTI)

Area-averaged surface hydrological processes from two global spectral general circulation climate models coupled to simple slab-ocean mixed layers are compared for the climates simulated with present-day (control) and increased atmospheric carbon ...

Gerald A. Meehl; Warren M. Washington

1988-05-01T23:59:59.000Z

110

Inadvertent Weather Modification in Urban Areas: Lessons for Global Climate Change  

Science Conference Proceedings (OSTI)

Large metropolitan areas in North America, home to 65% of the nation's population, have created major changes in their climates over the past 150 years. The rate and amount of the urban climate change approximate those being predicted globally ...

Stanley A. Changnon

1992-05-01T23:59:59.000Z

111

Climate change and agriculture : global and regional effects using an economic model of international trade  

E-Print Network (OSTI)

Empirical estimates of the economic welfare implications of the impact of climate change on global agricultural production are made. Agricultural yield changes resulting from climate scenarios associated with a doubling ...

Reilly, John M.

1993-01-01T23:59:59.000Z

112

Coupling of Convective Momentum Transport with Convective Heating in Global Climate Simulations  

Science Conference Proceedings (OSTI)

The effects of convective momentum transport (CMT) on global climate simulations are examined in this study. Comparison between two sets of 20-yr (1979–98) integration using the NCAR Community Climate Model version 3 (CCM3) illustrates that the ...

Xiaoqing Wu; Liping Deng; Xiaoliang Song; Guang Jun Zhang

2007-04-01T23:59:59.000Z

113

Regional Climate Models Add Value to Global Model Data: A Review and Selected Examples  

Science Conference Proceedings (OSTI)

An important challenge in current climate modeling is to realistically describe small-scale weather statistics, such as topographic precipitation and coastal wind patterns, or regional phenomena like polar lows. Global climate models simulate atmospheric ...

Frauke Feser; Burkhardt Rockel; Hans von Storch; Jörg Winterfeldt; Matthias Zahn

2011-09-01T23:59:59.000Z

114

GFDL's CM2 Global Coupled Climate Models. Part I: Formulation and Simulation Characteristics  

Science Conference Proceedings (OSTI)

The formulation and simulation characteristics of two new global coupled climate models developed at NOAA's Geophysical Fluid Dynamics Laboratory (GFDL) are described. The models were designed to simulate atmospheric and oceanic climate and ...

Thomas L. Delworth; Anthony J. Broccoli; Anthony Rosati; Ronald J. Stouffer; V. Balaji; John A. Beesley; William F. Cooke; Keith W. Dixon; John Dunne; K. A. Dunne; Jeffrey W. Durachta; Kirsten L. Findell; Paul Ginoux; Anand Gnanadesikan; C. T. Gordon; Stephen M. Griffies; Rich Gudgel; Matthew J. Harrison; Isaac M. Held; Richard S. Hemler; Larry W. Horowitz; Stephen A. Klein; Thomas R. Knutson; Paul J. Kushner; Amy R. Langenhorst; Hyun-Chul Lee; Shian-Jiann Lin; Jian Lu; Sergey L. Malyshev; P. C. D. Milly; V. Ramaswamy; Joellen Russell; M. Daniel Schwarzkopf; Elena Shevliakova; Joseph J. Sirutis; Michael J. Spelman; William F. Stern; Michael Winton; Andrew T. Wittenberg; Bruce Wyman; Fanrong Zeng; Rong Zhang

2006-03-01T23:59:59.000Z

115

Evaluation of Regional Climate Simulations over the Great Lakes Region Driven by Three Global Data Sets  

SciTech Connect

The performance of regional climate simulations is evaluated for the Great Lakes region. Three 10-year (1990–1999) current-climate simulations are performed using the MM5 regional climate model (RCM) with 36-km horizontal resolution. The simulations employed identical configuration and physical parameterizations, but different lateral boundary conditions and sea-surface temperatures derived from the NCEP Global Reanalysis and output from the CCSM3 and GISS general circulation models (GCMs). The simulation results are compared to the North American Regional Reanalysis (NARR). The three RCM simulations appeared to be more accurate in winter and least accurate in summer, and more accurate aloft than near the surface. The reanalysis-constrained simulation adequately captured the spatial distribution and seasonal cycle of the observed surface-air temperature and precipitation, but it produced consistently across all seasons a cold bias that is generally larger over the lakes than over land and a wet bias due to an overestimation of nonconvective precipitation. The simulated seasonal cycle of moisture–flux convergence over the region was in very good agreement with NARR. The two GCM-driven runs adequately simulated the spatial and seasonal variation of temperature, but overestimated cold-season precipitation and underestimated summer precipitation, reversing the observed annual precipitation cycle. The GISS-driven run failed to simulate the prevailing low-level flow and moisture convergence patterns. All three RCM simulations successfully captured the impact of the Great Lakes on the region's climate, especially on winter precipitation, a significant improvement over coarse-resolution GCM simulations over the region.

Zhong, Shiyuan (Sharon); Li, Xiuping; Bian, Xindi; Heilman, Warren E.; Leung, Lai-Yung R.; Gustafson, William I.

2012-06-27T23:59:59.000Z

116

Long-Term Predictions of Global Climate Using the Ocean Conveyor  

SciTech Connect

Many have attributed the Great Ocean Conveyor as a major driver of global climate change over millennia as well as a possible explanation for shorter (multidecadal) oscillations. The conveyor is thought to have a cycle time on the order of 1000 years, however recent research has suggested that it is much faster than previously believed (about 100 years). A faster conveyor leads to the possibility of the conveyor's role in even shorter oscillations such as the El Nino/Southern Oscillation (ENSO) and the North Atlantic Oscillation (NAO). The conveyor is primarily density driven. In this study the salty outflow of the Red Sea is used to predict its behavior ten years into the future. A successful model could lead to a long-term prediction (ten years) of El Ninos, Atlantic hurricane season intensity, as well as global temperature and precipitation patterns.

Ray, P.; Wilson, J.R.

2003-01-01T23:59:59.000Z

117

A Global Land System Framework for Integrated Climate-Change Assessments  

E-Print Network (OSTI)

Land ecosystems play a major role in the global cycles of energy, water, carbon and nutrients. A Global Land System (GLS) framework has been developed for the Integrated Global Systems Model Version 2 (IGSM2) to simulate ...

Schlosser, C. Adam

118

Climate impacts of bioenergy: Inclusion of carbon cycle and albedo dynamics in life cycle impact assessment  

SciTech Connect

Life cycle assessment (LCA) can be an invaluable tool for the structured environmental impact assessment of bioenergy product systems. However, the methodology's static temporal and spatial scope combined with its restriction to emission-based metrics in life cycle impact assessment (LCIA) inhibits its effectiveness at assessing climate change impacts that stem from dynamic land surface-atmosphere interactions inherent to all biomass-based product systems. In this paper, we focus on two dynamic issues related to anthropogenic land use that can significantly influence the climate impacts of bioenergy systems: i) temporary changes to the terrestrial carbon cycle; and ii) temporary changes in land surface albedo-and illustrate how they can be integrated within the LCA framework. In the context of active land use management for bioenergy, we discuss these dynamics and their relevancy and outline the methodological steps that would be required to derive case-specific biogenic CO{sub 2} and albedo change characterization factors for inclusion in LCIA. We demonstrate our concepts and metrics with application to a case study of transportation biofuel sourced from managed boreal forest biomass in northern Europe. We derive GWP indices for three land management cases of varying site productivities to illustrate the importance and need to consider case- or region-specific characterization factors for bioenergy product systems. Uncertainties and limitations of the proposed metrics are discussed. - Highlights: Black-Right-Pointing-Pointer A method for including temporary surface albedo and carbon cycle changes in Life Cycle Impact Assessment (LCIA) is elaborated. Black-Right-Pointing-Pointer Concepts are applied to a single bioenergy case whereby a range of feedstock productivities are shown to influence results. Black-Right-Pointing-Pointer Results imply that case- and site-specific characterization factors can be essential for a more informed impact assessment. Black-Right-Pointing-Pointer Uncertainties and limitations of the proposed methodologies are elaborated.

Bright, Ryan M., E-mail: ryan.m.bright@ntnu.no; Cherubini, Francesco; Stromman, Anders H.

2012-11-15T23:59:59.000Z

119

Global climate change: An east room roundtable. Held in Washington, DC, on July 24, 1997  

SciTech Connect

The report provides comments from a roundtable that discusses global climate change and its possible effects on the environment and humans.

1997-07-24T23:59:59.000Z

120

OpenEI Community - U.S. Global Climate Change program  

Open Energy Info (EERE)

http:en.openei.orgcommunitytaxonomyterm1770 en U.S. Global Change Research Program publishes "National Climate Assessment" report for United States http:en.openei.org...

Note: This page contains sample records for the topic "global climate cycle" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Carbon Cycle Uncertainty Increases Climate Change Risks and Mitigation Challenges PAUL A. T. HIGGINS  

E-Print Network (OSTI)

Carbon Cycle Uncertainty Increases Climate Change Risks and Mitigation Challenges PAUL A. T about the carbon cycle: 1) that elevated atmospheric CO2 concentrations will enhance terrestrial carbon that carbon cycle uncertainty is considerably larger than currently recognized and that plausible carbon cycle

Kammen, Daniel M.

122

Regional Climates in the GISS Global Circulation Model: Synoptic-Scale Circulation  

Science Conference Proceedings (OSTI)

Model simulations of global climate change are seen as an essential component of any program at understanding human impact on the global environment. A major weakness of current general circulation models (GCMs), however, is their perceived ...

B. Hewitson; R. G. Crane

1992-09-01T23:59:59.000Z

123

U.S. Global Change Research Program publishes "National Climate Assessment"  

Open Energy Info (EERE)

U.S. Global Change Research Program publishes "National Climate Assessment" U.S. Global Change Research Program publishes "National Climate Assessment" report for United States Home > Groups > OpenEI Community Central Graham7781's picture Submitted by Graham7781(2002) Super contributor 18 January, 2013 - 15:46 climate change drought OpenEI sea level rise temperatures U.S. Global Climate Change program The U.S. Global Change Research Program, established under the Department of Commerce in 2010, and partnered with NOAA, released an extensive National Climate Assessment report, projecting future climate changes in the United States under different scenarios. The 1,200 page report highlights some rather grim findings about the future of climate change. Here are 5 of the more disconcerting graphics from the report: 1. U.S. Average Temperatures

124

and Implications for the Global Carbon Cycle Executive Summary  

E-Print Network (OSTI)

North America is currently a net source of carbon dioxide to the atmosphere, contributing to the global buildup of greenhouse gases in the atmosphere and associated changes in the earth’s climate. In 2003, North America emitted nearly two billion metric tons of carbon to the atmosphere as carbon dioxide. North America’s fossil fuel emissions in 2003 (1856 million metric tons of carbon ±10 % with 95 % certainty) were 27 % of global emissions. Approximately 85 % of those emissions were from the United States, 9 % from Canada and 6 % from Mexico. The conversion of fossil fuels to energy (primarily electricity) is the single largest contributor, accounting for approximately 42 % of North American fossil emissions in 2003. Transportation is the second largest, accounting for 31 % of total emissions. There are also globally important carbon sinks in North America. In 2003, growing vegetation in North America removed approximately 530 million tons of carbon per year ( ± 50%) from the atmosphere and stored it as plant material and soil organic matter. This land sink is equivalent to approximately 30 % of the fossil fuel emissions from North America. The imbalance between the fossil fuel source and the sink on land is a net release to the atmosphere of 1335 million metric tons of carbon per year ( ± 25%). Approximately 50 % of North America’s terrestrial sink is due to the regrowth of forests in the United

Lisa Dilling (co-lead; David M. Fairman; Richard A. Houghton; Gregg H. Marl; Adam Z. Rose; Thomas J. Wilbanks

2007-01-01T23:59:59.000Z

125

Reconciling uncertainties in integrated science and policy models: Applications to global climate change  

SciTech Connect

In this thesis tools of data reconciliation are used to integrate available information into scientific and policy models of greenhouse gases. The role of uncertainties in scientific and policy models of global climate change is examined, and implications for global change policy are drawn. Methane is the second most important greenhouse gas. Global sources and sinks of methane have significant uncertainties. A chance constrained methodology was developed and used to perform inversions on the global methane cycle. Budgets of methane that are consistent with source fluxes, isotopic and ice core measurements were determined. While it is not possible to come up with a single budget for CH{sub 4}, performing the calculation with a number of sets of assumed priors suggests a convergence in the allowed range for sources. In some cases -- wetlands (70-130 Tg/yr), rice paddies (60-125 Tg/yr) a significant reduction in the uncertainty of the source estimate is achieved. Our results compare favorably with the most recent measurements of flux estimates. For comparison, a similar analysis using bayes monte carlo simulation was performed. The question of the missing sink for carbon remains unresolved. Two analyses that attempt to quantify the missing sink were performed. First, a steady state analysis of the carbon cycle was used to determine the pre-industrial inter-hemispheric carbon concentration gradient. Second, a full blown dynamic inversion of the carbon cycle was performed. An advection diffusion ocean model with surface chemistry, coupled to box models of the atmosphere and the biosphere was inverted to fit available measurements of {sup 12}C and {sup 14}C carbon isotopes using Differential-Algebraic Optimization. The model effectively suggests that the {open_quotes}missing{close_quotes} sink for carbon is hiding in the biosphere. Scenario dependent trace gas indices were calculated for CH{sub 4}, N{sub 2}O, HCFC-22.

Kandlikar, M.

1994-12-01T23:59:59.000Z

126

Impact of emissions, chemistry, and climate on atmospheric carbon monoxide : 100-year predictions from a global chemistry-climate model  

E-Print Network (OSTI)

The possible trends for atmospheric carbon monoxide in the next 100 yr have been illustrated using a coupled atmospheric chemistry and climate model driven by emissions predicted by a global economic development model. ...

Wang, Chien.; Prinn, Ronald G.

127

A Global Climate Model (GENESIS) with a Land-Surface Transfer Scheme (LSX). Part I: Present Climate Simulation  

Science Conference Proceedings (OSTI)

The present-day climatology of a global climate model (GENESIS Version 1.02) is described. The model includes a land-surface transfer component (LSX) that accounts for the physical effects of vegetation. The atmospheric general circulation model ...

Starley L. Thompson; David Pollard

1995-04-01T23:59:59.000Z

128

Biogeophysical effects of CO2-fertilization on global climate  

SciTech Connect

CO{sub 2}-fertilization affects plant growth, which modifies surface physical properties, altering the surface albedo, and fluxes of sensible and latent heat. We investigate how such CO{sub 2}-fertilization effects on vegetation and surface properties would affect the climate system. Using a global three-dimensional climate-carbon model that simulates vegetation dynamics, we compare two multi-century simulations: a ''Control'' simulation with no emissions, and a ''Physiol-noGHG'' simulation where physiological changes occur as a result of prescribed CO{sub 2} emissions, but where CO{sub 2}-induced greenhouse warming is not included. In our simulations, CO{sub 2}-fertilization produces warming; we obtain an annual- and global-mean warming of about 0.65 K (and land-only warming of 1.4 K) after 430 years. This century-scale warming is mostly due to a decreased surface albedo associated with the expansion of the Northern Hemisphere boreal forests. On decadal time scales, the CO{sub 2} uptake by afforestation should produce a cooling effect that exceeds this albedo-based warming; but if the forests remain in place, the CO{sub 2}-enhanced-greenhouse effect would diminish as the ocean equilibrates with the atmosphere, whereas the albedo effect would persist. Thus, on century time scales, there is the prospect for net warming from CO{sub 2}-fertilization of the land biosphere. Further study is needed to confirm and better quantify our results.

Bala, G; Caldeira, K; Mirin, A; Wickett, M; Delire, C; Phillips, T J

2006-04-26T23:59:59.000Z

129

Local Versus Nonlocal Boundary-Layer Diffusion in a Global Climate Model  

Science Conference Proceedings (OSTI)

The results of a local and a nonlocal scheme for vertical diffusion in the atmospheric boundary layer are compared within the context of a global climate model. The global model is an updated version of the NCAR Community Climate Model (CCM2). ...

A. A. M. Holtslag; B. A. Boville

1993-10-01T23:59:59.000Z

130

Long-term global nuclear energy and fuel cycle strategies  

SciTech Connect

The Global Nuclear Vision Project is examining, using scenario building techniques, a range of long-term nuclear energy futures. The exploration and assessment of optimal nuclear fuel-cycle and material strategies is an essential element of the study. To this end, an established global E{sup 3} (energy/economics/environmental) model has been adopted and modified with a simplified, but comprehensive and multi-regional, nuclear energy module. Consistent nuclear energy scenarios are constructed using this multi-regional E{sup 3} model, wherein future demands for nuclear power are projected in price competition with other energy sources under a wide range of long-term demographic (population, workforce size and productivity), economic (price-, population-, and income-determined demand for energy services, price- and population-modified GNP, resource depletion, world-market fossil energy prices), policy (taxes, tariffs, sanctions), and top-level technological (energy intensity and end-use efficiency improvements) drivers. Using the framework provided by the global E{sup 3} model, the impacts of both external and internal drivers are investigated. The ability to connect external and internal drivers through this modeling framework allows the study of impacts and tradeoffs between fossil- versus nuclear-fuel burning, that includes interactions between cost, environmental, proliferation, resource, and policy issues.

Krakowski, R.A. [Los Alamos National Lab., NM (United States). Technology and Safety Assessment Div.

1997-09-24T23:59:59.000Z

131

An Urban Parameterization for a Global Climate Model. Part I: Formulation and Evaluation for Two Cities  

Science Conference Proceedings (OSTI)

Urbanization, the expansion of built-up areas, is an important yet less-studied aspect of land use/land cover change in climate science. To date, most global climate models used to evaluate effects of land use/land cover change on climate do not ...

K. W. Oleson; G. B. Bonan; J. Feddema; M. Vertenstein; C. S. B. Grimmond

2008-04-01T23:59:59.000Z

132

A Comparison of Climates Simulated by a General Circulation Model when Run in the Annual Cycle and Perpetual Modes  

Science Conference Proceedings (OSTI)

A comparison is made between the climate simulated by the Canadian Climate Centre (CCC) General Circulation Model when run its usual “annual cycle”mode, in which the solar declination angle varies annually, and the climate which is simulated when ...

F. W. Zwiers; G. J. Boer

1987-11-01T23:59:59.000Z

133

Constraining Climate Sensitivity from the Seasonal Cycle in Surface Temperature  

Science Conference Proceedings (OSTI)

The estimated range of climate sensitivity has remained unchanged for decades, resulting in large uncertainties in long-term projections of future climate under increased greenhouse gas concentrations. Here the multi-thousand-member ensemble of ...

Reto Knutti; Gerald A. Meehl; Myles R. Allen; David A. Stainforth

2006-09-01T23:59:59.000Z

134

Object-Oriented Energy, Climate, and Technology Systems (ObjECTS) Global  

Open Energy Info (EERE)

Object-Oriented Energy, Climate, and Technology Systems (ObjECTS) Global Object-Oriented Energy, Climate, and Technology Systems (ObjECTS) Global Change Assessment Model (GCAM) Jump to: navigation, search LEDSGP green logo.png FIND MORE DIA TOOLS This tool is part of the Development Impacts Assessment (DIA) Toolkit from the LEDS Global Partnership. Tool Summary LAUNCH TOOL Name: Object-Oriented Energy, Climate, and Technology Systems (ObjECTS) Global Change Assessment Model (GCAM) Agency/Company /Organization: Pacific Northwest National Laboratory, University of Maryland, Joint Global Change Research Institute Sector: Climate, Energy, Land Focus Area: Non-renewable Energy, Agriculture, Biomass, Forestry, Hydrogen, Transportation Topics: Co-benefits assessment, Pathways analysis Resource Type: Software/modeling tools User Interface: Desktop Application

135

Climate-Weather Modeling Studies Using a Prototype Global Cloud-System  

NLE Websites -- All DOE Office Websites (Extended Search)

Climate-Weather Modeling Studies Using a Prototype Global Cloud-System Resolving Model Climate-Weather Modeling Studies Using a Prototype Global Cloud-System Resolving Model Climate-Weather Modeling Studies Using a Prototype Global Cloud-System Resolving Model PI Name: Venkatramani Balaji PI Email: balaji@princeton.edu Institution: Geophysical Fluid Dynamics Laboratory Allocation Program: ESP Allocation Hours at ALCF: 150 Million Year: 2010 to 2013 Research Domain: Earth Science We expect our understanding of the role of clouds in climate to undergo a qualitative change as the resolutions of global models begin to encompass clouds. At these resolutions, non-hydrostatic dynamics become significant and deep convective processes are resolved. We are poised at the threshold of being able to run global scale simulations that include direct, non-parameterized, simulations of deep convective clouds. The goal of this

136

Climate–Carbon Cycle Model Response to Freshwater Discharge into the North Atlantic  

Science Conference Proceedings (OSTI)

The response of a coupled climate–carbon cycle model to discharge of freshwater into the North Atlantic is investigated with regard to cold reversals caused by meltwater from northern continental ice sheets such as the Younger Dryas during the ...

Atsushi Obata

2007-12-01T23:59:59.000Z

137

Uncertainties in CMIP5 climate projections due to carbon cycle feedbacks  

Science Conference Proceedings (OSTI)

In the context of Coupled Model Intercomparison Project phase 5, most climate simulations use prescribed atmospheric CO2 concentration and therefore do not interactively include the effect of carbon cycle feedbacks. However, the RCP8.5 scenario ...

Pierre Friedlingstein; Malte Meinshausen; Vivek K. Arora; Chris D. Jones; Alessandro Anav; Spencer K. Liddicoat; Reto Knutti

138

The Tropical Water and Energy Cycles in a Cumulus Ensemble Model. Part I: Equilibrium Climate  

Science Conference Proceedings (OSTI)

A cumulus ensemble model is used to study the tropical water and energy cycles and their role in the climate system. The model includes cloud dynamics, radiative processes, and microphysics that incorporate all important production and conversion ...

C. H. Sui; K. M. Lau; W. K. Tao; J. Simpson

1994-03-01T23:59:59.000Z

139

Dynamic Response of Terrestrial Hydrological Cycles and Plant Water Stress to Climate Change in China  

Science Conference Proceedings (OSTI)

Rising atmospheric CO2 concentration CO2 and climate change are expected to have a major effect on terrestrial ecosystem hydrological cycles and plant water stress in the coming decades. The present study investigates the potential responses of ...

Fulu Tao; Zhao Zhang

2011-06-01T23:59:59.000Z

140

Urban climate resilience : a global assessment of city adaptation plans  

E-Print Network (OSTI)

As policy makers accept climate change as an irrefutable threat, adaptation planning has emerged as a necessary action for countries, states, and municipalities. This thesis explores adaptive responses to climate change ...

Katich, Kristina Noel

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "global climate cycle" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Controls of Global Snow under a Changed Climate  

Science Conference Proceedings (OSTI)

This study assesses the ability of a newly developed high-resolution coupled model from the Geophysical Fluid Dynamics Laboratory to simulate the cold-season hydroclimate in the present climate and examines its response to climate change forcing. ...

Sarah B. Kapnick; Thomas L. Delworth

2013-08-01T23:59:59.000Z

142

Berkeley Lab Earth Sciences Division - Research - Programs - Climate &  

NLE Websites -- All DOE Office Websites (Extended Search)

research > programs > climate_carbon_sciences research > programs > climate_carbon_sciences Climate & Carbon Sciences Program Research Areas The Carbon Cycle Better Models for Robust Climate Projection Climate Science for a Sustainable Energy Future Projects Contacts Facilities & Centers Publications Climate & Carbon Sciences Program Climate & Carbon Sciences Program The global carbon cycle strongly regulates earth's climate, while anthropogenic disturbance of the carbon cycle is the main cause of current and predicted climate change. At the same time, humans depend on the terrestrial carbon cycle for food, fiber, energy, and pharmaceuticals. The Climate and Carbon Sciences Program of the Earth Sciences Division at Lawrence Berkeley National Laboratory encompasses both atmospheric and

143

Atmospheric Carbon Dioxide and the Global Carbon Cycle: The Key Uncertainties  

DOE R&D Accomplishments (OSTI)

The biogeochemical cycling of carbon between its sources and sinks determines the rate of increase in atmospheric CO{sub 2} concentrations. The observed increase in atmospheric CO{sub 2} content is less than the estimated release from fossil fuel consumption and deforestation. This discrepancy can be explained by interactions between the atmosphere and other global carbon reservoirs such as the oceans, and the terrestrial biosphere including soils. Undoubtedly, the oceans have been the most important sinks for CO{sub 2} produced by man. But, the physical, chemical, and biological processes of oceans are complex and, therefore, credible estimates of CO{sub 2} uptake can probably only come from mathematical models. Unfortunately, one- and two-dimensional ocean models do not allow for enough CO{sub 2} uptake to accurately account for known releases. Thus, they produce higher concentrations of atmospheric CO{sub 2} than was historically the case. More complex three-dimensional models, while currently being developed, may make better use of existing tracer data than do one- and two-dimensional models and will also incorporate climate feedback effects to provide a more realistic view of ocean dynamics and CO{sub 2} fluxes. The instability of current models to estimate accurately oceanic uptake of CO{sub 2} creates one of the key uncertainties in predictions of atmospheric CO{sub 2} increases and climate responses over the next 100 to 200 years.

Peng, T. H.; Post, W. M.; DeAngelis, D. L.; Dale, V. H.; Farrell, M. P.

1987-12-00T23:59:59.000Z

144

Event:Second Global Conference on Agriculture, Food Security and Climate  

Open Energy Info (EERE)

Conference on Agriculture, Food Security and Climate Conference on Agriculture, Food Security and Climate Change Jump to: navigation, search Calendar.png Second Global Conference on Agriculture, Food Security and Climate Change: on 2012/09/03 "Co-organized by Viet Nam and the Netherlands, in close collaboration with other partners, including FAO and the World Bank, the conference will allow global leaders, practitioners, scientists, civil society and the private sector to share experiences and demonstrate how early action on how Climate-Smart Agriculture can act as a driver of green growth." Event Details Name Second Global Conference on Agriculture, Food Security and Climate Change Date 2012/09/03 Location Hanoi, Vietnam Tags LEDS, training, CLEAN Website Event Website Ret LikeLike UnlikeLike You like this.Sign Up to see what your friends like.

145

The Annual Cycle of the Energy Budget. Part I: Global Mean and Land–Ocean Exchanges  

Science Conference Proceedings (OSTI)

The mean and annual cycle of energy flowing into the climate system and its storage, release, and transport in the atmosphere, ocean, and land surface are estimated with recent observations. An emphasis is placed on establishing internally ...

John T. Fasullo; Kevin E. Trenberth

2008-05-01T23:59:59.000Z

146

A Political Ecology of “Water in Mind”: Attributing Perceptions in the Era of Global Climate Change  

Science Conference Proceedings (OSTI)

This article explores how researchers can apply social science methods and theoretical frames to capture how place-based communities are perceiving and responding to the immediate effects of global climate change. The study focuses on research ...

Susan A. Crate

2011-07-01T23:59:59.000Z

147

Global Data on Land Surface Parameters from NOAA AVHRR for Use in Numerical Climate Models  

Science Conference Proceedings (OSTI)

This paper reviews satellite datasets from the NOAA Advanced Very High Resolution Radiometer that could be employed in support of numerical climate modeling at regional and global scales. Presently available NOAA operational and research datasets ...

G. Garik Gutman

1994-05-01T23:59:59.000Z

148

Improved Ground Hydrology Calculations for Global Climate Models (GCMs): Soil Water Movement and Evapotranspiration  

Science Conference Proceedings (OSTI)

A physically based ground hydrology model is developed to improve the land-surface sensible and latent heat calculations in global climate models (GCMs). The processes of transpiration, evaporation from intercepted precipitation and dew, ...

F. Abramopoulos; C. Rosenzweig; B. Choudhury

1988-09-01T23:59:59.000Z

149

The Effect of Eurasian Snow Cover on Regional and Global Climate Variations  

Science Conference Proceedings (OSTI)

The sensitivity of the global climate system to interannual variability of he Eurasian snow cover has been investigated with numerical models. It was found that heavier than normal Eurasian snow cover in spring leads to a “poor” monsoon over ...

T. P. Barnett; L. Dümenil; U. Schlese; E. Roeckner; M. Latif

1989-03-01T23:59:59.000Z

150

Equatorial Circulation of a Global Ocean Climate Model with Anisotropic Horizontal Viscosity  

Science Conference Proceedings (OSTI)

Horizontal momentum flux in a global ocean climate model is formulated as an anisotropic viscosity with two spatially varying coefficients. This friction can be made purely dissipative, does not produce unphysical torques, and satisfies the ...

William G. Large; Gokhan Danabasoglu; James C. McWilliams; Peter R. Gent; Frank O. Bryan

2001-02-01T23:59:59.000Z

151

Amazonian Deforestation: Impact of Global Warming on the Energy Balance and Climate  

Science Conference Proceedings (OSTI)

A coupled biosphere–atmosphere statistical–dynamical model is used to study the relative roles of the impact of the land change caused by tropical deforestation and global warming on energy balance and climate. Three experiments were made: 1) ...

E. C. Moraes; Sergio H. Franchito; V. Brahmananda Rao

2013-03-01T23:59:59.000Z

152

An Analysis of Convectively Coupled Kelvin Waves in 20 WCRP CMIP3 Global Coupled Climate Models  

Science Conference Proceedings (OSTI)

Output from 20 coupled global climate models is analyzed to determine whether convectively coupled Kelvin waves exist in the models, and, if so, how their horizontal and vertical structures compare to observations. Model data are obtained from ...

Katherine H. Straub; Patrick T. Haertel; George N. Kiladis

2010-06-01T23:59:59.000Z

153

Climate Simulations With NCAR CCM2 Forced by Global Sea Surface Temperature, 1950–89  

Science Conference Proceedings (OSTI)

A 40-yr integration is conducted using the National Center for Atmospheric Research (NCAR) Community Climate Model Version 2 (CCM2). The simulation was forced by observed monthly global sea surface temperature (SST) changes during 1950–89. The ...

C-Y. J. Kao; A. Quintanar; M. J. Newman; W. Eichinger; D. L. Langley; S-C. Chen

1996-12-01T23:59:59.000Z

154

Tropical Cyclone Climatology in a 10-km Global Atmospheric GCM: Toward Weather-Resolving Climate Modeling  

Science Conference Proceedings (OSTI)

Northern Hemisphere tropical cyclone (TC) activity is investigated in multiyear global climate simulations with the ECMWF Integrated Forecast System (IFS) at 10-km resolution forced by the observed records of sea surface temperature and sea ice. ...

Julia V. Manganello; Kevin I. Hodges; James L. Kinter III; Benjamin A. Cash; Lawrence Marx; Thomas Jung; Deepthi Achuthavarier; Jennifer M. Adams; Eric L. Altshuler; Bohua Huang; Emilia K. Jin; Cristiana Stan; Peter Towers; Nils Wedi

2012-06-01T23:59:59.000Z

155

Southern Ocean Response to Strengthening Winds in an Eddy-Permitting Global Climate Model  

Science Conference Proceedings (OSTI)

A global climate model with horizontal resolutions in the ocean ranging from relatively coarse to eddy permitting is used to investigate the resolution dependence of the Southern Ocean response to poleward intensifying winds through the past and ...

Paul Spence; John C. Fyfe; Alvaro Montenegro; Andrew J. Weaver

2010-10-01T23:59:59.000Z

156

Efficient Three-Dimensional Global Models for Climate Studies: Models I and II  

Science Conference Proceedings (OSTI)

A global atmospheric model is developed with a computational efficiency which allows long-range climate experiments. The model solves the simultaneous equations for conservation of mass, energy and momentum, and the equation of state on a grid. ...

J. Hansen; G. Russell; D. Rind; P. Stone; A. Lacis; S. Lebedeff; R. Ruedy; L. Travis

1983-04-01T23:59:59.000Z

157

A Bayesian Assessment of Climate Change Using Multimodel Ensembles. Part I: Global Mean Surface Temperature  

Science Conference Proceedings (OSTI)

A Bayesian approach is applied to the observed global surface air temperature (SAT) changes using multimodel ensembles (MMEs) of the Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report (AR4) simulations and single-model ...

Seung-Ki Min; Andreas Hense

2006-07-01T23:59:59.000Z

158

Sensitivity of Global Tropical Climate to Land Surface Processes: Mean State and Interannual Variability  

Science Conference Proceedings (OSTI)

This study examines the sensitivity of the global climate to land surface processes (LSP) using an atmospheric general circulation model both uncoupled (with prescribed SSTs) and coupled to an oceanic general circulation model. The emphasis is on ...

Hsi-Yen Ma; Heng Xiao; C. Roberto Mechoso; Yongkang Xue

2013-03-01T23:59:59.000Z

159

A Global Database of Land Surface Parameters at 1-km Resolution in Meteorological and Climate Models  

Science Conference Proceedings (OSTI)

Ecoclimap, a new complete surface parameter global dataset at a 1-km resolution, is presented. It is intended to be used to initialize the soil–vegetation–atmosphere transfer schemes (SVATs) in meteorological and climate models (at all horizontal ...

Valéry Masson; Jean-Louis Champeaux; Fabrice Chauvin; Christelle Meriguet; Roselyne Lacaze

2003-05-01T23:59:59.000Z

160

System Design and Evaluation of Coupled Ensemble Data Assimilation for Global Oceanic Climate Studies  

Science Conference Proceedings (OSTI)

A fully coupled data assimilation (CDA) system, consisting of an ensemble filter applied to the Geophysical Fluid Dynamics Laboratory’s global fully coupled climate model (CM2), has been developed to facilitate the detection and prediction of ...

S. Zhang; M. J. Harrison; A. Rosati; A. Wittenberg

2007-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "global climate cycle" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Sensitivity of a GCM Simulation of Global Climate to the Representation of Land-Surface Hydrology  

Science Conference Proceedings (OSTI)

The sensitivity of global climate to the characterization of the land-surface hydrology is investigated using the Geophysical Fluid Dynamics Laboratory GCM at R15 resolution with the standard Budyko bucket and the Variable Infiltration Capacity (...

John F. Stamm; Eric F. Wood; Dennis P. Lettenmaier

1994-08-01T23:59:59.000Z

162

Global Climate and Ocean Circulation on an Aquaplanet Ocean–Atmosphere General Circulation Model  

Science Conference Proceedings (OSTI)

A low-resolution coupled ocean–atmosphere general circulation model (OAGCM) is used to study the characteristics of the large-scale ocean circulation and its climatic impacts in a series of global coupled aquaplanet experiments. Three ...

Robin S. Smith; Clotilde Dubois; Jochem Marotzke

2006-09-01T23:59:59.000Z

163

GLOBAL CLIMATE CHANGE: SOME IMPLICATIONS, OPPORTUNITIES. AND CHALLENGES FOR U.S. FORESTRY  

NLE Websites -- All DOE Office Websites (Extended Search)

GLOBAL CLIMATE CHANGE: SOME IMPLICATIONS, OPPORTUNITIES. GLOBAL CLIMATE CHANGE: SOME IMPLICATIONS, OPPORTUNITIES. AND CHALLENGES FOR U.S. FORESTRY G. Marland' Ahsiract.--It is widcly agrccd that thc concentration of greenhouse gases in the earth's atmosphcrc is increasing, that this increase is a consequence of man's activities, and that there is signilicant risk that this will lead to changes in the earth's climate. T h c qucstion is now k i n g discusscd what, if anything, we should be doing to minimize and/or adapt to changes in climate. Virtually evcry statcmcnt on this matter; from the G.S. Oflice of Tcchnology Assessment. to the National Acadcmy of Science, to the Nairobi Declaration on Climatic Change. includes some recommendation for planting and protecting forests. In fact, forestry is intimately involved in the climate change

164

Vegetation Feedbacks to Climate in the Global Monsoon Regions Michael Notaro *, Guangshan Chen, Zhengyu Liu  

E-Print Network (OSTI)

1 Vegetation Feedbacks to Climate in the Global Monsoon Regions Michael Notaro *, Guangshan across six monsoon regions with a fully coupled atmosphere-ocean-ice-land model with dynamic vegetation monsoon regions is reduced and the climatic response assessed. Consistent responses among the regions

Wisconsin at Madison, University of

165

The Effect of a Solar Perturbation on a Global Climate Model  

Science Conference Proceedings (OSTI)

A quasi-three-dimensional global climate model is used to study the effect of a transient change in solar radiation on the model's climate. The solar constant is decreased abruptly by 5 percent in the 10th year of a 50-year run. It is then ...

William D. Sellers

1985-08-01T23:59:59.000Z

166

U.S. Greenhouse Gas Intensity and the Global Climate Change Initiative (released in AEO2006)  

Reports and Publications (EIA)

On February 14, 2002, President Bush announced the Administrations Global Climate Change Initiative [80]. A key goal of the Climate Change Initiative is to reduce U.S. GHG intensitydefined as the ratio of total U.S. GHG emissions to economic outputby 18 percent over the 2002 to 2012 time frame.

Information Center

2006-02-01T23:59:59.000Z

167

The GISS Global Climate-Middle Atmosphere Model. Part I: Model Structure and Climatology  

Science Conference Proceedings (OSTI)

The GISS global climate model (Hansen et al.) has been extended to include the middle atmosphere up to an altitude of approximately 85 km. The model has the full array of processes used for climate research, i.e., numerical solutions of the ...

D. Rind; R. Suozzo; N. K. Balachandran; A. Lacis; G. Russell

1988-02-01T23:59:59.000Z

168

Marine methane cycle simulations for the period of early global warming  

Science Conference Proceedings (OSTI)

Geochemical environments, fates, and effects are modeled for methane released into seawater by the decomposition of climate-sensitive clathrates. A contemporary global background cycle is first constructed, within the framework of the Parallel Ocean Program. Input from organics in the upper thermocline is related to oxygen levels, and microbial consumption is parameterized from available rate measurements. Seepage into bottom layers is then superimposed, representing typical seabed fluid flow. The resulting CH{sub 4} distribution is validated against surface saturation ratios, vertical sections, and slope plume studies. Injections of clathrate-derived methane are explored by distributing a small number of point sources around the Arctic continental shelf, where stocks are extensive and susceptible to instability during the first few decades of global warming. Isolated bottom cells are assigned dissolved gas fluxes from porous-media simulation. Given the present bulk removal pattern, methane does not penetrate far from emission sites. Accumulated effects, however, spread to the regional scale following the modeled current system. Both hypoxification and acidification are documented. Sensitivity studies illustrate a potential for material restrictions to broaden the perturbations, since methanotrophic consumers require nutrients and trace metals. When such factors are considered, methane buildup within the Arctic basin is enhanced. However, freshened polar surface waters act as a barrier to atmospheric transfer, diverting products into the deep return flow. Uncertainties in the logic and calculations are enumerated including those inherent in high-latitude clathrate abundance, buoyant effluent rise through the column, representation of the general circulation, and bacterial growth kinetics.

Elliott, S.; Maltrud, M.; Reagan, M.T.; Moridis, G.J.; Cameron-Smith, P.J.

2011-01-02T23:59:59.000Z

169

Long-Term Climate Commitments Projected with Climate–Carbon Cycle Models  

Science Conference Proceedings (OSTI)

Eight earth system models of intermediate complexity (EMICs) are used to project climate change commitments for the recent Intergovernmental Panel on Climate Change’s (IPCC’s) Fourth Assessment Report (AR4). Simulations are run until the year ...

G.-K. Plattner; R. Knutti; F. Joos; T. F. Stocker; W. von Bloh; V. Brovkin; D. Cameron; E. Driesschaert; S. Dutkiewicz; M. Eby; N. R. Edwards; T. Fichefet; J. C. Hargreaves; C. D. Jones; M. F. Loutre; H. D. Matthews; A. Mouchet; S. A. Müller; S. Nawrath; A. Price; A. Sokolov; K. M. Strassmann; A. J. Weaver

2008-06-01T23:59:59.000Z

170

Microsoft PowerPoint - 6_Rowe-Future Challenges for Global Fuel Cycle Material Accounting Final_Updated.pptx  

National Nuclear Security Administration (NNSA)

Future Challenges Future Challenges for Global Fuel Cycle Material Accounting Nathan Rowe Chris Pickett Oak Ridge National Laboratory Nuclear Materials Management & Safeguards System Users Annual Training Meeting May 20-23, 2013 St. Louis, Missouri 2 Future Challenges for Global Fuel Cycle Material Accounting Introduction * Changing Nuclear Fuel Cycle Activities * Nuclear Security Challenges * How to Respond? - Additional Protocol - State-Level Concept - Continuity of Knowledge * Conclusion 3 Future Challenges for Global Fuel Cycle Material Accounting Nuclear Fuel Cycle Source: International Atomic Energy Agency (IAEA), Nuclear Fuel Cycle Information System (NFCIS) web site IAEA Safeguards Begins Here 4 Future Challenges for Global Fuel Cycle Material Accounting Nuclear Weapons Cycle Conversion

171

Impact of Heavy Duty Vehicle Emissions Reductions on Global Climate  

Science Conference Proceedings (OSTI)

The impact of a specified set of emissions reductions from heavy duty vehicles on climate change is calculated using the MAGICC 5.3 climate model. The integrated impact of the following emissions changes are considered: CO2, CH4, N2O, VOC, NOx, and SO2. This brief summarizes the assumptions and methods used for this calculation.

Calvin, Katherine V.; Thomson, Allison M.

2010-08-01T23:59:59.000Z

172

Simulated Diurnal Range and Variability of Surface Temperature in a Global Climate Model for Present and Doubled C02 Climates  

Science Conference Proceedings (OSTI)

The variability of surface temperature simulated by a global climate model with a simple mixed-layer ocean is analyzed. The simulated diurnal and seasonal ranges of temperature are compared with observation, as is the day-to-day and interannual ...

Hong Xing Cao; J. F. B. Mitchell; J. R. Lavery

1992-09-01T23:59:59.000Z

173

Projected Impact of Climate Change on the Energy Budget of the Arctic Ocean by a Global Climate Model  

Science Conference Proceedings (OSTI)

The annual energy budget of the Arctic Ocean is characterized by a net heat loss at the air–sea interface that is balanced by oceanic heat transport into the Arctic. Two 150-yr simulations (1950–2099) of a global climate model are used to examine ...

James R. Miller; Gary L. Russell

2002-11-01T23:59:59.000Z

174

Changes in the Amplitude of the Temperature Annual Cycle in China and Their Implication for Climate Change Research  

Science Conference Proceedings (OSTI)

Climate change is not only reflected in the changes in annual means of climate variables but also in the changes in their annual cycles (seasonality), especially in the regions outside the tropics. In this study, the ensemble empirical mode ...

Cheng Qian; Congbin Fu; Zhaohua Wu

2011-10-01T23:59:59.000Z

175

Hawaii-bound in search of global climate data | Argonne National Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

Hawaii-bound in search of global climate data Hawaii-bound in search of global climate data By Brian Grabowski * September 13, 2013 Tweet EmailPrint While the idea of a cruise to Hawaii may sound like paradise, making that same journey 25 times back and forth in a year might start to lose its appeal. But for a climate data-gathering machine called AMF2, perched aboard the ship, every trip is a chance to gather more data that is critical to understanding the Pacific Ocean's role in the global climate. The machine is the Department of Energy's second Atmospheric Radiation Measurement (ARM) mobile facility, operated and managed by Argonne scientists. It carries a suite of instruments to measure properties of clouds, the ocean, precipitation, aerosols, and radiation. Over the summer of 2013, the AMF2 traveled back and forth between Hawaii and Los Angeles,

176

Development Testing of the Global Climate Model CESM/CAM | Argonne  

NLE Websites -- All DOE Office Websites (Extended Search)

Development Testing of the Global Climate Model CESM/CAM Development Testing of the Global Climate Model CESM/CAM Event Sponsor: Argonne Leadership Computing Facility Seminar Start Date: Dec 16 2013 - 10:30am Building/Room: Building 240/Room 4301 Location: Argonne National Laboratory Speaker(s): Chris A. Fischer Speaker(s) Title: National Center for Atmospheric Research The Community Earth System Model (CESM) and Community Atmosphere Model (CAM) are community models involving several different developers. With so many different developers it becomes imperative to carry out continuous testing during development. I'll provide a brief introduction to CESM and CAM then cover the testing that is being carried out on both. The Community Earth System Model (CESM) is a global climate model used to predict past, present and future climates. CESM is a fully couple model,

177

GFDL's CM2 Global Coupled Climate Models. Part IV: Idealized Climate Response  

Science Conference Proceedings (OSTI)

The climate response to idealized changes in the atmospheric CO2 concentration by the new GFDL climate model (CM2) is documented. This new model is very different from earlier GFDL models in its parameterizations of subgrid-scale physical ...

R. J. Stouffer; A. J. Broccoli; T. L. Delworth; K. W. Dixon; R. Gudgel; I. Held; R. Hemler; T. Knutson; Hyun-Chul Lee; M. D. Schwarzkopf; B. Soden; M. J. Spelman; M. Winton; Fanrong Zeng

2006-03-01T23:59:59.000Z

178

California Wintertime Precipitation Bias in Regional and Global Climate Models  

Science Conference Proceedings (OSTI)

In this paper, wintertime precipitation from a variety of observational datasets, regional climate models (RCMs), and general circulation models (GCMs) is averaged over the state of California and compared. Several averaging methodologies are ...

Peter Caldwell

2010-10-01T23:59:59.000Z

179

Interactive chemistry and climate models in global change studies  

E-Print Network (OSTI)

Continually increasing atmospheric concentrations of radiatively important chemical species such as CO2, CH4, N2O, tropospheric O3, and certain halocarbons most likely will cause future climate changes, which could in turn ...

Wang, Chien.; Prinn, Ronald G.

180

Vegetation Feedbacks to Climate in the Global Monsoon Regions  

Science Conference Proceedings (OSTI)

Vegetation feedbacks on climate, on the subannual time scale, are examined across six monsoon regions with a fully coupled atmosphere–ocean–ice–land model with dynamic vegetation. Initial value ensemble experiments are run in which the total ...

Michael Notaro; Guangshan Chen; Zhengyu Liu

2011-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "global climate cycle" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Long-Term Climate Modeling and Hydrological Response to Climate Cycles in the Yucca Mountain Region  

Science Conference Proceedings (OSTI)

Climate and its influence on hydrological conditions are important considerations in the evaluation of the Yucca Mountain (YM) site as a geologic repository for disposal of U.S. commercial spent nuclear fuel and defense high level radioactive wastes. This report updates previous EPRI studies (reports 1013445 and 1015045), which produced a quantitative and paleo-climate-calibrated/verified model of how climate, infiltration, and YM flow properties might appear in the future. The studies also supported ass...

2009-06-30T23:59:59.000Z

182

Carbon Cycle Uncertainty Increases Climate Change Risks and Mitigation Challenges  

Science Conference Proceedings (OSTI)

Projections of greenhouse gas concentrations over the twenty-first century generally rely on two optimistic, but questionable, assumptions about the carbon cycle: 1) that elevated atmospheric CO2 concentrations will enhance terrestrial carbon ...

Paul A. T. Higgins; John Harte

2012-11-01T23:59:59.000Z

183

Comparison of explicitly simulated and downscaled tropical cyclone activity in a high-resolution global climate model  

E-Print Network (OSTI)

The response of tropical cyclone activity to climate change is a matter of great inherent interest and practical importance. Most current global climate models are not, however, capable of adequately resolving tropical ...

Emanuel, Kerry Andrew

184

Effect of Ice-Albedo Feedback on Global Sensitivity in a One-Dimensional Radiative-Convective Climate Model  

Science Conference Proceedings (OSTI)

The feedback between ice albedo and temperature is included in a one-dimensional radiative-convective climate model. The effect of this feedback on global sensitivity to changes in solar constant is studied for the current climate conditions. ...

Wei-Chyung Wang; Peter H. Stone

1980-03-01T23:59:59.000Z

185

Emission-Induced Nonlinearities in the Global Aerosol System: Results from the ECHAM5-HAM Aerosol-Climate Model  

Science Conference Proceedings (OSTI)

In a series of simulations with the global ECHAM5-HAM aerosol-climate model, the response to changes in anthropogenic emissions is analyzed. Traditionally, additivity is assumed in the assessment of the aerosol climate impact, as the underlying ...

Philip Stier; Johann Feichter; Silvia Kloster; Elisabetta Vignati; Julian Wilson

2006-08-01T23:59:59.000Z

186

Simulating past and future dynamics of natural ecosystems in the United States. Global Biogeochemical Cycles 17(2)1045  

E-Print Network (OSTI)

[1] Simulations of potential vegetation distribution, natural fire frequency, carbon pools, and fluxes are presented for two DGVMs (Dynamic Global Vegetation Models) from the second phase of the Vegetation/Ecosystem Modeling and Analysis Project. Results link vegetation dynamics to biogeochemical cycling for the conterminous United States. Two climate change scenarios were used: a moderately warm scenario from the Hadley Climate Centre and a warmer scenario from the Canadian Climate Center. Both include sulfate aerosols and assume a gradual CO2 increase. Both DGVMs simulate a reduction of southwestern desert areas, a westward expansion of eastern deciduous forests, and the expansion of forests in the western part of the Pacific Northwest and in north-central California. Both DGVMs predict an increase in total biomass burnt in the next century, with a more pronounced increase under the Canadian scenario. Under the Hadley scenario, both DGVMs simulate increases in total carbon stocks. Under the Canadian scenario, both DGVMs simulate a decrease in live vegetation carbon. We identify similarities in model behavior due to the climate forcing and explain differences by the different structure of the models and their different sensitivity to

Dominique Bachelet; Ronald P. Neilson; Thomas Hickler; Raymond J. Drapek; James M. Lenihan; Martin T. Sykes; Benjamin Smith; Stephen Sitch; Kirsten Thonicke

2003-01-01T23:59:59.000Z

187

Local Implications of Globally Restricted Mobility: A study of Queenstown’s vulnerability to peak oil and climate change.  

E-Print Network (OSTI)

??This thesis employs a case study approach to investigate local implications of globally restricted mobility by examining Queenstown’s vulnerability to peak oil and climate change.… (more)

Walsh, Tim

2011-01-01T23:59:59.000Z

188

Global p-mode oscillations throughout the complete solar cycle 23 and the beginning of cycle 24  

E-Print Network (OSTI)

The parameters of the p-mode oscillations vary with solar activity. Such temporal variations provide insights for the study of the structural and dynamical changes occurring in the Sun's interior throughout the solar cycle. We present here a complete picture of the temporal variations of the global p-mode parameters (excitation, damping, frequency, peak asymmetry, and rotational splitting) over the entire solar cycle 23 and the beginning of cycle 24 as observed by the space-based, Sun-as-a-star helioseismic GOLF and VIRGO instruments onboard SoHO.

Salabert, David; Palle, Pere L; Jimenez, Antonio

2010-01-01T23:59:59.000Z

189

Detection of the Climate Response to the Solar Cycle  

Science Conference Proceedings (OSTI)

Optimal space–time signal processing is used to infer the amplitude of the large-scale, near-surface temperature response to the, “11 year” solar cycle. The estimation procedure involves the following stops. 1) By correlating 14 years of monthly ...

Mark J. Stevens; Gerald R. North

1996-09-01T23:59:59.000Z

190

A Global Profiling System for Improved Weather and Climate Prediction  

Science Conference Proceedings (OSTI)

A new long-term global observing system is proposed that would provide routine, detailed vertical profiles of measurements in the atmosphere and oceans. The system, which would need to be designed, developed, and operated by a consortium of ...

Alexander E. MacDonald

2005-12-01T23:59:59.000Z

191

Identifying Signatures of Natural Climate Variability in Time Series of Global-Mean Surface Temperature: Methodology and Insights  

Science Conference Proceedings (OSTI)

Global-mean surface temperature is affected by both natural variability and anthropogenic forcing. This study is concerned with identifying and removing from global-mean temperatures the signatures of natural climate variability over the period ...

David W. J. Thompson; John M. Wallace; Phil D. Jones; John J. Kennedy

2009-11-01T23:59:59.000Z

192

U.S. Greenhouse Gas Intensity and the Global Climate Change Initiative (released in AEO2005)  

Reports and Publications (EIA)

On February 14, 2002, President Bush announced the Administrations Global Climate Change Initiative [91]. A key goal of the Climate Change Initiative is to reduce U.S. greenhouse gas intensity by 18 percent over the 2002 to 2012 time frame. For the purposes of the initiative, greenhouse gas intensity is defined as the ratio of total U.S. greenhouse gas emissions to economic output.

Information Center

2005-02-01T23:59:59.000Z

193

Regional carbon dynamics in monsoon Asia and its implications for the global carbon cycle  

E-Print Network (OSTI)

Regional carbon dynamics in monsoon Asia and its implications for the global carbon cycle Hanqin on the exchange of CO2 between the atmosphere and monsoon Asian ecosystems. During 1860­1990, modeled results suggest that monsoon Asia as a whole released 29.0 Pg C, which represents 50% of the global carbon release

194

22nd Conference on Hydrology A Satellite View of Global Water and Energy Cycling  

E-Print Network (OSTI)

Water and Energy Cycling (2008 - 88Annual_22hydro) 2/6/2008http://ams.confex.com/ams/88Annual22nd Conference on Hydrology 8.1 A Satellite View of Global Water and Energy Cycling Paul R. Houser in modeling capability, satellite observations have great potential to make huge advances in water and energy

Houser, Paul R.

195

Greenhouse effect and the global climate. (Latest citations from the Aerospace database). Published Search  

SciTech Connect

The bibliography contains citations concerning terrestrial climatic changes known as the greenhouse effect. The greenhouse effect is an accumulation of carbon dioxide and other gases that retain solar-induced heat, thereby increasing the average global temperature. Modeling studies, measurements of atmospheric gases, pollutants and temperatures, studies of climatic records for occurrence of similar changes (paleoclimatology), prediction of environmental changes due to the greenhouse effect, government energy policy as a result of possible climate change, and the contributions of manmade and natural pollutants to the greenhouse effect are among the topics discussed. (Contains a minimum of 52 citations and includes a subject term index and title list.)

1993-09-01T23:59:59.000Z

196

Experiences from Simulating the Global Carbon Cycle in a Grid Computing Environment, The Fourteenth Global Grid Forum (GGF 14),Chicago  

E-Print Network (OSTI)

Abstract. We discuss our software development experiences with Grid-BGC, a gridenabled terrestrial carbon cycle modeling environment. Grid-BGC leverages grid computing technologies to create a secure, reliable and easy to use distributed computational environment for climate modeling. The goal is to develop a system which insulates the scientists from tedious configuration details thereby increasing scientific productivity. This project is part of a collaborative effort between the

Jason Cope; Craig Hartsough; Sean Mccreary; Peter Thornton; Henry M. Tufo; Nathan Wilhelmi; Matthew Woitaszek

2005-01-01T23:59:59.000Z

197

An Extended Solar Cycle 23 with Deep Minimum Transition to Cycle 24: Assessments and Climatic Ramifications  

Science Conference Proceedings (OSTI)

The extended length of solar cycle 23 and the associated deep quiet period (QP) between cycles 23 and 24 have been examined using the international sunspot record from 1755 to 2010. This study has also introduced a QP definition based on a (...

Ernest M. Agee; Emily Cornett; Kandace Gleason

2010-11-01T23:59:59.000Z

198

Climate Drift in a Global Ocean General Circulation Model  

Science Conference Proceedings (OSTI)

A global version of the GFDL modular ocean model is forced using conventional restoring boundary conditions (BCs), mixed BCs (i.e., restoring the upper-level temperature but specifying a fixed salt flux), and stochastic fluxes of both heat and ...

Scott B. Power

1995-06-01T23:59:59.000Z

199

Effects of cloudy/clear air mixing and droplet pH on sulfate aerosol formation in a coupled chemistry/climate global model  

Science Conference Proceedings (OSTI)

In this paper we will briefly describe our coupled ECHAM/GRANTOUR model, provide a detailed description of our atmospheric chemistry parameterizations, and discuss a couple of numerical experiments in which we explore the influence of assumed pH and rate of mixing between cloudy and clear air on aqueous sulfate formation and concentration. We have used our tropospheric chemistry and transport model, GRANTOUR, to estimate the life cycle and global distributions of many trace species. Recently, we have coupled GRANTOUR with the ECHAM global climate model, which provides several enhanced capabilities in the representation of aerosol interactions.

Molenkamp, C.R.; Atherton, C.A. [Lawrence Livermore National Lab., CA (United States); Penner, J.E.; Walton, J.J. [Michigan Univ., Ann Arbor, MI (United States). Dept. of Atmospheric, Oceanic and Space Sciences

1996-10-01T23:59:59.000Z

200

Sustainable biochar to mitigate global climate change: Supplementary information  

E-Print Network (OSTI)

S1 Supporting Information for: "Life cycle assessment of biochar systems: Estimating the energetic Feedstock transport to the pyrolysis facility S6 Biomass pre-processing S6 Slow pyrolysis: Biochar and syngas production S7 Field application of biochar S9 Improved fertilizer use efficiency S10 Soil N2O

Lehmann, Johannes

Note: This page contains sample records for the topic "global climate cycle" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

EVALUATING THE LAND AND OCEAN COMPONENTS OF THE GLOBAL CARBON CYCLE IN THE CMIP5 EARTH SYSTEM MODELS  

Science Conference Proceedings (OSTI)

We assess the ability of 18 Earth System Models to simulate the land and ocean carbon cycle for the present climate. These models will be used in the next Intergovernmental Panel on Climate Change (IPCC) Fifth Assessment Report (AR5) for climate ...

A. Anav; P. Friedlingstein; M. Kidston; L. Bopp; P. Ciais; P. Cox; C. Jones; M. Jung; R. Myneni; Z. Zhu

202

Global situational awareness and early warning of high-consequence climate change.  

SciTech Connect

Global monitoring systems that have high spatial and temporal resolution, with long observational baselines, are needed to provide situational awareness of the Earth's climate system. Continuous monitoring is required for early warning of high-consequence climate change and to help anticipate and minimize the threat. Global climate has changed abruptly in the past and will almost certainly do so again, even in the absence of anthropogenic interference. It is possible that the Earth's climate could change dramatically and suddenly within a few years. An unexpected loss of climate stability would be equivalent to the failure of an engineered system on a grand scale, and would affect billions of people by causing agricultural, economic, and environmental collapses that would cascade throughout the world. The probability of such an abrupt change happening in the near future may be small, but it is nonzero. Because the consequences would be catastrophic, we argue that the problem should be treated with science-informed engineering conservatism, which focuses on various ways a system can fail and emphasizes inspection and early detection. Such an approach will require high-fidelity continuous global monitoring, informed by scientific modeling.

Backus, George A.; Carr, Martin J.; Boslough, Mark Bruce Elrick

2009-08-01T23:59:59.000Z

203

Comparison of Arctic Climate Simulations by Uncoupled and Coupled Global Models  

Science Conference Proceedings (OSTI)

Simulations of present-day Arctic climate are assessed from suites of 1) 13 global atmosphere-only models from the Atmospheric Model Intercomparison Project (AMIP-II) and 2) 8 coupled atmosphere–ocean–ice models from the Data Distribution Center ...

John E. Walsh; Vladimir M. Kattsov; William L. Chapman; Veronika Govorkova; Tatyana Pavlova

2002-06-01T23:59:59.000Z

204

High resolution simulation of the South Asian monsoon using a variable resolution global climate model  

E-Print Network (OSTI)

High resolution simulation of the South Asian monsoon using a variable resolution global climate understand regional aspects of the South Asian monsoon rainfall distribution and the interactions between monsoon circulation and precipitation. For this purpose, two sets of ten member realizations are produced

Hourdin, Chez Frédéric

205

Estimating future global per capita water availability based on changes in climate and population  

E-Print Network (OSTI)

and Develop- ment (LDRD) Program and the Climate Change Science Institute (CCSI) of the Oak Ridge National Sciences Division, Oak Ridge National Laboratory (ORNL), Oak Ridge, TN 37831, USA b Civil and Environmental for each basin using the following approach: ORNL's Global LandScan 2007 product described in Section 2

Minnesota, University of

206

Global Modes of Sea Surface Temperature Variability in Relation to Regional Climate Indices  

Science Conference Proceedings (OSTI)

A century-long EOF analysis of global sea surface temperature (SST) was carried out and the first six modes, independent by construction, were found to be associated with well-known regional climate phenomena: the El Nińo–Southern Oscillation (...

Monique Messié; Francisco Chavez

2011-08-01T23:59:59.000Z

207

Satellite Instrument Calibration for Measuring Global Climate Change: Report of a Workshop  

Science Conference Proceedings (OSTI)

Measuring the small changes associated with long-term global climate change from space is a daunting task. The satellite instruments must be capable of observing atmospheric and surface temperature trends as small as 0.1°C decade?1, ozone changes ...

George Ohring; Bruce Wielicki; Roy Spencer; Bill Emery; Raju Datla

2005-09-01T23:59:59.000Z

208

Evidence for a Rapid Global Climate Shift across the Late 1960s  

Science Conference Proceedings (OSTI)

It is shown that a number of important characteristics of the global atmospheric circulation and climate changed in a near-monotonic fashion over the decade, or less, centered on the late 1960s. These changes were largest or commonest in tropical ...

Peter G. Baines; Chris K. Folland

2007-06-01T23:59:59.000Z

209

Effects of Urban Surfaces and White Roofs on Global and Regional Climate  

Science Conference Proceedings (OSTI)

Land use, vegetation, albedo, and soil-type data are combined in a global model that accounts for roofs and roads at near their actual resolution to quantify the effects of urban surface and white roofs on climate. In 2005, ~0.128% of the ...

Mark Z. Jacobson; John E. Ten Hoeve

2012-02-01T23:59:59.000Z

210

Global simulations of smoke from Kuwaiti oil fires and possible effects on climate  

Science Conference Proceedings (OSTI)

The Los Alamos Global Climate Model has bee used to simulate the global evolution of the Kuwaiti oil fire smoke and its potential effects on the climate. The initial simulations were done shortly before the fires were lit in January 1991. They indicated that such an event would not result in a ``Mini Nuclear Winter`` as some people were suggesting. Further simulations during the year suggested that the smoke could be responsible for subtle regional climate changes in the spring such as a 5 degree centigrade decrease in the surface temperature in Kuwait, a 10% decrease in precipitation in Saudi Arabia and a 10% increase in precipitation in the Tibetan Plateau region. These results are in qualitative agreement with the observations this year.

Glatzmaier, G.A.; Malone, R.C.; Kao, C.Y.J.

1991-12-31T23:59:59.000Z

211

Global simulations of smoke from Kuwaiti oil fires and possible effects on climate  

Science Conference Proceedings (OSTI)

The Los Alamos Global Climate Model has bee used to simulate the global evolution of the Kuwaiti oil fire smoke and its potential effects on the climate. The initial simulations were done shortly before the fires were lit in January 1991. They indicated that such an event would not result in a Mini Nuclear Winter'' as some people were suggesting. Further simulations during the year suggested that the smoke could be responsible for subtle regional climate changes in the spring such as a 5 degree centigrade decrease in the surface temperature in Kuwait, a 10% decrease in precipitation in Saudi Arabia and a 10% increase in precipitation in the Tibetan Plateau region. These results are in qualitative agreement with the observations this year.

Glatzmaier, G.A.; Malone, R.C.; Kao, C.Y.J.

1991-01-01T23:59:59.000Z

212

European Geosciences Union Ocean Science Formulation of an ocean model for global climate simulations  

E-Print Network (OSTI)

Abstract. This paper summarizes the formulation of the ocean component to the Geophysical Fluid Dynamics Laboratory’s (GFDL) climate model used for the 4th IPCC Assessment (AR4) of global climate change. In particular, it reviews the numerical schemes and physical parameterizations that make up an ocean climate model and how these schemes are pieced together for use in a state-of-the-art climate model. Features of the model described here include the following: (1) tripolar grid to resolve the Arctic Ocean without polar filtering, (2) partial bottom step representation of topography to better represent topographically influenced advective and wave processes, (3) more accurate equation of state, (4) three-dimensional flux limited tracer advection to reduce overshoots and undershoots, (5) incorporation of regional climatological variability in shortwave penetration,

B. L. Samuels; M. J. Spelman; M. Winton; R. Zhang

2005-01-01T23:59:59.000Z

213

A Computer-Based Atlas of Global Instrumental Climate Data (DB-1003)  

NLE Websites -- All DOE Office Websites (Extended Search)

A Computer-Based Atlas of Global Instrumental Climate Data (DB-1003) A Computer-Based Atlas of Global Instrumental Climate Data (DB-1003) DOI: 10.3334/CDIAC/cli.db1003 data Data Investigators R. S. Bradley, L. G. Ahern, and F. T. Keimig Color-shaded and contoured images of global, gridded instrumental data have been produced as a computer-based atlas. Each image simultaneously depicts anomaly maps of surface temperature, sea-level pressure, 500-mbar geopotential heights, and percentages of reference-period precipitation. Monthly, seasonal, and annual composites are available in either cylindrical equidistant or northern and southern hemisphere polar projections. Temperature maps are available from 1854 to 1991, precipitation from 1851 to 1989, sea-level pressure from 1899 to 1991, and 500-mbar heights from 1946 to 1991. The source of data for the temperature

214

Global climate change and effects on Pacific Northwest salmonids: An exploratory case study  

SciTech Connect

Recently, a number of papers have addressed global warming and freshwater fisheries. The recent report to Congress by the US Environmental Protection Agency included an analysis of potential effects of global warming on fisheries of the Great Lakes, California, and the Southeast. In California, the report stated that salinity increases in the San Francisco Bay could enhance the abundance of marine fish species, while anadromous species could be adversely affected. This paper discusses global climate changes and the effects on Pacific Northwest Salmonids. The impacts of climate change or Spring Chinook production in the Yakima Sub-basin was simulated using a computer modeling system developed for the Northwest Power planning council. 35 refs., 1 fig., 1 tab.

Shankle, S.A.

1990-09-01T23:59:59.000Z

215

GFDL’s ESM2 Global Coupled Climate–Carbon Earth System Models. Part I: Physical Formulation and Baseline Simulation Characteristics  

Science Conference Proceedings (OSTI)

The physical climate formulation and simulation characteristics of two new global coupled carbon–climate Earth System Models, ESM2M and ESM2G, are described. These models demonstrate similar climate fidelity as the Geophysical Fluid Dynamics ...

John P. Dunne; Jasmin G. John; Alistair J. Adcroft; Stephen M. Griffies; Robert W. Hallberg; Elena Shevliakova; Ronald J. Stouffer; William Cooke; Krista A. Dunne; Matthew J. Harrison; John P. Krasting; Sergey L. Malyshev; P. C. D. Milly; Peter J. Phillipps; Lori T. Sentman; Bonita L. Samuels; Michael J. Spelman; Michael Winton; Andrew T. Wittenberg; Niki Zadeh

2012-10-01T23:59:59.000Z

216

Comparison of Short-Term and Long-Term Radiative Feedbacks and Variability in Twentieth-Century Global Climate Model Simulations  

Science Conference Proceedings (OSTI)

The climate sensitivity uncertainty of global climate models (GCMs) is partly due to the spread of individual feedbacks. One approach to constrain long-term climate sensitivity is to use the relatively short observational record, assuming there ...

Meghan M. Dalton; Karen M. Shell

2013-12-01T23:59:59.000Z

217

Investigating the West African Climate System Using Global/Regional Climate Models  

Science Conference Proceedings (OSTI)

A three-day workshop took place at Howard University in Washington D.C. 27 July through 29 July 2000 to examine scientific and social issues associated with climate research in West Africa. Atmospheric scientists from West Africa and United ...

Gregory S. Jenkins; Andre Kamga; Adamou Garba; Arona Diedhiou; Vernon Morris; Everette Joseph

2002-04-01T23:59:59.000Z

218

What do people know about global climate change 1. Mental models  

SciTech Connect

A set of exploratory studies and mental model interviews was conducted in order to characterize public understanding of climate change. In general, respondents regarded global warming as both bad and highly likely. Many believed that warming has already occurred. They tended to confuse stratospheric ozone depletion with the greenhouse effect and weather with climate. Automobile use, heat and emissions from industrial processes, aerosol spray cans, and pollution in general were frequently perceived as primary causes of global warming. Additionally, the [open quotes]greenhouse effect[close quotes] was often interpreted literally as the cause of a hot and steamy climate. The effects attributed to climate change often included increased skin cancer and changed agricultural yields. The mitigation and control strategies proposed by interviewees typically focused on general pollution control, with few specific links to carbon dioxide and energy use. Respondents appeared to be relatively unfamiliar with such regulatory developments as the ban on CFCs for nonessential uses. These beliefs must be considered by those designing risk communications or presenting climate-related policies to the public. 20 refs., 4 tabs.

Bostrom, A. (Georgia Institute of Technology, Atlanta, GA (United States)); Morgan, M.G.; Fischhoff, B.; Read, D. (Carnegie Mellon Univ., Pittsburgh, PA (United States))

1994-12-01T23:59:59.000Z

219

The dilemma of fossil fuel use and global climate change  

SciTech Connect

The use of fossil fuels and relationship to climate change is discussed. As the use of fossil fuels has grown, the problems of protecting the environment and human health and safety have also grown, providing a continuing challenge to technological and managerial innovation. Today that challenge is to control atmospheric emissions from combustion, particularly those emissions that cause acidic deposition, urban pollution, and increasing concentrations of greenhouse gases. Technology for reducing acidic deposition is available and needs only to be adopted, and the remedies for urban pollution are being developed and tested. How effective or expensive these will be remains to be determined. The control of emissions of the greenhouse gas, CO{sub 2}, seems possible only be reducing the total amounts of fossil fuels used worldwide, and by substituting efficient natural gas technologies for coal. Long before physical depletion forces the transition away from fossil fuels, it is at least plausible and even likely that the greenhouse effect will impose a show-stopping constraint. If such a transition were soon to be necessary, the costs would be very high because substitute energy sources are either limited or expensive or undesirable for other reasons. Furthermore, the costs would be unevenly felt and would be more oppressive for developing nations because they would be least able to pay and, on average, their use rates of fossil fuels are growing much faster than those of many industrialized countries. It is prudent, therefore, to try to manage the use of fossil fuels as if a greenhouse constraint is an important possibility.

Judkins, R.R.; Fulkerson, W. (Oak Ridge National Lab., TN (USA)); Sanghvi, M.K. (Amoco Corp., Chicago, IL (USA))

1991-01-01T23:59:59.000Z

220

Integrating Natural Gas Hydrates in the Global Carbon Cycle  

Science Conference Proceedings (OSTI)

We produced a two-dimensional geological time- and basin-scale model of the sedimentary margin in passive and active settings, for the simulation of the deep sedimentary methane cycle including hydrate formation. Simulation of geochemical data required development of parameterizations for bubble transport in the sediment column, and for the impact of the heterogeneity in the sediment pore fluid flow field, which represent new directions in modeling methane hydrates. The model is somewhat less sensitive to changes in ocean temperature than our previous 1-D model, due to the different methane transport mechanisms in the two codes (pore fluid flow vs. bubble migration). The model is very sensitive to reasonable changes in organic carbon deposition through geologic time, and to details of how the bubbles migrate, in particular how efficiently they are trapped as they rise through undersaturated or oxidizing chemical conditions and the hydrate stability zone. The active margin configuration reproduces the elevated hydrate saturations observed in accretionary wedges such as the Cascadia Margin, but predicts a decrease in the methane inventory per meter of coastline relative to a comparable passive margin case, and a decrease in the hydrate inventory with an increase in the plate subduction rate.

David Archer; Bruce Buffett

2011-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "global climate cycle" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Improved Offshore Wind Resource Assessment in Global Climate Stabilization Scenarios  

SciTech Connect

This paper introduces a technique for digesting geospatial wind-speed data into areally defined -- country-level, in this case -- wind resource supply curves. We combined gridded wind-vector data for ocean areas with bathymetry maps, country exclusive economic zones, wind turbine power curves, and other datasets and relevant parameters to build supply curves that estimate a country's offshore wind resource defined by resource quality, depth, and distance-from-shore. We include a single set of supply curves -- for a particular assumption set -- and study some implications of including it in a global energy model. We also discuss the importance of downscaling gridded wind vector data to capturing the full resource potential, especially over land areas with complex terrain. This paper includes motivation and background for a statistical downscaling methodology to account for terrain effects with a low computational burden. Finally, we use this forum to sketch a framework for building synthetic electric networks to estimate transmission accessibility of renewable resource sites in remote areas.

Arent, D.; Sullivan, P.; Heimiller, D.; Lopez, A.; Eurek, K.; Badger, J.; Jorgensen, H. E.; Kelly, M.; Clarke, L.; Luckow, P.

2012-10-01T23:59:59.000Z

222

Improved Offshore Wind Resource Assessment in Global Climate Stabilization Scenarios  

DOE Green Energy (OSTI)

This paper introduces a technique for digesting geospatial wind-speed data into areally defined -- country-level, in this case -- wind resource supply curves. We combined gridded wind-vector data for ocean areas with bathymetry maps, country exclusive economic zones, wind turbine power curves, and other datasets and relevant parameters to build supply curves that estimate a country's offshore wind resource defined by resource quality, depth, and distance-from-shore. We include a single set of supply curves -- for a particular assumption set -- and study some implications of including it in a global energy model. We also discuss the importance of downscaling gridded wind vector data to capturing the full resource potential, especially over land areas with complex terrain. This paper includes motivation and background for a statistical downscaling methodology to account for terrain effects with a low computational burden. Finally, we use this forum to sketch a framework for building synthetic electric networks to estimate transmission accessibility of renewable resource sites in remote areas.

Arent, D.; Sullivan, P.; Heimiller, D.; Lopez, A.; Eurek, K.; Badger, J.; Jorgensen, H. E.; Kelly, M.; Clarke, L.; Luckow, P.

2012-10-01T23:59:59.000Z

223

The CharXive Challenge. Regulation of global carbon cycles by vegetation fires  

E-Print Network (OSTI)

It is an open, but not unanswerable, question as to how much atmospheric CO2 is sequestered globally by vegetation fires. In this work I conceptualise the question in terms of the general CharXive Challenge, discuss a mechanism by which thermoconversion of biomass may regulate the global distribution of carbon between reservoirs, show how suppression of vegetation fires by human activities may increase the fraction of carbon in the atmospheric pool, and pose three specific CharXive Challenges of crucial strategic significance to our management of global carbon cycles.

Ball, R

2010-01-01T23:59:59.000Z

224

Integrating chemistry into 3D climate models: Detailed kinetics in the troposphere and stratosphere of a global climate model  

SciTech Connect

This is the final report of a three-year, Laboratory Directed Research and Development (LDRD) project at Los Alamos National Laboratory (LANL). The motivation for the project is to create the first complete, three-dimensional climate model that enfolds atmospheric photochemistry. The LANL chemical global climate model (GCM) not only distributes the trace greenhouse gases and modifies their concentrations within the detailed photochemical web, but also permits them to influence the radiation field and so force their own transport. Both atmospheric chemistry and fluid dynamics are nonlinear and zonally asymmetric phenomena. They can only be adequately modeled in three dimensions on the global grid. The kinetics-augmented GCM is the only program within the atmospheric community capable of investigating interaction involving chemistry and transport. The authors have conducted case studies of timely three-dimensional chemistry issues. Examples include ozone production from biomass burning plumes, kinetic feedbacks in zonally asymmetric transport phenomena with month- to year-long time scales, and volcano sulfate aerosols with respect to their potential effects on tropospheric ozone depletion.

Kao, C.Y.J.; Elliott, S. [Los Alamos National Lab., NM (United States). Earth and Environmental Sciences Div.; Turco, R.P.; Zhao, X. [Univ. of California, Los Angeles, CA (United States)

1997-11-01T23:59:59.000Z

225

A Strategic Metal for Green Technology: The Geologic Occurrence and Global Life Cycle of Lithium  

E-Print Network (OSTI)

A Strategic Metal for Green Technology: The Geologic Occurrence and Global Life Cycle of Lithium. Mainly due to the growing demand for lightweight and powerful batteries, lithium has become such a metal. While supplies of lithium have historically been mined from pegmatites, brine extraction from salars

226

Sensitivity of the Global Water Cycle to the Water-Holding Capacity of Land  

Science Conference Proceedings (OSTI)

The sensitivity of the global water cycle to the water-holding capacity of the plant-root zone of continental soils is estimated by simulations using a mathematical model of the general circulation of the atmosphere, with prescribed ocean surface ...

P. C. D. Milly; K. A. Dunne

1994-04-01T23:59:59.000Z

227

Solar Cycles in 150 Years of Global Sea Surface Temperature Data  

Science Conference Proceedings (OSTI)

The purpose of the present work is to demonstrate that a solar cycle response exists in surface temperature using the longest global dataset available, which is in the form of 1854–2007 sea surface temperature (SST), with an emphasis on methods ...

Jiansong Zhou; Ka-Kit Tung

2010-06-01T23:59:59.000Z

228

Do Global Models Properly Represent the Feedback between Land and Atmosphere?  

Science Conference Proceedings (OSTI)

The Global Energy and Water Cycle Experiment/Climate Variability and Predictability (GEWEX/CLIVAR) Global Land–Atmosphere Coupling Experiment (GLACE) has provided an estimate of the global distribution of land–atmosphere coupling strength during ...

Paul A. Dirmeyer; Randal D. Koster; Zhichang Guo

2006-12-01T23:59:59.000Z

229

A Report of the EMF 19 Study on Technology and Global Climate Change Policies  

NLE Websites -- All DOE Office Websites (Extended Search)

REPORT ON THE EMF 19 STUDY ON REPORT ON THE EMF 19 STUDY ON TECHNOLOGY AND GLOBAL CLIMATE CHANGE POLICIES David J. Beecy (david.beecy@hq.doe.gov; 301-903-2786) Office of Environmental Systems Technology U.S. Department of Energy 19901 Germantown Road GTN, FE-23, E-133 Germantown, MD 20545 Andy S. Kydes (akydes@eia.doe.gov; 202-586-0883) Integrated Analysis and Forecasting, EI-80 Energy Information Administration U.S. Department of Energy 100 Independence Avenue, SW Washington, DC 20585 Richard G. Richels (rrichels@epri.com; 650-855-2602) Global Climate Change Program Electric Power Research Institute 3412 Hillview Avenue Palo Alto, CA 94304 John P. Weyant (weyant@stanford.edu; 650-723-3506) Department of Management Science & Engineering Terman Building: Room 406 Stanford University Stanford, CA 94305-4026

230

Simulation of the Global Hydrological Cycle in the CCSM Community Atmosphere Model Version 3 (CAM3): Mean Features  

Science Conference Proceedings (OSTI)

The seasonal and annual climatological behavior of selected components of the hydrological cycle are presented from coupled and uncoupled configurations of the atmospheric component of the Community Climate System Model (CCSM) Community ...

James J. Hack; Julie M. Caron; Stephen G. Yeager; Keith W. Oleson; Marika M. Holland; John E. Truesdale; Philip J. Rasch

2006-06-01T23:59:59.000Z

231

Sensitivity of Simulated Global Climate to Perturbations in Low Cloud Microphysical Properties. Part II: Spatially Localized Perturbations  

Science Conference Proceedings (OSTI)

The sensitivity of the global climate to spatially localized (20°–70°N) perturbations in the microphysical properties of low clouds is investigated using a general circulation model coupled to a mixed layer ocean with fixed cloud distributions. ...

C-T. Chen; V. Ramaswamy

1996-11-01T23:59:59.000Z

232

15.023J / 12.848J / ESD.128J Global Climate Change: Economics, Science, and Policy, Spring 2004  

E-Print Network (OSTI)

Introduces scientific, economic, and ecological issues underlying the threat of global climate change, and the institutions engaged in negotiating an international response. Develops an integrated approach to analysis of ...

Jacoby, Henry D.

233

15.023J / 12.848J / ESD.128J Global Climate Change: Economics, Science, and Policy, Spring 2007  

E-Print Network (OSTI)

Introduces scientific, economic, and ecological issues underlying the threat of global climate change, and the institutions engaged in negotiating an international response. Develops an integrated approach to analysis of ...

Jacoby, Henry D.

234

Global climate change and international security. Report on a conference held at Argonne National Laboratory, May 8--10, 1991  

Science Conference Proceedings (OSTI)

On May 8--10, 1991, the Midwest Consortium of International Security Studies (MCISS) and Argonne National Laboratory cosponsored a conference on Global Climate Change and International Security. The aim was to bring together natural and social scientists to examine the economic, sociopolitical, and security implications of the climate changes predicted by the general circulation models developed by natural scientists. Five themes emerged from the papers and discussions: (1) general circulation models and predicted climate change; (2) the effects of climate change on agriculture, especially in the Third World; (3) economic implications of policies to reduce greenhouse gas emissions; (4) the sociopolitical consequences of climate change; and (5) the effect of climate change on global security.

Rice, M.

1991-12-31T23:59:59.000Z

235

Estimating future global per capita water availability based on changes in climate and population  

Science Conference Proceedings (OSTI)

Human populations are profoundly affected by water stress, or the lack of sufficient per capita available freshwater. Water stress can result from overuse of available freshwater resources or from a reduction in the amount of available water due to decreases in rainfall and stored water supplies. Analyzing the interrelationship between human populations and water availability is complicated by the uncertainties associated with climate change projections and population projections. We present a simple methodology developed to integrate disparate climate and population data sources and develop first-order per capita water availability projections at the global scale. Simulations from the coupled land-ocean-atmosphere Community Climate System Model version 3 (CCSM3) forced with a range of hypothetical greenhouse gas emissions scenarios are used to project grid-based changes in precipitation minus evapotranspiration as proxies for changes in runoff, or fresh water supply. Population growth changes according to several Intergovernmental Panel on Climate Change (IPCC) storylines are used as proxies for changes in fresh water demand by 2025, 2050 and 2100. These freshwater supply and demand projections are then combined to yield estimates of per capita water availability aggregated by watershed and political unit. Results suggest that important insights might be extracted from the use of the process developed here, notably including the identification of the globe s most vulnerable regions in need of more detailed analysis and the relative importance of population growth versus climate change in in altering future freshwater supplies. However, these are only exemplary insights and, as such, could be considered hypotheses that should be rigorously tested with multiple climate models, multiple observational climate datasets, and more comprehensive population change storylines.

Parish, Esther S [ORNL; Kodra, Evan [Northeastern University; Ganguly, Auroop R [Northeastern University; Steinhaeuser, Karsten [University of Minnesota

2012-01-01T23:59:59.000Z

236

Evaluating the Land and Ocean Components of the Global Carbon Cycle in the CMIP5 Earth System Models  

Science Conference Proceedings (OSTI)

The authors assess the ability of 18 Earth system models to simulate the land and ocean carbon cycle for the present climate. These models will be used in the next Intergovernmental Panel on Climate Change (IPCC) Fifth Assessment Report (AR5) for ...

A. Anav; P. Friedlingstein; M. Kidston; L. Bopp; P. Ciais; P. Cox; C. Jones; M. Jung; R. Myneni; Z. Zhu

2013-09-01T23:59:59.000Z

237

A Global Climate Model (GENESIS) with a Land-Surface Transfer Scheme (LSX). Part II: CO2 Sensitivity  

Science Conference Proceedings (OSTI)

The sensitivity of the equilibrium climate to doubled atmospheric CO2 is investigated using the GENESIS global climate model version 1.02. The atmospheric general circulation model is a heavily modified version of the NCAR CCM1 and is coupled to ...

Starley L. Thompson; David Pollard

1995-05-01T23:59:59.000Z

238

CO2 capture, reuse, and sequestration technologies for mitigating global climate change  

SciTech Connect

Fossil fuels currently supply over 85% of the world`s energy needs. They will remain in abundant supply well into the 21st century. They have been a major contributor to the high standard of living enjoyed by the industrialized world. We have learned how to extract energy from fossil fuels in environmentally friendly ways, controlling the emissions of NO{sub x}, S0{sub 2}, unburned hydrocarbons, and particulates. Even with these added pollution controls, the cost of fossil energy generated power keeps falling. Despite this good news about fossil energy, its future is clouded because of the environmental and economic threat posed by possible climate change, commonly referred to as the `greenhouse effect`. The major greenhouse gas is carbon dioxide (CO{sub 2}) and the major source of anthropogenic C0{sub 2} is combustio of fossil fuels. The potential impacts of global climate change are many and varied, though there is much uncertainty as to the timing and magnitude (Watson et al., 1996). Because of the potential adverse impacts, the world community has adopted the Framework Convention on Climate Change (see Box 1). The urgency of their work was recently underscored when the Intergovernmental Panel on Climate Change (IPCC) issued their Second Assessment Report which stated that `the balance of evidence suggests a discernible human influence on global climate`. The goal of stabilization of greenhouse gas emissions at their 1990 levels in the year 2000 will not be met by the vast majority of countries. Based on this experience, it is obvious that more aggressive technology responses are required if we want to control greenhouse gas emissions.

Herzog, H.J., MIT Energy Laboratory

1998-01-01T23:59:59.000Z

239

Global Climate Change and the Transportation Sector: An Update on Issues and Mitigation Options  

DOE Green Energy (OSTI)

It is clear from numerous energy/economic modeling exercises that addressing the challenges posed by global climate change will eventually require the active participation of all industrial sectors and all consumers on the planet. Yet, these and similar modeling exercises indicate that large stationary CO2 point sources (e.g., refineries and fossil-fired electric power plants) are often the first targets considered for serious CO2 emissions mitigation. Without participation of all sectors of the global economy, however, the challenges of climate change mitigation will not be met. Because of its operating characteristics, price structure, dependence on virtually one energy source (oil), enormous installed infrastructure, and limited technology alternatives, at least in the near-term, the transportation sector will likely represent a particularly difficult challenge for CO2 emissions mitigation. Our research shows that climate change induced price signals (i.e., putting a price on carbon that is emitted to the atmosphere) are in the near term insufficient to drive fundamental shifts in demand for energy services or to transform the way these services are provided in the transportation sector. We believe that a technological revolution will be necessary to accomplish the significant reduction of greenhouse gas emissions from the transportation sector. This paper presents an update of ongoing research into a variety of technological options that exist for decarbonizing the transportation sector and the various tradeoffs among them.

Geffen, CA; Dooley, JJ; Kim, SH

2003-08-24T23:59:59.000Z

240

Testing for the Possible Influence of Unknown Climate Forcings upon Global Temperature Increases from 1950 to 2000  

Science Conference Proceedings (OSTI)

Global-scale variations in the climate system over the last half of the twentieth century, including long-term increases in global-mean near-surface temperatures, are consistent with concurrent human-induced emissions of radiatively active gases ...

Bruce T. Anderson; Jeff R. Knight; Mark A. Ringer; Jin-Ho Yoon; Annalisa Cherchi

2012-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "global climate cycle" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Bringing Clouds into Focus: A New Global Climate Model May Reduce the  

NLE Websites -- All DOE Office Websites (Extended Search)

Bringing Clouds into Bringing Clouds into Focus Bringing Clouds into Focus A New Global Climate Model May Reduce the Uncertainty of Climate Forecasting May 11, 2010 | Tags: Lattice QCD Contact: John Hules, JAHules@lbl.gov , +1 510 486 6008 Randall-fig4.png The large data sets generated by the GCRM require new analysis and visualization capabilities. This 3D plot of vorticity isosurfaces was developed using VisIt, a 3D visualization tool with a parallel distributed architecture, which is being extended to support the geodesic grid used by the GCRM. (Image Courtesy of the NERSC Analytics Team) Clouds exert two competing effects on the Earth's temperature: they cool the planet by reflecting solar radiation back to space, but they also warm the planet by trapping heat near the surface. These two effects coexist in

242

Global climate feedbacks: Conclusions and recommendations of the June 1990 BNL workshop  

SciTech Connect

The issue of global change initiated by increases in the concentrations of CO{sub 2} and other greenhouse gases is a scientific issue with major policy implications. The best means to examine the response of the Earth's climate to prospective perturbations in radiative forcing caused by such changes, and to other industrial activities, is modeling, specifically by means of general circulation models (GCMs) of the Earth's atmosphere and of the coupled atmosphere-ocean system. The purpose of this workshop was to identify the feedbacks inherent in the Earth's climate that actually or potentially govern the system's response to perturbations, to identify gaps in knowledge that preclude the accurate representation of these feedbacks in models, and to identify research required to represent these feedbacks accurately in models.

Manowitz, B.

1990-08-01T23:59:59.000Z

243

On the relationship between uncertainties in tropical divergence and the hydrological cycle in global models  

Science Conference Proceedings (OSTI)

A survey of tropical divergence from three GCMs, three global reanalyses and four insitu soundings from field campaigns shows the existence of large uncertainties in the ubiquity of shallow divergent circulation as well as the depth and strength of the deep divergent circulation. More specifically, only two GCMs out of the three GCMs and three global reanalyses show significant shallow divergent circulation, which is present in all in-situ soundings, and of the three GCMs and three global reanalyses, only two global reanalyses have deep divergence profiles that lie within the range of uncertainty of the soundings. The relationships of uncertainties in the shallow and deep divergent circulation to uncertainties in present day and projected strength of the hydrological cycle from the GCMs are assessed. In the tropics and subtropics, deep divergent circulation is the largest contributor to moisture convergence that balances the net precipitation, and inter-model differences in the present day simulations carry over onto the future projections. In comparison to the soundings and reanalyses, the GCMs are found to have deeper and stronger divergent circulation. While these two characteristics of GCM divergence affect the strength of the hydrological cycle, they tend to compensate for each other so that their combined effect is relatively modest.

Hagos, Samson M.; Leung, Lai-Yung R.

2012-01-01T23:59:59.000Z

244

Managing the global commons decision making and conflict resolution in response to climate change  

SciTech Connect

A workshop was convened to develop a better understanding of decision-making matters concerning management of the global commons and to resolve conflicts in response to climate change. This workshop report does not provide a narrative of the proceedings. The workshop program is included, as are the abstracts of the papers that were presented. Only the introductory paper on social science research by William Riebsame and the closing summary by Richard Rockwell are reprinted here. This brief report focuses instead on the deliberations of the working groups that developed during the workshop. 4 figs., 1 tab.

Rayner, S. (Oak Ridge National Lab., TN (USA)); Naegeli, W.; Lund, P. (Tennessee Univ., Knoxville, TN (USA))

1990-07-01T23:59:59.000Z

245

Global and Seasonal Assessment of Interactions between Climate and Vegetation Biophysical Processes: A GCM Study with Different Land–Vegetation Representations  

Science Conference Proceedings (OSTI)

A global and seasonal assessment of regions of the earth with strong climate–vegetation biophysical process (VBP) interactions is provided. The presence of VBP and degree of VBP effects on climate were assessed based on the skill of simulations ...

Yongkang Xue; Fernando De Sales; Ratko Vasic; C. Roberto Mechoso; Akio Arakawa; Stephen Prince

2010-03-01T23:59:59.000Z

246

Effects of Ocean Biology on the Penetrative Radiation in a Coupled Climate Model  

Science Conference Proceedings (OSTI)

The influence of phytoplankton on the seasonal cycle and the mean global climate is investigated in a fully coupled climate model. The control experiment uses a fixed attenuation depth for shortwave radiation, while the attenuation depth in the ...

Patrick Wetzel; Ernst Maier-Reimer; Michael Botzet; Johann Jungclaus; Noel Keenlyside; Mojib Latif

2006-08-01T23:59:59.000Z

247

Challenges to Reproduce Vegetation Structure and Dynamics in Amazonia Using a Coupled Climate–Biosphere Model  

Science Conference Proceedings (OSTI)

The Amazon rain forest constitutes one of the major global stocks of carbon. Recent studies, including the last Intergovernmental Panel on Climate Change report and the Coupled Climate Carbon Cycle Model Intercomparison Project, have suggested ...

Mônica Carneiro Alves Senna; Marcos Heil Costa; Lucía Iracema Chipponelli Pinto; Hewlley Maria Acioli Imbuzeiro; Luciana Mara Freitas Diniz; Gabrielle Ferreira Pires

2009-09-01T23:59:59.000Z

248

Testing for the Possible Influence of Unknown Climate Forcings upon Global Temperature Increases from 1950-2000  

SciTech Connect

Global-scale variations in the climate system over the last half of the twentieth century, including long-term increases in global-mean near-surface temperatures, are consistent with concurrent human-induced emissions of radiatively active gases and aerosols. However, such consistency does not preclude the possible influence of other forcing agents, including internal modes of climate variability or unaccounted for aerosol effects. To test whether other unknown forcing agents may have contributed to multidecadal increases in global-mean near-surface temperatures from 1950 to 2000, data pertaining to observed changes in global-scale sea surface temperatures and observed changes in radiatively active atmospheric constituents are incorporated into numerical global climate models. Results indicate that the radiative forcing needed to produce the observed long-term trends in sea surface temperatures—and global-mean near-surface temperatures—is provided predominantly by known changes in greenhouse gases and aerosols. Further, results indicate that less than 10% of the long-term historical increase in global-mean near-surface temperatures over the last half of the twentieth century could have been the result of internal climate variability. In addition, they indicate that less than 25%of the total radiative forcing needed to produce the observed long-term trend in global-mean near-surface temperatures could have been provided by changes in net radiative forcing from unknown sources (either positive or negative). These results, which are derived from simple energy balance requirements, emphasize the important role humans have played in modifying the global climate over the last half of the twentieth century.

Anderson, Bruce T.; Knight, Jeff R.; Ringer, Mark A.; Yoon, Jin-Ho; Cherchi, Annalisa

2012-10-15T23:59:59.000Z

249

Uncertainty Quantification and Parameter Tuning in the CAM5 Zhang-McFarlane Convection Scheme and Impact of Improved Convection on the Global Circulation and Climate  

SciTech Connect

In this study, we applied an uncertainty quantification (UQ) technique to improve convective precipitation in the global climate model, the Community Atmosphere Model version 5 (CAM5), in which the convective and stratiform precipitation partitioning is very different from observational estimates. We examined the sensitivity of precipitation and circulation to several key parameters in the Zhang-McFarlane deep convection scheme in CAM5, using a stochastic importance-sampling algorithm that can progressively converge to optimal parameter values. The impact of improved deep convection on the global circulation and climate was subsequently evaluated. Our results show that the simulated convective precipitation is most sensitive to the parameters of the convective available potential energy consumption time scale, parcel fractional mass entrainment rate, and maximum downdraft mass flux fraction. Using the optimal parameters constrained by the observed Tropical Rainfall Measuring Mission, convective precipitation improves the simulation of convective to stratiform precipitation ratio and rain-rate spectrum remarkably. When convection is suppressed, precipitation tends to be more confined to the regions with strong atmospheric convergence. As the optimal parameters are used, positive impacts on some aspects of the atmospheric circulation and climate, including reduction of the double Intertropical Convergence Zone, improved East Asian monsoon precipitation, and improved annual cycles of the cross-equatorial jets, are found as a result of the vertical and horizontal redistribution of latent heat release from the revised parameterization. Positive impacts of the optimal parameters derived from the 2 simulations are found to transfer to the 1 simulations to some extent.

Yang, Ben; Qian, Yun; Lin, Guang; Leung, Lai-Yung R.; Rasch, Philip J.; Zhang, Guang J.; McFarlane, Sally A.; Zhao, Chun; Zhang, Yaocun; Wang, Hailong; Wang, Minghuai; Liu, Xiaohong

2013-01-25T23:59:59.000Z

250

Global Climate Change and the Unique Challenges Posed by the Transportation Sector  

DOE Green Energy (OSTI)

Addressing the challenges posed by global climate change will eventually require the active participation of all industrial sectors and consumers on the planet. To date, however, most efforts to address climate change have focused on only a few sectors of the economy (e.g., refineries and fossil-fired electric power plants) and a handful of large industrialized nations. While useful as a starting point, these efforts must be expanded to include other sectors of the economy and other nations. The transportation sector presents some unique challenges, with its nearly exclusive dependence on petroleum based products as a fuel source coupled with internal combustion engines as the prime mover. Reducing carbon emissions from transportation systems is unlikely to be solely accomplished by traditional climate mitigation policies that place a price on carbon. Our research shows that price signals alone are unlikely to fundamentally alter the demand for energy services or to transform the way energy services are provided in the transportation sector. We believe that a technological revolution will be necessary to accomplish the significant reduction of greenhouse gas emissions from the transportation sector.

Dooley, J.J.; Geffen, C.A.; Edmonds, J.A.

2002-08-26T23:59:59.000Z

251

Solar dynamo as host power pacemaker of the Earth global climate  

E-Print Network (OSTI)

It is known that the so-called problem of solar power pacemaker related to possible existence of some hidden but key mechanism of energy influence of the Sun on fundamental geophysical processes is one of the principal and puzzling problems of modern climatology. The "tracks" of this mechanism have been shown up in different problems of solar-terrestrial physics for a long time and, in particular, in climatology, where the solar-climate variability is stably observed. However, the mechanisms by which small changes in the Sun's energy (solar irradiance or insolation) output during the solar cycle can cause change in the weather and climate are still unknown. We analyze possible causes of the solar-climate variability concentrating one's attention on the physical substantiation of strong correlation between the temporal variations of magnetic flux of the solar tachocline zone and the Earth magnetic field (Y-component). We propose an effective mechanism of solar dynamo-geodynamo connection which plays the role o...

Rusov, Vitaliy D; Vaschenko, Vladimir N; Mavrodiev, Strachimir Cht; Beglaryan, Margarita E; Zelentsova, Tatiana N; Tarasov, Victor A; Litvinov, Dmitriy A; Smolyar, Vladimir P; Vachev, Boyko I

2011-01-01T23:59:59.000Z

252

Climate Impacts of Land-Cover and Land-Use Changes in Tropical Islands under Conditions of Global Climate Change  

Science Conference Proceedings (OSTI)

Land-cover and land-use (LCLU) changes have significant climate impacts in tropical coastal regions with the added complexity of occurring within the context of a warming climate. The individual and combined effects of these two factors in ...

Daniel E. Comarazamy; Jorge E. González; Jeffrey C. Luvall; Douglas L. Rickman; Robert D. Bornstein

2013-03-01T23:59:59.000Z

253

Collaborative Proposal: Transforming How Climate System Models are Used: A Global, Multi-Resolution Approach  

SciTech Connect

Despite the great interest in regional modeling for both weather and climate applications, regional modeling is not yet at the stage that it can be used routinely and effectively for climate modeling of the ocean. The overarching goal of this project is to transform how climate models are used by developing and implementing a robust, efficient, and accurate global approach to regional ocean modeling. To achieve this goal, we will use theoretical and computational means to resolve several basic modeling and algorithmic issues. The first task is to develop techniques for transitioning between parameterized and high-fidelity regional ocean models as the discretization grid transitions from coarse to fine regions. The second task is to develop estimates for the error in scientifically relevant quantities of interest that provide a systematic way to automatically determine where refinement is needed in order to obtain accurate simulations of dynamic and tracer transport in regional ocean models. The third task is to develop efficient, accurate, and robust time-stepping schemes for variable spatial resolution discretizations used in regional ocean models of dynamics and tracer transport. The fourth task is to develop frequency-dependent eddy viscosity finite element and discontinuous Galerkin methods and study their performance and effectiveness for simulation of dynamics and tracer transport in regional ocean models. These four projects share common difficulties and will be approach using a common computational and mathematical toolbox. This is a multidisciplinary project involving faculty and postdocs from Colorado State University, Florida State University, and Penn State University along with scientists from Los Alamos National Laboratory. The completion of the tasks listed within the discussion of the four sub-projects will go a long way towards meeting our goal of developing superior regional ocean models that will transform how climate system models are used.

Estep, Donald

2013-04-15T23:59:59.000Z

254

Simulation Skills of the SST-Forced Global Climate Variability of the NCEP–MRF9 and the Scripps–MPI ECHAM3 Models  

Science Conference Proceedings (OSTI)

The global responses of two atmospheric general circulation models (AGCM), the National Centers for Environmental Prediction–Medium Range Forecast (NCEP–MRF9) and the University of Hamburg climate model–3 (ECHAM), to simultaneous global SST ...

Peitao Peng; Arun Kumar; Anthony G. Barnston; Lisa Goddard

2000-10-01T23:59:59.000Z

255

LEDS Global Partnership in Action: Advancing Climate-Resilient Low Emission Development Around the World (Fact Sheet)  

SciTech Connect

Many countries around the globe are designing and implementing low emission development strategies (LEDS). These LEDS seek to achieve social, economic, and environmental development goals while reducing long-term greenhouse gas (GHG) emissions and increasing resiliency to climate change impacts. The LEDS Global Partnership (LEDS GP) harnesses the collective knowledge and resources of more than 120 countries and international donor and technical organizations to strengthen climate-resilient low emission development efforts around the world.

Not Available

2013-11-01T23:59:59.000Z

256

Climate & Environment | More Science | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

Climate & Environment Climate & Environment SHARE Climate and Environment Climate and environmental scientists at ORNL conduct research, develop technology and perform analyses to understand and predict how environmental systems respond to global and regional changes - including climate change, environmental stress and energy production and use. By integrating field and laboratory methods with new theory, modeling, data systems and policy analysis, we develop solutions to complex environmental challenges. ORNL has an increasing programmatic focus on climate change and subsurface biogeochemical research. Current priorities in the area of climate and environmental research are focused on understanding biogeochemical cycling in terrestrial ecosystems by creating new databases and models to inform

257

Climate & Environmental Sciences | More Science | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

Climate & Environment Climate & Environment SHARE Climate and Environmental Sciences Climate and environmental scientists at ORNL conduct research, develop technology and perform analyses to understand and predict how environmental systems respond to global and regional changes - including climate change, environmental stress and energy production and use. By integrating field and laboratory methods with new theory, modeling, data systems and policy analysis, we develop solutions to complex environmental challenges. ORNL has an increasing programmatic focus on climate change and subsurface biogeochemical research. Current priorities in the area of climate and environmental research are focused on understanding biogeochemical cycling in terrestrial ecosystems by creating new databases and models to inform

258

Climate & Environmental Sciences | More Science | ORNL  

NLE Websites -- All DOE Office Websites (Extended Search)

Climate & Environment Climate & Environment SHARE Climate and Environmental Sciences Climate and environmental scientists at ORNL conduct research, develop technology and perform analyses to understand and predict how environmental systems respond to global and regional changes - including climate change, environmental stress and energy production and use. By integrating field and laboratory methods with new theory, modeling, data systems and policy analysis, we develop solutions to complex environmental challenges. ORNL has an increasing programmatic focus on climate change and subsurface biogeochemical research. Current priorities in the area of climate and environmental research are focused on understanding biogeochemical cycling in terrestrial ecosystems by creating new databases and models to inform

259

Estimates of the long-term U.S. economic impacts of global climate change-induced drought.  

SciTech Connect

While climate-change models have done a reasonable job of forecasting changes in global climate conditions over the past decades, recent data indicate that actual climate change may be much more severe. To better understand some of the potential economic impacts of these severe climate changes, Sandia economists estimated the impacts to the U.S. economy of climate change-induced impacts to U.S. precipitation over the 2010 to 2050 time period. The economists developed an impact methodology that converts changes in precipitation and water availability to changes in economic activity, and conducted simulations of economic impacts using a large-scale macroeconomic model of the U.S. economy.

Ehlen, Mark Andrew; Loose, Verne W.; Warren, Drake E.; Vargas, Vanessa N.

2010-01-01T23:59:59.000Z

260

Regional Climate Model Simulation of U.S. Precipitation during 1982–2002. Part I: Annual Cycle  

Science Conference Proceedings (OSTI)

The fifth-generation PSU–NCAR Mesoscale Model (MM5)-based regional climate model (CMM5) capability in simulating the U.S. precipitation annual cycle is evaluated with a 1982–2002 continuous baseline integration driven by the NCEP–DOE second ...

Xin-Zhong Liang; Li Li; Kenneth E. Kunkel; Mingfang Ting; Julian X. L. Wang

2004-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "global climate cycle" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Fungal, bacterial, and archaeal communities mediating C cycling and trace gas flux in peatland ecosystems subject to climate change  

E-Print Network (OSTI)

Fungal, bacterial, and archaeal communities mediating C cycling and trace gas flux in peatland microbial community profiling in a network of natural peatland ecosystems spanning large-scale climate the drivers of microbial community composition via metagenomic and metatranscriptomic analysis of samples from

262

Atmospheric Moisture Transports from Ocean to Land and Global Energy Flows in Reanalyses  

Science Conference Proceedings (OSTI)

An assessment is made of the global energy and hydrological cycles from eight current atmospheric reanalyses and their depiction of changes over time. A brief evaluation of the water and energy cycles in the latest version of the NCAR climate ...

Kevin E. Trenberth; John T. Fasullo; Jessica Mackaro

2011-09-01T23:59:59.000Z

263

The role of US agricultural and forest activities in global climate change mitigation  

E-Print Network (OSTI)

In 2005 the highest global surface temperature ever was recorded. A virtual consensus exists today among scientists that global warming is underway and that human greenhouse gas (GHG) emissions are a significant cause. Possible mitigation of climate change through reduction of net GHG emissions has become a worldwide concern. Under the United Nation’s Framework convention on Climate Change, the Kyoto Protocol was formed in 1997 and required ratifying countries to co-operate in stabilizing atmospheric GHG concentrations. The protocol took effect on February 16, 2005. The mitigation cost for reducing GHG emissions for the US economy has been argued to be high particularly through the energy sector. Agriculture and Forestry (AF) can provide some low cost strategies to help with this mitigation principally through carbon sequestration but must be competitive with mitigation costs in the rest of the economy. A general equilibrium approach is used herein to evaluate the role of AF mitigation in an economy wide setting. The results show that the AF sectors have significant mitigation potential. Higher carbon prices lead to more sequestration, less emissions, reduced consumer and total welfare, improved environmental indicators and increased producer welfare. AF mitigation increases as the carbon price increase over time. In the earlier periods, while the carbon price is low, AF emissions and sink are quite small compared to the energy sector. As carbon prices increase over time, the AF sectors mitigate about 25% of the net emissions. This verifies McCarl et al's (2001) argument that the AF sectors “may be very important in a world that requires time and technological investment to develop low-cost greenhouse gas emission offsets.” AF GHG emission mitigation is sensitive to saturation of sequestration sinks. This research finds that ignoring saturation characteristics leads to a severe overestimate of mitigation potential with estimates being inflated by as much as a factor of 6.

Zhu, En

2007-08-01T23:59:59.000Z

264

Global Warming: Physics and Facts  

Science Conference Proceedings (OSTI)

This report contains papers on: A tutorial on global atmospheric energetics and the greenhouse effect; global climate models: what and how; comparison of general circulation models; climate and the earth`s radiation budget; temperature and sea level change; short-term climate variability and predictions; the great ocean conveyor; trace gases in the atmosphere: temporal and spatial trends; the geochemical carbon cycle and the uptake of fossil fuel CO{sub 2}; forestry and global warming; the physical and policy linkages; policy implications of greenhouse warming; options for lowering US carbon dioxide emissions; options for reducing carbon dioxide emissions; and science and diplomacy: a new partnership to protect the environment.

Levi, B.G. [Physics Today, New York, NY (United States); Hafemeister, D. [Committee on Foreign Relations (U.S. Senate), Washington, DC (United States); Scribner, R. [Georgetown Univ., Washington, DC (United States)] [eds.

1992-05-01T23:59:59.000Z

265

Global Warming: Physics and Facts  

Science Conference Proceedings (OSTI)

This report contains papers on: A tutorial on global atmospheric energetics and the greenhouse effect; global climate models: what and how; comparison of general circulation models; climate and the earth's radiation budget; temperature and sea level change; short-term climate variability and predictions; the great ocean conveyor; trace gases in the atmosphere: temporal and spatial trends; the geochemical carbon cycle and the uptake of fossil fuel CO{sub 2}; forestry and global warming; the physical and policy linkages; policy implications of greenhouse warming; options for lowering US carbon dioxide emissions; options for reducing carbon dioxide emissions; and science and diplomacy: a new partnership to protect the environment.

Levi, B.G. (Physics Today, New York, NY (United States)); Hafemeister, D. (Committee on Foreign Relations (U.S. Senate), Washington, DC (United States)); Scribner, R. (Georgetown Univ., Washington, DC (United States)) (eds.)

1992-01-01T23:59:59.000Z

266

Numerical evaluation of mechanisms driving Early Jurassic changes in global carbon cycling  

Science Conference Proceedings (OSTI)

The Early Jurassic (early Toarcian, ca. 183 Ma) carbon cycle perturbation is characterized by aabout -5 parts per thousand {delta} {sup 13}C excursion in the exogenic carbon reservoirs, a 1000 ppm rise in atmospheric CO{sub 2}, and a 6-7 degrees warming. Two proposed explanations for this presumed global carbon cycle perturbation are the liberation of massive amounts of isotopically light CH4 from (1) Gondwanan coals by heating during the intrusive eruption of the Karoo-Ferrar large igneous province (LIP) or (2) the thermal dissociation of gas hydrates. Carbon cycle modeling indicates that the release of CH4 from Gondwanan coals synchronous with the eruption of the Karoo-Ferrar LIP fails to reproduce the magnitude or timing of the CO{sub 2} and {delta} {sup 13}C excursions. However, sensitivity analyses constrained by a marine cyclostratigraphically dated {delta}{sup 13}C record indicate that both features of geologic record can be explained with the huge input of about 15,340-24,750 Gt C over about 220 k.y., a result possibly pointing to the involvement of hydrothermal vent complexes in the Karoo Basin. The simulated release of > 6000 Gt C from gas hydrates also reproduces aspects of the early Toarcian rock record, but the large mass involved raises fundamental questions about its formation, storage, and release.

Beerling, D.J.; Brentnall, S.J. [University of Sheffield, Sheffield (United Kingdom)

2007-03-15T23:59:59.000Z

267

Sensitivity of the Ocean’s Climate to Diapycnal Diffusivity in an EMIC. Part II: Global Warming Scenario  

Science Conference Proceedings (OSTI)

The sensitivity of the ocean’s climate to the diapycnal diffusivity in the ocean is studied for a global warming scenario in which CO2 increases by 1% yr?1 for 75 yr. The thermohaline circulation slows down for about 100 yr and recovers afterward,...

Fabio Dalan; Peter H. Stone; Andrei P. Sokolov

2005-07-01T23:59:59.000Z

268

Sensitivity studies on the impacts of Tibetan Plateau snowpack pollution on the Asian hydrological cycle and monsoon climate  

SciTech Connect

The Tibetan Plateau (TP), the highest and largest plateau in the world, has long been identified to be critical in regulating the Asian monsoon climate and hydrological cycle. The snowpack and glaciers over the TP provide fresh water to billions of people in Asian countries, but the TP glaciers have been retreating extensively at a speed faster than any other part of the world. In this study a series of experiments with a global climate model are designed to simulate black carbon (BC) and dust in snow and their radiative forcing and to assess the relative impacts of anthropogenic CO2 and carbonaceous particles in the atmosphere and snow, respectively, on the snowpack over the TP, as well as their subsequent impacts on the Asian monsoon climate and hydrological cycle. Results show a large BC content in snow over the TP, especially the southern slope, with concentration larger than 100 µk/kg. Because of the high aerosol content in snow and large incident solar radiation in the low latitude and high elevation, the TP exhibits the largest surface radiative forcing induced by aerosols (e.g. BC, Dust) in snow compared to other snow-covered regions in the world. The aerosol-induced snow albedo perturbations generate surface radiative forcing of 5-25 W m-2 during spring, with a maximum in April or May. BC-in-snow increases the surface air temperature by around 1.0oC averaged over the TP and reduces snowpack over the TP more than that induced by pre-industrial to present CO2 increase and carbonaceous particles in the atmosphere during spring. As a result, runoff increases during late winter and early spring but decreases during late spring and early summer (i.e. a trend toward earlier melt dates). The snowmelt efficacy, defined as the snowpack reduction per unit degree of warming induced by the forcing agent, is 1-4 times larger for BC-in-snow than CO2 increase during April-July, indicating that BC-in-snow more efficiently accelerates snowmelt because the increased net solar radiation induced by reduced albedo melts the snow more efficiently than snow melt due to warming in the air. The TP also influences the South (SAM) and East (EAM) Asian monsoon through its dynamical and thermal forcing. During boreal spring, aerosols are transported by the southwesterly and reach the higher altitude and/or deposited in the snowpack over the TP. While BC and OM in the atmosphere directly absorb sunlight and warm the air, the darkened snow surface polluted by BC absorbs more solar radiation and increases the skin temperature, which warms the air above by the increased sensible heat flux over the TP. Both effects enhance the upward motion of air and spur deep convection along the TP during pre-monsoon season, resulting in earlier onset of the SAM and increase of moisture, cloudiness and convective precipitation over northern India. BC-in-snow has a more significant impact on the EAM in July than CO2 increase and carbonaceous particles in the atmosphere. Contributed by the significant increase of both sensible heat flux associated with the warm skin temperature and latent heat flux associated with increased soil moisture with long memory, the role of the TP as a heat pump is elevated from spring through summer as the land-sea thermal contrast increases to strengthen the EAM. As a result, both southern China and northern China become wetter, but central China (i.e. Yangtze River Basin) becomes drier - a near zonal anomaly pattern that is consistent with the dominant mode of precipitation variability in East Asia. ?

Qian, Yun; Flanner, M. G.; Leung, Lai-Yung R.; Wang, Weiguo

2011-03-02T23:59:59.000Z

269

Global Energy Technology Strategy: Addressing Climate Change Phase 2 Findings from an international Public-Private Sponsored Research Program  

DOE Green Energy (OSTI)

This book examines the role of global energy technology in addressing climate change. The book considers the nature of the climate change challenge and the role of energy in the issue. It goes on to consider the implications for the evolution of the global energy system and the potential value of technology availability, development and deployment. Six technology systems are identified for special consideration: CO2 capture and storage, Biotechnology, Hydrogen systems, Nuclear energy, Wind and solar energy, and End-use energy technologies. In addition, consideration is given to the role of non-CO2 gases in climate change as well as the potential of technology development and deployment to reduce non-CO2 emissions. Present trends in energy R&D are examined and potentially fruitful avenues for research. The book concludes with a set of key findings.

Edmonds, James A.; Wise, Marshall A.; Dooley, James J.; Kim, Son H.; Smith, Steven J.; Runci, Paul J.; Clarke, Leon E.; Malone, Elizabeth L.; Stokes, Gerald M.

2007-05-01T23:59:59.000Z

270

Preparing for climate change: major changes in global climate are virtually certain by the mid-21st century; researchers are beginning to explore ways we can adapt  

SciTech Connect

Major changes in the global climate are virtually certain by the mid-21st century due to the carbon dioxide and other greenhouse gases. Researchers are beginning to explore ways we can adopt. Scientist have long known that human activities, particularly the burning of fossil fuels, are artificially increasing the volume of greenhouse gases in the earth's atmosphere. This increase will eventually make the planet the hottest it has been in history. What remains controversial about the greenhouse effect is the rate of this global warming, its regional distribution, and most of all, what to do about the problem.

Tangley, L.

1988-01-01T23:59:59.000Z

271

Metadata compiled and distributed by the Carbon Dioxide Information Analysis Center for global climate change and greenhouse gas-related data bases  

SciTech Connect

The Carbon Dioxide Information Analysis Center (CDIAC) compiles and provides information to help international researchers, policymakers, and educators evaluate complex environmental issues associated with elevated levels of atmospheric carbon dioxide (CO{sub 2}) and other trace gases, including potential climate change. CDIAC is located within the Environmental Sciences Division of Oak Ridge National Laboratory (ORNL) in Oak Ridge, Tennessee and is line funded by the U. S. Department of Energy`s (DOE) Global Change Research Program (GCRP). CDIAC is an information analysis center (IAC). In operation since 1982, CDIAC identifies sources of primary data at national and international levels; obtains, archives, evaluates and distributes data and computer models; fully documents select data sets and computer models and offers them as numeric data packages (NDPs) and computer model packages (CMPs); distributes data and computer models on a variety of magnetic and electronic medias including 9-track magnetic tapes; IBM-formatted floppy diskettes; CD-ROM; and over Internet, Omnet, and Bitnet electronic networks; develops derived, often multidisciplinary data products useful for carbon cycle and climate-change research; distributes reports pertinent to greenhouse effect and climate change issues; produces the newsletter, CDIAC Communications; and in general acts as the information focus for the GCRPs research projects. Since its inception, CDIAC has responded to thousands of requests for information, and since 1985 has distributed more than 70,000 reports, NDPs and CMPs to 97 countries worldwide.

Boden, T.A.

1992-12-31T23:59:59.000Z

272

The global geochemical cycles of iron and calcium: using novel isotope systems to understand weathering, global mass budgets, natural reaction rates, and paleoclimate  

E-Print Network (OSTI)

in the sedimentary column, and diagenetic alteration of Ca isotope signals over geologic time scales. The overallThe global geochemical cycles of iron and calcium: using novel isotope systems to understand of Doctor of Philosophy in Geology in the GRADUATE DIVISION of the UNIVERSITY OF CALIFORNIA, BERKELEY

Fantle, Matthew

273

Lawrence Livermore National Laboratory interests and capabilities for research on the ecological effects of global climatic and atmospheric change  

Science Conference Proceedings (OSTI)

The Lawrence Livermore National Laboratory (LLNL) has interests and capabilities in all three types of research that must be conducted in order to understand and predict effects of global atmospheric and climatic (i.e., environmental) changes on ecological systems and their functions (ecosystem function is perhaps most conveniently defined as mass and energy exchange and storage). These three types of research are: (1) manipulative experiments with plants and ecosystems; (2) monitoring of present ecosystem, landscape, and global exchanges and pools of energy, elements, and compounds that play important roles in ecosystem function or the physical climate system, and (3) mechanistic (i.e., hierarchic and explanatory) modeling of plant and ecosystem responses to global environmental change. Specific experimental programs, monitoring plans, and modeling activities related to evaluation of ecological effects of global environmental change that are of interest to, and that can be carried out by LLNL scientists are outlined. Several projects have the distinction of integrating modeling with empirical studies resulting in an Integrated Product (a model or set of models) that DOE or any federal policy maker could use to assess ecological effects. The authors note that any scheme for evaluating ecological effects of atmospheric and climatic change should take into account exceptional or sensitive species, in particular, rare, threatened, or endangered species.

Amthor, J.S.; Houpis, J.L.; Kercher, J.R.; Ledebuhr, A.; Miller, N.L.; Penner, J.E.; Robison, W.L.; Taylor, K.E.

1994-09-01T23:59:59.000Z

274

Projected Changes in the Seasonal Cycle of Surface Temperature  

Science Conference Proceedings (OSTI)

When forced with increasing greenhouse gases, global climate models project a delay in the phase and a reduction in the amplitude of the seasonal cycle of surface temperature, expressed as later minimum and maximum annual temperatures and greater ...

John G. Dwyer; Michela Biasutti; Adam H. Sobel

2012-09-01T23:59:59.000Z

275

The Hydrologic Feedback Pathway for Land–Climate Coupling  

Science Conference Proceedings (OSTI)

The impact of improvements in land surface initialization and specification of observed rainfall in global climate model simulations of boreal summer are examined to determine how the changes propagate around the hydrologic cycle in the coupled ...

Paul A. Dirmeyer

2006-10-01T23:59:59.000Z

276

Seasonal Variations of Climate Feedbacks in the NCAR CCSM3  

Science Conference Proceedings (OSTI)

This study investigates the annual cycle of radiative contributions to global climate feedbacks. A partial radiative perturbation (PRP) technique is used to diagnose monthly radiative perturbations at the top of atmosphere (TOA) due to CO2 forcing;...

Patrick C. Taylor; Robert G. Ellingson; Ming Cai

2011-07-01T23:59:59.000Z

277

Alternative Approaches to Analyzing Greenhouse Gas Emissions and Global Climate Change in CEQA Documents  

E-Print Network (OSTI)

Global climate change (GCC) is a change in the average weather of the earth that can be measured by wind patterns, storms, precipitation, and temperature. This paper is not a scientific analysis of the existence or potential causes of GCC. Further, this paper does not address National Environmental Policy Act (NEPA) requirements. Instead, the intent of this paper is to provide practical, interim information to California Environmental Quality Act (CEQA) practitioners to help Lead Agencies determine how to address GCC in CEQA documents prior to the development and adoption of guidance by appropriate government agencies. A typical individual project does not generate enough greenhouse gas emissions to influence GCC significantly on its own; the issue of GCC is by definition a cumulative environmental impact. Therefore, if the Lead Agency chooses to address GCC effects in a CEQA document, it should be discussed in the context of a cumulative impact. A complicating factor, however, is that there are currently no published CEQA thresholds or approved methods for determining whether a project’s potential contribution to a cumulative GCC impact is considerable. This paper provides a summary of background information on GCC, the current regulatory environment surrounding greenhouse gas (GHG) emissions, and the various approaches that a Lead

Tony Held, Ph.D.; Terry Rivasplata; Tim Rimpo; Kenneth M. Bogdan

2007-01-01T23:59:59.000Z

278

Sensitivity of Global Climate Model Simulations to Increased Stomatal Resistance and C02 Increases*  

Science Conference Proceedings (OSTI)

Increasing levels of atmospheric CO2 will not only modify climate, they will also likely increase the water-use efficiency of plants by decreasing stomatal openings. The effect of the imposition of “doubled stomatal resistance” on climate is ...

A. Henderson-Sellers; K. McGuffie; C. Gross

1995-07-01T23:59:59.000Z

279

GFDL's CM2 Global Coupled Climate Models. Part II: The Baseline Ocean Simulation  

Science Conference Proceedings (OSTI)

The current generation of coupled climate models run at the Geophysical Fluid Dynamics Laboratory (GFDL) as part of the Climate Change Science Program contains ocean components that differ in almost every respect from those contained in previous ...

Anand Gnanadesikan; Keith W. Dixon; Stephen M. Griffies; V. Balaji; Marcelo Barreiro; J. Anthony Beesley; William F. Cooke; Thomas L. Delworth; Rudiger Gerdes; Matthew J. Harrison; Isaac M. Held; William J. Hurlin; Hyun-Chul Lee; Zhi Liang; Giang Nong; Ronald C. Pacanowski; Anthony Rosati; Joellen Russell; Bonita L. Samuels; Qian Song; Michael J. Spelman; Ronald J. Stouffer; Colm O. Sweeney; Gabriel Vecchi; Michael Winton; Andrew T. Wittenberg; Fanrong Zeng; Rong Zhang; John P. Dunne

2006-03-01T23:59:59.000Z

280

Consistency in Global Climate Change Model Predictions of Regional Precipitation Trends  

Science Conference Proceedings (OSTI)

Projections of human-induced climate change impacts arising from the emission of atmospheric chemical constituents such as carbon dioxide typically utilize multiple integrations (or ensembles) of numerous numerical climate change models to arrive ...

Bruce T. Anderson; Catherine Reifen; Ralf Toumi

2009-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "global climate cycle" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Effects of Cumulus Entrainment and Multiple Cloud Types on a January Global Climate Model Simulation  

Science Conference Proceedings (OSTI)

An improved version of the GISS Model II cumulus parameterization designed for long-term climate integrations is used to study the effects of entrainment and multiple cloud types on the January climate simulation. Instead of prescribing ...

Mao-Sung Yao; Anthony D. Del Genio

1989-08-01T23:59:59.000Z

282

Local action for the global environment : municipal government participation in a voluntary climate protection program  

E-Print Network (OSTI)

The Cities for Climate ProtectionTM (CCP) campaign is a voluntary environmental program for municipalities, which is increasingly being applied around the world by local governments taking action on climate change. This ...

Ravin, Amelia L., 1977-

2004-01-01T23:59:59.000Z

283

Recent Climate-Driven Increases in Vegetation Productivity for the Western Arctic: Evidence of an Acceleration of the Northern Terrestrial Carbon Cycle  

Science Conference Proceedings (OSTI)

Northern ecosystems contain much of the global reservoir of terrestrial carbon that is potentially reactive in the context of near-term climate change. Annual variability and recent trends in vegetation productivity across Alaska and northwest ...

J. S. Kimball; M. Zhao; A. D. McGuire; F. A. Heinsch; J. Clein; M. Calef; W. M. Jolly; S. Kang; S. E. Euskirchen; K. C. McDonald; S. W. Running

2007-02-01T23:59:59.000Z

284

Investigation of the Sensitivity of Water Cycle Components Simulated by the Canadian Regional Climate Model to the Land Surface Parameterization, the Lateral Boundary Data, and the Internal Variability  

Science Conference Proceedings (OSTI)

This study investigates the sensitivity of components of the hydrological cycle simulated by the Canadian Regional Climate Model (CRCM) to lateral boundary forcing, the complexity of the land surface scheme (LSS), and the internal variability ...

Biljana Music; Daniel Caya

2009-02-01T23:59:59.000Z

285

International impacts of global climate change: Testimony to House Appropriations Subcommittee on Foreign Operations, Export Financing and Related Programs  

SciTech Connect

International impacts of global climate change are those for which the important consequences arise because of national sovereignty. Such impacts could be of two types: (1) migrations across national borders of people, of resources (such as agricultural productivity, or surface water, or natural ecosystems), of effluents, or of patterns of commerce; and (2) changes to the way nations use and manage their resources, particularly fossil fuels and forests, as a consequence of international concern over the global climate. Actions by a few resource-dominant nations may affect the fate of all. These two types of international impacts raise complex equity issues because one nation may perceive itself as gaining at the expense of its neighbors, or it may perceive itself as a victim of the actions of others. 11 refs., 2 figs., 1 tab.

Fulkerson, W.; Cushman, R.M.; Marland, G.; Rayner, S.

1989-02-21T23:59:59.000Z

286

The Global Hydrologic and Energy Cycles: Suggestions for Studies in the Pre-Global Energy and Water Cycle Experiment (GEWEX) Period  

Science Conference Proceedings (OSTI)

Given the importance of a quantitative understanding of the way in which water and energy are moved from place to place and from component to component of the earth's climate system, it is necessary to obtain reliable estimates of the hydrologic ...

J. L. Kinter; J. Shukla

1990-02-01T23:59:59.000Z

287

Simulated diurnal rainfall physics in a multi-scale global climate model with embedded explicit convection  

E-Print Network (OSTI)

layer destabilization to local solar heating and evapo-the daily cycle of solar heating excites many atmospherictrop- ics) and surface solar heating cycles are weak (over

Pritchard, Michael Stephen

2011-01-01T23:59:59.000Z

288

The impact of climate, CO2, nitrogen deposition and land use change on simulated contemporary global river flow  

SciTech Connect

We investigated how climate, rising atmospheric CO2 concentration, increasing anthropogenic nitrogen deposition and land use change influenced continental river flow over the period 1948-2004 using the Community Land Model version 4 (CLM4) with coupled river transfer model (RTM), a global river routing scheme. The model results indicate that the global mean river flow shows significant decreasing trend and climate forcing likely functions as the dominant controller of the downward trend during the study period. Nitrogen deposition and land use change account for about 5% and 2.5% of the decrease in simulated global scale river flow, respectively, while atmospheric CO2 accounts for an upward trend. However, the relative role of each driving factor is heterogeneous across regions in our simulations. The trend in river flow for the Amazon River basin is primarily explained by CO2, while land use change accounts for 27.4% of the downward trend in river flow for the Yangtze rive basin. Our simulations suggest that to better understand the trends of river flow, it is not only necessary to take into account the climate, but also to consider atmospheric composition, carbon-nitrogen interaction and land use change, particularly for regional scales.

Shi, Xiaoying [ORNL; Mao, Jiafu [ORNL; Thornton, Peter E [ORNL; Hoffman, Forrest M [ORNL; Post, Wilfred M [ORNL

2011-01-01T23:59:59.000Z

289

Modeling the Recent Evolution of Global Drought and Projections for the Twenty-First Century with the Hadley Centre Climate Model  

Science Conference Proceedings (OSTI)

Meteorological drought in the Hadley Centre global climate model is assessed using the Palmer Drought Severity Index (PDSI), a commonly used drought index. At interannual time scales, for the majority of the land surface, the model captures the ...

Eleanor J. Burke; Simon J. Brown; Nikolaos Christidis

2006-10-01T23:59:59.000Z

290

A Classical-Theory-Based Parameterization of Heterogeneous Ice Nucleation by Mineral Dust, Soot, and Biological Particles in a Global Climate Model  

Science Conference Proceedings (OSTI)

An ice nucleation parameterization based on classical nucleation theory, with aerosol-specific parameters derived from experiments, has been implemented into a global climate model—the Community Atmosphere Model (CAM)-Oslo. The parameterization ...

Corinna Hoose; Jón Egill Kristjánsson; Jen-Ping Chen; Anupam Hazra

2010-08-01T23:59:59.000Z

291

Global distribution and climate forcing of marine organic aerosol: 1. Model improvements and evaluation  

Science Conference Proceedings (OSTI)

Marine organic aerosol emissions have been implemented and evaluated within the National Center of Atmospheric Research (NCAR)'s Community Atmosphere Model (CAM5) with the Pacific Northwest National Laboratory's 7-mode Modal Aerosol Module (MAM-7). Emissions of marine primary organic aerosols (POA), phytoplanktonproduced isoprene- and monoterpenes-derived secondary organic aerosols (SOA) and methane sulfonate (MS{sup -}) are shown to affect surface concentrations of organic aerosols in remote marine regions. Global emissions of submicron marine POA is estimated to be 7.9 and 9.4 Tg yr{sup -1}, for the Gantt et al. (2011) and Vignati et al. (2010) emission parameterizations, respectively. Marine sources of SOA and particulate MS{sup -} (containing both sulfur and carbon atoms) contribute an additional 0.2 and 5.1 Tg yr{sup -1}, respectively. Widespread areas over productive waters of the Northern Atlantic, Northern Pacific, and the Southern Ocean show marine-source submicron organic aerosol surface concentrations of 100 ngm{sup -3}, with values up to 400 ngm{sup -3} over biologically productive areas. Comparison of long-term surface observations of water insoluble organic matter (WIOM) with POA concentrations from the two emission parameterizations shows that despite revealed discrepancies (often more than a factor of 2), both Gantt et al. (2011) and Vignati et al. (2010) formulations are able to capture the magnitude of marine organic aerosol concentrations, with the Gantt et al. (2011) parameterization attaining better seasonality. Model simulations show that the mixing state of the marine POA can impact the surface number concentration of cloud condensation nuclei (CCN). The largest increases (up to 20 %) in CCN (at a supersaturation (S) of 0.2 %) number concentration are obtained over biologically productive ocean waters when marine organic aerosol is assumed to be externally mixed with sea-salt. Assuming marine organics are internally-mixed with sea-salt provides diverse results with increases and decreases in the concentration of CCN over different parts of the ocean. The sign of the CCN change due to the addition of marine organics to seasalt aerosol is determined by the relative significance of the increase in mean modal diameter due to addition of mass, and the decrease in particle hygroscopicity due to compositional changes in marine aerosol. Based on emerging evidence for increased CCN concentration over biologically active surface ocean areas/periods, our study suggests that treatment of sea spray in global climate models (GCMs) as an internal mixture of marine organic aerosols and sea-salt will likely lead to an underestimation in CCN number concentration.

Meskhidze, N.; Xu, J.; Gantt, Brett; Zhang, Yang; Nenes, Athanasios; Ghan, Steven J.; Liu, Xiaohong; Easter, Richard C.; Zaveri, Rahul A.

2011-11-23T23:59:59.000Z

292

Millennial timescale carbon cycle and climate change in an efficient Earth system model.  

E-Print Network (OSTI)

,501 GtC, estimates of the global recov- erable fossil fuel resource including oil shales range upwards

Edwards, Neil

293

GFDL’s ESM2 Global Coupled Climate–Carbon Earth System Models. Part II: Carbon System Formulation and Baseline Simulation Characteristics  

Science Conference Proceedings (OSTI)

The authors describe carbon system formulation and simulation characteristics of two new global coupled carbon–climate Earth System Models (ESM), ESM2M and ESM2G. These models demonstrate good climate fidelity as described in part I of this study ...

John P. Dunne; Jasmin G. John; Elena Shevliakova; Ronald J. Stouffer; John P. Krasting; Sergey L. Malyshev; P. C. D. Milly; Lori T. Sentman; Alistair J. Adcroft; William Cooke; Krista A. Dunne; Stephen M. Griffies; Robert W. Hallberg; Matthew J. Harrison; Hiram Levy; Andrew T. Wittenberg; Peter J. Phillips; Niki Zadeh

2013-04-01T23:59:59.000Z

294

The Response of the Polar Regions to Increased CO2 in a Global Climate Model with Elastic–Viscous–Plastic Sea Ice  

Science Conference Proceedings (OSTI)

A global atmosphere–ocean–sea ice general circulation model (GCM) is used in simulations of climate with present-day atmospheric CO2 concentrations, and with CO2 increasing to double the present-day values. The Parallel Climate Model includes the ...

John W. Weatherly; Yuxia Zhang

2001-02-01T23:59:59.000Z

295

Terrestrial carbon cycle - climate relations in eight CMIP5 earth system models  

Science Conference Proceedings (OSTI)

Eight Earth System Models from the Coupled Model Intercomparison Project (CMIP5) are evaluated, focusing on both the net carbon dioxide flux and its components, and their relation with climatic variables (temperature, precipitation and soil ...

Pu Shao; Xubin Zeng; Koichi Sakaguchi; Russell K. Monson; Xiaodong Zeng

296

Transient Climate Change Simulations with a Coupled Atmosphere–Ocean GCM Including the Tropospheric Sulfur Cycle  

Science Conference Proceedings (OSTI)

The time-dependent climate response to changing concentrations of greenhouse gases and sulfate aerosols is studied using a coupled general circulation model of the atmosphere and the ocean (ECHAM4/OPYC3). The concentrations of the well-mixed ...

E. Roeckner; L. Bengtsson; J. Feichter; J. Lelieveld; H. Rodhe

1999-10-01T23:59:59.000Z

297

Climate Model–Simulated Diurnal Cycles in HIRS Clear-Sky Brightness Temperatures  

Science Conference Proceedings (OSTI)

Clear-sky brightness temperature measurements from the High-Resolution Infrared Radiation Sounder (HIRS) are simulated with two climate models via a radiative transfer code. The models are sampled along the HIRS orbit paths to derive diurnal ...

Ian A. MacKenzie; Simon F. B. Tett; Anders V. Lindfors

2012-09-01T23:59:59.000Z

298

Climate Collections  

NLE Websites -- All DOE Office Websites (Extended Search)

Regional/Global > Climate Collections Regional/Global > Climate Collections Climate Collections Overview Climate encompasses the statistics of temperature, humidity, atmospheric pressure, wind, rainfall, atmospheric particle count, and numerous other meteorological elements in a given region over long periods of time. Climate can be contrasted to weather, which is the present condition of these same elements over periods up to two weeks. The climate collections project includes data sets containing measured and modeled values for variables such as temperature, precipitation, humidity, radiation, wind velocity, and cloud cover and include station measurements as well as gridded mean values. The ORNL DAAC Climate Collections Data archive includes 10 data products from the following categories:

299

GLOBAL BIOGEOCHEMICAL CYCLES, VOL. 7, NO. 3, PAGES 557-597, SEPTEMBER 1993 GLOBAL ANALYSIS OF THE POTENTIAL FOR  

E-Print Network (OSTI)

for the controls are derived from global gridded (løxl ø resolution) data basesof soil type, soil texture, NDVI uncertainty regarding the distribution and magnitude of the sourcesthemselves. For sometime it was thought #12 was combustion of fossil fuels, in particular, coalburning power plantsproducing electricity [Hao et al., 1987

Fridlind, Ann

300

Role of aerosols in radiative forcing of climate change: Global mean and uncertainties  

SciTech Connect

Anthropogenically induced climate change is of great current interest because of increases in atmospheric loading of infrared active (greenhouse) gases over the past 150 years and the inferred resultant increase in infrared radiation flux in the troposphere. However, the climate change ascribed to such increases, not to mention predictions of future climate change in response to prospective changes in the earth`s radiation budget, is based virtually entirely on climate model simulations of how the earth`s climate would respond to changes in radiation rather than on empirically established relationships between changes in the earth`s radiation budget and climate change. There is thus an urgent need to evaluate the performance of climate models to ascertain the accuracy with which they represent the changes in temperature and other indicia of climate that have been observed over the industrial period. Such an evaluation, however, requires an accurate assessment of the totality of changes in the earth`s radiation budget in both the longwave (thermal infrared) and shortwave (solar) spectral regions, not just of changes in the longwave due to increased concentrations of long-lived greenhouse gases.

Schwartz, S.E.

1998-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "global climate cycle" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Implications for the creation of warm saline deep water: Late Paleocene reconstructions and global climate model simulations  

SciTech Connect

A global warming trend began during the late Paleocene that culminated in the early Eocene with the highest global temperatures of the Cenozoic. We have reconstructed late Paleocene surfacial boundary conditions and modeled atmospheric conditions using the Goddard Institute for Space Studies general circulation model version II (GISS GCM II). These experiments were conducted to test the hypothesis that warm saline deep water formed during the late paleocene and to understand atmospheric circulation near the beginning of a period of global warming. The warming is attributed primarily to increased sea surface temperatures at high latitudes. The sensitivity of the climate to ocean temperature was tested using two sea surface temperature distributions, each delimited latitudinally by oxygen isotope values, but with different east-west gradients. The simulations discussed here contain several features unique among warm climate experiments. The first experiment (P-1) used latitudinally constant (zonal) sea surface temperatures. The zonally distributed sea surface temperatures strengthen the general circulation of the atmosphere. In particular, Hadley Cell circulation is intensified, leading to extremes of precipitation in the equatorial region and extreme evaporation across subtropical oceans. The unusual results prompted a second experiment with modern east-west sea surface temperature gradients superimposed and referred to as P-Gradient (P-Grad). 84 refs., 10 figs., 4 tabs.

O`Connell, S. [Wesleyan Univ., Middletown, CT (United States); Chandler, M.A. [Columbia Univ., New York, NY (United States)]|[Goddard Inst. of Space Studies, New York, NY (United States); Ruedy, R. [Goddard Inst. of Space Studies, New York, NY (United States)

1996-03-01T23:59:59.000Z

302

Berkeley Lab Scientific Programs: Climate Change and Environmental Science  

NLE Websites -- All DOE Office Websites (Extended Search)

Climate Change and Environmental Science Climate image Earth scientists study global climate with the help of computational models At Berkeley Lab, climate scientists, geologists, microbiologists, computer scientists, and engineers tackle some of the planet's most pressing issues. Climate modeling Lab scientists are creating a new kind of climate model that integrates cutting-edge climate science, such as the pioneering work on the carbon cycle conducted at Berkeley Lab. The goal is not to predict climate alone but interactions among climate, water, and energy on a global scale. It will be able to incorporate fresh data and generate new scenarios at any point: energy demand and carbon emissions; changes in the composition of the atmosphere and the heat entering and leaving it; impacts on ecosystems

303

The Footprint of Urban Areas on Global Climate as Characterized by MODIS  

Science Conference Proceedings (OSTI)

One mechanism for climate change is the collected impact of changes in land cover or land use. Such changes are especially significant in urban areas where much of the world’s population lives. Satellite observations provide a basis for ...

Menglin Jin; Robert E. Dickinson; Da Zhang

2005-05-01T23:59:59.000Z

304

Weather, Climate, and the Economy: Explaining Risk Perceptions of Global Warming, 2001–10  

Science Conference Proceedings (OSTI)

Two series of national survey datasets (2001–10), supplemented with monthly temperature and precipitation data and unemployment data, are used to examine how weather and climate, economic performance, and individuals’ sociodemographic backgrounds ...

Wanyun Shao; Barry D. Keim; James C. Garand; Lawrence C. Hamilton

2014-01-01T23:59:59.000Z

305

Crop water stress under climate change uncertainty : global policy and regional risk  

E-Print Network (OSTI)

Fourty percent of all crops grown in the world today are grown using irrigation, and shifting precipitation patterns due to climate change are viewed as a major threat to food security. This thesis examines, in the framework ...

Gueneau, Arthur

2012-01-01T23:59:59.000Z

306

The economic impact of global climate and tropospheric oxone on world agricultural production  

E-Print Network (OSTI)

The objective of my thesis is to analyze the economic impact on agriculture production from changes in climate and tropospheric ozone, and related policy interventions. The analysis makes use of the Emissions Prediction ...

Wang, Xiaodu

2005-01-01T23:59:59.000Z

307

ISCCP Global Radiance Data Set: A New Resource for Climate Research  

Science Conference Proceedings (OSTI)

The Operational data-collection phase of the International Satellite Cloud Climatology Project(ISCCP) began in July 1983 as an element of the World Climate Research Program (WCRP). Since then, raw images from an international network of ...

R. A. Schiffer; W. B. Rossow

1985-12-01T23:59:59.000Z

308

Downscaling of Global Climate Change Estimates to Regional Scales: An Application to Iberian Rainfall in Wintertime  

Science Conference Proceedings (OSTI)

A statistical strategy to deduct regional-scale features from climate general circulation model (GCM) simulations has been designed and tested. The main idea is to interrelate the characteristic patterns of observed simultaneous variations of ...

Hans von Storch; Eduardo Zorita; Ulrich Cubasch

1993-06-01T23:59:59.000Z

309

Evaluating the Consistency between Statistically Downscaled and Global Dynamical Model Climate Change Projections  

Science Conference Proceedings (OSTI)

The consistency between rainfall projections obtained from direct climate model output and statistical downscaling is evaluated. Results are averaged across an area large enough to overcome the difference in spatial scale between these two types ...

B. Timbal; P. Hope; S. Charles

2008-11-01T23:59:59.000Z

310

From Short-Scale Atmospheric Variability to Global Climate Dynamics: Toward a Systematic Theory of Averaging  

Science Conference Proceedings (OSTI)

Traditionally, climate is defined by the properties of the averages of the meteorological fields over an appropriate time interval. In this paper the properties of the time-averaged observables of a red noise atmosphere and of a simplified model ...

C. Nicolis; G. Nicolis

1995-06-01T23:59:59.000Z

311

Stability of Antarctic Bottom Water Formation to Freshwater Fluxes and Implications for Global Climate  

Science Conference Proceedings (OSTI)

The stability of Antarctic Bottom Water (AABW) to freshwater (FW) perturbations is investigated in a coupled climate model of intermediate complexity. It is found that AABW is stable to surface freshwater fluxes greater in volume and rate to ...

Jessica Trevena; Willem P. Sijp; Matthew H. England

2008-07-01T23:59:59.000Z

312

Reanalyses-Based Tropospheric Temperature Estimates: Uncertainties in the Context of Global Climate Change Detection  

Science Conference Proceedings (OSTI)

Uncertainties in estimates of tropospheric mean temperature were investigated in the context of climate change detection through comparisons of the National Centers for Environmental Prediction–National Center for Atmospheric Research (NCEP–NCAR) ...

Muthuvel Chelliah; C. F. Ropelewski

2000-09-01T23:59:59.000Z

313

Influence of Cirrus Clouds on Weather and Climate Processes: A Global Perspective  

Science Conference Proceedings (OSTI)

Current understanding and knowledge of the composition and structure of cirrus clouds are reviewed and documented in this paper. In addition, the radiative properties of cirrus clouds as they relate to weather and climate processes are described ...

Kuo-Nan Liou

1986-06-01T23:59:59.000Z

314

Terrestrial Vegetation Dynamics and Global Climate Controls in North America: 2001–05  

Science Conference Proceedings (OSTI)

Monthly composite data from the Moderate Resolution Imaging Spectroradiometer (MODIS) satellite sensor was used to reconstruct vegetation dynamics in response to climate patterns over the period 2001–05 for North America. Results imply that plant ...

Christopher Potter; Shyam Boriah; Michael Steinbach; Vipin Kumar; Steven Klooster

2008-07-01T23:59:59.000Z

315

The climate impacts of high-speed rail and air transportation : a global comparative analysis  

E-Print Network (OSTI)

Growing concerns about the energy use and climate impacts of the transportation sector have prompted policymakers to consider a variety of options to meet the future mobility needs of the world's population, while ...

Clewlow, Regina Ruby Lee

2012-01-01T23:59:59.000Z

316

The dynamics of technology diffusion and the impacts of climate policy instruments in the decarbonisation of the global electricity sector  

E-Print Network (OSTI)

This paper presents an analysis of possible uses of climate policy instruments for the decarbonisation of the global electricity sector in a non-equilibrium economic and technology innovation-diffusion perspective. Emissions reductions occur through changes in technology and energy consumption; in this context, investment decision-making opportunities occur periodically, which energy policy can incentivise in order to transform energy systems and meet reductions targets. Energy markets are driven by innovation, dynamic costs and technology diffusion; yet, the incumbent systems optimisation methodology in energy modelling does not address these aspects nor the effectiveness of policy onto decision-making since the dynamics modelled take their source from the top-down `social-planner' assumption. This leads to an underestimation of strong technology lock-ins in cost-optimal scenarios of technology. Our approach explores the global diffusion of low carbon technology in connection to a highly disaggregated sector...

Mercure, J -F; Foley, A M; Chewpreecha, U; Pollitt, H

2013-01-01T23:59:59.000Z

317

Index Cycles in the Northern Hemisphere during the Global Weather Experiment  

Science Conference Proceedings (OSTI)

An index cycle occurring in the Northern Hemisphere during the late winter and spring of 1979 has been examined in detail using the ECMWF Level IIIb data set.

John W. Kidson

1985-04-01T23:59:59.000Z

318

Effects of soot-induced snow albedo change on snowpack and hydrological cycle in western United States based on Weather Research and Forecasting chemistry and regional climate simulations  

Science Conference Proceedings (OSTI)

Radiative forcing induced by soot on snow is a major anthropogenic forcing affecting the global climate. However, it is uncertain how the soot-induced snow albedo perturbation affects regional snowpack and the hydrological cycle. In this study we simulated the deposition of soot aerosol on snow and investigated the resulting impact on snowpack and the surface water budget in the western United States. A yearlong simulation was performed using the chemistry version of the Weather Research and Forecasting model (WRF-Chem) to determine an annual budget of soot deposition, followed by two regional climate simulations using WRF in meteorology-only mode, with and without the soot-induced snow albedo perturbations. The chemistry simulation shows large spatial variability in soot deposition that reflects the localized emissions and the influence of the complex terrain. The soot-induced snow albedo perturbations increase the net solar radiation flux at the surface during late winter to early spring, increase the surface air temperature, reduce snow water equivalent amount, and lead to reduced snow accumulation and less spring snowmelt. These effects are stronger over the central Rockies and southern Alberta, where soot deposition and snowpack overlap the most. The indirect forcing of soot accelerates snowmelt and alters stream flows, including a trend toward earlier melt dates in the western United States. The soot-induced albedo reduction initiates a positive feedback process whereby dirty snow absorbs more solar radiation, heating the surface and warming the air. This warming causes reduced snow depth and fraction, which further reduces the regional surface albedo for the snow covered regions. Our simulations indicate that the change of maximum snow albedo induced by soot on snow contributes to 60% of the net albedo reduction over the central Rockies. Snowpack reduction accounts for the additional 40%.

Qian, Yun; Gustafson, William I.; Leung, Lai-Yung R.; Ghan, Steven J.

2009-02-14T23:59:59.000Z

319

Carbon Cycle 2.0  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Carbon Cycle 2.0 Carbon Cycle 2.0 Pioneering science for sustainable energy solutions Artificial Photosynthesis Energy Storage Combustion Carbon Capture & Storage Developing World Efficiency Photovoltaics Biofuels Energy Analysis Climate Modeling Carbon Cycle 2.0 is... 1. A vision for * a global energy system integrated with the Earth's natural carbon cycles * an interactive Berkeley Lab environment with a shared sense of purpose 2. A program development plan that will allow us to deepen our capabilities and provide more opportunities to have impact 3. An attempt to integrate our basic research with applications using models of technology deployment constraints 4. Set of internal activities aimed at priming the effort

320

Impact of Historical Climate Change on the Southern Ocean Carbon Cycle  

Science Conference Proceedings (OSTI)

Climate change over the last several decades is suggested to cause a decrease in the magnitude of the uptake of CO2 by the Southern Ocean (Le Quere et al.). In this study, the atmospheric fields from NCEP R1 for the years 1948–2003 are used to ...

R. J. Matear; A. Lenton

2008-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "global climate cycle" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Stable Atmospheric Boundary Layers and Diurnal Cycles: Challenges for Weather and Climate Models  

Science Conference Proceedings (OSTI)

The representation of the atmospheric boundary layer is an important part of weather and climate models and impacts many applications such as air quality and wind energy. Over the years, the performance in modeling 2-m temperature and 10-m wind speed has ...

A. A. M. Holtslag; G. Svensson; P. Baas; S. Basu; B. Beare; A. C. M. Beljaars; F. C. Bosveld; J. Cuxart; J. Lindvall; G. J. Steeneveld; M. Tjernström; B. J. H. Van De Wiel

2013-11-01T23:59:59.000Z

322

A Possible Marine Mechanism for Internally Generated Long-Period Climate Cycles  

Science Conference Proceedings (OSTI)

By reinterpreting the “sea-ice extent” discussed in a recently proposed model of auto-oscillatory climatic change (Saltzman et al., 1981) to represent high-inertia grounded and shelf sea ice forms, instead of thinner marine ice forms, it is ...

Barry Saltzman; Alfonso Sutera; Anthony R. Hansen

1982-11-01T23:59:59.000Z

323

Climate mitigation’s impact on global and regional electric power sector water use in the 21st Century  

SciTech Connect

Over the course of this coming century, global electricity use is expected to grow at least five fold and if stringent greenhouse gas emissions controls are in place the growth could be more than seven fold from current levels. Given that the electric power sector represents the second largest anthropogenic use of water and given growing concerns about the nature and extent of future water scarcity driven by population growth and a changing climate, significant concern has been expressed about the electricity sector’s use of water going forward. In this paper, the authors demonstrate that an often overlooked but absolutely critical issue that needs to be taken into account in discussions about the sustainability of the electric sector’s water use going forward is the tremendous turn over in electricity capital stock that will occur over the course of this century; i.e., in the scenarios examined here more than 80% of global electricity production in the year 2050 is from facilities that have not yet been built. The authors show that because of the large scale changes in the global electricity system, the water withdrawal intensity of electricity production is likely to drop precipitously with the result being relatively constant water withdrawals over the course of the century even in the face of the large growth in electricity usage. The ability to cost effectively reduce the water intensity of power plants with carbon dioxide capture and storage systems in particular is key to constraining overall global water use.

Dooley, James J.; Kyle, G. Page; Davies, Evan

2013-08-05T23:59:59.000Z

324

Global climate change: Some implications, opportunities, and challenges for US forestry  

SciTech Connect

It is widely agreed that the concentration of greenhouse gases in the earth's atmosphere is increasing, that this increase is a consequence of man's activities, and that there is significant risk that this will lead to changes in the earth's climate. The question is now being discussed what, if anything, we should be doing to minimize and/or adapt to changes in climate. Virtually every statement on this matter; from the US Office of Technology Assessment, to the National Academy of Science, to the Nairobi Declaration on Climatic Change, includes some recommendation for planting and protecting forests. In fact, forestry is intimately involved in the climate change debate for several reasons: changing climate patterns will affect existing forests, tropical deforestation is one of the major sources of greenhouse gases to the atmosphere, reforestation projects could remove additional carbon dioxide from the atmosphere and there is renewed interest in wood-based or other renewable fuels to replace fossil fuels. Part of the enthusiasm for forestry-related strategies in a greenhouse context is the perception that forests not only provide greenhouse benefits but also serve other desirable social objectives. This discussion will explore the current range of thinking in this area and try to stimulate additional thinking on the rationality of the forestry-based approaches and the challenges posed for US forestry.

Marland, G.

1991-01-01T23:59:59.000Z

325

Analysis of the Arctic System for Freshwater Cycle Intensification: Observations and Expectations  

Science Conference Proceedings (OSTI)

Hydrologic cycle intensification is an expected manifestation of a warming climate. Although positive trends in several global average quantities have been reported, no previous studies have documented broad intensification across elements of the ...

Michael A. Rawlins; Michael Steele; Marika M. Holland; Jennifer C. Adam; Jessica E. Cherry; Jennifer A. Francis; Pavel Ya Groisman; Larry D. Hinzman; Thomas G. Huntington; Douglas L. Kane; John S. Kimball; Ron Kwok; Richard B. Lammers; Craig M. Lee; Dennis P. Lettenmaier; Kyle C. McDonald; Erika Podest; Jonathan W. Pundsack; Bert Rudels; Mark C. Serreze; Alexander Shiklomanov; Řystein Skagseth; Tara J. Troy; Charles J. Vörösmarty; Mark Wensnahan; Eric F. Wood; Rebecca Woodgate; Daqing Yang; Ke Zhang; Tingjun Zhang

2010-11-01T23:59:59.000Z

326

Multiscale Interactions in the Life Cycle of a Tropical Cyclone Simulated in a Global Cloud-System-Resolving Model. Part II: System-Scale and Mesoscale Processes  

Science Conference Proceedings (OSTI)

The life cycle of Tropical Storm Isobel was simulated reasonably well in the Nonhydrostatic Icosahedral Atmospheric Model (NICAM), a global cloud-system-resolving model. The evolution of the large-scale circulation and the storm-scale structure ...

Hironori Fudeyasu; Yuqing Wang; Masaki Satoh; Tomoe Nasuno; Hiroaki Miura; Wataru Yanase

2010-12-01T23:59:59.000Z

327

The Importance of Ice Vertical Resolution for Snowball Climate and Deglaciation  

Science Conference Proceedings (OSTI)

Sea ice schemes with a few vertical levels are typically used to simulate the thermodynamic evolution of sea ice in global climate models. Here it is shown that these schemes overestimate the magnitude of the diurnal surface temperature cycle by ...

Dorian S. Abbot; Ian Eisenman; Raymond T. Pierrehumbert

2010-11-01T23:59:59.000Z

328

Institutions, public policy and the product life cycle : the globalization of biomanufacturing and implications for Massachusetts  

E-Print Network (OSTI)

Globalization has brought about a major shift in our understanding of how companies organize themselves and how they compete. The fragmentation of firms in their scope and structure, the vertical disintegration of firms ...

Reynolds, Elisabeth B

2010-01-01T23:59:59.000Z

329

Prediction of the Life Cycle of a Supertyphoon with a High-Resolution Global Model  

Science Conference Proceedings (OSTI)

The life cycle of Supertyphoon Hope (1979) from a tropical depression stage to intensification and its eventual weakening after land-fall, some 6 days later, is followed in a real-data numerical prediction experiment. The predictions are carried ...

T. N. Krishnamurti; D. Oosterhof

1989-10-01T23:59:59.000Z

330

Estimating future global per capita water availability based on changes in climate and population  

Science Conference Proceedings (OSTI)

Human populations are profoundly affected by water stress, or the lack of sufficient per capita available freshwater. Water stress can result from overuse of available freshwater resources or from a reduction in the amount of available water due to decreases ... Keywords: Climate change impacts, Population growth, Resource scarcity, Water availability

Esther S. Parish; Evan Kodra; Karsten Steinhaeuser; Auroop R. Ganguly

2012-05-01T23:59:59.000Z

331

Simulation and Projection of Arctic Freshwater Budget Components by the IPCC AR4 Global Climate Models  

Science Conference Proceedings (OSTI)

The state-of-the-art AOGCM simulations have recently (late 2004–early 2005) been completed for the Intergovernmental Panel on Climate Change (IPCC) in order to provide input to the IPCC’s Fourth Assessment Report (AR4). The present paper ...

Vladimir M. Kattsov; John E. Walsh; William L. Chapman; Veronika A. Govorkova; Tatyana V. Pavlova; Xiangdong Zhang

2007-06-01T23:59:59.000Z

332

Advancing Global-and Continental-Scale Hydrometeorology: Contributions of GEWEX Hydrometeorology Panel  

Science Conference Proceedings (OSTI)

Over the past 9 years, the Global Energy and Water Cycle Experiment (GEWEX), under the auspices of the World Climate Research Programme (WCRP), has coordinated the activities of the Continental Scale Experiments (CSEs) and other related research ...

R. G. Lawford; R. Stewart; J. Roads; H-J. Isemer; M. Manton; J. Marengo; T. Yasunari; S. Benedict; T. Koike; S. Williams

2004-12-01T23:59:59.000Z

333

On Numerical Simulation of the Global Distribution of Sulfate Aerosol Produced by a Large Volcanic Eruption  

Science Conference Proceedings (OSTI)

Volcanic eruptions play an important role in the global sulfur cycle of the earth's atmosphere and have a relatively big influence on potential fluctuations of the atmospheric variables on both subclimatic and climatic scales. The objective of ...

J. A. Pudykiewicz; A. P. Dastoor

1995-03-01T23:59:59.000Z

334

The CALIPSO Mission: A Global 3D View of Aerosols and Clouds  

Science Conference Proceedings (OSTI)

Aerosols and clouds have important effects on Earth's climate through their effects on the radiation budget and the cycling of water between the atmosphere and Earth's surface. Limitations in our understanding of the global distribution and ...

D. M. Winker; J. Pelon; J. A. Coakley Jr.; S. A. Ackerman; R. J. Charlson; P. R. Colarco; P. Flamant; Q. Fu; R. M. Hoff; C. Kittaka; T. L. Kubar; H. Le Treut; M. P. McCormick; G. Mégie; L. Poole; K. Powell; C. Trepte; M. A. Vaughan; B. A. Wielicki

2010-09-01T23:59:59.000Z

335

Integration of Space and In Situ Observations to Study Global Climate Change  

Science Conference Proceedings (OSTI)

The currently available model-based global data sets of atmospheric circulation are a by-product of the daily requirement of producing initial conditions for numerical weather prediction (NWP) models. These data sets have been quite useful for ...

L. Bengtsson; J. Shukla

1988-10-01T23:59:59.000Z

336

Modes of Global Climate Variability during Marine Isotope Stage 3 (60–26 ka)  

Science Conference Proceedings (OSTI)

Recent analysis of 38 globally distributed paleoclimatic records covering Marine Isotope Stage 3 (MIS 3) 60–26 ka demonstrated that the two leading empirical orthogonal functions (EOFs) explaining the data are the Greenland ice-core signal (“...

Nicklas G. Pisias; Peter U. Clark; Edward J. Brook

2010-03-01T23:59:59.000Z

337

Stable Isotopes as Validation Tools for Global Climate Model Predictions of the Impact of Amazonian Deforestation  

Science Conference Proceedings (OSTI)

This paper examines changes in isotopic abundances for 18O and deuterium in precipitation over the Amazon basin based on data in the Global Network on Isotopes in Precipitation (GNIP) database from the International Atomic Energy Agency (IAEA)/...

A. Henderson-Sellers; K. McGuffie; H. Zhang

2002-09-01T23:59:59.000Z

338

Impact of Climate Change on the Future Chemical Composition of the Global Troposphere  

Science Conference Proceedings (OSTI)

A global chemical transport model of the atmosphere [the Model for Ozone and Related Tracers, version 2 (MOZART-2)] driven by prescribed surface emissions and by meteorological fields provided by the ECHAM5/Max Planck Institute Ocean Model (MPI-...

Guy P. Brasseur; Martin Schultz; Claire Granier; Marielle Saunois; Thomas Diehl; Michael Botzet; Erich Roeckner; Stacy Walters

2006-08-01T23:59:59.000Z

339

Reducing the Carbon Footprint of Commercial Refrigeration Systems Using Life Cycle Climate Performance Analysis: From System Design to Refrigerant Options  

SciTech Connect

In this paper, Life Cycle Climate Performance (LCCP) analysis is used to estimate lifetime direct and indirect carbon dioxide equivalent gas emissions of various refrigerant options and commercial refrigeration system designs, including the multiplex DX system with various hydrofluorocarbon (HFC) refrigerants, the HFC/R744 cascade system incorporating a medium-temperature R744 secondary loop, and the transcritical R744 booster system. The results of the LCCP analysis are presented, including the direct and indirect carbon dioxide equivalent emissions for each refrigeration system and refrigerant option. Based on the results of the LCCP analysis, recommendations are given for the selection of low GWP replacement refrigerants for use in existing commercial refrigeration systems, as well as for the selection of commercial refrigeration system designs with low carbon dioxide equivalent emissions, suitable for new installations.

Fricke, Brian A [ORNL; Abdelaziz, Omar [ORNL; Vineyard, Edward Allan [ORNL

2013-01-01T23:59:59.000Z

340

Life Cycle Assessment of the Energy Independence and Security Act of 2007: Ethanol - Global Warming Potential and Environmental Emissions  

DOE Green Energy (OSTI)

The objective of this study is to use life cycle assessment (LCA) to evaluate the global warming potential (GWP), water use, and net energy value (NEV) associated with the EISA-mandated 16 bgy cellulosic biofuels target, which is assumed in this study to be met by cellulosic-based ethanol, and the EISA-mandated 15 bgy conventional corn ethanol target. Specifically, this study compares, on a per-kilometer-driven basis, the GWP, water use, and NEV for the year 2022 for several biomass feedstocks.

Heath, G. A.; Hsu, D. D.; Inman, D.; Aden, A.; Mann, M. K.

2009-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "global climate cycle" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Climate Action Plan (Kentucky)  

Energy.gov (U.S. Department of Energy (DOE))

The Commonwealth of Kentucky established the Kentucky Climate Action Plan Council (KCAPC) process to identify opportunities for Kentucky to respond to the challenge of global climate change while...

342

Beyond climate-smart agriculture: toward safe operating spaces for global food systems  

SciTech Connect

Agriculture is considered to be climate-smart when it contributes to increasing food security, adaptation and mitigation in a sustainable way. This new concept now dominates current discussions in agricultural development because of its capacity to unite the agendas of the agriculture, development and climate change communities under one brand. In this opinion piece authored by scientists from a variety of international agricultural and climate research communities, we argue that the concept needs to be evaluated critically because the relationship between the three dimensions is poorly understood, such that practically any improved agricultural practice can be considered climate-smart. This lack of clarity may have contributed to the broad appeal of the concept. From the understanding that we must hold ourselves accountable to demonstrably better meet human needs in the short and long term within foreseeable local and planetary limits, we develop a conceptualization of climate-smart agriculture as agriculture that can be shown to bring us closer to safe operating spaces for agricultural and food systems across spatial and temporal scales. Improvements in the management of agricultural systems that bring us significantly closer to safe operating spaces will require transformations in governance and use of our natural resources, underpinned by enabling political, social and economic conditions beyond incremental changes. Establishing scientifically credible indicators and metrics of long-term safe operating spaces in the context of a changing climate and growing social-ecological challenges is critical to creating the societal demand and political will required to motivate deep transformations. Answering questions on how the needed transformational change can be achieved will require actively setting and testing hypotheses to refine and characterize our concepts of safer spaces for social-ecological systems across scales. This effort will demand prioritizing key areas of innovation, such as (1) improved adaptive management and governance of social-ecological systems; (2) development of meaningful and relevant integrated indicators of social-ecological systems; (3) gathering of quality integrated data, information, knowledge and analytical tools for improved models and scenarios in time frames and at scales relevant for decision-making; and (4) establishment of legitimate and empowered science policy dialogues on local to international scales to facilitate decision making informed by metrics and indicators of safe operating spaces.

Gulledge, Jay [ORNL; Neufeldt, Heinrich [ORNL; Jahn, Margaret M [ORNL; Lezaks, David P [ORNL; Meinke, Jan H [ORNL; Scholes, Robert J [ORNL

2013-01-01T23:59:59.000Z

343

Time-Varying Climate Sensitivity from Regional Feedbacks  

Science Conference Proceedings (OSTI)

The sensitivity of global climate with respect to forcing is generally described in terms of the global climate feedback—the global radiative response per degree of global annual mean surface temperature change. While the global climate feedback ...

Kyle C. Armour; Cecilia M. Bitz; Gerard H. Roe

2013-07-01T23:59:59.000Z

344

Modeling U.S. Energy Use Changes with Global Climate Change  

Science Conference Proceedings (OSTI)

Using a general circulation model of Earth climate (PCM-IBIS) to drive an energy use model (DD-NEMS), we calculated the energy use changes for each year from 2003-2025 for the nine U.S. Census regions. We used five scenarios: 1) a reference with no change in temperatures from the 1970-2003 average, 2) a gradual 1 F rise in temperature by 2025, 3) a gradual 3 F rise by 2025, 4) a climate simulation with low temperature response to CO2 doubling in the atmosphere, and 5) a climate simulation with a more extreme response. The low-?T scenario had a cumulative reduction in energy of 2.1 Quads but an increase in cost of $14.8 billion. The northern states had reductions in cost over the entire period, but most other regions had increases in costs because increases in cooling costs outweighed reductions in heating and other energy uses. Higher temperature sensitivity resulted in increased warming, especially in the winter months. Because heating needs decreased, total energy requirements declined by a cumulative 4.2 Quads. However, total cost still increased $6.1 billion and carbon emissions still rose as coal-based electricity for cooling needs grew.

Hadley, Stanton W [ORNL; Erickson III, David J [ORNL; Hernandez Figueroa, Jose L [ORNL

2006-09-01T23:59:59.000Z

345

Continental-Scale River Flow in Climate Models  

Science Conference Proceedings (OSTI)

The hydrologic cycle is a major part of the global climate system. There is an atmospheric flux of water from the ocean surface to the continents. The cycle is closed by return flow in rivers. In this paper a river routing model is developed to ...

James R. Miller; Gary L. Russell; Guilherme Caliri

1994-06-01T23:59:59.000Z

346

Statistical Prediction of January-February Mean Northern Hemisphere Lower Tropospheric Climate from the 11-Year Solar Cycle and the Southern Oscillation for West and East QBO Phases  

Science Conference Proceedings (OSTI)

The association between the 11-year solar cycle and the tropospheric Northern Hemisphere climate in January-February for the 21 west QBO phase years in the 1951–88 period failed strongly in 1989. This failure is explained in part by the high ...

Anthony G. Barnston; Robert E. Livezey

1991-02-01T23:59:59.000Z

347

A Global View on the Wind Sea and Swell Climate and Variability from ERA-40  

Science Conference Proceedings (OSTI)

In this paper a detailed global climatology of wind-sea and swell parameters, based on the 45-yr European Centre for Medium-Range Weather Forecasts Re-Analysis (ERA-40) wave reanalysis is presented. The spatial pattern of the swell dominance of ...

Alvaro Semedo; Kay Sušelj; Anna Rutgersson; Andreas Sterl

2011-03-01T23:59:59.000Z

348

The Atlantic Climate Change Program  

Science Conference Proceedings (OSTI)

The Atlantic Climate Change Program (ACCP) is a component of NOAA's Climate and Global Change Program. ACCP is directed at determining the role of the thermohaline circulation of the Atlantic Ocean on global atmospheric climate. Efforts and ...

Robert L. Molinari; David Battisti; Kirk Bryan; John Walsh

1994-07-01T23:59:59.000Z

349

Simulating the Impact of Climate Change on Runoff in a Typical River Catchment of the Loess Plateau, China  

Science Conference Proceedings (OSTI)

Global warming will have direct impacts on regional water resources by accelerating the hydrological cycle. Hydrological simulation is an important approach to studying climate change impacts. In this paper, a snowmelt-based water balance model (...

G. Q. Wang; J. Y. Zhang; Y. Q. Xuan; J. F. Liu; J. L. Jin; Z. X. Bao; R. M. He; C. S. Liu; Y. L. Liu; X. L. Yan

2013-10-01T23:59:59.000Z

350

Simulating the Impact of Climate Change on Runoff in a Typical River Catchment of the Loess Plateau, China  

Science Conference Proceedings (OSTI)

Global warming will have direct impacts on regional water resources by accelerating the hydrological cycle. Hydrological simulation is an important approach to studying climate change impacts. In this paper, a Snowmelt-based Water Balance Model (...

G. Q. Wang; J. Y. Zhang; Y. Q. Xuan; J. L. Jin; Z. X. Bao; R. M. He; C. S. Liu; Y. L. Liu; X. L. Yan

351

The Global Impact of the Systemic Economies and MENA Business Cycles ?  

E-Print Network (OSTI)

This paper analyzes spillovers from macroeconomic shocks in systemic economies (China, the Euro Area, and the United States) to the Middle East and North Africa (MENA) region as well as outward spillovers from a GDP shock in the Gulf Cooperation Council (GCC) countries and MENA oil exporters to the rest of the world. This analysis is based on a Global Vector Autoregression (GVAR) model, estimated for 38 countries/regions over the period 1979Q2 to 2011Q2. Spillovers are transmitted across economies via trade, financial, and commodity price linkages. The results show that the MENA countries are becoming more sensitive to developments in China than to shocks in the Euro Area or the United States, in line with the direction of evolving trade patterns and the emergence of China as a key driver of the global economy. Outward spillovers from the GCC region and MENA oil exporters are likely to be stronger in their immediate geographical proximity, but also have global implications.

Paul Cashin A; Kamiar Mohaddes B; Mehdi Raissi A

2013-01-01T23:59:59.000Z

352

PURDUE UNIVERSITY LEADERSHIP IN ENERGY RESEARCH Recognizing the grand-challenge problems of global energy demands with evidence of climate change  

E-Print Network (OSTI)

PURDUE UNIVERSITY LEADERSHIP IN ENERGY RESEARCH Recognizing the grand-challenge problems of global energy demands with evidence of climate change and broader environmental impacts, Purdue is building of energy including fossil fuels, nuclear, solar, wind and bioenergy. The activities incorporate socio

353

Recent Progress in the Joint Agreements on "Global and Regional Climate Change" Studies between the United States and the People's Republic of China  

Science Conference Proceedings (OSTI)

This report summarizes the progress since 1991 of two agreements on "global and regional climate change" studies between the U.S. Department of Energy (DOE) and two state agencies of the People's Republic of China. The first agreement is the DOE—...

Michael R. Riches; Wei-Chyung Wang; Panqin Chen; Shiyan Tao; Shuguang Zhou; Yihui Ding

2000-03-01T23:59:59.000Z

354

Quantifying Carbon Cycle Feedbacks  

Science Conference Proceedings (OSTI)

Perturbations to the carbon cycle could constitute large feedbacks on future changes in atmospheric CO2 concentration and climate. This paper demonstrates how carbon cycle feedback can be expressed in formally similar ways to climate feedback, ...

J. M. Gregory; C. D. Jones; P. Cadule; P. Friedlingstein

2009-10-01T23:59:59.000Z

355

Climate Science Measurements Portal  

Science Conference Proceedings (OSTI)

... comparability and for international acceptance of measurement results and insights concerning climatic ... Global Warming and Greenhouse Gases ...

2012-12-27T23:59:59.000Z

356

Habitable Climates: The Influence of Obliquity  

E-Print Network (OSTI)

Extrasolar terrestrial planets with the potential to host life might have large obliquities or be subject to strong obliquity variations. We revisit the habitability of oblique planets with an energy balance climate model (EBM) allowing for dynamical transitions to ice-covered snowball states as a result of ice-albedo feedback. Despite the great simplicity of our EBM, it captures reasonably well the seasonal cycle of global energetic fluxes at Earth's surface. It also performs satisfactorily against a full-physics climate model of a highly oblique Earth-like planet, in an unusual regime of circulation dominated by heat transport from the poles to the equator. Climates on oblique terrestrial planets can violate global radiative balance through much of their seasonal cycle, which limits the usefulness of simple radiative equilibrium arguments. High obliquity planets have severe climates, with large amplitude seasonal variations, but they are not necessarily more prone to global snowball transitions than low obliquity planets. We find that terrestrial planets with massive CO2 atmospheres, typically expected in the outer regions of habitable zones, can also be subject to such dynamical snowball transitions. Some of the snowball climates investigated for CO2-rich atmospheres experience partial atmospheric collapse. Since long-term CO2 atmospheric build-up acts as a climatic thermostat for habitable planets, partial CO2 collapse could limit the habitability of such planets. A terrestrial planet's habitability may thus depend sensitively on its short-term climatic stability.

David S. Spiegel; Kristen Menou; Caleb A. Scharf

2008-07-25T23:59:59.000Z

357

Global Warming and Extreme Weather  

NLE Websites -- All DOE Office Websites (Extended Search)

Global Warming and Extreme Weather Global Warming and Extreme Weather Speaker(s): Michael Wehner Date: November 28, 2006 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Surabi Menon Extreme weather events can have serious impacts on human and ecological systems. Changes in the magnitude and frequency of extreme weather associated with changes in the mean climate are likely the most serious consequence of human induced global warming. Understanding what the future portends is vital if society hopes to adapt to the very different world that awaits. In this talk, we will exploit simple extreme value theory to make predictions about the late 21st century climate. Current work on the relationship between global warming and the hurricane cycle will also be presented. The bottom line is that events that are considered rare today

358

A Comparison of Simulated Cloud Radar Output from the Multiscale Modeling Framework Global Climate Model with CloudSat Cloud Radar Observations  

Science Conference Proceedings (OSTI)

Over the last few years a new type of global climate model (GCM) has emerged in which a cloud-resolving model is embedded into each grid cell of a GCM. This new approach is frequently called a multiscale modeling framework (MMF) or superparameterization. In this article we present a comparison of MMF output with radar observations from the NASA CloudSat mission, which uses a near-nadir-pointing millimeter-wavelength radar to probe the vertical structure of clouds and precipitation. We account for radar detection limits by simulating the 94 GHz radar reflectivity that CloudSat would observe from the high-resolution cloud-resolving model output produced by the MMF. Overall, the MMF does a good job of reproducing the broad pattern of tropical convergence zones, subtropical belts, and midlatitude storm tracks, as well as their changes in position with the annual solar cycle. Nonetheless, the comparison also reveals a number of model shortfalls including (1) excessive hydrometeor coverage at all altitudes over many convectively active regions, (2) a lack of low-level hydrometeors over all subtropical oceanic basins, (3) excessive low-level hydrometeor coverage (principally precipitating hydrometeors) in the midlatitude storm tracks of both hemispheres during the summer season (in each hemisphere), and (4) a thin band of low-level hydrometeors in the Southern Hemisphere of the central (and at times eastern and western) Pacific in the MMF, which is not observed by CloudSat. This band resembles a second much weaker ITCZ but is restricted to low levels.

Marchand, Roger T.; Haynes, J. M.; Mace, Gerald G.; Ackerman, Thomas P.; Stephens, Graeme L.

2009-01-13T23:59:59.000Z

359

Cold-Climate Solar Domestic Water Heating Systems: Life-Cycle Analyses and Opportunities for Cost Reduction  

DOE Green Energy (OSTI)

Conference paper regarding research in potential cost-savings measures for cold-climate solar domestic water hearing systems.

Burch, J.; Salasovich, J.; Hillman, T.

2005-12-01T23:59:59.000Z

360

Mobile Climate Observatory on the Pacific  

NLE Websites -- All DOE Office Websites (Extended Search)

Climate Observatory on the Pacific The AMF2 mobile climate observatory is traveling the Pacific ocean between Los Angeles and Honolulu to improve the way global climate models...

Note: This page contains sample records for the topic "global climate cycle" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

BNL | Carbon Cycle Science  

NLE Websites -- All DOE Office Websites (Extended Search)

The Carbon Cycle Science & Technology Group aims to increase understanding The Carbon Cycle Science & Technology Group aims to increase understanding of the impacts of global change on managed and unmanaged ecosystems and improve knowledge of possible global change mitigation approaches. The group has three main focus areas. FACE Climate Change Experimental Facility Design and Management The CCS&T group is an internationally recognized leader in the development of Free Air CO2 Enrichment (FACE) research facilities. We are interested in the design and management of manipulative experiments that examine the effects of carbon dioxide, ozone, other atmospheric pollutants, temperature and precipitation on natural and managed ecosystems. FACE Plant Physiology and High Throughput Biochemical Phenotyping At FACE facilities we have studied the mechanisms that underlie the

362

Global Distribution and Climate Forcing of Marine Organic Aerosol - Part 2: Effects on Cloud Properties and Radiative Forcing  

Science Conference Proceedings (OSTI)

A series of simulations with the Community Atmosphere Model version 5 (CAM5) with a 7-mode Modal Aerosol Model were conducted to assess the changes in cloud microphysical properties and radiative forcing resulting from marine organic aerosols. Model simulations show that the anthropogenic aerosol indirect forcing (AIF) predicted by CAM5 is decreased in absolute magnitude by up to 0.09 Wm{sup -2} (7 %) when marine organic aerosols are included. Changes in the AIF from marine organic aerosols are associated with small global increases in low-level incloud droplet number concentration and liquid water path of 1.3 cm{sup -3} (1.5 %) and 0.22 gm{sup -2} (0.5 %), respectively. Areas especially sensitive to changes in cloud properties due to marine organic aerosol include the Southern Ocean, North Pacific Ocean, and North Atlantic Ocean, all of which are characterized by high marine organic emission rates. As climate models are particularly sensitive to the background aerosol concentration, this small but non-negligible change in the AIF due to marine organic aerosols provides a notable link for ocean-ecosystem marine low-level cloud interactions and may be a candidate for consideration in future earth system models.

Gantt, Brett; Xu, Jun; Meskhidze, N.; Zhang, Yang; Nenes, Athanasios; Ghan, Steven J.; Liu, Xiaohong; Easter, Richard C.; Zaveri, Rahul A.

2012-07-25T23:59:59.000Z

363

Tropical Cyclones and Global Climate Change: A Post-IPCC Assessment  

E-Print Network (OSTI)

The very limited instrumental record makes extensive analyses of the natural variability of global tropical cyclone activities difficult in most of the tropical cyclone basins. However, in the two regions where reasonably reliable records exist (the North Atlantic and the western North Pacific), substantial multidecadal variability (particularly for intense Atlantic hurricanes) is found, but there is no clear evidence of long-term trends. Efforts have been initiated to use geological and geomorphological records and analysis of oxygen isotope ratios in rainfall recorded in cave stalactites to establish a paleoclimate of tropical cyclones, but these have not yet produced definitive results. Recent thermodynamical estimation of the maximum potential intensities (MPI) of tropical cyclones shows good agreement with observations. Although there are some uncertainties in these MPI approaches, such as their sensitivity to variations in parameters and failure to include some potentially important interactions such as ocean spray feedbacks, the response of upperoceanic thermal structure, and eye and eyewall dynamics, they do appear to be an objective tool with which to predict present and future maxima of tropical cyclone intensity. Recent studies indicate the MPI of cyclones will remain the same or undergo a modest increase of up to 10%--20%. These predicted changes are small compared with the observed natural variations and fall within the uncertainty range in current studies. Furthermore, the known omissions (ocean spray, momentum restriction, and possibly also surface to 300-hPa lapse rate changes) could all operate to mitigate the predicted intensification. A strong caveat must be placed on analysis of results from current GCM simulations of the "tropical-cyc...

Henderson-Sellers Zhang Berz; A. Henderson-sellers; H. Zhang; G. Berz; K. Emanuel; W. Gray; G. Holl; J. Lighthill; S-l. Shieh; P. Webster; K. Mcguffie

1998-01-01T23:59:59.000Z

364

Using Twentieth-Century U.S. Weather Modification Policy to Gain Insight into Global Climate Remediation Governance Issues  

Science Conference Proceedings (OSTI)

With atmospheric greenhouse gas concentrations increasing and binding agreements to reduce anthropogenic emissions wanting, interest in geoengineering as a climate remediation option to be used in tandem with climate change mitigation is growing. ...

Rachel Hauser

2013-04-01T23:59:59.000Z

365

Expanding the Role of "Land Use, Land Use Change and Forestry" Projects and the Carbon Market in Addressing Global Climate Change  

Science Conference Proceedings (OSTI)

While the Land Use, Land Use Change and Forestry (LULUCF) sector is highly significant in any consideration of global climate change, the fact remains that the scale of LULUCF market activity currently is very small, particularly compared with its overall potential for carbon sequestration and importance as both a source and sink of carbon emissions. The underlying problem seems to be finding a workable policy framework. A flexible market-based policy at both international and domestic levels will score ...

2005-12-19T23:59:59.000Z

366

Evaluating the Carbon Cycle of a Coupled Atmosphere-Biosphere Model  

SciTech Connect

We investigate how well a coupled biosphere-atmosphere model, CCM3-IBIS, can simulate the functioning of the terrestrial biosphere and the carbon cycling through it. The simulated climate is compared to observations, while the vegetation cover and the carbon cycle are compared to an offline version of the biosphere model IBIS forced with observed climatic variables. The simulated climate presents some local biases that strongly affect the vegetation (e.g., a misrepresentation of the African monsoon). Compared to the offline model, the coupled model simulates well the globally averaged carbon fluxes and vegetation pools. The zonal mean carbon fluxes and the zonal mean seasonal cycle are also well represented except between 0{sup o} and 20{sup o}N due to the misrepresentation of the African monsoon. These results suggest that, despite regional biases in climate and ecosystem simulations, this coupled atmosphere-biosphere model can be used to explore geographic and temporal variations in the global carbon cycle.

Delire, C; Foley, J A; Thompson, S

2002-08-21T23:59:59.000Z

367

Second National Climate Assessment (2009)  

NLE Websites -- All DOE Office Websites (Extended Search)

Print E-mail alt What is the Second National Climate Assessment? The Second National Climate Assessment, entitled Global Change Impacts in the United States, was published in...

368

Desert dust and anthropogenic aerosol interactions in the Community Climate System Model coupled-carbon-climate model  

Science Conference Proceedings (OSTI)

Coupled-carbon-climate simulations are an essential tool for predicting the impact of human activity onto the climate and biogeochemistry. Here we incorporate prognostic desert dust and anthropogenic aerosols into the CCSM3.1 coupled carbon-climate model and explore the resulting interactions with climate and biogeochemical dynamics through a series of transient anthropogenic simulations (20th and 21st centuries) and sensitivity studies. The inclusion of prognostic aerosols into this model has a small net global cooling effect on climate but does not significantly impact the globally averaged carbon cycle; we argue that this is likely to be because the CCSM3.1 model has a small climate feedback onto the carbon cycle. We propose a mechanism for including desert dust and anthropogenic aerosols into a simple carbon-climate feedback analysis to explain the results of our and previous studies. Inclusion of aerosols has statistically significant impacts on regional climate and biogeochemistry, in particular through the effects on the ocean nitrogen cycle and primary productivity of altered iron inputs from desert dust deposition.

Mahowald, Natalie [Cornell University; Rothenberg, D. [Cornell University; Lindsay, Keith [National Center for Atmospheric Research (NCAR); Doney, Scott C. [Woods Hole Oceanographic Institution; Moore, Jefferson Keith [University of California, Irvine; Randerson, James T. [University of California, Irvine; Thornton, Peter E [ORNL; Jones, C. D. [Hadley Center, Devon, England

2011-02-01T23:59:59.000Z

369

SEESM: Scalable Extensible Earth System Model for Climate Change Science |  

NLE Websites -- All DOE Office Websites (Extended Search)

SEESM: Scalable Extensible Earth System Model for Climate Change Science SEESM: Scalable Extensible Earth System Model for Climate Change Science SEESM: Scalable Extensible Earth System Model for Climate Change Science This SciDAC project will transform an existing, state-of-the-science, third-generation global climate model, the Community Climate System Model (CCSM3), into a first-generation Earth system model that fully simulates the relationships between the physical, chemical, and bio-geochemical processes in the climate system. The model will incorporate new processes necessary to predict future climates based on the specification of greenhouse gas emissions rather than specification of atmospheric concentrations, as is done in present models, which make assumptions about the carbon cycle that are likely not valid. This project will include comprehensive treatments of the processes

370

INCCA: Integrated Climate and Carbon  

SciTech Connect

The INCCA (Integrated Climate and Carbon) initiative will develop and apply the ability to simulate the fate and climate impact of fossil fuel-derived carbon dioxide (CO{sub 2}) and aerosols on a global scale. Coupled climate and carbon cycle modeling like that proposed for INCCA is required to understand and predict the future environmental impacts of fossil fuel burning. At present, atmospheric CO{sub 2} concentrations are prescribed, not simulated, in large climate models. Credible simulations of the entire climate system, however, need to predict time-evolving atmospheric greenhouse forcing using anthropogenic emissions as the fundamental input. Predicting atmospheric COS concentrations represents a substantial scientific advance because there are large natural sources and sinks of carbon that are likely to change as a result of climate change. Both terrestrial (e.g., vegetation on land) and oceanic components of the carbon cycle are known to be sensitive to climate change. Estimates of the amount of man-made CO{sub 2} that will accumulate in the atmosphere depend on understanding the carbon cycle. For this reason, models that use CO{sub 2} emissions, not prescribed atmospheric concentrations, as fundamental inputs are required to directly address greenhouse-related questions of interest to policymakers. INCCA is uniquely positioned to make rapid progress in this high-priority area of global change modeling and prediction because we can leverage previous and ongoing LLNL developments, and use existing component models that are well-developed and published. The need for a vastly improved carbon dioxide prediction capability is appreciated by the DOE. As the US Accelerated Climate Prediction Initiative (ACPI) progresses, we expect the DOE will emphasize the carbon cycle as the next major department-level earth science focus. INCCA will position LLNL for substantial additional funding as this new focus is realized. In the limited time since our LDRD funding was first received (1 November 2000) we have made good progress in acquisition and testing of component models, applications of the terrestrial biosphere model, enhancements to the ocean carbon cycle model and development of the fossil fuel aerosol model.

Thompson, S L

2001-03-13T23:59:59.000Z

371

State of the Climate in 2005  

Science Conference Proceedings (OSTI)

The State of the Climate 2005 report summarizes global and regional climate conditions and places them, where possible, into the context of historical records. Descriptions and analyses of notable climatic anomalies, both global and regional, ...

K. A. Shein

2006-06-01T23:59:59.000Z

372

Consequences of Considering Carbon/Nitrogen Interactions on the Feedbacks between Climate and the Terrestrial Carbon Cycle  

E-Print Network (OSTI)

A number of observational studies indicate that carbon sequestration by terrestrial ecosystems in a world with an atmosphere richer in carbon dioxide and a warmer climate depends on the interactions between the carbon and ...

Sokolov, Andrei P.

373

Global analysis of the transcriptional regulation of Sinorhizobium meliloti cell cycle progression and study of cell cycle regulation during symbiosis with Medicago sativa  

E-Print Network (OSTI)

The complex [alpha]-proteobacterial cell cycle regulatory network is essential not only for faithful replication and segregation of the genome, but also to coordinate unique cellular differentiation events that have evolved ...

De Nisco, Nicole J

2013-01-01T23:59:59.000Z

374

An investigation of the sub-grid variability of trace gases and aerosols for global climate modeling  

Science Conference Proceedings (OSTI)

One fundamental property and limitation of grid based models is their inability to identify spatial details smaller than the grid cell size. While decades of work have gone into developing sub-grid treatments for clouds and land surface processes in climate models, the quantitative understanding of sub-grid processes and variability for aerosols and their precursors is much poorer. In this study, WRF-Chem is used to simulate the trace gases and aerosols over central Mexico during the 2006 MILAGRO field campaign, with multiple spatial resolutions and emission/terrain scenarios. Our analysis focuses on quantifying the sub-grid variability (SGV) of trace gases and aerosols within a typical global climate model grid cell, i.e. 75x75 km2. Our results suggest that a simulation with 3-km horizontal grid spacing adequately reproduces the overall transport and mixing of trace gases and aerosols downwind of Mexico City, while 75-km horizontal grid spacing is insufficient to represent local emission and terrain-induced flows along the mountain ridge, subsequently affecting the transport and mixing of plumes from nearby sources. Therefore, the coarse model grid cell average may not correctly represent aerosol properties measured over polluted areas. Probability density functions (PDFs) for trace gases and aerosols show that secondary trace gases and aerosols, such as O3, sulfate, ammonium, and nitrate, are more likely to have a relatively uniform probability distribution (i.e. smaller SGV) over a narrow range of concentration values. Mostly inert and long-lived trace gases and aerosols, such as CO and BC, are more likely to have broad and skewed distributions (i.e. larger SGV) over polluted regions. Over remote areas, all trace gases and aerosols are more uniformly distributed compared to polluted areas. Both CO and O3 SGV vertical profiles are nearly constant within the PBL during daytime, indicating that trace gases are very efficiently transported and mixed vertically by turbulence. But, simulated horizontal variability indicates that trace gases and aerosols are not well mixed horizontally in the PBL. During nighttime the SGV for trace gases is maximum at the surface, and quickly decreases with height. Unlike the trace gases, the SGV of BC and secondary aerosols reaches a maximum at the PBL top during the day. The SGV decreases with distance away from the polluted urban area, has a more rapid decrease for long-lived trace gases and aerosols than for secondary ones, and is greater during daytime than nighttime. The SGV of trace gases and aerosols is generally larger than for meteorological quantities. Emissions can account for up to 50% of the SGV over urban areas such as Mexico City during daytime for less-reactive trace gases and aerosols, such as CO and BC. The impact of emission spatial variability on SGV decays with altitude in the PBL and is insignificant in the free troposphere. The emission variability affects SGV more significantly during daytime (rather than nighttime) and over urban (rather than rural or remote) areas. The terrain, through its impact on meteorological fields such as wind and the PBL structure, affects dispersion and transport of trace gases and aerosols and their SGV.

Qian, Yun; Gustafson, William I.; Fast, Jerome D.

2010-07-29T23:59:59.000Z

375

Decision-making in Electricity Generation Based on Global Warming Potential and Life-cycle Assessment for Climate Change  

E-Print Network (OSTI)

location of coal and natural gas power plants are not drivensized coal and natural gas fueled power plants, and by two

Horvath, Arpad

2005-01-01T23:59:59.000Z

376

Decision-making in Electricity Generation Based on Global Warming Potential and Life-cycle Assessment for Climate Change  

E-Print Network (OSTI)

499, [OECD 2003] OECD. Decommissioning Nuclear Power Plants:decommissioning of power plants may be significant especially in the case of nuclear

Horvath, Arpad

2005-01-01T23:59:59.000Z

377

Decision-making in Electricity Generation Based on Global Warming Potential and Life-cycle Assessment for Climate Change  

E-Print Network (OSTI)

499, [OECD 2003] OECD. Decommissioning Nuclear Power Plants:maintenance, and ultimate decommissioning of electric poweremissions during the decommissioning of hydroelectric power

Horvath, Arpad

2005-01-01T23:59:59.000Z

378

Decision-making in Electricity Generation Based on Global Warming Potential and Life-cycle Assessment for Climate Change  

E-Print Network (OSTI)

A case study of a hydroelectric power plant (Glen Canyon)over time. In the case of hydroelectric plants, besidesthe decommissioning of hydroelectric power plants. Although

Horvath, Arpad

2005-01-01T23:59:59.000Z

379

The Influence on Climate Change of Differing Scenarios for Future Development Analyzed Using the MIT Integrated Global System Model  

E-Print Network (OSTI)

A wide variety of scenarios for future development have played significant roles in climate policy discussions. This paper presents projections of greenhouse gas (GHG) concentrations, sea level rise due to thermal expansion ...

Prinn, Ronald G.

380

Review article: Modelling effects of geoengineering options in response to climate change and global warming: Implications for coral reefs  

Science Conference Proceedings (OSTI)

Climate change will have serious effects on the planet and on its ecosystems. Currently, mitigation efforts are proving ineffectual in reducing anthropogenic CO"2 emissions. Coral reefs are the most sensitive ecosystems on the planet to climate change, ... Keywords: Aerosols, Afforestation, Albedo, Biochar, Bleaching, CCS, Carbon capture and storage, Caribbean, Coral growth, Downwelling, Ecosystems, El nińo, Great Barrier Reef, IPCC, Interdecadal, SST, Satellite, Scleractinian, Small islands, Symbiosis, Tropics, Weather

M. J. C. Crabbe

2009-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "global climate cycle" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Transient Future Climate over the Western United States Using a Regional Climate Model  

Science Conference Proceedings (OSTI)

Regional climate models (RCMs) have improved our understanding of the effects of global climate change on specific regions. The need for realistic forcing has led to the use of fully coupled global climate models (GCMs) to produce boundary ...

Mark A. Snyder; Lisa C. Sloan

2005-07-01T23:59:59.000Z

382

DOE-Sponsored Beaufort Sea Expedition Studies Methane's Role in Global  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

DOE-Sponsored Beaufort Sea Expedition Studies Methane's Role in DOE-Sponsored Beaufort Sea Expedition Studies Methane's Role in Global Climate Cycle DOE-Sponsored Beaufort Sea Expedition Studies Methane's Role in Global Climate Cycle October 29, 2009 - 1:00pm Addthis Washington, D.C. -- Increased understanding of methane's role in the global climate cycle and the potential of methane hydrate as a future energy resource could result from a recent joint research expedition off the coast of northeastern Alaska involving the Office of Fossil Energy's National Energy Technology Laboratory (NETL). Link to the project web siteThe Beaufort Sea expedition, which included research partners from the U.S. Naval Research Laboratory and Royal Netherlands Institute for Sea Research, gathered a wealth of data to help understand "fluxes," or changes in the concentration of methane within and

383

DOE-Sponsored Beaufort Sea Expedition Studies Methane's Role in Global  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Beaufort Sea Expedition Studies Methane's Role in Beaufort Sea Expedition Studies Methane's Role in Global Climate Cycle DOE-Sponsored Beaufort Sea Expedition Studies Methane's Role in Global Climate Cycle October 29, 2009 - 1:00pm Addthis Washington, D.C. -- Increased understanding of methane's role in the global climate cycle and the potential of methane hydrate as a future energy resource could result from a recent joint research expedition off the coast of northeastern Alaska involving the Office of Fossil Energy's National Energy Technology Laboratory (NETL). Link to the project web siteThe Beaufort Sea expedition, which included research partners from the U.S. Naval Research Laboratory and Royal Netherlands Institute for Sea Research, gathered a wealth of data to help understand "fluxes," or changes in the concentration of methane within and

384

Response of precipitation extremes to idealized global warming in an aqua-planet climate model: Towards robust projection across different horizontal resolutions  

Science Conference Proceedings (OSTI)

Current climate models produce quite heterogeneous projections for the responses of precipitation extremes to future climate change. To help understand the range of projections from multimodel ensembles, a series of idealized 'aquaplanet' Atmospheric General Circulation Model (AGCM) runs have been performed with the Community Atmosphere Model CAM3. These runs have been analysed to identify the effects of horizontal resolution on precipitation extreme projections under two simple global warming scenarios. We adopt the aquaplanet framework for our simulations to remove any sensitivity to the spatial resolution of external inputs and to focus on the roles of model physics and dynamics. Results show that a uniform increase of sea surface temperature (SST) and an increase of low-to-high latitude SST gradient both lead to increase of precipitation and precipitation extremes for most latitudes. The perturbed SSTs generally have stronger impacts on precipitation extremes than on mean precipitation. Horizontal model resolution strongly affects the global warming signals in the extreme precipitation in tropical and subtropical regions but not in high latitude regions. This study illustrates that the effects of horizontal resolution have to be taken into account to develop more robust projections of precipitation extremes.

Li, F.; Collins, W.D.; Wehner, M.F.; Williamson, D.L.; Olson, J.G.

2011-04-15T23:59:59.000Z

385

Multiscale Interactions in the Life Cycle of a Tropical Cyclone Simulated in a Global Cloud-System-Resolving Model. Part I: Large-Scale and Storm-Scale Evolutions  

Science Conference Proceedings (OSTI)

The Nonhydrostatic Icosahedral Atmospheric Model (NICAM), a global cloud-system-resolving model, successfully simulated the life cycle of Tropical Storm Isobel that formed over the Timor Sea in the austral summer of 2006. The multiscale ...

Hironori Fudeyasu; Yuqing Wang; Masaki Satoh; Tomoe Nasuno; Hiroaki Miura; Wataru Yanase

2010-12-01T23:59:59.000Z

386

Downscaling Aerosols and the Impact of Neglected Subgrid Processes on Direct Aerosol Radiative Forcing for a Representative Global Climate Model Grid Spacing  

Science Conference Proceedings (OSTI)

Recent improvements to many global climate models include detailed, prognostic aerosol calculations intended to better reproduce the observed climate. However, the trace gas and aerosol fields are treated at the grid-cell scale with no attempt to account for sub-grid impacts on the aerosol fields. This paper begins to quantify the error introduced by the neglected sub-grid variability for the shortwave aerosol radiative forcing for a representative climate model grid spacing of 75 km. An analysis of the value added in downscaling aerosol fields is also presented to give context to the WRF-Chem simulations used for the sub-grid analysis. We found that 1) the impact of neglected sub-grid variability on the aerosol radiative forcing is strongest in regions of complex topography and complicated flow patterns, and 2) scale-induced differences in emissions contribute strongly to the impact of neglected sub-grid processes on the aerosol radiative forcing. The two of these effects together, when simulated at 75 km vs. 3 km in WRF-Chem, result in an average daytime mean bias of over 30% error in top-of-atmosphere shortwave aerosol radiative forcing for a large percentage of central Mexico during the MILAGRO field campaign.

Gustafson, William I.; Qian, Yun; Fast, Jerome D.

2011-07-13T23:59:59.000Z

387

THE APPLICATION OF A STATISTICAL DOWNSCALING PROCESS TO DERIVE 21{sup ST} CENTURY RIVER FLOW PREDICTIONS USING A GLOBAL CLIMATE SIMULATION  

SciTech Connect

The ability of water managers to maintain adequate supplies in coming decades depends, in part, on future weather conditions, as climate change has the potential to alter river flows from their current values, possibly rendering them unable to meet demand. Reliable climate projections are therefore critical to predicting the future water supply for the United States. These projections cannot be provided solely by global climate models (GCMs), however, as their resolution is too coarse to resolve the small-scale climate changes that can affect hydrology, and hence water supply, at regional to local scales. A process is needed to ‘downscale’ the GCM results to the smaller scales and feed this into a surface hydrology model to help determine the ability of rivers to provide adequate flow to meet future needs. We apply a statistical downscaling to GCM projections of precipitation and temperature through the use of a scaling method. This technique involves the correction of the cumulative distribution functions (CDFs) of the GCM-derived temperature and precipitation results for the 20{sup th} century, and the application of the same correction to 21{sup st} century GCM projections. This is done for three meteorological stations located within the Coosa River basin in northern Georgia, and is used to calculate future river flow statistics for the upper Coosa River. Results are compared to the historical Coosa River flow upstream from Georgia Power Company’s Hammond coal-fired power plant and to flows calculated with the original, unscaled GCM results to determine the impact of potential changes in meteorology on future flows.

Werth, D.; Chen, K. F.

2013-08-22T23:59:59.000Z

388

Influence of the Realistic Description of Soil Water-Holding Capacity on the Global Water Cycle in a GCM  

Science Conference Proceedings (OSTI)

The sensitivity of the hydrological cycle to soil water-holding capacity (WHC) is investigated using the Laboratoire de Meteorologie Dynamique General Circulation Model (LMD GCM) coupled to a land surface model (LSM). A reference simulation (REF),...

Agnčs Ducharne; Katia Laval

2000-12-01T23:59:59.000Z

389

Diagnosing Northern Hemisphere Jet Portrayal in 17 CMIP3 Global Climate Models: Twenty-First-Century Projections  

Science Conference Proceedings (OSTI)

The anthropogenic climate change impacts on the eddy–jet system include an intensified midlatitude jet stream and an elevated tropopause, as well as a poleward-shifted jet. While both responses are evident in phase 3 of the Coupled Model ...

Sharon C. Delcambre; David J. Lorenz; Daniel J. Vimont; Jonathan E. Martin

2013-07-01T23:59:59.000Z

390

A simple evaluation of global and diffuse Luminous Efficacy for all sky conditions in tropical and humid climate  

E-Print Network (OSTI)

and humid climate A. H. Fakra, H. Boyer, F. Miranville, D. Bigot Building Physics and Systems Laboratory illuminance 1. Introduction Daylighting is recognized as an important and useful strategy in the design. Literature review The luminous efficacy of daylight (in lm/W) is defined as the ratio of daylight illuminance

391

Greenland and Antarctic Mass Balances for Present and Doubled Atmospheric CO2 from the GENESIS Version-2 Global Climate Model  

Science Conference Proceedings (OSTI)

As anthropogenic greenhouse warming occurs in the next century, changes in the mass balances of Greenland and Antarctica will probably accelerate and may have significant effects on global sea level. Recent trends and possible future changes in ...

Starley L. Thompson; David Pollard

1997-05-01T23:59:59.000Z

392

Response of Tropical Cyclones to Idealized Climate Change Experiments in a Global High-Resolution Coupled General Circulation Model  

Science Conference Proceedings (OSTI)

The authors present an assessment of how tropical cyclone activity might change owing to the influence of increased atmospheric carbon dioxide concentrations, using the U.K. High-Resolution Global Environment Model (HiGEM) with N144 resolution (~...

Ray Bell; Jane Strachan; Pier Luigi Vidale; Kevin Hodges; Malcolm Roberts

2013-10-01T23:59:59.000Z

393

Improving Global Model Precipitation Forecasts over India Using Downscaling and the FSU Superensemble. Part II: Seasonal Climate  

Science Conference Proceedings (OSTI)

This study addresses seasonal forecasts of rains over India using the following components: high-resolution rain gauge–based rainfall data covering the years 1987–2001, rain-rate initialization, four global atmosphere–ocean coupled models, a ...

Arindam Chakraborty; T. N. Krishnamurti

2009-09-01T23:59:59.000Z

394

Global Economic Effects of Changes in Crops, Pasture, and Forests due to Changing Climate, Carbon Dioxide, and Ozone  

E-Print Network (OSTI)

Multiple environmental changes will have consequences for global vegetation. To the extent that crop yields and pasture and forest productivity are affected there can be important economic consequences. We examine the ...

Reilly, John M.

395

Life Cycle Energy and Climate Change Implication of Nanotechnologies: A Critical Review Hyung Chul Kim and Vasilis Fthenakis  

E-Print Network (OSTI)

and Bakshi (2011) in terms of life-cycle impacts, fossil energy usage, and exergy. Their estimates of fossil degree to the high energy usage. Other environmental-impact profiles were consistent with these energy to Healey s study wherein electricity usage for the CVD process dominates energy demand (99%). In the same

396

President Obama Announces His Climate Action Plan  

NLE Websites -- All DOE Office Websites (Extended Search)

steady, responsible action to cut carbon pollution, prepare the Nation for the impacts of climate change, and lead international efforts to address climate change as a global...

397

Bringing simulation to implementation: Presentation of a global approach in the design of passive solar buildings under humid tropical climates  

E-Print Network (OSTI)

In early 1995, a DSM pilot initiative has been launched in the French islands of Guadeloupe and Reunion through a partnership between several public and private partners (the French Public Utility EDF, the University of Reunion Island, low cost housing companies, architects, energy consultants, etc...) to set up standards to improve thermal design of new residential buildings in tropical climates. This partnership led to defining optimized bio-climatic urban planning and architectural designs featuring the use of passive cooling architectural principles (solar shading, natural ventilation) and components, as well as energy efficient systems and technologies. The design and sizing of each architectural component on internal thermal comfort in building has been assessed with a validated thermal and airflow building simulation software (CODYRUN). These technical specifications have been edited in a reference document which has been used to build over 300 new pilot dwellings through the years 1996-1998 in Reunion...

Garde, François; Celaire, Robert

2012-01-01T23:59:59.000Z

398

Penetration of hydrogen-based energy system and its potential for causing global environmental change: Scoping risk analysis based on life cycle thinking  

SciTech Connect

A hydrogen-based economy seems superficially to be environmentally friendly, and many people have worked toward its realization. Today hydrogen is mainly produced by decarbonizing fossil fuels (e.g. natural gas), and in the future decarbonization of both fossil fuels and biomass will play a leading role in the production of hydrogen. The main purpose of this paper is to suggest the identification of potential environmental risks in terms of 'life cycle thinking' (which considers all aspects from production to utilization) with regard to the hydrogen-based economy to come. Hydrogen production by decarbonization results in CO{sub 2} emissions. The final destination of the recovered CO{sub 2} is uncertain. Furthermore, there is a possibility that hydrogen molecules will escape to the atmosphere, posing risks that could occasion global environmental changes such as depletion of stratospheric ozone, temperature change in the stratosphere and change of the hydrides cycle through global vaporization. Based on the results of simulation, requirements regarding the following items are proposed to minimize potential risks: hydrogen source, production and storage loss.

Kikuchi, Ryunosuke [Department of Basic Science and Environment (CERNAS), ESAC, Polytechnic Institute of Coimbra, Bencanta, 3040-316 Coimbra (Portugal)]. E-mail: kikuchi@mail.esac.pt

2006-03-15T23:59:59.000Z

399

A Study of the Abundance and 13C/12C Ratio of Atmospheric Carbon Dioxide to Advance the Scientific Understanding of Terrestrial Processes Regulating the Global Carbon Cycle  

Science Conference Proceedings (OSTI)

The primary goal of our research program, consistent with the goals of the U.S. Climate Change Science Program and funded by the terrestrial carbon processes (TCP) program of DOE, has been to improve understanding of changes in the distribution and cycling of carbon among the active land, ocean and atmosphere reservoirs, with particular emphasis on terrestrial ecosystems. Our approach is to systematically measure atmospheric CO2 to produce time series data essential to reveal temporal and spatial patterns. Additional measurements of the 13C/12C isotopic ratio of CO2 provide a basis for distinguishing organic and inorganic processes. To pursue the significance of these patterns further, our research also involved interpretations of the observations by models, measurements of inorganic carbon in sea water, and of CO2 in air near growing land plants.

Stephen C. Piper

2005-10-15T23:59:59.000Z

400

Comparison of the Vertical Velocity Used to Calculate the Cloud Droplet Number Concentration in a Cloud Resolving and a Global Climate Model  

NLE Websites -- All DOE Office Websites (Extended Search)

Comparison of the Vertical Velocity Comparison of the Vertical Velocity used to Calculate the Cloud Droplet Number Concentration in a Cloud-Resolving and a Global Climate Model H. Guo, J. E. Penner, M. Herzog, and X. Liu Department of Atmospheric, Oceanic and Space Sciences University of Michigan Ann Arbor, Michigan Introduction Anthropogenic aerosols are effective cloud condensation nuclei (CCN). The availability of CCN affects the initial cloud droplet number concentration (CDNC) and droplet size; therefore, cloud optical properties (the so-called first aerosol indirect effect). However, the estimate of CDNC from a mechanistic treatment shows significant differences from the empirical schemes mainly due to the large bias of the large-scale vertical velocity (w) (Ghan et al. 1993, 1995; Boucher and Lohmann 1995;

Note: This page contains sample records for the topic "global climate cycle" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

High resolution simulation of the South Asian monsoon using a variable4 resolution global climate model5  

E-Print Network (OSTI)

1 1 2 3 High resolution simulation of the South Asian monsoon using a variable4 resolution global of the South Asian monsoon rainfall distribution and the interactions27 between monsoon circulation of resolution on the overall quality of the simulated regional33 monsoon fields. It is found that the monsoon

Dufresne, Jean-Louis

402

Response of tropical cyclones to idealized climate change experiments in a global high resolution coupled general circulation model  

Science Conference Proceedings (OSTI)

We present an assessment of how tropical cyclone activity might change due to the influence of increased atmospheric carbon dioxide concentrations, using the UK’s High Resolution Global Environment Model (HiGEM) with N144 resolution (~90 km in the ...

Ray Bell; Jane Strachan; Pier Luigi Vidale; Kevin Hodges; Malcolm Roberts

403

An open letter to the 2008 presidential candidates: get the facts right on what's responsible for global climate change  

Science Conference Proceedings (OSTI)

The two remaining presidential candidates have adopted policies for reducing anthropogenic greenhouse gas emissions that address factors that are mistakenly held responsible as the primary cause of global warming. Here's what they need to keep in mind in order to craft genuinely efficacious policies. (author)

Linden, Henry R.

2008-07-15T23:59:59.000Z

404

Photon Enhanced Thermionic Emission for Solar Energy Harvesting Progress Report to the Global Climate and Energy Project  

E-Print Network (OSTI)

Photon Enhanced Thermionic Emission for Solar Energy Harvesting Progress Report to the Global Photon Enhanced Thermionic Emission (PETE) is a newly proposed form of solar energy harvesting which have inherently lower efficiency limits but take advantage of energy throughout the entire solar

Nur, Amos

405

MODELING AND ANALYSIS OF GLOBAL AND REGIONAL HYDROLOGIC PROCESSES AND APPROPRIATE CONSERVATION OF MOIST ENTROPY  

SciTech Connect

The research supported by DOE funding addressed the fundamental issues of understanding and modeling of hydrologic processes in relation to regional and global climate change. The emphasis of this research effort was on the application of isentropic modeling and analysis to advance the accuracy of the simulation of all aspects of the hydrologic cycle including clouds and thus the climate state regionally and globally. Simulation of atmospheric hydrologic processes by the UW hybrid isentropic coordinate models provided fundamental insight into global monsoonal circulations, and regional energy exchange in relation to the atmospheric hydrologic cycle. Inter-comparison of UW hybrid model simulations with those from the NCAR Community Climate Model and other climate and numerical weather prediction (NWP) models investigated the increased accuracies gained in modeling long-range transport in isentropic coordinates and isolated differences in modeling of the climate state. The inter-comparisons demonstrated advantages in the simulation of the transport of the hydrologic components of the climate system and provided insight into the more general problems of simulating hydrologic processes, aerosols and chemistry for climate. This research demonstrated the viability of the UW isentropic-eta model for long-term integration for climate and climate change studies and documented that no insurmountable barriers exist to simulation of climate utilizing hybrid isentropic coordinate models. The results provide impetus for continued development of hybrid isentropic coordinate models as a means to advance accuracies in the simulation of global and regional climate in relation to transport and the planetary distribution of heat sources and sinks.

Donald Johnson, Todd Schaack

2007-06-08T23:59:59.000Z

406

Terrestrial ecosystems and climatic change  

SciTech Connect

The structure and function of terrestrial ecosystems depend on climate, and in turn, ecosystems influence atmospheric composition and climate. A comprehensive, global model of terrestrial ecosystem dynamics is needed. A hierarchical approach appears advisable given currently available concepts, data, and formalisms. The organization of models can be based on the temporal scales involved. A rapidly responding model describes the processes associated with photosynthesis, including carbon, moisture, and heat exchange with the atmosphere. An intermediate model handles subannual variations that are closely associated with allocation and seasonal changes in productivity and decomposition. A slow response model describes plant growth and succession with associated element cycling over decades and centuries. These three levels of terrestrial models are linked through common specifications of environmental conditions and constrain each other. 58 refs.

Emanuel, W.R. (Oak Ridge National Lab., TN (USA)); Schimel, D.S. (Colorado State Univ., Fort Collins, CO (USA). Natural Resources Ecology Lab.)

1990-01-01T23:59:59.000Z

407

An Ocean Observing System for Climate  

Science Conference Proceedings (OSTI)

Designs and implementation are proceeding for a Global Ocean Observing System (GOOS) and a Global Climate Observing System (GCOS). The initial design for the ocean component of the GCOS, which is also the climate module of the GOOS, was completed ...

Worth D. Nowlin Jr.; Neville Smith; George Needler; Peter K. Taylor; Robert Weller; Ray Schmitt; Liliane Merlivat; Alain Vézina; Arthur Alexiou; Michael McPhaden; Massaaki Wakatsuchi

1996-10-01T23:59:59.000Z

408

Why We Should Monitor the Climate  

Science Conference Proceedings (OSTI)

A successful global climate monitoring system must fulfill clear societal objectives. For some aspects of climate monitoring, the societal goals are understood and are clearly stated, but long-term, decadal/centennial climate predictions have, in ...

Richard Goody; James Anderson; Thomas Karl; Roberta Balstad Miller; Gerald North; Joanne Simpson; Graeme Stephens; Warren Washington

2002-06-01T23:59:59.000Z

409

Second National Climate Assessment: Companion Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

Working Groups Budget Strategic Plan Related Federal Climate Efforts What We Do Study Climate & Global Change Prepare The Nation For Change Assess the U.S. Climate Make Our...

410

Second National Climate Assessment: Production Team  

NLE Websites -- All DOE Office Websites (Extended Search)

Working Groups Budget Strategic Plan Related Federal Climate Efforts What We Do Study Climate & Global Change Prepare The Nation For Change Assess the U.S. Climate Make Our...

411

Forecast cloudy; The limits of global warming models  

SciTech Connect

This paper reports on climate models used to study global warming. It discusses factors which must be included in climate models, shortcomings of existing climate models, and scenarios for global warming.

Stone, P.H.

1992-02-01T23:59:59.000Z

412

MCA4Climate - Guidance for scientifically sound climate change planning |  

Open Energy Info (EERE)

MCA4Climate - Guidance for scientifically sound climate change planning MCA4Climate - Guidance for scientifically sound climate change planning Jump to: navigation, search LEDSGP green logo.png FIND MORE DIA TOOLS This tool is part of the Development Impacts Assessment (DIA) Toolkit from the LEDS Global Partnership. Tool Summary LAUNCH TOOL Name: Multicriteria Analysis for Climate (MCA4climate) Agency/Company /Organization: United Nations Environment Programme (UNEP), World Bank Climate Smart Planning Platform Sector: Climate, Energy, Land Topics: Co-benefits assessment, Low emission development planning, Policies/deployment programs Resource Type: Guide/manual Complexity/Ease of Use: Moderate Website: www.mca4climate.info/ Program Start: 2011 Cost: Free Multicriteria Analysis for Climate (MCA4climate) Screenshot References: MCA4Climate - Guidance for scientifically sound climate change planning[1]

413

Rigorous evaluation of a soil heat transfer model for mesoscale climate change impact studies  

Science Conference Proceedings (OSTI)

The influence of Climate Change on plant development as well as on carbon and nitrogen cycling in soils is an important research topic for Global Change impact assessment at the regional scale. These changes affect the availability and quality of ground ... Keywords: Energy balance, GLOWA-Danube, Land surface, Mesoscale, Soil temperature

Markus Muerth; Wolfram Mauser

2012-07-01T23:59:59.000Z

414

Nonlinearity of Carbon Cycle Feedbacks  

Science Conference Proceedings (OSTI)

Coupled climate–carbon models have shown the potential for large feedbacks between climate change, atmospheric CO2 concentrations, and global carbon sinks. Standard metrics of this feedback assume that the response of land and ocean carbon uptake ...

Kirsten Zickfeld; Michael Eby; H. Damon Matthews; Andreas Schmittner; Andrew J. Weaver

2011-08-01T23:59:59.000Z

415

Exploring Perturbed Physics Ensembles in a Regional Climate Model  

Science Conference Proceedings (OSTI)

Perturbed physics ensembles (PPEs) have been widely used to assess climate model uncertainties and have provided new estimates of climate sensitivity and parametric uncertainty in state-of-the-art climate models. So far, mainly global climate ...

Omar Bellprat; Sven Kotlarski; Daniel Lüthi; Christoph Schär

2012-07-01T23:59:59.000Z

416

The Community Climate System Model  

Science Conference Proceedings (OSTI)

The community Earth System Model (CESM) is a fully coupled, global climate model that provides state-of-the-art computer simulations of the Earth's past, present, and future climate states.

Worley, Patrick H [ORNL

2011-01-01T23:59:59.000Z

417

Contrails, Cirrus Trends, and Climate  

Science Conference Proceedings (OSTI)

Rising global air traffic and its associated contrails have the potential for affecting climate via radiative forcing. Current estimates of contrail climate effects are based on coverage by linear contrails that do not account for spreading and, ...

Patrick Minnis; J. Kirk Ayers; Rabindra Palikonda; Dung Phan

2004-04-01T23:59:59.000Z

418

Effect of Terrestrial and Marine Organic Aerosol on Regional and Global Climate: Model Development, Application, and Verification with Satellite Data  

SciTech Connect

In this DOE project the improvements to parameterization of marine primary organic matter (POM) emissions, hygroscopic properties of marine POM, marine isoprene derived secondary organic aerosol (SOA) emissions, surfactant effects, new cloud droplet activation parameterization have been implemented into Community Atmosphere Model (CAM 5.0), with a seven mode aerosol module from the Pacific Northwest National Laboratory (PNNL)���¢��������s Modal Aerosol Model (MAM7). The effects of marine aerosols derived from sea spray and ocean emitted biogenic volatile organic compounds (BVOCs) on microphysical properties of clouds were explored by conducting 10 year CAM5.0-MAM7 model simulations at a grid resolution 1.9�������°��������2.5�������° with 30 vertical layers. Model-predicted relationship between ocean physical and biological systems and the abundance of CCN in remote marine atmosphere was compared to data from the A-Train satellites (MODIS, CALIPSO, AMSR-E). Model simulations show that on average, primary and secondary organic aerosol emissions from the ocean can yield up to 20% increase in Cloud Condensation Nuclei (CCN) at 0.2% Supersaturation, and up to 5% increases in droplet number concentration of global maritime shallow clouds. Marine organics were treated as internally or externally mixed with sea salt. Changes associated with cloud properties reduced (absolute value) the model-predicted short wave cloud forcing from -1.35 Wm-2 to -0.25 Wm-2. By using different emission scenarios, and droplet activation parameterizations, this study suggests that addition of marine primary aerosols and biologically generated reactive gases makes an important difference in radiative forcing assessments. All baseline and sensitivity simulations for 2001 and 2050 using global-through-urban WRF/Chem (GU-WRF) were completed. The main objective of these simulations was to evaluate the capability of GU-WRF for an accurate representation of the global atmosphere by exploring the most accurate configuration of physics options in GWRF for global scale modeling in 2001 at a horizontal grid resolution of 1�������° x 1�������°. GU-WRF model output was evaluated using observational datasets from a variety of sources including surface based observations (NCDC and BSRN), model reanalysis (NCEP/ NCAR Reanalysis and CMAP), and remotely-sensed data (TRMM) to evaluate the ability of GU-WRF to simulate atmospheric variables at the surface as well as aloft. Explicit treatment of nanoparticles produced from new particle formation in GU-WRF/Chem-MADRID was achieved by expanding particle size sections from 8 to 12 to cover particles with the size range of 1.16 nm to 11.6 �������µm. Simulations with two different nucleation parameterizations were conducted for August 2002 over a global domain at a 4�������º by 5�������º horizontal resolution. The results are evaluated against field measurement data from the 2002 Aerosol Nucleation and Real Time Characterization Experiment (ANARChE) in Atlanta, Georgia, as well as satellite and reanalysis data. We have also explored the relationship between ���¢��������clean marine���¢������� aerosol optical properties and ocean surface wind speed using remotely sensed data from the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) on board the CALIPSO satellite and the Advanced Microwave Scanning Radiometer (AMSR-E) on board the AQUA satellite. Detailed data analyses

Meskhidze, Nicholas; Zhang, Yang; Kamykowski, Daniel

2012-03-28T23:59:59.000Z

419

Effect of Terrestrial and Marine Organic Aerosol on Regional and Global Climate: Model Development, Application, and Verification with Satellite Data  

Science Conference Proceedings (OSTI)

In this DOE project the improvements to parameterization of marine primary organic matter (POM) emissions, hygroscopic properties of marine POM, marine isoprene derived secondary organic aerosol (SOA) emissions, surfactant effects, new cloud droplet activation parameterization have been implemented into Community Atmosphere Model (CAM 5.0), with a seven mode aerosol module from the Pacific Northwest National Laboratory (PNNL)���¢��������s Modal Aerosol Model (MAM7). The effects of marine aerosols derived from sea spray and ocean emitted biogenic volatile organic compounds (BVOCs) on microphysical properties of clouds were explored by conducting 10 year CAM5.0-MAM7 model simulations at a grid resolution 1.9�������°��������2.5�������° with 30 vertical layers. Model-predicted relationship between ocean physical and biological systems and the abundance of CCN in remote marine atmosphere was compared to data from the A-Train satellites (MODIS, CALIPSO, AMSR-E). Model simulations show that on average, primary and secondary organic aerosol emissions from the ocean can yield up to 20% increase in Cloud Condensation Nuclei (CCN) at 0.2% Supersaturation, and up to 5% increases in droplet number concentration of global maritime shallow clouds. Marine organics were treated as internally or externally mixed with sea salt. Changes associated with cloud properties reduced (absolute value) the model-predicted short wave cloud forcing from -1.35 Wm-2 to -0.25 Wm-2. By using different emission scenarios, and droplet activation parameterizations, this study suggests that addition of marine primary aerosols and biologically generated reactive gases makes an important difference in radiative forcing assessments. All baseline and sensitivity simulations for 2001 and 2050 using global-through-urban WRF/Chem (GU-WRF) were completed. The main objective of these simulations was to evaluate the capability of GU-WRF for an accurate representation of the global atmosphere by exploring the most accurate configuration of physics options in GWRF for global scale modeling in 2001 at a horizontal grid resolution of 1�������° x 1�������°. GU-WRF model output was evaluated using observational datasets from a variety of sources including surface based observations (NCDC and BSRN), model reanalysis (NCEP/ NCAR Reanalysis and CMAP), and remotely-sensed data (TRMM) to evaluate the ability of GU-WRF to simulate atmospheric variables at the surface as well as aloft. Explicit treatment of nanoparticles produced from new particle formation in GU-WRF/Chem-MADRID was achieved by expanding particle size sections from 8 to 12 to cover particles with the size range of 1.16 nm to 11.6 �������µm. Simulations with two different nucleation parameterizations were conducted for August 2002 over a global domain at a 4�������º by 5�������º horizontal resolution. The results are evaluated against field measurement data from the 2002 Aerosol Nucleation and Real Time Characterization Experiment (ANARChE) in Atlanta, Georgia, as well as satellite and reanalysis data. We have also explored the relationship between ���¢��������clean marine���¢������� aerosol optical properties and ocean surface wind speed using remotely sensed data from the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) on board the CALIPSO satellite and the Advanced Microwave Scanning Radiometer (AMSR-E) on board the AQUA satellite. Detailed data analyses

Meskhidze, Nicholas; Zhang, Yang; Kamykowski, Daniel

2012-03-28T23:59:59.000Z

420

IGBP-DIS Global Primary Production Data Initiative  

NLE Websites -- All DOE Office Websites (Extended Search)

IGBP-DIS Global Primary Production Data Initiative IGBP-DIS Global Primary Production Data Initiative The GPPDI Workshop was held in Cincinnati, U.S.A., December 1996 (Olson et al., 1997). Summary (September 1996) by Dick Olson and Steve Prince from Global Change Newsletter No. 27; International Geosphere-Biosphere Programme: A Study of Global Change (IGBP) of the International Council of Scientific Unions Global modelling and monitoring of net primary production (NPP) is being given high priority in IGBP owing to increasing concern over issues such as the consequences of perturbations in the carbon cycle, the impacts of global land-use change, global climate change, and global food security. Significant advances have been made in process modelling and in the use of remote sensing to monitor global vegetation. The advances in modelling and remote sensing of NPP have highlighted the lack of readily available, reliable information from field studies with which to parameterise and validate the models. The Global Primary Production Data Initiative (GPPDI) is intended to remedy this problem by identifying existing field data sets of primary production and associated environmental data. The programme is using data sets for representative sites, and extrapolating or regionalising the better data sets to grid cells sizes of up to 0.5Âş x 0.5Âş. Emphasis is on variables needed to parameterise and validate primary production models, including above and below ground NPP, standing crop, LAI, climate data, site data and landscape variability.

Note: This page contains sample records for the topic "global climate cycle" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Cycles in fossil diversity  

E-Print Network (OSTI)

Transitions in Global Marine Diversity, Science 281, 1157-know if this cycle is a variation in true diversity or onlyin observed diversity, but either case requires explanation

Rohde, Robert A.; Muller, Richard A.

2004-01-01T23:59:59.000Z

422

Response of the Toxic Dinoflagellate Karenia brevis to Current and Projected Environmental Conditions: Salinity and Global Climate Change  

E-Print Network (OSTI)

Harmful algal blooms (HABs) are increasing in frequency and duration worldwide. Karenia brevis, the major toxic dinoflagellate in the Gulf of Mexico, produces potent neurotoxins, known as brevetoxins. For K. brevis, only minor concentrations of brevetoxins are needed to induce toxicity and environmental conditions appear to have the most direct impact on the cellular content of these toxins. A better understanding of K. brevis biology is essential to understand the mechanisms underlying toxin production and the ecology of such HABs, as well as to better anticipate and respond to such blooms. Here we present findings on the effect of salinity and availability of carbon on cellular physiology and brevetoxin and brevenal production by K. brevis. When grown at salinities of 35 and 27, but otherwise identical conditions, total brevetoxin cellular concentration varied between 0 to 18.5 pg cell-1 and brevenal varied between 0 and 1 pg cell-1. In response to hypoosmotic stress brevetoxin production was triggered, as a result, brevetoxin production increased up to 53%, while growth rates remained unchanged. A significant hypoosmotic event of >11%, was needed to trigger the response in brevetoxin production. To determine if K. brevis was sensing changes in specific ions within seawater (K+, Cl- or Ca2+), we systematically removed one ion while keeping the remaining ions at equivalent molar concentration for salinity of 35. Dilution in seawater K+ concentrations triggered the production of brevetoxins, increasing production ?44%. Ecosystem changes due to climate change have increased the production of toxins in other HAB species; here we examined the impact on K. brevis. We have shown that modification of pCO2 level and temperature did not influence brevetoxin production; however, predicted climate change scenarios (increased temperature and pCO2) did significantly increase the growth rate of K. brevis, by 60% at 25°C and 55% at 30°C. We suggest that K. brevis blooms could benefit from predicted increase in pCO2 over the next 100 years. Overall, our findings close a critical gap in knowledge regarding the function of brevetoxin in K. brevis by identifying a connection between brevetoxin production and osmoacclimation.

Errera, Reagan Michelle

2013-05-01T23:59:59.000Z

423

Climate Change Projections for the Twenty-First Century and Climate Change Commitment in the CCSM3  

Science Conference Proceedings (OSTI)

Climate change scenario simulations with the Community Climate System Model version 3 (CCSM3), a global coupled climate model, show that if concentrations of all greenhouse gases (GHGs) could have been stabilized at the year 2000, the climate ...

Gerald A. Meehl; Warren M. Washington; Benjamin D. Santer; William D. Collins; Julie M. Arblaster; Aixue Hu; David M. Lawrence; Haiyan Teng; Lawrence E. Buja; Warren G. Strand

2006-06-01T23:59:59.000Z

424

Climate Forcings and Climate Sensitivities Diagnosed from Coupled Climate Model Integrations  

Science Conference Proceedings (OSTI)

A simple technique is proposed for calculating global mean climate forcing from transient integrations of coupled atmosphere–ocean general circulation models (AOGCMs). This “climate forcing” differs from the conventionally defined radiative ...

Piers Mde F. Forster; Karl E. Taylor

2006-12-01T23:59:59.000Z

425

ECONOMIC MODELING OF THE GLOBAL ADOPTION OF CARBON CAPTURE AND SEQUESTRATION TECHNOLOGIES  

E-Print Network (OSTI)

and sequestration as natural gas prices rise. INTRODUCTION Heightened concerns about global climate change have were added to EPPA for 1) coal power generation with CCS (coal capture), 2) natural gas combined cycle pulverized coal technology and the 3 #12;advanced natural gas technology. Compared with the pulverized coal

426

Development of global hourly 0.5-degree land surface air temperature datasets  

Science Conference Proceedings (OSTI)

Land surface air temperature (SAT) is one of the most important variables in weather and climate studies, and its diurnal cycle and day-to-day variation are also needed for a variety of applications. Global long-term hourly SAT observational data, ...

Aihui Wang; Xubin Zeng

427

Development of Global Hourly 0.5° Land Surface Air Temperature Datasets  

Science Conference Proceedings (OSTI)

Land surface air temperature (SAT) is one of the most important variables in weather and climate studies, and its diurnal cycle is also needed for a variety of applications. Global long-term hourly SAT observational data, however, do not exist. ...

Aihui Wang; Xubin Zeng

2013-10-01T23:59:59.000Z

428

Policy options for stabilizing global climate. Draft report to Congress. Volume 2: Chapters VII-IX. Draft report  

SciTech Connect

The report discusses different energy sources, fuels, and substitutes in different scenarios to either reduce or control the pollution which causes the greenhouse effect therefore changes the climate of the world. It describes the substitute technologies and other means by which greenhouse gas emissions could be reduced relative to the scenarios described. A range of policies that might be used to promote such reductions are described, which address domestic and international issues. The report discusses the diverse sources and economic activities responsible for greenhouse gas emissions. The primary means of accomplishing the goal of reducing greenhouse gas emissions is the development and use of technologies that reduce energy requirements (i.e., improve energy efficiency), use less carbon-intensive fuels, or that replace or reduce emissions of other greenhouse gases. In addition to this technological approach, there are also several areas in which management strategies are the means of reducing greenhouse gas emissions, particularly with respect to the buildup of gases resulting from some agricultural practices and forest resources.

1989-02-01T23:59:59.000Z

429

Computer demonstration of an interactive modeling system for the study of global change and biogeochemistry  

SciTech Connect

There is a need for visually oriented materials to aid in the study of global ecological science. Analysis of the carbon cycle is key to understanding Potential climate change. We have used satellite imagery along with global climate and soil texture data sets to simulate seasonal patterns in net carbon fixation and soil CO[sub 2] production. An interactive computer system is used to illustrate graphical results from various model scenarios of climate warming and land use change. These include global animations of monthly gridded CO[sub 2] exchange between the atmosphere and the terrestrial biosphere. This modeling demonstration highlights the importance of annual CO[sub 2] fluxes in tropical forests (40% of global totals) and the large carbon storage potential in boreal and arctic soils.

Klooster, S.A.; Potter, S. (NASA-Ames Research Center, Moffett Field, CA (United States)); Randerson, J. (Carnegie Institution of Washington, Stanford, CA (United States))

1993-06-01T23:59:59.000Z

430

Climate Action Plan (New Mexico)  

Energy.gov (U.S. Department of Energy (DOE))

Recognizing the profound implications that global warming and climate variation could have on the economy, environment and quality of life in the Southwest, New Mexico Governor Bill Richardson...

431

Climates of the Twentieth and Twenty-First Centuries Simulated by the NCAR Climate System Model  

Science Conference Proceedings (OSTI)

The Climate System Model, a coupled global climate model without “flux adjustments” recently developed at the National Center for Atmospheric Research, was used to simulate the twentieth-century climate using historical greenhouse gas and sulfate ...

Aiguo Dai; T. M. L. Wigley; B. A. Boville; J. T. Kiehl; L. E. Buja

2001-02-01T23:59:59.000Z

432

Comments on climate change scenario development  

Science Conference Proceedings (OSTI)

A short review is presented of progress in climate change scenario development. Sources of uncertainty are discussed. Critical assessment of climate models for their veracity in describing the present climate is considered essential. Methods of deriving ... Keywords: Climate change, Global climate models, Greenhouse effect, Scenarios

A. B. Pittock

1995-05-01T23:59:59.000Z

433

Priorities in global climate change research. Hearings before the Subcommittee on Science of the Committee on Science, Space, and Technology, US House of Representatives, One Hundred Second Congress, First Session, October 8, 10, 1991  

SciTech Connect

A hearing on the greenhouse effect brought testimony from various government and environmental officials. The panelists reviewed the major sources of uncertainty in the scientific evidence for global warming and in the models used to forecast climate change. They highlighted the most critical research areas and issues that ought to be addressed in order to improve the scientific basis for assessing the effects of global warming. In addition, the dependability was reviewed of economic models available to assess different options for mitigation and for adaptation to greenhouse warming projections.

1991-01-01T23:59:59.000Z

434

Evaluation of AMIP II Global Climate Model Simulations of the Land Surface Water Budget and Its Components over the GEWEX-CEOP Regions  

Science Conference Proceedings (OSTI)

The land surface water balance components simulated by 20 atmospheric global circulation models (AGCMs) participating in phase II of the Atmospheric Model Intercomparison Project (AMIP II) are analyzed globally and over seven Global Energy and ...

P. Irannejad; A. Henderson-Sellers

2007-06-01T23:59:59.000Z

435

Climate Action Plan (Florida)  

Energy.gov (U.S. Department of Energy (DOE))

On July 12 and 13, 2007, Governor Charlie Crist hosted “Serve to Preserve: A Florida Summit on Global Climate Change.” The summit brought together leaders of business, government, science and...

436

Climate Assessment for 1999  

Science Conference Proceedings (OSTI)

The global climate during 1999 was impacted by Pacific cold episode (La Nińa) conditions throughout the year, which resulted in regional precipitation and atmospheric circulation patterns across the Pacific Ocean and the Americas that are ...

Gerald D. Bell; Michael S. Halpert; Russell C. Schnell; R. Wayne Higgins; Jay Lawrimore; Vernon E. Kousky; Richard Tinker; Wasila Thiaw; Muthuvel Chelliah; Anthony Artusa

2000-06-01T23:59:59.000Z

437

Climate Action Plan (Minnesota)  

Energy.gov (U.S. Department of Energy (DOE))

Recognizing the implications that global climate change may have on the economy, environment and quality of life in Minnesota, Governor Tim Pawlenty signed into law the 2007 Next Generation Energy...

438

CLIMATE PROTECTION UPDATE  

E-Print Network (OSTI)

Climate disruption is an urgent threat to the environmental and economic health of our communities. With less than 5 % of the world’s population, the United States produces more than 25 % of the global greenhouse gas emissions, and those emissions are continuing to grow. On February 16, 2005 the Kyoto Protocol, the international agreement to address climate disruption, became law for the 163

unknown authors

2006-01-01T23:59:59.000Z

439

NETL: Methane Hydrates - Global Assessment of Methane Gas Hydrates  

NLE Websites -- All DOE Office Websites (Extended Search)

Global Assessment of Methane Gas Hydrates Last Reviewed 12/18/2013 Global Assessment of Methane Gas Hydrates Last Reviewed 12/18/2013 DE-FE0003060 Goal The goal of this project is to develop a global assessment of methane gas hydrates that will facilitate informed decision-making regarding the potential development of gas hydrate resources between the scientific community and other stakeholders/decision makers. The Assessment will provide science-based information on the role of gas hydrates in natural climate change and the carbon cycle, their sensitivity to climate change, and the potential environmental and socio-economic impacts of hydrate production. Performers Stiftelsen GRID-Arendal, Arendal, Norway Funding Institutions United Nations Environment Programme (UNEP) Statoil Schlumberger United States Department of Energy (USDOE)

440

Structural insight into SoxC and SoxD interaction and their role in electron transport process in the novel global sulfur cycle in Paracoccus pantotrophus  

SciTech Connect

Microbial oxidation of reduced inorganic sulfur compounds mainly sulfur anions in the environment is one of the major reactions of the global sulfur cycle mediated by phylogenetically diverse prokaryotes. The sulfur oxidizing gene cluster (sox) of {alpha}-Proteobacteria comprises of at least 16 genes, which form two transcriptional units, viz., soxSRT and soxVWXYZABCDEFGH. Sequence analysis reveals that soxD gene product (SoxD) belongs to the di-heme cytochrome c family of electron transport proteins whereas soxC gene product (SoxC) is a sulfur dehydrogenase. We employed homology modeling to construct the three-dimensional structures of the SoxC and SoxD from Paracoccus pantotrophus. SoxD protein is known to interact with SoxC. With the help of docking studies we have identified the residues involved in the interaction of SoxC and SoxD. The putative active site geometries of these two proteins as well as the structural basis of the involvements of these proteins in electron transport process during the oxidation of sulfur anions are also investigated.

Bagchi, Angshuman [Bioinformatics Center, Bose Institute, AJC Bose Centenary Building, P1/12 CIT Scheme VIIM, Kolkata 700 054 (India)]. E-mail: angshu@bic.boseinst.ernet.in; Roy, Pradosh [Department of Microbiology, Bose Institute, AJC Bose Centenary Building, P1/12 CIT Scheme VIIM, Kolkata 700 054 (India)]. E-mail: prodosh@bic.boseinst.ernet.in

2005-06-17T23:59:59.000Z

Note: This page contains sample records for the topic "global climate cycle" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Event:Second Global Conference on Agriculture, Food Security...  

Open Energy Info (EERE)

Conference on Agriculture, Food Security and Climate Change Jump to: navigation, search Calendar.png Second Global Conference on Agriculture, Food Security and Climate Change: on...

442

Global Warming, Soot, Ice  

NLE Websites -- All DOE Office Websites (Extended Search)

Global Warming, Soot, Ice Speaker(s): James Hansen Date: November 7, 2003 - 12:00pm Location: 90-3122 Irreversible "dangerous anthropogenic interference" with the climate system...

443

Carbon Cycle  

NLE Websites -- All DOE Office Websites (Extended Search)

Carbon Cycle Carbon Cycle Latest Global Carbon Budget Estimates Including CDIAC Estimates Terrestrial Carbon Management Data Sets and Analyses Carbon Dioxide Emissions from Fossil-Fuel Consumption and Cement Manufacture, (2011) Annual Fossil-Fuel CO2 Emissions: Mass of Emissions Gridded by One Degree Latitude by One Degree Longitude (2012) Monthly Fossil-Fuel CO2 Emissions: Mass of Emissions Gridded by One Degree Latitude by One Degree Longitude (2012) Annual Fossil-Fuel CO2 Emissions: Global Stable Carbon Isotopic Signature (2012) Monthly Fossil-Fuel CO2 Emissions: Isomass (δ 13C) of Emissions Gridded by One Degree Latitude by One Degree Longitude (2012) AmeriFlux - Terrestrial Carbon Dioxide, Water Vapor, and Energy Balance Measurements Estimates of Monthly CO2 Emissions and Associated 13C/12C Values

444

Global Climate Change Seminar subtitle  

NLE Websites -- All DOE Office Websites (Extended Search)

Year 81% Fossil Energy 29,259 mmt CO 2 42,589 mmt CO 2 * Primarily traditional biomass, wood, and waste. Source: IEA. Energy Technology Perspectives 2010. 3 And yet, at present,...

445

Global Trends and Variability in Soil Moisture and Drought Characteristics, 1950–2000, from Observation-Driven Simulations of the Terrestrial Hydrologic Cycle  

Science Conference Proceedings (OSTI)

Global and regional trends in drought for 1950–2000 are analyzed using a soil moisture–based drought index over global terrestrial areas, excluding Greenland and Antarctica. The soil moisture fields are derived from a simulation of the ...

Justin Sheffield; Eric F. Wood

2008-02-01T23:59:59.000Z

446

Global Climate Variations Connected with Sea Surface Temperature Anomalies in the Eastern Equatorial Pacific Ocean for the 1958–73 Period  

Science Conference Proceedings (OSTI)

The sea surface temperature anomalies in the eastern equatorial Pacific Ocean are shown to demarcate a “key region” new 130°W for observed variations in the global general circulation. Various techniques are used to describe global conditions ...

Yi Hong Pan; Abraham H. Oort

1983-06-01T23:59:59.000Z

447

Analysis of Regional Climate Model Results for Simulations of Future Climates  

Science Conference Proceedings (OSTI)

Contemporary global climate models produce results that are too coarse to provide the level of detail required to evaluate environmental, social, and economic impacts of global climate change. High-resolution limited-area models (regional climate models) nested within the global model output have been used to create physically and spatially consistent climates with high spatial resolution. This report evaluates the effectiveness of these models.

2002-04-08T23:59:59.000Z

448

Are Refiners Entering a Golden Age or a Short Cycle?  

U.S. Energy Information Administration (EIA)

Are Refiners Entering a Golden Age or a Short Cycle? Global Refining Strategies 2007 Barcelona, Spain

449

ORISE: Climate and Atmospheric Research  

NLE Websites -- All DOE Office Websites (Extended Search)

Climate and Atmospheric Research Climate and Atmospheric Research Capabilities Overview U.S. Climate Reference Network U.S. Historical Climate Network Contact Us Oak Ridge Institute for Science Education Climate and Atmospheric Research The Oak Ridge Institute for Science and Education (ORISE) partners with the National Oceanic and Atmospheric Administration's Atmospheric Turbulence and Diffusion Division (ATDD) to conduct climate research focused on issues of national and global importance. Research is performed with personnel support from ORISE's Independent Environmental Assessment and Verification (IEAV) programs, as well as in collaboration with scientists and engineers from Oak Ridge National Laboratory (ORNL), and numerous other organizations, government agencies, universities and private research institutions.

450

Hurricanes and Global Warming: Results from Downscaling IPCC AR4 Simulations  

Science Conference Proceedings (OSTI)

Changes in tropical cyclone activity are among the more potentially consequential results of global climate change, and it is therefore of considerable interest to understand how anthropogenic climate change may affect such storms. Global climate ...

Kerry Emanuel; Ragoth Sundararajan; John Williams

2008-03-01T23:59:59.000Z

451

Using and Designing GCM–RCM Ensemble Regional Climate Projections  

Science Conference Proceedings (OSTI)

Multimodel ensembles, whereby different global climate models (GCMs) and regional climate models (RCMs) are combined, have been widely used to explore uncertainties in regional climate projections. In this study, the extent to which information ...

Elizabeth J. Kendon; Richard G. Jones; Erik Kjellström; James M. Murphy

2010-12-01T23:59:59.000Z

452

Simulations of Present and Future Climates in the Western United States with Four Nested Regional Climate Models  

Science Conference Proceedings (OSTI)

In this paper, the authors analyze simulations of present and future climates in the western United States performed with four regional climate models (RCMs) nested within two global ocean–atmosphere climate models. The primary goal here is to ...

P. B. Duffy; R. W. Arritt; J. Coquard; W. Gutowski; J. Han; J. Iorio; J. Kim; L.-R. Leung; J. Roads; E. Zeledon

2006-03-01T23:59:59.000Z

453

Pacific Northwest Climate Sensitivity Simulated by a Regional Climate Model Driven by a GCM. Part II: 2×CO2 Simulations  

Science Conference Proceedings (OSTI)

Global climate change due to increasing concentrations of greenhouse gases has stimulated numerous studies and discussions about its possible impacts on water resources. Climate scenarios generated by climate models at spatial resolutions ranging ...

L. R. Leung; S. J. Ghan

1999-07-01T23:59:59.000Z

454

Examining Internal and External Contributors to Greenland Climate Variability Using CCSM3  

Science Conference Proceedings (OSTI)

Greenland climate variability is connected to internal and external sources of global climate variability in six millennium simulations using Community Climate System Model 3. Simulation forcings are consistent with the PaleoClimate Model Inter-...

Heather J. Andres; W. R. Peltier

455

Stochastic rainfall downscaling of climate models  

Science Conference Proceedings (OSTI)

Precipitation extremes and small-scale variability are essential drivers in many climate change impact studies. However, the spatial resolution currently achieved by Global (GCM) and Regional (RCM) Climate Models is still insufficient to correctly ...

D. D’Onofrio; E. Palazzi; J. von Hardenberg; A. Provenzale; S. Calmanti

456

Climate impact metrics for energy technology evaluation  

E-Print Network (OSTI)

The climate change mitigation potential of energy technologies depends on how their lifecycle greenhouse gas emissions compare to global climate stabilization goals. Current methods for comparing technologies, which assess ...

Edwards, Morgan Rae

2013-01-01T23:59:59.000Z

457

National Climate Assessment: Overview  

NLE Websites -- All DOE Office Websites (Extended Search)

Production Team Production Team Indicators System Coastal Resilience Resources Make Our Science Accessible Link Climate Change & Health Provide Data and Tools Coordinate Internationally National Climate Assessment: Overview Print E-mail What is the National Climate Assessment (NCA)? The NCA is an important resource for understanding and communicating climate change science and impacts in the United States. It informs the nation about already observed changes, the current status of the climate, and anticipated trends for the future. The NCA report process integrates scientific information from multiple sources and sectors to highlight key findings and significant gaps in our knowledge. The NCA also establishes consistent methods for evaluating climate impacts in the U.S. in the context of broader global change. Finally, findings from the NCA provide input to Federal science priorities and are used by U.S. citizens, communities, and businesses as they create more sustainable and environmentally sound plans for the nation's future.

458

The Global Precipitation Climatology Project: First Algorithm Intercomparison Project  

Science Conference Proceedings (OSTI)

The Global Precipitation Climatology Project (GPCP) was established by the World Climate Research Programme to produce global analyses of area- and time-averaged precipitation for use in climate research. To achieve the required spatial coverage, ...

Phillip A. Arkin; Pingping Xie

1994-03-01T23:59:59.000Z

459

Global Vegetation and Climate Change due to Future Increases in CO2 as Projected by a Fully Coupled Model with Dynamic Vegetation  

Science Conference Proceedings (OSTI)

Transient simulations are presented of future climate and vegetation associated with continued rising levels of CO2. The model is a fully coupled atmosphere–ocean–land–ice model with dynamic vegetation. The impacts of the radiative and ...

Michael Notaro; Steve Vavrus; Zhengyu Liu

2007-01-01T23:59:59.000Z

460

On the Climate History of Chaco Canyon  

E-Print Network (OSTI)

of knowledge about solar physics (sun cycles have not beenand solar variability: What’s new under the sun? Earth andthe sun in climate change. Studies relating climate to solar

Berger, Wolfgang H.

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "global climate cycle" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Regional and Global Data  

NLE Websites -- All DOE Office Websites (Extended Search)

Products > Regional/Global Products > Regional/Global Regional and Global Data Biogeochemical Dynamics Data Regional and global biogeochemical dynamics data can be used to improve our understanding of the structure and function of various ecosystems; to enable prediction across spatial and temporal scales; and to parameterize and validate terrestrial ecosystem models. The ORNL DAAC compiles, archives, and distributes more than 150 products from the following projects: Climate Collections Hydroclimatology Collections ISLSCP II Project Net Primary Productivity (NPP) River Discharge (RIVDIS) Russian Land Cover (RLC) Soil Collections Vegetation Collections Vegetation-Ecosystem Modeling (VEMAP) Climate Collections Climate collections include measured and modeled values for variables such as temperature, precipitation, humidity, radiation, wind velocity, and

462

TITAN'S TRANSPORT-DRIVEN METHANE CYCLE  

SciTech Connect

The mechanisms behind the occurrence of large cloud outbursts and precipitation on Titan have been disputed. A global- and annual-mean estimate of surface fluxes indicated only 1% of the insolation, or {approx}0.04 W m{sup -2}, is exchanged as sensible and/or latent fluxes. Since these fluxes are responsible for driving atmospheric convection, it has been argued that moist convection should be quite rare and precipitation even rarer, even if evaporation globally dominates the surface-atmosphere energy exchange. In contrast, climate simulations indicate substantial cloud formation and/or precipitation. We argue that the top-of-atmosphere (TOA) radiative imbalance is diagnostic of horizontal heat transport by Titan's atmosphere, and thus constrains the strength of the methane cycle. Simple calculations show the TOA radiative imbalance is {approx}0.5-1 W m{sup -2} in Titan's equatorial region, which implies 2-3 MW of latitudinal heat transport by the atmosphere. Our simulation of Titan's climate suggests this transport may occur primarily as latent heat, with net evaporation at the equator and net accumulation at higher latitudes. Thus, the methane cycle could be 10-20 times previous estimates. Opposing seasonal transport at solstices, compensation by sensible heat transport, and focusing of precipitation by large-scale dynamics could further enhance the local, instantaneous strength of Titan's methane cycle by a factor of several. A limited supply of surface liquids in regions of large surface radiative imbalance may throttle the methane cycle, and if so, we predict more frequent large storms over the lakes district during Titan's northern summer.

Mitchell, Jonathan L. [Department of Earth and Space Sciences, Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA 90095 (United States)

2012-09-10T23:59:59.000Z

463

Humidification Processes in Gas Turbine Cycles.  

E-Print Network (OSTI)

??The global climate change caused by emissions of greenhouse gases from combustion processes has been recognized as a continuously growing problem and much research focuses… (more)

Thern, Marcus

2005-01-01T23:59:59.000Z

464

Seeking to Better Understand the Carbon Cycle  

Office of Science (SC) Website

the biology involved in global climate change as possible to gives us more predictive and management capabilities." Part of the mission of the Department of Energy's Office of...

465

Global Cloud Climatologies: A Historical Review  

Science Conference Proceedings (OSTI)

Accurate global cloud information is required for many climate studies, particularly for validation of climate model simulations. This paper reviews the cloud climatologies currently available, identifying and attempting to explain the ...

N. A. Hughes

1984-05-01T23:59:59.000Z

466

Global Snow Cover Monitoring: An Update  

Science Conference Proceedings (OSTI)

Accurate monitoring of the large-scale dimensions of global snow cover is essential for understanding details of climate dynamics and climate change. Presently, such information is gathered individually from ground station networks and satellite ...

David A. Robinson; Kenneth F. Dewey; Richard R. Heim Jr.

1993-09-01T23:59:59.000Z

467

Climate VISION: Private Sector Initiatives: Forest Products:...  

Office of Scientific and Technical Information (OSTI)

Program Office The Global Change Program Office (GCPO) serves as USDA's focal point for climate change issues and is responsible for coordinating activities with other Federal...

468

OpenEI Community - climate change  

Open Energy Info (EERE)

http:en.openei.orgcommunitytaxonomyterm1730 en U.S. Global Change Research Program publishes "National Climate Assessment" report for United States http:en.openei.org...

469

Climate Vision: Presidential Statements  

Office of Scientific and Technical Information (OSTI)

President-Elect Obama's Address to the Global Climate Summit President-Elect Obama's Address to the Global Climate Summit November 18, 2008 THE PRESIDENT: Let me begin by thanking the bipartisan group of U.S. governors who convened this meeting. Few challenges facing America - and the world - are more urgent than combating climate change. The science is beyond dispute and the facts are clear. Sea levels are rising. Coastlines are shrinking. We've seen record drought, spreading famine, and storms that are growing stronger with each passing hurricane season. Climate change and our dependence on foreign oil, if left unaddressed, will continue to weaken our economy and threaten our national security. I know many of you are working to confront this challenge. In particular, I want to commend Governor Sebelius, Governor Doyle, Governor Crist, Governor

470

G-Climate  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

67 67 AUDIT REPORT THE U.S. DEPARTMENT OF ENERGY'S GLOBAL CLIMATE CHANGE ACTIVITIES U.S. DEPARTMENT OF ENERGY OFFICE OF INSPECTOR GENERAL OFFICE OF AUDIT SERVICES APRIL 2000 April 6, 2000 MEMORANDUM FOR THE SECRETARY FROM: Gregory H. Friedman (Signed) Inspector General SUBJECT: INFORMATION: Audit Report on "The U.S. Department of Energy's Global Climate Change Activities" BACKGROUND The President's Climate Change Proposal of October 1997 and the United Nation's Framework Convention on Climate Change (FCCC), were intended to identify methods of reducing greenhouse gas emissions. The FCCC was ratified by the U.S. Senate in 1992 and put into force in July 1994. The purpose of the Kyoto

471

Global net primary production and heterotrophic respiration for 1987  

Science Conference Proceedings (OSTI)

An ecosystem process model, BIOME-BGC, was parameterized and used to simulate the actual net primary production and heterotrophic respiration using daily climatic data, land cover type, leaf area index gridded to 1{degree} latitude by 1{degree} longitude grid cells for the year 1987. Global net primary production was 52 Pg C. These estimates were validated directly by two different methods. First, the grid cells were aggregated and used as inputs to a 3D atmospheric transport model, to compare CO{sub 2} station data with predictions. We simulated the intra-annual variation of atmospheric CO{sub 2} well for the northern hemisphere, but not for the southern hemisphere. Second, we calculated the net {sup 13}C uptake of vegetation, which is a function of water use efficiency. The {sup 13}C/{sup 12}C ratios agreed with measured data, indicating a strong limitation of global primary processes by the hydrologic cycle, especially precipitation. These are different from other global carbon models as we can simulate the year-to-year variation of climate, including El Nino, on the global carbon cycle.

Hunt, R.E. Jr.; Piper, S.C.; Nemani, R. [Univ. of Montana, Missoula, MT (United States)]|[Scripps Institute of Oceanography, La Jolla, CA (United States)] [and others

1995-06-01T23:59:59.000Z

472

CoalFleet RD&D Augmentation Plan for Integrated Gasification Combined Cycle (IGCC) Power Plants  

Science Conference Proceedings (OSTI)

Advanced, clean coal technologies such as integrated gasification combined cycle (IGCC) offer societies around the world the promise of efficient, affordable power generation at markedly reduced levels of emissions8212including "greenhouse gases" linked to global climate change8212relative to today's current fleet of coal-fired power plants. To help accelerate the development, demonstration, and market introduction of IGCC and other clean coal technologies, EPRI formed the CoalFleet for Tomorrow initiati...

2007-01-24T23:59:59.000Z

473

Analysis of Energy, Environmental and Life Cycle Cost Reduction Potential of Ground Source Heat Pump (GSHP) in Hot and Humid Climate  

DOE Green Energy (OSTI)

It has been widely recognized that the energy saving benefits of GSHP systems are best realized in the northern and central regions where heating needs are dominant or both heating and cooling loads are comparable. For hot and humid climate such as in the states of FL, LA, TX, southern AL, MS, GA, NC and SC, buildings have much larger cooling needs than heating needs. The Hybrid GSHP (HGSHP) systems therefore have been developed and installed in some locations of those states, which use additional heat sinks (such as cooling tower, domestic water heating systems) to reject excess heat. Despite the development of HGSHP the comprehensive analysis of their benefits and barriers for wide application has been limited and often yields non-conclusive results. In general, GSHP/HGSHP systems often have higher initial costs than conventional systems making short-term economics unattractive. Addressing these technical and financial barriers call for additional evaluation of innovative utility programs, incentives and delivery approaches. From scientific and technical point of view, the potential for wide applications of GSHP especially HGSHP in hot and humid climate is significant, especially towards building zero energy homes where the combined energy efficient GSHP and abundant solar energy production in hot climate can be an optimal solution. To address these challenges, this report presents gathering and analyzing data on the costs and benefits of GSHP/HGSHP systems utilized in southern states using a representative sample of building applications. The report outlines the detailed analysis to conclude that the application of GSHP in Florida (and hot and humid climate in general) shows a good potential.

Yong X. Tao; Yimin Zhu

2012-04-26T23:59:59.000Z

474

Climate Change and the Middle Atmosphere. Part I: The Doubled CO2 Climate  

Science Conference Proceedings (OSTI)

The impact of doubled atmospheric CO2 on the climate of the middle atmosphere is investigated using the GISS global climate/middle atmosphere model. In the standard experiment, the CO2 concentration is doubled both in the stratosphere and ...

D. Rind; R. Suozzo; N. K. Balachandran; M. J. Prather

1990-02-01T23:59:59.000Z

475

The Climate Response to Stratospheric Sulfate Injections and Implications for Addressing Climate Emergencies  

Science Conference Proceedings (OSTI)

Stratospheric sulfate aerosol injection has been proposed to counteract anthropogenic greenhouse gas warming and prevent regional climate emergencies. Global warming is projected to be largest in the polar regions, where consequences to climate ...

Kelly E. McCusker; David S. Battisti; Cecilia M. Bitz

2012-05-01T23:59:59.000Z

476

EVALUATING SHORT-TERM CLIMATE VARIABILITY IN THE LATE HOLOCENE OF THE NORTHERN GREAT PLAINS  

Science Conference Proceedings (OSTI)

This literature study investigated methods and areas to deduce climate change and climate patterns, looking for short-term cycle phenomena and the means to interpret them. Many groups are actively engaged in intensive climate-related research. Ongoing research might be (overly) simplified into three categories: (1) historic data on weather that can be used for trend analysis and modeling; (2) detailed geological, biological (subfossil), and analytical (geochemical, radiocarbon, etc.) studies covering the last 10,000 years (about since last glaciation); and (3) geological, paleontological, and analytical (geochemical, radiometric, etc.) studies over millions of years. Of importance is our ultimate ability to join these various lines of inquiry into an effective means of interpretation. At this point, the process of integration is fraught with methodological troubles and misconceptions about what each group can contribute. This project has met its goals to the extent that it provided an opportunity to study resource materials and consider options for future effort toward the goal of understanding the natural climate variation that has shaped our current civilization. A further outcome of this project is a proposed methodology based on ''climate sections'' that provides spatial and temporal correlation within a region. The method would integrate cultural and climate data to establish the climate history of a region with increasing accuracy with progressive study and scientific advancement (e. g., better integration of regional and global models). The goal of this project is to better understand natural climatic variations in the recent past (last 5000 years). The information generated by this work is intended to provide better context within which to examine global climate change. The ongoing project will help to establish a basis upon which to interpret late Holocene short-term climate variability as evidenced in various studies in the northern Great Plains, northern hemisphere, and elsewhere. Finally these data can be integrated into a history of climate change and predictive climate models. This is not a small undertaking. The goals of researchers and the methods used vary considerably. The primary task of this project was literature research to (1) evaluate existing methodologies used in geologic climate change studies and evidence for short-term cycles produced by these methodologies and (2) evaluate late Holocene climate patterns and their interpretations.

Joseph H. Hartman

1999-09-01T23:59:59.000Z

477

Climate Change | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Climate Change Climate Change Climate Change View our interactive climate vulnerability map to learn more about how climate change could impact energy supplies and delivery near your home. | Map by Daniel Wood, Energy Department. View our interactive climate vulnerability map to learn more about how climate change could impact energy supplies and delivery near your home. | Map by Daniel Wood, Energy Department. Addressing the effects of climate change is a top priority of the Energy Department. As global temperature rise, wildfires, drought and high electricity demand put stress on the nation's energy infrastructure. And severe weather -- the leading cause of power outages and fuel supply disruption in the United States -- is projected to worsen,

478

Water-Use Efficiency of the Terrestrial Biosphere: A Model Analysis Focusing on Interactions between the Global Carbon and Water Cycles  

Science Conference Proceedings (OSTI)

Carbon and water cycles are intimately coupled in terrestrial ecosystems, and water-use efficiency (WUE; carbon gain at the expense of unit water loss) is one of the key parameters of ecohydrology and ecosystem management. In this study, the ...

Akihiko Ito; Motoko Inatomi

2012-04-01T23:59:59.000Z

479

climate change | OpenEI Community  

Open Energy Info (EERE)

climate change climate change Home Graham7781's picture Submitted by Graham7781(1992) Super contributor 18 January, 2013 - 15:46 U.S. Global Change Research Program publishes "National Climate Assessment" report for United States climate change drought OpenEI sea level rise temperatures U.S. Global Climate Change program The U.S. Global Change Research Program, established under the Department of Commerce in 2010, and partnered with NOAA, released an extensive National Climate Assessment report, projecting future climate changes in the United States under different scenarios. The 1,200 page report highlights some rather grim findings about the future of climate change. Here are 5 of the more disconcerting graphics from the report: 1. U.S. Average Temperatures Syndicate content

480

Climate VISION: News  

Office of Scientific and Technical Information (OSTI)

News Climate Vison RSS Recent News Feed News Climate Vison RSS Recent News Feed July 20, 2010 Secretary Chu Announces Initiatives to Promote Clean Energy at First Clean Energy Ministerial Read the Press Release and Download Fact Sheet (PDF 76 KB) July 20, 2010 Government and corporate leaders announced a new public-private partnership, Global Superior Energy Performancecm at the Clean Energy Ministerial in Washington D.C. Read More and Download Fact Sheet (PDF 124 KB) June 20, 2010 Seventh Meeting of the Leaders' Representatives of the Major Economies Forum on Energy and Climate Read the Co-Chair's Summary June 1, 2010 Department of State releases Fifth U.S. Climate Action Report Read the Press Release December 18, 2009 Remarks by the President at the Morning Plenary Session of the United Nations Climate Change Conference

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481

A Global Approach to Assess the Potential Impact of Climate Change on Stream Water Temperatures and Related In-Stream First-Order Decay Rates  

Science Conference Proceedings (OSTI)

Stream water temperature is an important factor used in water quality modeling. To estimate monthly stream temperature on a global scale, a simple nonlinear regression model was developed. It was applied to stream temperatures recorded over a 36-...

Manuel Punzet; Frank Voß; Anja Voß; Ellen Kynast; Ilona Bärlund

2012-06-01T23:59:59.000Z

482

Estimated Global Hydrographic Variability  

Science Conference Proceedings (OSTI)

An estimate is made of the three-dimensional global oceanic temperature and salinity variability, omitting the seasonal cycle, both as a major descriptive element of the ocean circulation and for use in the error estimates of state estimation. ...

Gaël Forget; Carl Wunsch

2007-08-01T23:59:59.000Z

483

Research Needs and Directions of Regional Climate Modeling Using WRF and CCSM  

SciTech Connect

Climate varies across a wide range of temporal and spatial scales. Yet, climate modeling has long been approached using global models that can resolve only the broader scales of atmospheric processes and their interactions with land, ocean, and sea ice. Clearly, large-scale climate determines the environment for mesoscale and microscale processes that govern the weather and local climate, but, likewise, processes that occur at the regional scale may have significant impacts on the large scale circulation. Resolving such scale interactions will lead to much improved understanding of how climate both influences, and is influenced by, human activities. Since October 2003, the National Center for Atmospheric Research (NCAR) has supported an effort through the Opportunity Fund to develop regional climate modeling capability using the Weather Research and Forecasting (WRF) model (http://www.wrf-model.org/index.php) and the Community Climate System Model (CCSM) (http://www.ccsm.ucar.edu/models), with participations by members of both the Mesoscale and Microscale Meteorology and Climate and Global Dynamics Divisions. The goal is to develop a next generation community Regional Climate Model (RCM) that can address both downscaling and upscaling issues in climate modeling. Downscaling is the process of deriving regional climate information based on large-scale climate conditions. Both dynamical and statistical downscaling methods have been used to produce regional climate change scenarios; however, their resolution and physical fidelity are considered inadequate. Hence, the global change community has expressed a strong demand for improved regional climate information to explore the implications of adaptation and mitigation and assess climate change impacts (http://www.climatescience.gov/events/workshop2002/). Upscaling encapsulates the aggregate effects of small-scale physical and dynamical processes on the large-scale climate. One form of upscaling is the use of physical parameterizations such as that for deep convection. These are also considered to be inadequate, as much of the uncertainty in model sensitivity to greenhouse gases is now known to be associated with cloud parameterizations. Another form of upscaling is to explicitly include the effects of regional processes on the large-scale environment, both locally and remotely. Since their inception in the late 1980s, RCMs have been used predominantly to address downscaling issues through one-way coupling with global analyses or climate models. As part of the NCAR project, WRF has been adapted for simulating regional climate. Seasonal simulations over the U.S. have shown realistic features including the low-level jet and diurnal cycle of rainfall in the Central U.S. (Leung et al. 2005), and orographic precipitation in the western U.S. (Done et al. 2005). A WRF Regional Climate Modeling Working Group has been established to coordinate RCM research activities. To help define the next steps, a workshop on “Research Needs and Directions of Regional Climate Modeling Using WRF and CCSM” was organized to engage the regional and global climate modeling communities to: (1) define research needs