National Library of Energy BETA

Sample records for biogeochemical research terrestrial

  1. Terrestrial biogeochemical feedbacks in the climate system: from past to future

    SciTech Connect (OSTI)

    Arneth, A.; Harrison, S. P.; Zaehle, S.; Tsigaridis, K; Menon, S; Bartlein, P.J.; Feichter, J; Korhola, A; Kulmala, M; O'Donnell, D; Schurgers, G; Sorvari, S; Vesala, T

    2010-01-05

    The terrestrial biosphere plays a major role in the regulation of atmospheric composition, and hence climate, through multiple interlinked biogeochemical cycles (BGC). Ice-core and other palaeoenvironmental records show a fast response of vegetation cover and exchanges with the atmosphere to past climate change, although the phasing of these responses reflects spatial patterning and complex interactions between individual biospheric feedbacks. Modern observations show a similar responsiveness of terrestrial biogeochemical cycles to anthropogenically-forced climate changes and air pollution, with equally complex feedbacks. For future conditions, although carbon cycle-climate interactions have been a major focus, other BGC feedbacks could be as important in modulating climate changes. The additional radiative forcing from terrestrial BGC feedbacks other than those conventionally attributed to the carbon cycle is in the range of 0.6 to 1.6 Wm{sup -2}; all taken together we estimate a possible maximum of around 3 Wm{sup -2} towards the end of the 21st century. There are large uncertainties associated with these estimates but, given that the majority of BGC feedbacks result in a positive forcing because of the fundamental link between metabolic stimulation and increasing temperature, improved quantification of these feedbacks and their incorporation in earth system models is necessary in order to develop coherent plans to manage ecosystems for climate mitigation.

  2. Subsurface Biogeochemical Research FY11 Second Quarter Performance Measure

    SciTech Connect (OSTI)

    Scheibe, Timothy D.

    2011-03-31

    The Subsurface Biogeochemical Research (SBR) Long Term Measure for 2011 under the Performance Assessment Rating Tool (PART) measure is to "Refine subsurface transport models by developing computational methods to link important processes impacting contaminant transport at smaller scales to the field scale." The second quarter performance measure is to "Provide a report on computational methods linking genome-enabled understanding of microbial metabolism with reactive transport models to describe processes impacting contaminant transport in the subsurface." Microorganisms such as bacteria are by definition small (typically on the order of a micron in size), and their behavior is controlled by their local biogeochemical environment (typically within a single pore or a biofilm on a grain surface, on the order of tens of microns in size). However, their metabolic activity exerts strong influence on the transport and fate of groundwater contaminants of significant concern at DOE sites, in contaminant plumes with spatial extents of meters to kilometers. This report describes progress and key findings from research aimed at integrating models of microbial metabolism based on genomic information (small scale) with models of contaminant fate and transport in aquifers (field scale).

  3. Subsurface Biogeochemical Research | U.S. DOE Office of Science (SC)

    Office of Science (SC) Website

    Subsurface Biogeochemical Research Biological and Environmental Research (BER) BER Home About Research 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

  4. U.S. Department of Energy (DOE)--Surface Biogeochemical Research (SBR) 6th Annual PI Meeting: Abstracts

    SciTech Connect (OSTI)

    Hazen Ed., T.C.

    2011-04-11

    On behalf of the Subsurface Biogeochemical Research (SBR) program managers in the Climate and Environmental Sciences Division (CESD), Office of Biological and Environmental Research (BER), welcome to the 2011 SBR Principal Investigators meeting. Thank you in advance for your attendance and your presentations at this year's meeting. As the events in Japan continue to unfold, we are all reminded that the research we perform on radionuclide behavior in the environment has implications beyond legacy waste cleanup and in fact has its place in the discussion on the expanded use of nuclear power. As in the past, there are three broad objectives to the Principal Investigators meeting: (1) to provide opportunities to share research results and promote interactions among the SBR scientists and other invited guests; (2) to evaluate the progress of each project within the program; and (3) to showcase the scientific expertise and research progress over the past year to senior managers within the DOE Office of Science, the technology offices within DOE, and other invited attendees from other Federal Agencies. This past year has seen a few significant changes within BER and within the SBR program. In November, our Associate Director for BER, Anna Palmisano, retired from Federal service. Just this month, Dr. Sharlene Weatherwax (Division Director for Biological Systems Sciences) has been named as the new Associate Director for BER. In August, BER welcomed Dr. Gary Geernaert as the new Division Director for CESD. Gary joins the division from Los Alamos National Laboratory with a background in atmospheric science. Within the SBR program, a new Strategic Plan was completed last June (currently posted on the SBR and the Office of Science website). The new strategic plan is intended to foster integration within the Environmental Systems Science portion of the BER budget that includes both SBR and Terrestrial Ecosystem Sciences (TES). Both these programs share a goal of advancing a predictive understanding of environmental processes and utilizing iterative, multidisciplinary approaches to understand complex environmental systems of relevance to DOE. CESD in general is undergoing continued discussions on integration among its programs in an effort to develop a new strategic plan for the division. This effort also includes identifying opportunities for integration with BER's Biological Systems Science Division (BSSD). The program this year includes three poster presentation sessions, six plenary sessions, and three breakout sessions. The plenary session on Tuesday morning will feature introductory presentations by BER program staff and three keynote addresses from Dr. Ken Bencala (USGS), Dr. Michael (Mick) Follows (MIT) and Dr. Sue Brantley (PSU) that will lead into three breakout sessions Tuesday afternoon. The breakout sessions are intended to highlight key developments in SBR research and foster a dialog among session participants on scientific paths forward in each particular area. The SBR program managers are asking for input from the SBR community at these sessions to help guide future efforts and/or identify areas of integration within BER programs. On Wednesday, plenary sessions will continue in the morning, followed by an early afternoon poster session. After an extended break for lunch, plenary sessions will continue in the afternoon, followed by an evening poster session. Thursday's plenary session will focus on selected highlights of research efforts at the IFRC sites and on a new potential TES field effort in the Arctic. This new field site is an obvious point of integration between the SBR and TES programs.

  5. Multiscale Subsurface Biogeochemical Modeling

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Biogeochemical Modeling Multiscale Subsurface Biogeochemical Modeling ScheibeSmaller.jpg Simulation of flow inside an experimental packed bed, performed on Franklin Key...

  6. Microbial Activity and Precipitation at Solution-Solution Mixing Zones in Porous Media Subsurface Biogeochemical Research

    SciTech Connect (OSTI)

    Colwell, Frederick; Wildenschild, Dorthe; Wood, Brian; Gerlach, Robin; Redden, George

    2014-08-29

    The goal for this research was to understand how best to add compounds to receptive microbial communities in porous media in order to achieve optimal calcite precipitation in a volumetrically significant space and to understand the physiological health of the cells that are responsible for the calcite precipitation. The specific objectives were to: (1) develop better tools for visually examining biofilms in porous media and calcium carbonate precipitation being mediated by microbes in porous media, and (2) demonstrate the effectiveness of using that tool within a flow cell model system.

  7. Collaborative Research. Quantifying Climate Feedbacks of the Terrestrial Biosphere under Thawing Permafrost Conditions in the Arctic

    SciTech Connect (OSTI)

    Zhuang, Qianlai; Schlosser, Courtney; Melillo, Jerry; Walter, Katey

    2015-09-15

    Our overall goal is to quantify the potential for threshold changes in natural emission rates of trace gases, particularly methane and carbon dioxide, from pan-arctic terrestrial systems under the spectrum of anthropogenically-forced climate warming, and the conditions under which these emissions provide a strong feedback mechanism to global climate warming. This goal is motivated under the premise that polar amplification of global climate warming will induce widespread thaw and degradation of the permafrost, and would thus cause substantial changes to the landscape of wetlands and lakes, especially thermokarst (thaw) lakes, across the Arctic. Through a suite of numerical experiments that encapsulate the fundamental processes governing methane emissions and carbon exchanges as well as their coupling to the global climate system - we intend to test the following hypothesis in the proposed research: There exists a climate warming threshold beyond which permafrost degradation becomes widespread and stimulates large increases in methane emissions (via thermokarst lakes and poorly-drained wetland areas upon thawing permafrost along with microbial metabolic responses to higher temperatures) and increases in carbon dioxide emissions from well-drained areas. Besides changes in biogeochemistry, this threshold will also influence global energy dynamics through effects on surface albedo, evapotranspiration and water vapor. These changes would outweigh any increased uptake of carbon (e.g. from peatlands and higher plant photosynthesis) and would result in a strong, positive feedback to global climate warming.

  8. Geoelectrical Measurement of Multi-Scale Mass Transfer Parameters Final Report to the Subsurface Biogeochemical Research Program

    SciTech Connect (OSTI)

    Day-Lewis, Frederick; Singha, Kamini; Haggerty, Roy; Johnson, Timothy; Binley, Andrew; Lane, John

    2014-03-10

    . In this project, we sought to capitalize on the geophysical signatures of mass transfer. Previous numerical modeling and pilot-scale field experiments suggested that mass transfer produces a geoelectrical signaturea hysteretic relation between sampled (mobile-domain) fluid conductivity and bulk (mobile + immobile) conductivityover a range of scales relevant to aquifer remediation. In this work, we investigated the geoelectrical signature of mass transfer during tracer transport in a series of controlled experiments to determine the operation of controlling parameters, and also investigated the use of complex-resistivity (CR) as a means of quantifying mass transfer parameters in situ without tracer experiments. In an add-on component to our grant, we additionally considered nuclear magnetic resonance (NMR) to help parse mobile from immobile porosities. Our study objectives were to: 1. Develop and demonstrate geophysical approaches to measure mass-transfer parameters spatially and over a range of scales, including the combination of electrical resistivity monitoring, tracer tests, complex resistivity, nuclear magnetic resonance, and materials characterization; and 2. Provide mass-transfer estimates for improved understanding of contaminant fate and transport at DOE sites, such as uranium transport at the Hanford 300 Area. To achieve our objectives, we implemented a 3-part research plan involving (1) development of computer codes and techniques to estimate mass-transfer parameters from time-lapse electrical data; (2) bench-scale experiments on synthetic materials and materials from cores from the Hanford 300 Area; and (3) field demonstration experiments at the DOEs Hanford 300 Area.

  9. Final Project Report: "??Exploratory Research: Mercury Stable Isotopes as Indicators of the Biogeochemical Cycling of Mercury"?

    SciTech Connect (OSTI)

    Johnson, Thomas M

    2012-08-01

    This is the final project report for award DE-SC0005351, which supported the research project "??Exploratory Research: Mercury Stable Isotopes as Indicators of the Biogeochemical Cycling of Mercury."? This exploratory project investigated the use of mercury (Hg) stable isotope measurements as a new approach to study how Hg moves and changes its chemical form in environmental systems, with particular focus on the East Fork of Poplar Creek (EFPC) near the DOE Y-12 plant (a Hg contamination source). This study developed analytical methods and collected pilot data that have set the stage for more detailed studies and have begun to provide insights into Hg movement and chemical changes. The overall Hg stable isotope approach was effective. The Hg isotope analysis methods yielded high-precision measurements of the sediment, water, and fish samples analyzed; quality control measures demonstrated the precision. The pilot data show that the 202Hg/198Hg, 199Hg/198Hg, and 201Hg/198Hg isotope ratios vary in this system. 202Hg/198Hg ratios of the Hg released from the Y-12 plant are relatively high, and those of the regional Hg background in soils and river sediments are significantly lower. Unfortunately, 202Hg/198Hg differences that might have been useful to distinguish early Hg releases from later releases were not observed. However, 202Hg/198Hg ratios in sediments do provide insights into chemical transformations that may occur as Hg moves through the system. Furthermore, 199Hg/198Hg and 201Hg/198Hg ratio analyses of fish tissues indicate that the effects of sunlight-driven chemical reactions on the Hg that eventually ends up in EFPC fish are measureable, but small. These results provide a starting point for a more detailed study (already begun at Univ. of Michigan) that will continue Hg isotope ratio work aimed at improving understanding of how Hg moves, changes chemically, and does or does not take on more highly toxic forms in the Oak Ridge area. This work also benefits efforts to trace Hg contamination in the Clinch and Tennessee Rivers, into which EFPC flows, and to distinguish Hg from the Y-12 plant from that released from a nearby coal ash accident.

  10. A Generic Biogeochemical Module for Earth System Models: Next Generation BioGeoChemical Module (NGBGC), Version 1.0

    SciTech Connect (OSTI)

    Fang, Yilin; Huang, Maoyi; Liu, Chongxuan; Li, Hongyi; Leung, Lai-Yung R.

    2013-11-13

    Physical and biogeochemical processes regulate soil carbon dynamics and CO2 flux to and from atmosphere, influencing global climate changes. Integration of these processes into earth system models (e.g., community land models (CLM)), however, currently faces three major challenges: 1) extensive efforts are required to modify modeling structures and to rewrite computer programs to incorporate new or updated processes as new knowledge is being generated, 2) computational cost is prohibitively expensive to simulate biogeochemical processes in land models due to large variations in the rates of biogeochemical processes, and 3) various mathematical representations of biogeochemical processes exist to incorporate different aspects of fundamental mechanisms, but systematic evaluation of the different mathematical representations is difficult, if not possible. To address these challenges, we propose a new computational framework to easily incorporate physical and biogeochemical processes into land models. The new framework consists of a new biogeochemical module with a generic algorithm and reaction database so that new and updated processes can be incorporated into land models without the need to manually set up the ordinary differential equations to be solved numerically. The reaction database consists of processes of nutrient flow through the terrestrial ecosystems in plants, litter and soil. This framework facilitates effective comparison studies of biogeochemical cycles in an ecosystem using different conceptual models under the same land modeling framework. The approach was first implemented in CLM and benchmarked against simulations from the original CLM-CN code. A case study was then provided to demonstrate the advantages of using the new approach to incorporate a phosphorus cycle into the CLM model. To our knowledge, the phosphorus-incorporated CLM is a new model that can be used to simulate phosphorus limitation on the productivity of terrestrial ecosystems.

  11. Trends and Future Challenges in Sampling the Deep Terrestrial Biosphere

    SciTech Connect (OSTI)

    Wilkins, Michael J.; Daly, Rebecca; Mouser, Paula J.; Trexler, Ryan; Sharma, Shihka; Cole, David R.; Wrighton, Kelly C.; Biddle , Jennifer F.; Denis, Elizabeth; Fredrickson, Jim K.; Kieft, Thomas L.; Onstott, T. C.; Peterson, Lee; Pfiffner, Susan M.; Phelps, Tommy J.; Schrenk, Matthew O.

    2014-09-12

    Research in the deep terrestrial biosphere is driven by interest in novel biodiversity and metabolisms, biogeochemical cycling, and the impact of human activities on this ecosystem. As this interest continues to grow, it is important to ensure that when subsurface investigations are proposed, materials recovered from the subsurface are sampled and preserved in an appropriate manner to limit contamination and ensure preservation of accurate microbial, geochemical, and mineralogical signatures. On February 20th, 2014, a workshop on “Trends and Future Challenges in Sampling The Deep Subsurface” was coordinated in Columbus, Ohio by The Ohio State University and West Virginia University faculty, and sponsored by The Ohio State University and the Sloan Foundation’s Deep Carbon Observatory. The workshop aims were to identify and develop best practices for the collection, preservation, and analysis of terrestrial deep rock samples. This document summarizes the information shared during this workshop.

  12. [Climate implications of terrestrial paleoclimate]. Quaternary Sciences Center, Desert Research Institute annual report, fiscal year 1994/1995

    SciTech Connect (OSTI)

    Wigand, P.E.

    1995-12-31

    The objective of this study is to collect terrestrial climate indicators for paleoclimate synthesis. The paleobiotic and geomorphic records are being examined for the local and regional impact of past climates to assess Yucca Mountain`s suitability as a high-level nuclear waste repository. In particular these data are being used to provide estimates of the timing, duration and extremes of past periods of moister climate for use in hydrological models of local and regional recharge that are being formulated by USGS and other hydrologists for the Yucca Mountain area. The project includes botanical, faunal, and geomorphic components that will be integrated to accomplish this goal. To this end personnel at the Quaternary Sciences Center of the Desert Research Institute in Reno, Nevada are conducting the following activities: Analyses of packrat middens; Analysis of pollen samples; and Determination of vegetation climate relationships.

  13. Terrestrial sequestration

    ScienceCinema (OSTI)

    Charlie Byrer

    2010-01-08

    Terrestrial sequestration is the enhancement of CO2 uptake by plants that grow on land and in freshwater and, importantly, the enhancement of carbon storage in soils where it may remain more permanently stored. Terrestrial sequestration provides an opportunity for low-cost CO2 emissions offsets.

  14. Terrestrial sequestration

    SciTech Connect (OSTI)

    Charlie Byrer

    2008-03-10

    Terrestrial sequestration is the enhancement of CO2 uptake by plants that grow on land and in freshwater and, importantly, the enhancement of carbon storage in soils where it may remain more permanently stored. Terrestrial sequestration provides an opportunity for low-cost CO2 emissions offsets.

  15. DOE Final Report on Collaborative Research. Quantifying Climate Feedbacks of the Terrestrial Biosphere under Thawing Permafrost Conditions in the Arctic

    SciTech Connect (OSTI)

    Zhuang, Qianlai; Schlosser, C. Adam; Melillo, Jerry M.; Anthony, Katey Walter; Kicklighter, David; Gao, Xiang

    2015-11-03

    Our overall goal is to quantify the potential for threshold changes in natural emission rates of trace gases, particularly methane and carbon dioxide, from pan-arctic terrestrial systems under the spectrum of anthropogenically-forced climate warming, and the conditions under which these emissions provide a strong feedback mechanism to global climate warming. This goal is motivated under the premise that polar amplification of global climate warming will induce widespread thaw and degradation of the permafrost, and would thus cause substantial changes to the landscape of wetlands and lakes, especially thermokarst (thaw) lakes, across the Arctic. Through a suite of numerical experiments that encapsulate the fundamental processes governing methane emissions and carbon exchanges as well as their coupling to the global climate system - we intend to test the following hypothesis in the proposed research: There exists a climate warming threshold beyond which permafrost degradation becomes widespread and stimulates large increases in methane emissions (via thermokarst lakes and poorly-drained wetland areas upon thawing permafrost along with microbial metabolic responses to higher temperatures) and increases in carbon dioxide emissions from well-drained areas. Besides changes in biogeochemistry, this threshold will also influence global energy dynamics through effects on surface albedo, evapotranspiration and water vapor. These changes would outweigh any increased uptake of carbon (e.g. from peatlands and higher plant photosynthesis) and would result in a strong, positive feedback to global climate warming.

  16. A Reactive Transport Simulator for Biogeochemical Processes in Subsurface System

    Energy Science and Technology Software Center (OSTI)

    2003-04-01

    BIOGEOCHEM is a Fortran code that mumerically simulates the coupled processes of solute transport, microbial population dynamics, microbial metabolism, and geochemical reactions. The potential applications of the code include, but not limited to, (a) sensitivity and uncertainty analyses for assessing the impact of microbial activity on subsurface geochemical systems; (b) extraction of biogeochemical parameter values from field observations or laboratory measurements, (c) helping to design and optimize laboratory biogeochemical experiments, and (d) data integration. Methodmore » of Solution: A finite difference method and a Newton-Raphson technique are used to solve a set of coupled nonlinear partial differential equations and algebraic equations. Practical Application: Environmental analysis, bioremediation performance assessments of radioactive or non-radioactive wase disposal, and academic research.« less

  17. Applying computationally efficient schemes for biogeochemical cycles

    Office of Scientific and Technical Information (OSTI)

    (ACES4BGC) (Technical Report) | SciTech Connect Applying computationally efficient schemes for biogeochemical cycles (ACES4BGC) Citation Details In-Document Search Title: Applying computationally efficient schemes for biogeochemical cycles (ACES4BGC) NCAR contributed to the ACES4BGC project through software engineering work on aerosol model implementation, build system and script changes, coupler enhancements for biogeochemical tracers, improvements to the Community Land Model (CLM) code and

  18. Biogeochemical Controls | U.S. DOE Office of Science (SC)

    Office of Science (SC) Website

    Biogeochemical Controls Laboratory Policy (LP) LP Home About Laboratory Appraisal Process Laboratory Planning Process Laboratory Directed Research and Development (LDRD) Frequently Asked Questions Impact Legislative History Program Contacts Management & Operating (M&O) Contracts Technology Transfer Work for Others Contact Information Laboratory Policy U.S. Department of Energy SC-32/Forrestal Building 1000 Independence Ave., SW Washington, DC 20585 P: (202) 586-5447 F: (202) 586-3119

  19. Terrestrial Carbon Cycle

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Terrestrial Carbon Cycle "Only about half of the CO2 released into the atmosphere by human activities currently resides in the atmosphere, the rest absorbed on land and in the oceans. The period over which the carbon will be sequestered is unclear, and the efficiency of future sinks is unknown." US Carbon Cycle Research Plan "We" desire to be able to predict the future spatial and temporal distribution of sources and sinks of atmospheric CO2 and their interaction (forcing and

  20. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    to Terrestrial Radiation Download a printable PDF Submitter: Mitchell, D. L., Desert Research Institute Area of Research: General Circulation and Single Column Models...

  1. Modeling the role of terrestrial ecosystems in the global carbon cycle

    SciTech Connect (OSTI)

    Emanuel, W.R.; Post, W.M.; Shugart, H.H. Jr.

    1980-01-01

    A model for the global biogeochemical cycle of carbon which includes a five-compartment submodel for circulation in terrestrial ecosystems of the world is presented. Although this terrestrial submodel divides carbon into compartments with more functional detail than previous models, the variability in carbon dynamics among ecosystem types and in different climatic zones is not adequately treated. A new model construct which specifically treats this variability by modeling the distribution of ecosystem types as a function of climate on a 0.5/sup 0/ latitude by 0.5/sup 0/ longitude scale of resolution is proposed.

  2. Coupled Biogeochemical Process Evaluation for Conceptualizing Trichloroethylene Co-Metabolism

    SciTech Connect (OSTI)

    Colwell, Frederick; Radtke, Corey; Newby, Deborah; Delwiche, Mark; Crawf, Ronald L.; Paszczynski, Andrzej; Strap, Janice; Conrad, Mark; Brodic, Eoin; Starr, Robert; Lee, Hope

    2006-04-05

    Chlorinated solvent wastes (e.g., trichloroethene or TCE) often occur as diffuse subsurface plumes in complex geological environments where coupled processes must be understood in order to implement remediation strategies. Monitored natural attenuation (MNA) warrants study as a remediation technology because it minimizes worker and environment exposure to the wastes and because it costs less than other technologies. However, to be accepted MNA requires 'lines of evidence' indicating that the wastes are effectively destroyed. Our research will study the coupled biogeochemical processes that dictate the rate of TCE co-metabolism in contaminated aquifers first at the Idaho National Laboratory and then at Paducah or the Savannah River Site, where natural attenuation of TCE is occurring. We will use flow-through in situ reactors to investigate the rate of methanotrophic co-metabolism of TCE and the coupling of the responsible biological processes with the dissolved methane flux and groundwater flow velocity. We will use new approaches (e.g., stable isotope probing, enzyme activity probes, real-time reverse transcriptase polymerase chain reaction, proteomics) to assay the TCE co-metabolic rates, and interpret these rates in the context of enzyme activity, gene expression, and cellular inactivation related to intermediates of TCE co-metabolism. By determining the rate of TCE co-metabolism at different methane concentrations and groundwater flow velocities, we will derive key modeling parameters for the computational simulations that describe the attenuation, and thereby refine such models while assessing the contribution of microbial relative to other natural attenuation processes. This research will strengthen our ability to forecast the viability of MNA at DOE and other sites that are contaminated with chlorinated hydrocarbons.

  3. Coupled Biogeochemical Process Evaluation for Conceptualizing Trichloroethylene Co-Metabolism

    SciTech Connect (OSTI)

    Rick Colwell; Corey Radtke; Mark Delwiche; Deborah Newby; Lynn Petzke; Mark Conrad; Eoin Brodie; Hope Lee; Bob Starr; Dana Dettmers; Ron Crawford; Andrzej Paszczynski; Nick Bernardini; Ravi Paidisetti; Tonia Green

    2006-06-01

    Chlorinated solvent wastes (e.g., trichloroethene or TCE) often occur as diffuse subsurface plumes in complex geological environments where coupled processes must be understood in order to implement remediation strategies. Monitored natural attenuation (MNA) warrants study as a remediation technology because it minimizes worker and environment exposure to the wastes and because it costs less than other technologies. However, to be accepted MNA requires different ?lines of evidence? indicating that the wastes are effectively destroyed. We are studying the coupled biogeochemical processes that dictate the rate of TCE co-metabolism first in the medial zone (TCE concentration: 1,000 to 20,000 ?g/L) of a plume at the Idaho National Laboratory?s Test Area North (TAN) site and then at Paducah or the Savannah River Site. We will use flow-through in situ reactors (FTISR) to investigate the rate of methanotrophic co-metabolism of TCE and the coupling of the responsible biological processes with the dissolved methane flux and groundwater flow velocity. TCE co-metabolic rates at TAN are being assessed and interpreted in the context of enzyme activity, gene expression, and cellular inactivation related to intermediates of TCE co-metabolism. By determining the rate of TCE co-metabolism at different groundwater flow velocities, we will derive key modeling parameters for the computational simulations that describe the attenuation, and thereby refine such models while assessing the contribution of microbial co-metabolism relative to other natural attenuation processes. This research will strengthen our ability to forecast the viability of MNA at DOE and other sites contaminated with chlorinated hydrocarbons.

  4. Relative importance of multiple factors on terrestrial loading of DOC to Arctic river networks

    SciTech Connect (OSTI)

    Kicklighter, David W.; Hayes, Daniel J; Mcclelland, James W; Peterson, Bruce; Mcguire, David; Melillo, Jerry

    2014-01-01

    Terrestrial carbon dynamics influence the contribution of dissolved organic carbon (DOC) to river networks in addition to controlling carbon fluxes between the land surface and the atmosphere. In this study, we use a biogeochemical process model to simulate the lateral transfer of DOC from land to the Arctic Ocean via riverine transport. We estimate that the pan-arctic watershed has contributed, on average, 32 Tg C/yr of DOC to the Arctic Ocean over the 20th century with most coming from the extensive area of boreal deciduous needle-leaved forests and forested wetlands in Eurasian watersheds. We also estimate that the rate of terrestrial DOC loading has been increasing by 0.037 Tg C/yr2 over the 20th century primarily as a result of increases in air temperatures and precipitation. These increases have been partially compensated by decreases in terrestrial DOC loading caused by wildfires. Other environmental factors (CO2 fertilization, ozone pollution, atmospheric nitrogen deposition, timber harvest, agriculture) are estimated to have relatively small effects on terrestrial DOC loading to arctic rivers. The effects of the various environmental factors on terrestrial carbon dynamics have both compensated and enhanced concurrent effects on hydrology to influence terrestrial DOC loading. Future increases in riverine DOC concentrations and export may occur from warming-induced increases in terrestrial DOC production associated with enhanced microbial metabolism and the exposure of additional organic matter from permafrost degradation along with decreases in water yield associated with warming-induced increases in evapotranspiration. Improvements in simulating terrestrial DOC loading to pan-arctic rivers in the future will require better information on the spatial distribution of precipitation and its temporal trends, carbon dynamics of larch-dominated ecosystems in eastern Siberia, and the role of industrial organic effluents on carbon budgets of rivers in western Russia.

  5. Natural Organobromine in Marine Sediments: New Evidence of Biogeochemical Br Cycling

    SciTech Connect (OSTI)

    A Leri; J Hakala; M Marcus; A Lanzirotti; C Reddy; S Myneni

    2011-12-31

    Organobromine (Br{sub org}) compounds, commonly recognized as persistent, toxic anthropogenic pollutants, are also produced naturally in terrestrial and marine systems. Several enzymatic and abiotic bromination mechanisms have been identified, as well as an array of natural Br{sub org} molecules associated with various marine organisms. The fate of the carbon-bromine functionality in the marine environment, however, remains largely unexplored. Oceanographic studies have noted an association between bromine (Br) and organic carbon (C{sub org}) in marine sediments. Even so, there has been no direct chemical evidence that Br in the sediments exists in a stable form apart from inorganic bromide (Br{sub inorg}), which is widely presumed conservative in marine systems. To investigate the scope of natural Br{sub org} production and its fate in the environment, we probed Br distribution and speciation in estuarine and marine sediments using in situ X-ray spectroscopy and spectromicroscopy. We show that Br{sub org} is ubiquitous throughout diverse sedimentary environments, occurring in correlation with C{sub org} and metals such as Fe, Ca, and Zn. Analysis of sinking particulate carbon from the seawater column links the Br{sub org} observed in sediments to biologically produced Br{sub org} compounds that persist through humification of natural organic matter (NOM). Br speciation varies with sediment depth, revealing biogeochemical cycling of Br between organic and inorganic forms as part of the burial and degradation of NOM. These findings illuminate the chemistry behind the association of Br with Corg in marine sediments and cast doubt on the paradigmatic classification of Br as a conservative element in seawater systems.

  6. Characterization of Coupled Hydrologic-Biogeochemical Processes Using Geophysical Data

    SciTech Connect (OSTI)

    Hubbard, Susan

    2005-06-01

    Biogeochemical and hydrological processes are naturally coupled and variable over a wide range of spatial and temporal scales. Many remediation approaches also induce dynamic transformations in natural systems, such as the generation of gases, precipitates and biofilms. These dynamic transformations are often coupled and can reduce the hydraulic conductivity of the geologic materials, making it difficult to introduce amendments or to perform targeted remediation. Because it is difficult to predict these transformations, our ability to develop effective and sustainable remediation conditions at contaminated sites is often limited. Further complicating the problem is the inability to collect the necessary measurements at a high enough spatial resolution yet over a large enough volume for understanding field-scale transformations.

  7. Coastal-zone biogeochemical dynamics under global warming

    SciTech Connect (OSTI)

    Mackenzie, F.T.; Ver, L.M.; Lerman, A.

    2000-03-01

    The coastal zone, consisting of the continental shelves to a depth of 200 meters, including bays, lagoons, estuaries, and near-shore banks, is an environment that is strongly affected by its biogeochemical and physical interactions with reservoirs in the adjacent domains of land, atmosphere, open ocean, and marine sediments. Because the coastal zone is smaller in volume and area coverage relative to the open ocean, it traditionally has been studied as an integral part of the global oceans. In this paper, the authors show by numerical modeling that it is important to consider the coastal zone as an entity separate from the open ocean in any assessment of future Earth-system response under human perturbation. Model analyses for the early part of the 21st century suggest that the coastal zone plays a significant modifying role in the biogeochemical dynamics of the carbon cycle and the nutrient cycles coupled to it. This role is manifested in changes in primary production, storage, and/or export of organic matter, its remineralization, and calcium carbonate precipitation--all of which determine the state of the coastal zone with respect to exchange of CO{sub 2} with the atmosphere. Under a scenario of future reduced or complete cessation of the thermohaline circulation (THC) of the global oceans, coastal waters become an important sink for atmospheric CO{sub 2}, as opposed to the conditions in the past and present, when coastal waters are believed to be a source of CO{sub 2} to the atmosphere. Profound changes in coastal-zone primary productivity underscore the important role of phosphorus as a limiting nutrient. In addition, calculations indicate that the saturation state of coastal waters with respect to carbonate minerals will decline by {approximately}15% by the year 2030. Any future slowdown in the THC of the oceans will increase slightly the rate of decline in saturation state.

  8. Solar terrestrial coupling through space plasma processes

    SciTech Connect (OSTI)

    Birn, J.

    2000-12-01

    This is the final report of a three-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The project investigates plasma processes that govern the interaction between the solar wind, charged particles ejected from the sun, and the earth's magnetosphere, the region above the ionosphere governed by the terrestrial magnetic field. Primary regions of interest are the regions where different plasma populations interact with each other. These are regions of particularly dynamic plasma behavior, associated with magnetic flux and energy transfer and dynamic energy release. The investigations concerned charged particle transport and energization, and microscopic and macroscopic instabilities in the magnetosphere and adjacent regions. The approaches combined space data analysis with theory and computer simulations.

  9. Terrestrial Ecosystem Science | U.S. DOE Office of Science (SC)

    Office of Science (SC) Website

    Terrestrial Ecosystem Science Biological and Environmental Research (BER) BER Home About Research 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

  10. Research Facilities | Savannah River Ecology Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Research Facilities In keeping with its integrated approach to environmental research, SREL has a wide range of analytical and experimental capabilities, from biogeochemical, radiological, and genetic analyses to plant, animal, and microbial facilities, two unique experimental facilities, and standard tools for an array of field research. Radioecology Microbiology Experimental Facilities Biogeochemistry DNA Laboratory Field Research RADIOECOLOGY Scintillation spec. Gamma counter Animal body

  11. Research

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Research Research Isotopes produced at Los Alamos National Laboratory are saving lives, advancing cutting-edge research and keeping the U.S. safe. Research thorium test foil A thorium test foil target for proof-of-concept actinium-225 production In addition to our routine isotope products, the LANL Isotope Program is focused on developing the next suite of isotopes and services to meet the Nation's emerging needs. The LANL Isotope Program's R&D strategy is focused on four main areas (see

  12. Webinar-Terrestrial Solar Spectral Modeling for Renewable Energy...

    Open Energy Info (EERE)

    Webinar-Terrestrial Solar Spectral Modeling for Renewable Energy: SMARTS Model Jump to: navigation, search Tool Summary Name: Webinar-Terrestrial Solar Spectral Modeling for...

  13. Terrestrial Climate Change and Ecosystem Response Recorded in...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Terrestrial Climate Change and Ecosystem Response Recorded in Lake Sediments and Related Deposits Reconstruction of past terrestrial climate and ecosystem response relies on...

  14. Biological and Environmental Research

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Biological and Environmental Research Biological and Environmental Research Understanding how genomic information is translated to functional capabilities, and the roles of Earth's biogeochemical systems so we can predict climate decades or centuries into the future. Get Expertise Cheryl Kuske (505) 665-4800 Email James Bossert (505) 667-3644 Email Manvendra Dubey (505) 665-3128 Email Kim Nitschke (505) 667-1186 Email Phil Jones (505) 667-6387 Email Cathy Wilson (505) 667-0202 Email Conducting

  15. DOE Manual Studies Terrestrial Carbon Sequestration

    Broader source: Energy.gov [DOE]

    There is considerable opportunity and growing technical sophistication to make terrestrial carbon sequestration both practical and effective, according to the latest carbon capture and storage "best practices" manual issued by the U.S. Department of Energy.

  16. High-resolution mineralogical characterization and biogeochemical modeling of uranium reaction pathways at the FRC

    SciTech Connect (OSTI)

    Chen Zhu

    2006-06-15

    High-Resolution Mineralogical Characterization and Biogeochemical Modeling of Uranium Reduction Pathways at the Oak Ridge Field-Research Center (FRC) Chen Zhu, Indiana University, David R. Veblen, Johns Hopkins University We have successfully completed a proof-of-concept, one-year grant on a three-year proposal from the former NABIR program, and here we seek additional two-year funding to complete and publish the research. Using a state-of-the-art 300-kV, atomic resolution, Field Emission Gun Transmission Electron Microscope (TEM), we have successfully identified three categories of mineral hosts for uranium in contaminated soils: (1) iron oxides; (2) mixed manganese-iron oxides; and (3) uranium phosphates. Method development using parallel electron energy loss spectroscopy (EELS) associated with the TEM shows great promise for characterizing the valence states of immobilized U during bioremediation. We have also collected 27 groundwater samples from two push-pull field biostimulation tests, which form two time series from zero to approximately 600 hours. The temporal evolution in major cations, anions, trace elements, and the stable isotopes 34S, 18O in sulfate, 15N in nitrate, and 13C in dissolved inorganic carbon (DIC) clearly show that biostimulation resulted in reduction of nitrate, Mn(IV), Fe(III), U(VI), sulfate, and Tc(VII), and these reduction reactions were intimately coupled with a complex network of inorganic reactions evident from alkalinity, pH, Na, K, Mg, and Ca concentrations. From these temporal trends, apparent zero order rates were regressed. However, our extensive suite of chemical and isotopic data sets, perhaps the first and only comprehensive data set available at the FRC, show that the derived rates from these field biostimulation experiments are composite and lump-sum rates. There were several reactions that were occurring at the same time but were masked by these pseudo-zero order rates. A reaction-path model comprising a total of nine redox couples (NO3–/NH4+, MnO2(s)/Mn2+, Fe(OH)3(s) /Fe2+, TcO4–/TcO2(s), UO22+/UO2(s), SO42–/HS–, CO2/CH4, ethanol/acetate, and H+/H2.) is used to simulate the temporal biogeochemical evolution observed in the field tests. Preliminary results show that the models based on thermodynamics and more complex rate laws can generate the apparent zero order rates when several concurrent or competing reactions occur. Professor Alex Halliday of Oxford University, UK, and his postdoctoral associates are measuring the uranium isotopes in our groundwater samples. Newly developed state-of-the-art analytical techniques in measuring variability in 235U/238U offer the potential to distinguish biotic and abiotic uranium reductive mechanisms.

  17. Microsoft Word - Biogeochem_Wrkshp_Final_Sched.doc

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Synchrotron Techniques for Environmental Microbiology and Biogeochemistry Environmental microbiology and geomicrobiology have emerged as vibrant scientific fields with cross-cutting research themes emphasizing the interplay and energy flow between microbial communities, inorganic and organic contaminants, (bio)minerals, groundwater, and other solutions. Synchrotron (SR)-based techniques are beginning to play important roles in these research areas because of the utility of SR methods for

  18. Biogeochemical Mechanisms Controlling Reduced Radionuclide Particle Properties and Stability

    SciTech Connect (OSTI)

    Jim K. Fredrickson; John M. Zachara; Matthew J. Marshall; Alex S. Beliaev

    2006-06-01

    Uranium and Technetium are the major risk-driving contaminants at Hanford and other DOE sites. These radionuclides have been shown to be reduced by dissimilatory metal reducing bacteria (DMRB) under anoxic conditions. Laboratory studies have demonstrated that reduction results in the formation of poorly soluble hydrous oxides, UO2(s) and TcO2n?H2O(s), that are believed to limit mobility in the environment. The mechanisms of microbial reduction of U and Tc have been the focus of considerable research in the Environmental Remediation Sciences Program (ERSP). In spite of equal or greater importance in terms of controlling the environmental fate of the contaminants relatively little is known regarding the precipitation mechanism(s), reactivity, persistence, and transport of biogenic UO2(s) and TcO2(s).

  19. 2015 Peer Review Presentations-Terrestrial Feedstocks | Department of

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Energy Terrestrial Feedstocks 2015 Peer Review Presentations-Terrestrial Feedstocks The Bioenergy Technologies Office hosted its 2015 Project Peer Review on March 23-27, 2015, at the Hilton Mark Center in Alexandria, Virginia. The presentations from the terrestrial feedstocks sessions are available to view and download below. For detailed session descriptions and presentation titles, view the 2015 Project Peer Review Program Booklet. PDF icon terrestrial_feedstocks_owens_7625.pdf PDF icon

  20. Novel imaging techniques, integrated with mineralogical, geochemical and microbiological characterizations to determine the biogeochemical controls on technetium mobility in FRC sediments

    SciTech Connect (OSTI)

    Jonathan R. Lloyd

    2009-02-03

    The objective of this research program was to take a highly multidisciplinary approach to define the biogeochemical factors that control technetium (Tc) mobility in FRC sediments. The aim was to use batch and column studies to probe the biogeochemical conditions that control the mobility of Tc at the FRC. Background sediment samples from Area 2 (pH 6.5, low nitrate, low {sup 99}Tc) and Area 3 (pH 3.5, high nitrate, relatively high {sup 99}Tc) of the FRC were selected (http://www.esd.ornl.gov/nabirfrc). For the batch experiments, sediments were mixed with simulated groundwater, modeled on chemical constituents of FRC waters and supplemented with {sup 99}Tc(VII), both with and without added electron donor (acetate). The solubility of the Tc was monitored, alongside other biogeochemical markers (nitrate, nitrite, Fe(II), sulfate, acetate, pH, Eh) as the 'microcosms' aged. At key points, the microbial communities were also profiled using both cultivation-dependent and molecular techniques, and results correlated with the geochemical conditions in the sediments. The mineral phases present in the sediments were also characterized, and the solid phase associations of the Tc determined using sequential extraction and synchrotron techniques. In addition to the batch sediment experiments, where discrete microbial communities with the potential to reduce and precipitate {sup 99}Tc will be separated in time, we also developed column experiments where biogeochemical processes were spatially separated. Experiments were conducted both with and without amendments proposed to stimulate radionuclide immobilization (e.g. the addition of acetate as an electron donor for metal reduction), and were also planned with and without competing anions at high concentration (e.g. nitrate, with columns containing Area 3 sediments). When the columns had stabilized, as determined by chemical analysis of the effluents, we used a spike of the short-lived gamma emitter {sup 99m}Tc (50-200 MBq; half life 6 hours) and its mobility was monitored using a {gamma}-camera. Incorporation of low concentrations of the long-lived 99Tc gave a tracer that can be followed by scintillation counting, should the metastable form of the radionuclide decay to below detection limits before the end of the experiment (complete immobilization or loss of the Tc from the column). After the Tc was reduced and immobilized, or passed through the system, the columns were dismantled carefully in an anaerobic cabinet and the pore water geochemistry and mineralogy of the columns profiled. Microbial community analysis was determined, again using molecular and culture-dependent techniques. Experimental results were also modeled using an established coupled speciation and transport code, to develop a predictive tool for the mobility of Tc in FRC sediments. From this multidisciplinary approach, we hoped to obtain detailed information on the microorganisms that control the biogeochemical cycling of key elements at the FRC, and we would also be able to determine the key factors that control the mobility of Tc at environmentally relevant concentrations at this site.

  1. Biogeochemical Changes at Early Stage After the Closure of Radioactive Waste Geological Repository in South Korea

    SciTech Connect (OSTI)

    Choung, Sungwook; Um, Wooyong; Choi, Seho; Francis, Arokiasamy J.; Kim, Sungpyo; Park, Jin beak; Kim, Suk-Hoon

    2014-09-01

    Permanent disposal of low- and intermediate-level radioactive wastes in the subterranean environment has been the preferred method of many countries, including Korea. A safety issue after the closure of a geological repository is that biodegradation of organic materials due to microbial activities generates gases that lead to overpressure of the waste containers in the repository and its disintegration with the release of radionuclides. As part of an ongoing large-scale in situ experiment using organic wastes and groundwater to simulate geological radioactive waste repository conditions, we investigated the geochemical alteration and microbial activities at an early stage (~63 days) intended to be representative of the initial period after repository closure. The increased numbers of both aerobes and facultative anaerobes in waste effluents indicate that oxygen content could be the most significant parameter to control biogeochemical conditions at very early periods of reaction (<35 days). Accordingly, the values of dissolved oxygen and redox potential were decreased. The activation of anaerobes after 35 days was supported by the increased concentration to ~50 mg L-1 of ethanol. These results suggest that the biogeochemical conditions were rapidly altered to more reducing and anaerobic conditions within the initial 2 months after repository closure. Although no gases were detected during the study, activated anaerobic microbes will play more important role in gas generation over the long term.

  2. Advanced Stirling conversion systems for terrestrial applications

    SciTech Connect (OSTI)

    Shaltens, R.K.

    1987-01-01

    Sandia National Laboratories (SNLA) is developing heat engines for terrestrial Solar distributed Heat Receivers. SNLA has identified the Stirling to be one of the most promising candidates for the terrestrial applications. The free-piston Stirling engine (FPSE) has the potential to meet the DOE goals for both performance and cost. Free-piston Stirling activities which are directed toward a dynamic power source for the space application are being conducted. Space power system requirements include high efficiency, very long life, high reliability and low vibration. The FPSE has the potential for future high power space conversion systems, either solar or nuclear powered. Generic free-piston technology is currently being developed for use with a residential heat pump under an Interagency Agreement. Also, an overview is presented of proposed conceptual designs for the Advanced Stirling Conversion System (ASCS) using a free-piston Stirling engine and a liquid metal heat pipe receiver. Power extraction includes both a linear alternator and hydraulic output capable of delivering approximately 25 kW of electrical power to the electric utility grid. Target cost of the engine/alternator is 300 dollars per kilowatt at a manufacturing rate of 10,000 units per year. The design life of the ASCS is 60,000 h (30 y) with an engine overhaul at 40,000 h (20 y). Also discussed are the key features and characteristics of the ASCS conceptual designs.

  3. Plutonium Isotopes in the Terrestrial Environment at the Savannah River

    Office of Scientific and Technical Information (OSTI)

    Site, USA. A Long-Term Study (Journal Article) | SciTech Connect Journal Article: Plutonium Isotopes in the Terrestrial Environment at the Savannah River Site, USA. A Long-Term Study Citation Details In-Document Search Title: Plutonium Isotopes in the Terrestrial Environment at the Savannah River Site, USA. A Long-Term Study This work presents the findings of a long term plutonium study at Savannah River Site (SRS) conducted between 2003 and 2013. Terrestrial environmental samples were

  4. Plutonium Isotopes in the Terrestrial Environment at the Savannah...

    Office of Scientific and Technical Information (OSTI)

    Journal Article: Plutonium Isotopes in the Terrestrial Environment at the Savannah River Site, USA. A Long-Term Study Citation Details In-Document Search Title: Plutonium Isotopes...

  5. Using complex resistivity imaging to infer biogeochemical processes associated with bioremediation of a uranium-contaminated aquifer

    SciTech Connect (OSTI)

    Flores-Orozco, Adrian; Williams, Kenneth H.; Long, Philip E.; Hubbard, Susan S.; Kemna, Andreas

    2011-07-07

    Experiments at the Department of Energys Rifle Integrated Field Research Challenge (IFRC) site near Rifle, Colorado (USA) have demonstrated the ability to remove uranium from groundwater by stimulating the growth and activity of Geobacter species through acetate amendment. Prolonging the activity of these strains in order to optimize uranium bioremediation has prompted the development of minimally-invasive and spatially-extensive monitoring methods diagnostic of their in situ activity and the end products of their metabolism. Here we demonstrate the use of complex resistivity imaging for monitoring biogeochemical changes accompanying stimulation of indigenous aquifer microorganisms during and after a prolonged period (100+ days) of acetate injection. A thorough raw-data statistical analysis of discrepancies between normal and reciprocal measurements and incorporation of a new power-law phase-error model in the inversion were used to significantly improve the quality of the resistivity phase images over those obtained during previous monitoring experiments at the Rifle IRFC site. The imaging results reveal spatiotemporal changes in the phase response of aquifer sediments, which correlate with increases in Fe(II) and precipitation of metal sulfides (e.g., FeS) following the iterative stimulation of iron and sulfate reducing microorganism. Only modest changes in resistivity magnitude were observed over the monitoring period. The largest phase anomalies (>40 mrad) were observed hundreds of days after halting acetate injection, in conjunction with accumulation of Fe(II) in the presence of residual FeS minerals, reflecting preservation of geochemically reduced conditions in the aquifer a prerequisite for ensuring the long-term stability of immobilized, redox-sensitive contaminants, such as uranium.

  6. Using complex resistivity imaging to infer biogeochemical processes associated with bioremediation of a uranium-contaminated aquifer

    SciTech Connect (OSTI)

    Orozco, A. Flores; Williams, K.H.; Long, P.E.; Hubbard, S.S.; Kemna, A.

    2011-04-01

    Experiments at the Department of Energy's Rifle Integrated Field Research Challenge (IFRC) site near Rifle, Colorado (USA) have demonstrated the ability to remove uranium from groundwater by stimulating the growth and activity of Geobacter species through acetate amendment. Prolonging the activity of these strains in order to optimize uranium bioremediation has prompted the development of minimally-invasive and spatially-extensive monitoring methods diagnostic of their in situ activity and the end products of their metabolism. Here we demonstrate the use of complex resistivity imaging for monitoring biogeochemical changes accompanying stimulation of indigenous aquifer microorganisms during and after a prolonged period (100+ days) of acetate injection. A thorough raw-data statistical analysis of discrepancies between normal and reciprocal measurements and incorporation of a new power-law phase-error model in the inversion were used to significantly improve the quality of the resistivity phase images over those obtained during previous monitoring experiments at the Rifle IRFC site. The imaging results reveal spatiotemporal changes in the phase response of aquifer sediments, which correlate with increases in Fe(II) and precipitation of metal sulfides (e.g., FeS) following the iterative stimulation of iron and sulfate reducing microorganism. Only modest changes in resistivity magnitude were observed over the monitoring period. The largest phase anomalies (>40 mrad) were observed hundreds of days after halting acetate injection, in conjunction with accumulation of Fe(II) in the presence of residual FeS minerals, reflecting preservation of geochemically reduced conditions in the aquifer - a prerequisite for ensuring the long-term stability of immobilized, redox-sensitive contaminants, such as uranium.

  7. Novel Imaging Techniques, Integrated with Mineralogical, Geochemical and Microbiological Characterization to Determine the Biogeochemical Controls....

    SciTech Connect (OSTI)

    Lloyd, Jonathan R.

    2005-06-01

    Tc(VII) will be reduced and precipitated in FRC sediments under anaerobic conditions in batch experiments (progressive microcosms). The complementary microcosm experiments using low pH/nigh nitrate sediments from 3 (near FW 009) are imminent, with the sediment cores already shipped to Manchester. HYPOTHESIS 2. Tc(VII) reduction and precipitation can be visualized in discrete biogeochemical zones in sediment columns using 99mTc and a gamma-camera. Preliminary experiments testing the use of 99mTc as a radiotracer to address hypotheses 2 and 3 have suggested that the 99mTc associates with Fe(II)-bearing sediments in microcosms and stratified columns containing FRC sediments. Initial proof of concept microcosms containing Fe(II)-bearing, microbially-reduced FRC sediments were spiked with 99mTc and imaged using a gamma-camera. In comparison with oxic controls, 99mTc was significantly partitioned in the solid phase in Fe(III)-reducing sediments in batch experiments. Column experiments using FRC background area soil with stratified biogeochemical zones after stimulation of anaerobic processes through nutrient supplementation, suggested that 99mTc transport was retarded through areas of Fe(III) reduction. HYPOTHESIS 3. Sediment-bound reduced 99mTc can be solubilized by perturbations including oxidation coupled to biological nitrate reduction, and mobilization visualized in real-time using a gamma-camera. Significant progress has been made focusing on the impact of nitrate on the biogeochemical behavior of technetium. Additions of 100 mM nitrate to FRC sediment microcosms, which could potentially compete for electrons during metal reduction, inhibited the reduction of both Fe(III) and Tc(VII) completely. Experiments have also addressed the impact of high nitrate concentrations on Fe(II) and Tc(IV) in pre-reduced sediments, showing no significant resolubilization of Tc with the addition of 25 mM nitrate. A parallel set of experiments addressing the impact of aerobic conditions on the stability/solubility of Fe(II) and Tc(IV), found 80 % resolubilization of the Tc. Column experiments exploring this behavior are being planned. HYPOTHESIS 4 The mobility of 99mTc in the sediment columns can be modeled using a coupled speciation and transport code. Microbiological and geochemical characterization of the column experiments is ongoing and transport and geochemical modeling experiments are being planned.

  8. ACES4BGC Applying Computationally Efficient Schemes for BioGeochemical Cycles

    Office of Scientific and Technical Information (OSTI)

    ACES4BGC Applying Computationally Efficient Schemes for BioGeochemical Cycles Principal Investigator: Fo r r es t M. H o ff m a n ( O R N L ) Co-Investigators: Pavel B. B o c h e v ( SN L) , Philip J. C a m e r o n - S m i t h ( LLNL) , Ri chard C. East er , Jr. ( P N N L ) , S c o t t M. Elliott ( LANE ) , S t e v e n J. G h a n ( P N N L ) , X i a o h o n g Liu ( f or me rl y P N N L , U. W y o m i n g ) , R o b e r t B. Lowrie ( LA N L ) , D o n a l d D. Lu ca s ( LLNL) , P o - l un Ma ( P N

  9. Thermoelectrics: From Space Power Systems to Terrestrial Waste Heat

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Recovery Applications | Department of Energy Thermoelectrics: From Space Power Systems to Terrestrial Waste Heat Recovery Applications Thermoelectrics: From Space Power Systems to Terrestrial Waste Heat Recovery Applications Progress in reliable high temperature segmented thermoelectric devices and potential for producing electricity from waste heat from energy intensive industrial processes and transportation vehicles exhaust are discussed PDF icon fluerial.pdf More Documents &

  10. Isotope powered Stirling generator for terrestrial applications

    SciTech Connect (OSTI)

    Tingey, G.L.; Sorensen, G.C.; Ross, B.A.

    1995-01-01

    An electric power supply, small enough to be man-portable, is being developed for remote, terrestrial applications. This system is designed for an operating lifetime of five years without maintenance or refueling. A small Radioisotope Stirling Generator (RSG) has been developed. The energy source of the generator is a 60 watt plutonium-238 fuel clad used in the General Purpose Heat Sources (GPHS) developed for space applications. A free piston Stirling Engine drives a linear alternator to convert the heat to power. The system weighs about 7.5 kg and produces 11 watts AC power with a conversion efficiency of 18.5%. Two engine models have been designed, fabricated, and tested to date: (a) a developmental model instrumented to confirm and test parameters, and (b) an electrically heated model with an electrical heater equipped power input leads. Critical components have been tested for 10,000 to 20,000 hours. One complete generator has been operating for over 11,000 hours. Radioisotope heated prototypes are expected to be fabricated and tested in late 1995.

  11. Tidal heating in multilayered terrestrial exoplanets

    SciTech Connect (OSTI)

    Henning, Wade G.; Hurford, Terry

    2014-07-01

    The internal pattern and overall magnitude of tidal heating for spin-synchronous terrestrial exoplanets from 1 to 2.5 R{sub E} is investigated using a propagator matrix method for a variety of layer structures. Particular attention is paid to ice-silicate hybrid super-Earths, where a significant ice mantle is modeled to rest atop an iron-silicate core, and may or may not contain a liquid water ocean. We find multilayer modeling often increases tidal dissipation relative to a homogeneous model, across multiple orbital periods, due to the ability to include smaller volume low viscosity regions, and the added flexure allowed by liquid layers. Gradations in parameters with depth are explored, such as allowed by the Preliminary Earth Reference Model. For ice-silicate hybrid worlds, dramatically greater dissipation is possible beyond the case of a silicate mantle only, allowing non-negligible tidal activity to extend to greater orbital periods than previously predicted. Surface patterns of tidal heating are found to potentially be useful for distinguishing internal structure. The influence of ice mantle depth and water ocean size and position are shown for a range of forcing frequencies. Rates of orbital circularization are found to be 10-100 times faster than standard predictions for Earth-analog planets when interiors are moderately warmer than the modern Earth, as well as for a diverse range of ice-silicate hybrid super-Earths. Circularization rates are shown to be significantly longer for planets with layers equivalent to an ocean-free modern Earth, as well as for planets with high fractions of either ice or silicate melting.

  12. T.G. Hinton: Radioactive Contaminants in Terrestrial Ecosystems...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Terrestrial Ecosystems Thomas G. Hinton Savannah River Ecology Laboratory P O Drawer E, Aiken, SC 29802 (803) 725-7454 office (803) 725-3309 fax thinton(at)uga.edu Dr. Hinton has...

  13. Plutonium Isotopes in the Terrestrial Environment at the Savannah...

    Office of Scientific and Technical Information (OSTI)

    Citation Details In-Document Search Title: Plutonium Isotopes in the Terrestrial Environment at the Savannah River Site, USA. A Long-Term Study This work presents the findings of a ...

  14. Terrestrial Climate Change and Ecosystem Response Recorded in Lake

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Sediments and Related Deposits Terrestrial Climate Change and Ecosystem Response Recorded in Lake Sediments and Related Deposits Reconstruction of past terrestrial climate and ecosystem response relies on archives that incorporate and preserve information about changes in temperature, precipitation, nutrients, vegetation, fire history, etc. The resolution and length of such paleoclimate/ecological records is dependent on the type of archive. Although much information is able to be determined

  15. Summaries of physical research in the geosciences

    SciTech Connect (OSTI)

    Not Available

    1983-09-01

    The Department of Energy supports research in the geosciences in order to provide a sound foundation of fundamental knowledge in those areas of earth, atmospheric, and solar-terrestrial sciences that are germane to the Department of Energy's many missions. The summaries in the document describe the scope of the individual programs and detail the research performed during 1982 to 1983. The Geoscience Research Program includes research in geology, petrology, geophysics, geochemistry, hydrology, solar-terrestrial relationships, aeronomy, seismology, and natural resource analysis, including the various subdivisions and interdisciplinary areas. All such research is related either directly or indirectly to the Department of Energy's technological needs.

  16. Summaries of physical research in the geosciences

    SciTech Connect (OSTI)

    Not Available

    1986-09-01

    The summaries in this document describe the scope of the individual programs and detail the research performed during 1984-1985. The Geosciences Research Program includes research in geology, petrology, geophysics, geochemistry, hydrology, solar-terrestrial relationships, aeronomy, seismology, and natural resource analysis, including their various subdivisions and interdisciplinary areas.

  17. Summaries of physical research in the geosciences

    SciTech Connect (OSTI)

    Not Available

    1981-10-01

    The Department of Energy supports research in the geosciences in order to provide a sound foundation of fundamental knowledge in those areas of earth, atmospheric, and solar-terrestrial sciences that are germane to the Department of Energy's many missions. The summaries describe the scope of the individual programs and detail the research performed during 1980 to 1981. The Geosciences Research Program includes research in geology, petrology, geophysics, geochemistry, hydrology, solar-terrestrial relationships, aeronomy, seismology, and natural resource analysis, including the various subdivisions and interdisciplinary areas.

  18. Controls on terrestrial carbon feedbacks by productivity vs. turnover in the CMIP5 Earth System Models

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Koven, C. D.; Chambers, J. Q.; Georgiou, K.; Knox, R.; Negron-Juarez, R.; Riley, W. J.; Arora, V. K.; Brovkin, V.; Friedlingstein, P.; Jones, C. D.

    2015-04-16

    To better understand sources of uncertainty in projections of terrestrial carbon cycle feedbacks, we present an approach to separate the controls on modeled carbon changes. We separate carbon changes into 4 categories using a linearized, equilibrium approach: those arising from changed inputs (productivity-driven changes), and outputs (turnover-driven changes), and apply the analysis separately to the live and dead carbon pools. Using Coupled Model Intercomparison Project Phase 5 (CMIP5) simulations for 5 models, we find that changes to the live pools are primarily explained by productivity-driven changes, with only one model showing large compensating changes to live carbon turnover times. Formore » dead carbon pools, the situation is more complex as all models predict a large reduction in turnover times in response to increases in productivity. This responses arises from the common representation of a broad spectrum of decomposition turnover times via a multi-pool approach, in which flux-weighted turnover times are faster than mass-weighted turnover times. This leads to a shift in the distribution of carbon among dead pools in response to changes in inputs, and therefore a transient but long-lived reduction in turnover times in response to increases in productivity. Since this behavior, a reduction in inferred turnover times resulting from an increase in inputs, is superficially similar to priming processes, but occurring without the mechanisms responsible for priming, we call the phenomenon "false priming", and show that it masks much of the intrinsic changes to dead carbon turnover times as a result of changing climate. These patterns hold across the fully-coupled, biogeochemically-coupled, and radiatively-coupled 1% yr−1 increasing CO2 experiments. We disaggregate inter-model uncertainty in the globally-integrated equilibrium carbon responses to initial turnover times, inital productivity, fractional changes in turnover, and fractional changes in productivity. For both the live and dead carbon pools, inter-model spread in carbon changes arising from initial conditions is dominated by model disagreement on turnover times, whereas inter-model spread in carbon changes from fractional changes to these terms is dominated by model disagreement on changes to productivity in response to both warming and CO2 fertilization. However, the lack of changing turnover time control on carbon responses, for both live and dead carbon pools, in response to the imposed forcings may indicate a common lack of process representation behind changing turnover times (e.g., allocation and mortality for live carbon; permafrost, microbial dynamics, and mineral stabilization for dead carbon), rather than a true estimate of the uncertainty in these processes.« less

  19. Controls on terrestrial carbon feedbacks by productivity versus turnover in the CMIP5 Earth System Models

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Koven, C. D.; Chambers, J. Q.; Georgiou, K.; Knox, R.; Negron-Juarez, R.; Riley, W. J.; Arora, V. K.; Brovkin, V.; Friedlingstein, P.; Jones, C. D.

    2015-09-07

    To better understand sources of uncertainty in projections of terrestrial carbon cycle feedbacks, we present an approach to separate the controls on modeled carbon changes. We separate carbon changes into four categories using a linearized, equilibrium approach: those arising from changed inputs (productivity-driven changes), and outputs (turnover-driven changes), of both the live and dead carbon pools. Using Coupled Model Intercomparison Project Phase 5 (CMIP5) simulations for five models, we find that changes to the live pools are primarily explained by productivity-driven changes, with only one model showing large compensating changes to live carbon turnover times. For dead carbon pools, themore » situation is more complex as all models predict a large reduction in turnover times in response to increases in productivity. This response arises from the common representation of a broad spectrum of decomposition turnover times via a multi-pool approach, in which flux-weighted turnover times are faster than mass-weighted turnover times. This leads to a shift in the distribution of carbon among dead pools in response to changes in inputs, and therefore a transient but long-lived reduction in turnover times. Since this behavior, a reduction in inferred turnover times resulting from an increase in inputs, is superficially similar to priming processes, but occurring without the mechanisms responsible for priming, we call the phenomenon "false priming", and show that it masks much of the intrinsic changes to dead carbon turnover times as a result of changing climate. These patterns hold across the fully coupled, biogeochemically coupled, and radiatively coupled 1 % yr−1 increasing CO2 experiments. We disaggregate inter-model uncertainty in the globally integrated equilibrium carbon responses to initial turnover times, initial productivity, fractional changes in turnover, and fractional changes in productivity. For both the live and dead carbon pools, inter-model spread in carbon changes arising from initial conditions is dominated by model disagreement on turnover times, whereas inter-model spread in carbon changes from fractional changes to these terms is dominated by model disagreement on changes to productivity in response to both warming and CO2 fertilization. However, the lack of changing turnover time control on carbon responses, for both live and dead carbon pools, in response to the imposed forcings may arise from a common lack of process representation behind changing turnover times (e.g., allocation and mortality for live carbon; permafrost, microbial dynamics, and mineral stabilization for dead carbon), rather than a true estimate of the importance of these processes.« less

  20. Research | Savannah River Ecology Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Research Gene Odum forest sampling marked tortoise geochemical sampling quantifying radionuclide absorption collcting microbes microsatellite development R E S E A R C H A R E A S * Aquatic and terrestrial ecology * Biogeochemistry & soil science * Environmental microbiology * Herpetology * Hydrology * Molecular genetics * Physiological ecology * Conservation biology * Radiation ecology * Ecotoxicology and risk assessment * Remediation and restoration SREL scientists pursue a wide variety of

  1. MCNP6 Cosmic & Terrestrial Background Particle Fluxes -- Release 4

    SciTech Connect (OSTI)

    McMath, Garrett E.; McKinney, Gregg W.; Wilcox, Trevor

    2015-01-23

    Essentially a set of slides, the presentation begins with the MCNP6 cosmic-source option, then continues with the MCNP6 transport model (atmospheric, terrestrial) and elevation scaling. It concludes with a few slides on results, conclusions, and suggestions for future work.

  2. Terrestrial Heat Flow In The North Island Of New Zealand | Open...

    Open Energy Info (EERE)

    Terrestrial Heat Flow In The North Island Of New Zealand Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: Terrestrial Heat Flow In The North...

  3. Baseline measurements of terrestrial gamma radioactivity at the CEBAF site

    SciTech Connect (OSTI)

    Wollenberg, H.A.; Smith, A.R.

    1991-10-01

    A survey of the gamma radiation background from terrestrial sources was conducted at the CEBAF site, Newport News, Virginia, on November 12--16, 1990, to provide a gamma radiation baseline for the site prior to the startup of the accelerator. The concentrations and distributions of the natural radioelements in exposed soil were measured, and the results of the measurements were converted into gamma-ray exposure rates. Concurrently, samples were collected for laboratory gamma spectral analyses.

  4. ARM Climate Research Facility Annual Report 2005

    SciTech Connect (OSTI)

    J. Voyles

    2005-12-31

    Through the ARM Program, the DOE funded the development of several highly instrumented ground stations for studying cloud formation processes and their influence on radiative transfer, and for measuring other parameters that determine the radiative properties of the atmosphere. This scientific infrastructure, and resultant data archive, is a valuable national and international asset for advancing scientific knowledge of Earth systems. In fiscal year (FY) 2003, the DOE designated ARM sites as a national scientific user facility: the ARM Climate Research (ACRF). The ACRF has enormous potential to contribute to a wide range interdisciplinary science in areas such as meteorology, atmospheric aerosols, hydrology, biogeochemical cycling, and satellite validation, to name only a few.

  5. Research Techniques

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Research Techniques Research Techniques Print Coming Soon

  6. Pacific Northwest Laboratory annual report for 1984 to the DOE Office of Energy Research. Part 2. Ecological sciences

    SciTech Connect (OSTI)

    Novich, C.M.

    1985-02-01

    Research progress is reported in the following areas: (1) the terrestrial ecology of semi-arid sites; (2) marine sciences; (3) radionuclide fate and effects; (4) waste mobilization, fate and effects; and (5) theoretical research on environmental sampling. (ACR)

  7. Multi-level effects of low dose rate ionizing radiation on southern toad, Anaxyrus [Bufo] terrestris

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Stark, Karolina; Scott, David E.; Tsyusko, Olga; Coughlin, Daniel P.; Hinton, Thomas G.; Amendola, Roberto

    2015-04-30

    Despite their potential vulnerability to contaminants from exposure at multiple life stages, amphibians are one of the least studied groups of vertebrates in ecotoxicology, and research on radiation effects in amphibians is scarce. We used multiple endpoints to assess the radiosensitivity of the southern toad (Anaxyrus [Bufo] terrestris) during its pre-terrestrial stages of development –embryonic, larval, and metamorphic. Toads were exposed, from several hours after oviposition through metamorphosis (up to 77 days later), to four low dose rates of ¹³⁷Cs at 0.13, 2.4, 21, and 222 mGy d⁻¹, resulting in total doses up to 15.8 Gy. Radiation treatments did notmore » affect hatching success of embryos, larval survival, or the length of the larval period. The individual family variation in hatching success of embryos was larger than the radiation response. In contrast, newly metamorphosed individuals from the higher dose-rate treatments had higher mass and mass/length body indices, a measure which may relate to higher post-metamorphic survival. The increased mass and index at higher dose rates may indicate that the chronic, low dose rate radiation exposures triggered secondary responses. Additionally, the increases in growth were linked to a decrease in DNA damage (as measured by the Comet Assay) in red blood cells at a dose rate of 21mGy d⁻¹ and a total dose of 1.1 Gy. In conclusion, the complex effects of low dose rates of ionizing radiation may trigger growth and cellular repair mechanisms in amphibian larvae.« less

  8. Summaries of physical research in the geosciences

    SciTech Connect (OSTI)

    Not Available

    1980-08-01

    The Department of Energy supports research in the geosciences in order to provide a sound underlay of fundamental knowledge in those areas of the earth, atmospheric, and solar/terrestrial sciences that relate to the Department of Energy's many missions. The Division of Engineering, Mathematical and Geosciences, which is a part of the Office of Basic Energy Sciences and comes under the Director of Energy Research, supports under its Geosciences program major Department of Energy laboratories, industry, universities and other governmental agencies. The summaries in this document, prepared by the investigators, describe the overall scope of the individual programs and details of the research performed during 1979-1980. The Geoscience program includes research in geology, petrology, geophysics, geochemistry, hydrology, solar-terrestrial relationships, aeronomy, seismology and natural resource analysis, including the various subdivisions and interdisciplinary areas. All such research is related to the Department's technological needs, either directly or indirectly.

  9. System, method, and apparatus for remote measurement of terrestrial biomass

    DOE Patents [OSTI]

    Johnson, Patrick W (Jefferson, MD)

    2011-04-12

    A system, method, and/or apparatus for remote measurement of terrestrial biomass contained in vegetative elements, such as large tree boles or trunks present in an area of interest, are provided. The method includes providing an airborne VHF radar system in combination with a LiDAR system, overflying the area of interest while directing energy toward the area of interest, using the VHF radar system to collect backscatter data from the trees as a function of incidence angle and frequency, and determining a magnitude of the biomass from the backscatter data and data from the laser radar system for each radar resolution cell. A biomass map is generated showing the magnitude of the biomass of the vegetative elements as a function of location on the map by using each resolution cell as a unique location thereon. In certain preferred embodiments, a single frequency is used with a linear array antenna.

  10. Management Opportunities for Enhancing Terrestrial Carbon Dioxide Sinks

    SciTech Connect (OSTI)

    Post, W. M.; Izaurralde, Roberto C.; West, Tristram O.; Liebig, Mark A.; King, Anthony W.

    2012-12-01

    The potential for mitigating increasing atmospheric carbon dioxide concentrations through the use of terrestrial biological carbon (C) sequestration is substantial. Here, we estimate the amount of C being sequestered by natural processes at global, North American, and national US scales. We present and quantify, where possible, the potential for deliberate human actions through forestry, agriculture, and use of biomass-based fuels to augment these natural sinks. Carbon sequestration may potentially be achieved through some of these activities but at the expense of substantial changes in land-use management. Some practices (eg reduced tillage, improved silviculture, woody bioenergy crops) are already being implemented because of their economic benefits and associated ecosystem services. Given their cumulative greenhouse-gas impacts, other strategies (eg the use of biochar and cellulosic bioenergy crops) require further evaluation to determine whether widespread implementation is warranted.

  11. 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

    SciTech Connect (OSTI)

    Stephen C. Piper

    2005-10-15

    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.

  12. Final Progress Report: Coupled Biogeochemical Process Evaluation for Conceptualizing Trichloroethylene Cometabolism

    SciTech Connect (OSTI)

    Crawford, Ronald L; Paszczynski, Andrzej J

    2010-02-19

    Our goal within the overall project is to demonstrate the presence and abundance of methane monooxygenases (MMOs) enzymes and their genes within the microbial community of the Idaho National Laboratory (INL) Test Area North (TAN) site. MMOs are thought to be the primary catalysts of natural attenuation of trichloroethylene (TCE) in contaminated groundwater at this location. The actual presence of the proteins making up MMO complexes would provide direct evidence for its participation in TCE degradation. The quantitative estimation of MMO genes and their translation products (sMMO and pMMO proteins) and the knowledge about kinetics and substrate specificity of MMOs will be used to develop mathematical models of the natural attenuation process in the TAN aquifer. The model will be particularly useful in prediction of TCE degradation rate in TAN and possibly in the other DOE sites. Bacteria known as methanotrophs produce a set of proteins that assemble to form methane monooxygenase complexes (MMOs), enzymes that oxidize methane as their natural substrate, thereby providing a carbon and energy source for the organisms. MMOs are also capable of co-metabolically transforming chlorinated solvents like TCE into nontoxic end products such as carbon dioxide and chloride. There are two known forms of methane monooxygenase, a membrane-bound particulate form (pMMO) and a cytoplasmic soluble form (sMMO). pMMO consists of two components, pMMOH (a hydroxylase comprised of 47-, 27-, and 24-kDa subunits) and pMMOR (a reductase comprised of 63 and 8-kDa subunits). sMMO consists of three components: a hydroxylase (protein A-250 kDa), a dimer of three subunits (?2?2?2), a regulatory protein (protein B-15.8 kDa), and a reductase (protein C-38.6 kDa). All methanotrophs will produce a methanol dehydrogenase to channel the product of methane oxidation (methanol) into the central metabolite formaldehyde. University of Idaho (UI) efforts focused on proteomic analyses using mass spectrometry and genomic analyses using RT-PCR to characterize these enzyme systems. UIs specific objectives were to develop the proteomics and genomic tools to assess the presence of the methane monooxygenase (MMO) proteins in the aquifers under study and relate this to the enumeration of methanotrophic microorganisms. We targeted the identification of both sMMO and pMMO. We believe that the copper level in the TAN aquifer is most likely suppressing the expression of sMMO and mediates the higher levels of pMMO expression. Hence our investigations included the identification of both forms of MMOs, and we expected a higher concentration of pMMO proteins in TAN samples. The amounts of these proteins present were correlated with numbers of methanotrophs determined by us and other members of the research team using PCR-based methods. In summary, to accomplish our objectives we applied environmental proteomics techniques to monitor proteins that are involved in the co-metabolic degradation of trichloroethylene (TCE) in groundwater of the INL TAN site on Department of Energy ands of near Idaho Falls, ID USA. To acquire peptides sequences information we used an ultra performance chromatography (UPLC) system coupled with QToF Premiere nano-electrospray tandem quadropole-time of flight mass spectrometer. Our goal was to identify signature peptides of methane monooxygenases (MMOs) within methanotrophic bacteria that are active in cometabolic degradation of TCE. We developed a new method for extracting total proteins from environmental planktonic and/or biofilm samples that involve a new time course cell lysis and protein extraction method in combination with chromatographic separation of peptide and tandem mass spectrometry sequencing. The techniques resulted in successful extraction and identification of MMO-based peptides from both pure cultures and TAN site samples. The work confirmed the importance of mathonotrophs in the co-metabolic removal of TCE from the TAN site aquifer.

  13. Biologically Enhanced Carbon Sequestration: Research Needs and Opportunities

    SciTech Connect (OSTI)

    Oldenburg, Curtis; Oldenburg, Curtis M.; Torn, Margaret S.

    2008-03-21

    Fossil fuel combustion, deforestation, and biomass burning are the dominant contributors to increasing atmospheric carbon dioxide (CO{sub 2}) concentrations and global warming. Many approaches to mitigating CO{sub 2} emissions are being pursued, and among the most promising are terrestrial and geologic carbon sequestration. Recent advances in ecology and microbial biology offer promising new possibilities for enhancing terrestrial and geologic carbon sequestration. A workshop was held October 29, 2007, at Lawrence Berkeley National Laboratory (LBNL) on Biologically Enhanced Carbon Sequestration (BECS). The workshop participants (approximately 30 scientists from California, Illinois, Oregon, Montana, and New Mexico) developed a prioritized list of research needed to make progress in the development of biological enhancements to improve terrestrial and geologic carbon sequestration. The workshop participants also identified a number of areas of supporting science that are critical to making progress in the fundamental research areas. The purpose of this position paper is to summarize and elaborate upon the findings of the workshop. The paper considers terrestrial and geologic carbon sequestration separately. First, we present a summary in outline form of the research roadmaps for terrestrial and geologic BECS. This outline is elaborated upon in the narrative sections that follow. The narrative sections start with the focused research priorities in each area followed by critical supporting science for biological enhancements as prioritized during the workshop. Finally, Table 1 summarizes the potential significance or 'materiality' of advances in these areas for reducing net greenhouse gas emissions.

  14. Adaptation policies to increase terrestrial ecosystem resilience: potential utility of a multicriteria approach

    SciTech Connect (OSTI)

    de Bremond, Ariane; Engle, Nathan L.

    2014-03-01

    Climate change is rapidly undermining terrestrial ecosystem resilience and capacity to continue providing their services to the benefit of humanity and nature. Because of the importance of terrestrial ecosystems to human well-being and supporting services, decision makers throughout the world are busy creating policy responses that secure multiple development and conservation objectives- including that of supporting terrestrial ecosystem resilience in the context of climate change. This article aims to advance analyses on climate policy evaluation and planning in the area of terrestrial ecosystem resilience by discussing adaptation policy options within the ecology-economy-social nexus. The paper evaluates these decisions in the realm of terrestrial ecosystem resilience and evaluates the utility of a set of criteria, indicators, and assessment methods, proposed by a new conceptual multi-criteria framework for pro-development climate policy and planning developed by the United Nations Environment Programme. Potential applications of a multicriteria approach to climate policy vis-A -vis terrestrial ecosystems are then explored through two hypothetical case study examples. The paper closes with a brief discussion of the utility of the multi-criteria approach in the context of other climate policy evaluation approaches, considers lessons learned as a result efforts to evaluate climate policy in the realm of terrestrial ecosystems, and reiterates the role of ecosystem resilience in creating sound policies and actions that support the integration of climate change and development goals.

  15. USING ANT COMMUNITIES FOR RAPID ASSESSMENT OF TERRESTRIAL ECOSYSTEM HEALTH

    SciTech Connect (OSTI)

    Wike, L; Doug Martin, D; Michael Paller, M; Eric Nelson, E

    2007-01-12

    Ecosystem health with its near infinite number of variables is difficult to measure, and there are many opinions as to which variables are most important, most easily measured, and most robust, Bioassessment avoids the controversy of choosing which physical and chemical parameters to measure because it uses responses of a community of organisms that integrate all aspects of the system in question. A variety of bioassessment methods have been successfully applied to aquatic ecosystems using fish and macroinvertebrate communities. Terrestrial biotic index methods are less developed than those for aquatic systems and we are seeking to address this problem here. This study had as its objective to examine the baseline differences in ant communities at different seral stages from clear cut back to mature pine plantation as a precursor to developing a bioassessment protocol. Comparative sampling was conducted at four seral stages; clearcut, 5 year, 15 year and mature pine plantation stands. Soil and vegetation data were collected at each site. All ants collected were preserved in 70% ethyl alcohol and identified to genus. Analysis of the ant data indicates that ants respond strongly to the habitat changes that accompany ecological succession in managed pine forests and that individual genera as well as ant community structure can be used as an indicator of successional change. Ants exhibited relatively high diversity in both early and mature seral stages. High ant diversity in the mature seral stages was likely related to conditions on the forest floor which favored litter dwelling and cool climate specialists.

  16. Progress Report for the grant "Hight-Resolution Mineralogical Charaterization and Biogeochemical Modeling of Uranium Reduction Pathways at the NABIR Field-Research Center"

    SciTech Connect (OSTI)

    Veblen, David R.

    2006-06-15

    We have successfully completed a proof-of-concept, one-year grant on a three-year proposal from the former NABIR program. Using a state-of-the-art 300-kV, atomic resolution, Field Emission Gun Transmission Electron Microscope (TEM), we have successfully identified three categories of mineral hosts for uranium in contaminated soils from the Oak Ridge FRC: (1) iron oxides: (2) mixed manganese-iron oxides; and (3) uranium phosphates.

  17. Mercury contamination of terrestrial vegetation near a caustic soda factory in Thailand

    SciTech Connect (OSTI)

    Suckcharoen, S.

    1980-03-01

    The present study is concerned with the fall-out of mercury on some terrestrial plants and one species of aquatic plant growing in the vicinity of the TACSCO factory.

  18. Summaries of physical research in the geosciences

    SciTech Connect (OSTI)

    Not Available

    1987-09-01

    The Department of Energy supports research in the geosciences in order to provide a sound foundation of fundamental knowledge in those areas that are germane to the Department of Energy's many missions. The summaries in this document, prepared by the investigators, describe the scope of the individual programs. The Geoscience Research Program includes research in geology, petrology, geophysics, geochemistry, solar-terrestrial relationships, aeronomy, seismology, and natural resource analysis, including their various subdivisions and interdisciplinary areas. All such research is related either directly or indirectly to the Department of Energy's technological needs.

  19. Excess /sup 129/Xe in terrestrial samples: A non-primordial hypothesis

    SciTech Connect (OSTI)

    Caffee, M.W.; Hudson, G.B.

    1987-03-01

    Excesses of /sup 129/Xe relative to the isotopic composition in air are observed in some terrestrial samples. Traditionally these /sup 129/Xe excesses have been thought to be related to /sup 129/I that was present in abundance in the early solar system. We propose an alternative hypothesis to explain terrestrial /sup 129/Xe excesses based on the production of /sup 129/I from the spontaneous fission of /sup 238/U.

  20. Reaction-based Transport Modeling of Iron Reduction and Uranium Immobilization at Area 2 of the NABIR Field Research Center

    SciTech Connect (OSTI)

    Tsyh Yeh, Gour

    2007-12-21

    This research sought to examine biogeochemical processes likely to take place in the less conductive materials above and below the gravel during the in situ ethanol biostimulation experiment conducted at Area 2 during 2005-2006. The in situ experiment in turn examined the hypothesis that injection of electron donor into this layer would induce formation of a redox barrier in the less conductive materials, resulting in decreased mass transfer of uranium out these materials and attendant declines in groundwater U(VI) concentration. Our project focuses on the development of a mechanistic understanding and quantitative models of coupled Fe(III)/U(VI) reduction in FRC Area 2 sediments. This report summarizes research activities conducted at The University of Central Florida (2004-2007), the development of biogeochemical and reactive transport models and the conduction of numerical simulations at laboratory, column, and field scales.

  1. Transportation Research

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    transportation-research TRACC RESEARCH Computational Fluid Dynamics Computational Structural Mechanics Transportation Systems Modeling Transportation Research Current Research Overview The U.S. Department of Transportation (USDOT) has established its only high-performance computing and engineering analysis research facility at Argonne National Laboratory to provide applications support in key areas of applied research and development for the USDOT community. The Transportation Research and

  2. Multi-level effects of low dose rate ionizing radiation on southern toad, Anaxyrus [Bufo] terrestris

    SciTech Connect (OSTI)

    Stark, Karolina; Scott, David E.; Tsyusko, Olga; Coughlin, Daniel P.; Hinton, Thomas G.; Amendola, Roberto

    2015-04-30

    Despite their potential vulnerability to contaminants from exposure at multiple life stages, amphibians are one of the least studied groups of vertebrates in ecotoxicology, and research on radiation effects in amphibians is scarce. We used multiple endpoints to assess the radiosensitivity of the southern toad (Anaxyrus [Bufo] terrestris) during its pre-terrestrial stages of development embryonic, larval, and metamorphic. Toads were exposed, from several hours after oviposition through metamorphosis (up to 77 days later), to four low dose rates of ?Cs at 0.13, 2.4, 21, and 222 mGy d?, resulting in total doses up to 15.8 Gy. Radiation treatments did not affect hatching success of embryos, larval survival, or the length of the larval period. The individual family variation in hatching success of embryos was larger than the radiation response. In contrast, newly metamorphosed individuals from the higher dose-rate treatments had higher mass and mass/length body indices, a measure which may relate to higher post-metamorphic survival. The increased mass and index at higher dose rates may indicate that the chronic, low dose rate radiation exposures triggered secondary responses. Additionally, the increases in growth were linked to a decrease in DNA damage (as measured by the Comet Assay) in red blood cells at a dose rate of 21mGy d? and a total dose of 1.1 Gy. In conclusion, the complex effects of low dose rates of ionizing radiation may trigger growth and cellular repair mechanisms in amphibian larvae.

  3. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Submitter: Area of Research: Journal Reference: N/A

  4. Summaries of FY 1993 geosciences research

    SciTech Connect (OSTI)

    Not Available

    1993-12-01

    The Department of Energy supports research in the geosciences in order to provide a sound foundation of fundamental knowledge in those areas of the geosciences that are germane to the DOE`s many missions. The Geosciences Research Program is supported by the Office of Energy Research. The participants in this program include DOE laboratories, academic institutions, and other governmental agencies. These activities are formalized by a contract or grant between the DOE and the organization performing the work, providing funds for salaries, equipment, research materials, and overhead. The summaries in this document, prepared by the investigators, describe the scope of the individual programs. The Geosciences Research Program includes research in geophysics, geochemistry, resource evaluation, solar-terrestrial interactions, and their subdivisions including earth dynamics, properties of earth materials, rock mechanics, underground imaging, rock-fluid interactions, continental scientific drilling, geochemical transport, solar-atmospheric physics, and modeling, with emphasis on the interdisciplinary areas.

  5. Summaries of physical research in the geosciences

    SciTech Connect (OSTI)

    Not Available

    1990-10-01

    The Department of Energy supports research in the geosciences in order to provide a sound foundation of fundamental knowledge in those areas of the geosciences which are germane to the Department of Energy's many missions. The Division of Engineering and Geosciences, part of the Office of Basic Energy Sciences of the Office of Energy Research, supports the Geosciences Research Program. The participants in this program include Department of Energy laboratories, industry, universities, and other governmental agencies. The summaries in this document, prepared by the investigators, briefly describe the scope of the individual programs. The Geosciences Research Program includes research in geology, petrology, geophysics, geochemistry, solar physics, solar-terrestrial relationships, aeronomy, seismology, and natural resource modeling and analysis, including their various subdivisions and interdisciplinary areas. All such research is related either directly or indirectly to the Department of Energy's long-range technological needs.

  6. Research Gallery

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Research Gallery Research Gallery Exhibits in this gallery capture Laboratory's leading-edge research in many areas of science and technology to help solve national problems related to energy, the environment, infrastructure, and health. August 18, 2014 Museum floor plan showing the Research Gallery Basic research conducted here enhances our national defense and global security missions. Science serving society The Laboratory conducts leading-edge research in many areas of science and technology

  7. Research Highlights

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Highlights Form Submit a New Research Highlight Sort Highlights Submitter Title Research Area Working Group Submission Date DOE Progress Reports Notable Research Findings for 2001-2006 Office of Science Abstracts Database Research Highlights Summaries Research Highlights Members of ARM's science team are major contributors to radiation and cloud research. ARM investigators publish about 150 refereed journal articles per year, and ARM data are used in many studies published by other scientific

  8. Research Projects

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Current Research Projects Joint Los Alamos National LaboratoryUCSD Research Projects Collaborations between Los Alamos National Laboratory and the University of California at San...

  9. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Chinese Researchers Report Reliable Method for Monitoring Soil Moisture Submitter: Bhattacharya, A., Pacific Northwest National Laboratory Area of Research: Surface Properties...

  10. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Testing and Comparing the Modified Anomalous Diffraction Approximation Submitter: Mitchell, D. L., Desert Research Institute Area of Research: Cloud DistributionsCharacterizations...

  11. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ARM Program Research Improves Longwave Radiative Transfer Models Submitter: Turner, D. D., National Oceanic and Atmospheric Administration Area of Research: General Circulation and...

  12. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Fog and Rain in the Amazon For original submission and image(s), see ARM Research Highlights http:www.arm.govsciencehighlights Research Highlight The diurnal and seasonal...

  13. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Research Masters the Misunderstood Mixed-Phase Cloud Download a printable PDF Submitter: Ovchinnikov, M., Pacific Northwest National Laboratory Area of Research:...

  14. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Improved Daytime Precipitable Water Vapor from Vaisala Radiosonde Humidity Sensors Download a printable PDF Submitter: Cady-Pereira, K. E., Atmospheric and Environmental Research, Inc. Mlawer, E. J., Atmospheric & Environmental Research, Inc. Turner, D. D., National Oceanic and Atmospheric Administration Shephard, M. W., Atmospheric and Environmental Research, Inc. Clough, S. A., Atmospheric and Environmental Research, Inc. Area of Research: Atmospheric Thermodynamics and Vertical Structures

  15. Global patterns and controls of soil organic carbon dynamics as simulated by multiple terrestrial biosphere models: Current status and future directions

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Tian, Hanqin; Lu, Chaoqun; Yang, Jia; Banger, Kamaljit; Huntzinger, Deborah N.; Schwalm, Christopher R.; Michalak, Anna M.; Cook, Robert; Ciais, Philippe; Hayes, Daniel; et al

    2015-06-05

    Soil is the largest organic carbon (C) pool of terrestrial ecosystems, and C loss from soil accounts for a large proportion of land-atmosphere C exchange. Therefore, a small change in soil organic C (SOC) can affect atmospheric carbon dioxide (CO₂) concentration and climate change. In the past decades, a wide variety of studies have been conducted to quantify global SOC stocks and soil C exchange with the atmosphere through site measurements, inventories, and empirical/process-based modeling. However, these estimates are highly uncertain, and identifying major driving forces controlling soil C dynamics remains a key research challenge. This study has compiled century-longmore » (1901–2010) estimates of SOC storage and heterotrophic respiration (Rh) from 10 terrestrial biosphere models (TBMs) in the Multi-scale Synthesis and Terrestrial Model Intercomparison Project and two observation-based data sets. The 10 TBM ensemble shows that global SOC estimate ranges from 425 to 2111 Pg C (1 Pg = 10¹⁵ g) with a median value of 1158 Pg C in 2010. The models estimate a broad range of Rh from 35 to 69 Pg C yr⁻¹ with a median value of 51 Pg C yr⁻¹ during 2001–2010. The largest uncertainty in SOC stocks exists in the 40–65°N latitude whereas the largest cross-model divergence in Rh are in the tropics. The modeled SOC change during 1901–2010 ranges from –70 Pg C to 86 Pg C, but in some models the SOC change has a different sign from the change of total C stock, implying very different contribution of vegetation and soil pools in determining the terrestrial C budget among models. The model ensemble-estimated mean residence time of SOC shows a reduction of 3.4 years over the past century, which accelerate C cycling through the land biosphere. All the models agreed that climate and land use changes decreased SOC stocks, while elevated atmospheric CO₂ and nitrogen deposition over intact ecosystems increased SOC stocks—even though the responses varied significantly among models. Model representations of temperature and moisture sensitivity, nutrient limitation, and land use partially explain the divergent estimates of global SOC stocks and soil C fluxes in this study. In addition, a major source of systematic error in model estimations relates to nonmodeled SOC storage in wetlands and peatlands, as well as to old C storage in deep soil layers.« less

  16. Global patterns and controls of soil organic carbon dynamics as simulated by multiple terrestrial biosphere models: Current status and future directions

    SciTech Connect (OSTI)

    Tian, Hanqin; Lu, Chaoqun; Yang, Jia; Banger, Kamaljit; Huntzinger, Deborah N.; Schwalm, Christopher R.; Michalak, Anna M.; Cook, Robert; Ciais, Philippe; Hayes, Daniel; Huang, Maoyi; Ito, Akihiko; Jain, Atul K.; Lei, Huimin; Mao, Jiafu; Pan, Shufen; Post, Wilfred M.; Peng, Shushi; Poulter, Benjamin; Ren, Wei; Ricciuto, Daniel; Schaefer, Kevin; Shi, Xiaoying; Tao, Bo; Wang, Weile; Wei, Yaxing; Yang, Qichun; Zhang, Bowen; Zeng, Ning

    2015-06-05

    Soil is the largest organic carbon (C) pool of terrestrial ecosystems, and C loss from soil accounts for a large proportion of land-atmosphere C exchange. Therefore, a small change in soil organic C (SOC) can affect atmospheric carbon dioxide (CO?) concentration and climate change. In the past decades, a wide variety of studies have been conducted to quantify global SOC stocks and soil C exchange with the atmosphere through site measurements, inventories, and empirical/process-based modeling. However, these estimates are highly uncertain, and identifying major driving forces controlling soil C dynamics remains a key research challenge. This study has compiled century-long (19012010) estimates of SOC storage and heterotrophic respiration (Rh) from 10 terrestrial biosphere models (TBMs) in the Multi-scale Synthesis and Terrestrial Model Intercomparison Project and two observation-based data sets. The 10 TBM ensemble shows that global SOC estimate ranges from 425 to 2111 Pg C (1 Pg = 10? g) with a median value of 1158 Pg C in 2010. The models estimate a broad range of Rh from 35 to 69 Pg C yr? with a median value of 51 Pg C yr? during 20012010. The largest uncertainty in SOC stocks exists in the 4065N latitude whereas the largest cross-model divergence in Rh are in the tropics. The modeled SOC change during 19012010 ranges from 70 Pg C to 86 Pg C, but in some models the SOC change has a different sign from the change of total C stock, implying very different contribution of vegetation and soil pools in determining the terrestrial C budget among models. The model ensemble-estimated mean residence time of SOC shows a reduction of 3.4 years over the past century, which accelerate C cycling through the land biosphere. All the models agreed that climate and land use changes decreased SOC stocks, while elevated atmospheric CO? and nitrogen deposition over intact ecosystems increased SOC stockseven though the responses varied significantly among models. Model representations of temperature and moisture sensitivity, nutrient limitation, and land use partially explain the divergent estimates of global SOC stocks and soil C fluxes in this study. In addition, a major source of systematic error in model estimations relates to nonmodeled SOC storage in wetlands and peatlands, as well as to old C storage in deep soil layers.

  17. Study of the Role of Terrestrial Processes in the Carbon Cycle Based on Measurements of the Abundance and Isotopic Composition of Atmospheric CO2

    SciTech Connect (OSTI)

    Piper, Stephen C; Keeling, Ralph F

    2012-01-03

    The main objective of this project was to continue research to develop carbon cycle relationships related to the land biosphere based on remote measurements of atmospheric CO2 concentration and its isotopic ratios 13C/12C, 18O/16O, and 14C/12C. The project continued time-series observations of atmospheric carbon dioxide and isotopic composition begun by Charles D. Keeling at remote sites, including Mauna Loa, the South Pole, and eight other sites. Using models of varying complexity, the concentration and isotopic measurements were used to study long-term change in the interhemispheric gradients in CO2 and 13C/12C to assess the magnitude and evolution of the northern terrestrial carbon sink, to study the increase in amplitude of the seasonal cycle of CO2, to use isotopic data to refine constraints on large scale changes in isotopic fractionation which may be related to changes in stomatal conductance, and to motivate improvements in terrestrial carbon cycle models. The original proposal called for a continuation of the new time series of 14C measurements but subsequent descoping to meet budgetary constraints required termination of measurements in 2007.

  18. Single-junction solar cells with the optimum band gap for terrestrial concentrator applications

    DOE Patents [OSTI]

    Wanlass, Mark W. (Golden, CO)

    1994-01-01

    A single-junction solar cell having the ideal band gap for terrestrial concentrator applications. Computer modeling studies of single-junction solar cells have shown that the presence of absorption bands in the direct spectrum has the effect of "pinning" the optimum band gap for a wide range of operating conditions at a value of 1.14.+-.0.02 eV. Efficiencies exceeding 30% may be possible at high concentration ratios for devices with the ideal band gap.

  19. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    SPartICus Submitter: Mishra, S., DOE - SunShot Initiative, AAAS S&T Policy Fellow Mitchell, D. L., Desert Research Institute Area of Research: General Circulation and Single...

  20. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Environmental Thermodynamics Affect Radiative Impact of Deep Convective Cloud Systems Submitter: Jensen, M., Brookhaven National Laboratory Area of Research: Atmospheric...

  1. Research Projects

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    LaboratoryNational Security Education Center Menu NSEC Educational Programs Los Alamos Dynamics Summer School Science of Signatures Advanced Studies Institute Judicial Science School SHM Data Sets and Software Research Projects Current Projects Past Projects Publications NSEC » Engineering Institute » Research Projects » Joint Los Alamos National Laboratory/UCSD research projects Past Research Projects Previous collaborations between Los Alamos National Laboratory and the University of

  2. Current Research

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Current Research The U.S. Department of Transportation (USDOT) has established its only high-performance computing and engineering analysis research facility at Argonne National Laboratory to provide applications support in key areas of applied research and development for the USDOT community. The Transportation Research and Analysis Computing Center (TRACC) features a state-of-the-art massively parallel computer system, advanced scientific visualization capability, high-speed network

  3. Research Library

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    LANL Research Library: delivering essential knowledge services for national security sciences since 1947 About the Research Library Mission We deliver agile, responsive knowledge services, connecting people with information, technology and resources. Vision Essential knowledge services for national security sciences. The Research Library provides extensive collections of books, journals, databases, patents and technical reports and offers literature searching, training and outreach services. The

  4. Pacific Northwest Laboratory annual report for 1993 to the DOE Office of Energy Research. Part 2: Environmental sciences

    SciTech Connect (OSTI)

    Not Available

    1994-04-01

    This 1993 Annual Report from Pacific Northwest Laboratory (PNL) to the US DOE describes research in environment and health conducted during fiscal year (FY) 1993. The report is divided into four parts, each in a separate volume. This part, Volume 2, covers Environmental Sciences. The research is directed toward developing a fundamental understanding of subsurface and terrestrial systems as a basis for both managing these critical resources and addressing environmental problems such as environmental restoration and global change. There are sections on Subsurface Science, Terrestrial Science, Technology Transfer, Interactions with Educational Institutions, and Laboratory Directed Research and Development.

  5. DOE Regional Partnership Successfully Demonstrates Terrestrial CO2 Storage Practices in Great Plains Region of U.S. and Canada

    Broader source: Energy.gov [DOE]

    A field test demonstrating the best approaches for terrestrial carbon dioxide storage in the heartland of North America has been successfully completed by one of the U.S. Department of Energy's seven Regional Carbon Sequestration Partnerships.

  6. PHOTOCHEMISTRY IN TERRESTRIAL EXOPLANET ATMOSPHERES. I. PHOTOCHEMISTRY MODEL AND BENCHMARK CASES

    SciTech Connect (OSTI)

    Hu Renyu; Seager, Sara; Bains, William

    2012-12-20

    We present a comprehensive photochemistry model for exploration of the chemical composition of terrestrial exoplanet atmospheres. The photochemistry model is designed from the ground up to have the capacity to treat all types of terrestrial planet atmospheres, ranging from oxidizing through reducing, which makes the code suitable for applications for the wide range of anticipated terrestrial exoplanet compositions. The one-dimensional chemical transport model treats up to 800 chemical reactions, photochemical processes, dry and wet deposition, surface emission, and thermal escape of O, H, C, N, and S bearing species, as well as formation and deposition of elemental sulfur and sulfuric acid aerosols. We validate the model by computing the atmospheric composition of current Earth and Mars and find agreement with observations of major trace gases in Earth's and Mars' atmospheres. We simulate several plausible atmospheric scenarios of terrestrial exoplanets and choose three benchmark cases for atmospheres from reducing to oxidizing. The most interesting finding is that atomic hydrogen is always a more abundant reactive radical than the hydroxyl radical in anoxic atmospheres. Whether atomic hydrogen is the most important removal path for a molecule of interest also depends on the relevant reaction rates. We also find that volcanic carbon compounds (i.e., CH{sub 4} and CO{sub 2}) are chemically long-lived and tend to be well mixed in both reducing and oxidizing atmospheres, and their dry deposition velocities to the surface control the atmospheric oxidation states. Furthermore, we revisit whether photochemically produced oxygen can cause false positives for detecting oxygenic photosynthesis, and find that in 1 bar CO{sub 2}-rich atmospheres oxygen and ozone may build up to levels that have conventionally been accepted as signatures of life, if there is no surface emission of reducing gases. The atmospheric scenarios presented in this paper can serve as the benchmark atmospheres for quickly assessing the lifetime of trace gases in reducing, weakly oxidizing, and highly oxidizing atmospheres on terrestrial exoplanets for the exploration of possible biosignature gases.

  7. Nitrogen attenuation of terrestrial carbon cycle response to global environmental factors

    SciTech Connect (OSTI)

    Jain, Atul; Yang, Xiaojuan; Kheshgi, Haroon; Mcguire, David; Post, Wilfred M

    2009-01-01

    Nitrogen cycle dynamics have the capacity to attenuate the magnitude of global terrestrial carbon sinks and sources driven by CO2 fertilization and changes in climate. In this study, two versions of the terrestrial carbon and nitrogen cycle components of the Integrated Science Assessment Model (ISAM) are used to evaluate how variation in nitrogen availability influences terrestrial carbon sinks and sources in response to changes over the 20th century in global environmental factors including atmospheric CO2 concentration, nitrogen inputs, temperature, precipitation and land use. The two versions of ISAM vary in their treatment of nitrogen availability: ISAM-NC has a terrestrial carbon cycle model coupled to a fully dynamic nitrogen cycle while ISAM-C has an identical carbon cycle model but nitrogen availability is always in sufficient supply. Overall, the two versions of the model estimate approximately the same amount of global mean carbon uptake over the 20th century. However, comparisons of results of ISAM-NC relative to ISAM-C reveal that nitrogen dynamics: (1) reduced the 1990s carbon sink associated with increasing atmospheric CO2 by 0.53 PgC yr1 (1 Pg = 1015g), (2) reduced the 1990s carbon source associated with changes in temperature and precipitation of 0.34 PgC yr1 in the 1990s, (3) an enhanced sink associated with nitrogen inputs by 0.26 PgC yr1, and (4) enhanced the 1990s carbon source associated with changes in land use by 0.08 PgC yr1 in the 1990s. These effects of nitrogen limitation influenced the spatial distribution of the estimated exchange of CO2 with greater sink activity in high latitudes associated with climate effects and a smaller sink of CO2 in the southeastern United States caused by N limitation associated with both CO2 fertilization and forest regrowth. These results indicate that the dynamics of nitrogen availability are important to consider in assessing the spatial distribution and temporal dynamics of terrestrial carbon sources and sinks.

  8. Within- and among-population level differences in response to chronic copper exposure in southern toads, Anaxyrus terrestris

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Within- and among-population level differences in response to chronic copper exposure in southern toads, Anaxyrus terrestris Stacey L. Lance * , R. Wesley Flynn, Matthew R. Erickson 1 , David E. Scott Savannah River Ecology Laboratory, University of Georgia, P.O. Drawer E, Aiken, SC 29802, USA a r t i c l e i n f o Article history: Received 5 September 2012 Received in revised form 29 January 2013 Accepted 5 February 2013 Keywords: Anaxyrus (Bufo) terrestris Amphibian Copper Ecotoxicology Metal

  9. Studies of the terrestrial O{sub 2} and carbon cycles in sand dune gases and in biosphere 2

    SciTech Connect (OSTI)

    Severinghaus, J.P.

    1995-12-31

    Molecular oxygen in the atmosphere is coupled tightly to the terrestrial carbon cycle by the processes of photosynthesis, respiration, and burning. This dissertation examines different aspects of this coupling in four chapters. Chapter 1 explores the feasibility of using air from sand dunes to reconstruct atmospheric O{sub 2} composition centuries ago. Such a record would reveal changes in the mass of the terrestrial biosphere, after correction for known fossil fuel combustion, and constrain the fate of anthropogenic CO{sub 2}.

  10. Mapping pan-Arctic methane emissions at high spatial resolution using an adjoint atmospheric transport and inversion method and process-based wetland and lake biogeochemical models

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Tan, Z.; Zhuang, Q.; Henze, D. K.; Frankenberg, C.; Dlugokencky, E.; Sweeney, C.; Turner, A. J.

    2015-11-18

    Understanding methane emissions from the Arctic, a fast warming carbon reservoir, is important for projecting changes in the global methane cycle under future climate scenarios. Here we optimize Arctic methane emissions with a nested-grid high-resolution inverse model by assimilating both high-precision surface measurements and column-average SCIAMACHY satellite retrievals of methane mole fraction. For the first time, methane emissions from lakes are integrated into an atmospheric transport and inversion estimate, together with prior wetland emissions estimated by six different biogeochemical models. We find that, the global methane emissions during July 2004June 2005 ranged from 496.4 to 511.5 Tg yr?1, with wetlandmoremethane emissions ranging from 130.0 to 203.3 Tg yr?1. The Arctic methane emissions during July 2004June 2005 were in the range of 14.630.4 Tg yr?1, with wetland and lake emissions ranging from 8.8 to 20.4 Tg yr?1 and from 5.4 to 7.9 Tg yr?1 respectively. Canadian and Siberian lakes contributed most of the estimated lake emissions. Due to insufficient measurements in the region, Arctic methane emissions are less constrained in northern Russia than in Alaska, northern Canada and Scandinavia. Comparison of different inversions indicates that the distribution of global and Arctic methane emissions is sensitive to prior wetland emissions. Evaluation with independent datasets shows that the global and Arctic inversions improve estimates of methane mixing ratios in boundary layer and free troposphere. The high-resolution inversions provide more details about the spatial distribution of methane emissions in the Arctic.less

  11. Simulation of annual biogeochemical cycles of nutrient balance, phytoplankton bloom(s), and DO in Puget Sound using an unstructured grid model

    SciTech Connect (OSTI)

    Khangaonkar, Tarang; Sackmann, Brandon S.; Long, Wen; Mohamedali, Teizeen; Roberts, Mindy

    2012-08-14

    Nutrient pollution from rivers, nonpoint source runoff, and nearly 100 wastewater discharges is a potential threat to the ecological health of Puget Sound with evidence of hypoxia in some basins. However, the relative contributions of loads entering Puget Sound from natural and anthropogenic sources, and the effects of exchange flow from the Pacific Ocean are not well understood. Development of a quantitative model of Puget Sound is thus presented to help improve our understanding of the annual biogeochemical cycles in this system using the unstructured grid Finite Volume Coastal Ocean Model (FVCOM) framework and the Integrated Compartment Model (CE QUAL-ICM) water quality kinetics. Results based on 2006 data show that phytoplankton growth and die-off, succession between two species of algae, nutrient dynamics, and dissolved oxygen in Puget Sound are strongly tied to seasonal variation of temperature, solar radiation, and the annual exchange and flushing induced by upwelled Pacific Ocean waters. Concentrations in the mixed outflow surface layer occupying approximately 5?20 m of the upper water column show strong effects of eutrophication from natural and anthropogenic sources, spring and summer algae blooms, accompanied by depleted nutrients but high dissolved oxygen levels. The bottom layer reflects dissolved oxygen and nutrient concentrations of upwelled Pacific Ocean water modulated by mixing with biologically active surface outflow in the Strait of Juan De Fuca prior to entering Puget Sound over the Admiralty Inlet. The effect of reflux mixing at the Admiralty Inlet sill resulting in lower nutrient and higher dissolved oxygen levels in bottom waters of Puget Sound than the incoming upwelled Pacific Ocean water is reproduced. By late winter, with the reduction in algal activity, water column constituents of interest, were renewed and the system appeared to reset with cooler temperature, higher nutrient, and higher dissolved oxygen waters from the Pacific Ocean.

  12. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Radiative Forcing by Long-Lived Greenhouse Gases: Calculations with the AER Models Download a printable PDF Submitter: Iacono, M. J., Atmospheric & Environmental Research, Inc. Delamere, J. S., Tech-X Corporation Mlawer, E. J., Atmospheric & Environmental Research, Inc. Collins, W. D., Lawrence Berkeley National Laboratory Area of Research: General Circulation and Single Column Models/Parameterizations Working Group(s): Radiative Processes Journal Reference: Iacono, MJ, JS Delamere, EJ

  13. Researchers - JCAP

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Our-Peopple-Hero_v2.jpg Researchers Who We Are JCAP Mission JCAP At A Glance Fact Sheets Organizational Chart Recent Science Technology Transfer Awards & Honors Senior Management Scientific Leadership Researchers Governance & Advisory Boards Operations & Administration Who we are Overview JCAP Mission JCAP At A Glance Fact Sheets Organizational Chart Our Achievements Recent Science Technology Transfer Awards & Honors Our People Senior Management Scientific Leadership Researchers

  14. Environmental Research

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Dist. Category UC-l 1, 13 DE@ 010764 Health & Environmental Research Summary of Accomplishments Prepared by Office of Energy Research /U.S. Department of Energy Washington, D.C. 20585 Reprinted April 1984 Published by Technical Information Center/U.S. Department of Energy The purpose of this brief narrative is to foster an awareness of a publicly funded health and environmental research program chartered nearly forty years ago, of its contributions toward the national goal of safe and

  15. NETL Research

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    NETL Research Research One of the U.S. Department of Energy's (DOE) three strategic goals contained in the DOE's 2014-2018 Strategic Plan is to advance foundational science, innovate energy technologies, and inform data driven policies that enhance US economic growth and job creation, energy security, and environmental quality. DOE's National Energy Technology Laboratory contributes to this strategic goal through cutting-edge research and development focused on efficient energy use and clean

  16. PNNL: Research

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Research at PNNL Research is our business With an unwavering focus on our missions, scientists and engineers at PNNL deliver science and technology. We conduct basic research that advances the frontiers of science. We translate discoveries into tools and technologies in science, energy, the environment and national security. For more than four decades, our experts have teamed with government, industry and academia to tackle some of the toughest problems facing our nation. The result: We're

  17. Research | NREL

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Research Researching energy systems and technologies-and the science behind them-for a future powered by clean energy. Subscribe Stay connected with the latest news and research breakthroughs from NREL. Sign up now Photo of the U.S. Department of Energy's Energy Systems Integration Facility at NREL. Energy Systems Integration Facility The only facility in the nation focused on utility-scale clean energy grid integration. Learn More National Bioenergy Center National Center for Photovoltaics

  18. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Size Distributions with Help from Satellites Download a printable PDF Submitter: Mitchell, D. L., Desert Research Institute d'Entremont, R. P., Atmospheric and Environmental...

  19. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Hagos, S. M., Pacific Northwest National Laboratory Area of Research: Atmospheric Thermodynamics and Vertical Structures Working Group(s): Cloud Life Cycle Journal Reference: NA...

  20. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Submitter: Westwater, E. R., University of Colorado Area of Research: Atmospheric Thermodynamics and Vertical Structures Working Group(s): Cloud Properties Journal Reference:...

  1. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Liljegren, J. C., Argonne National Laboratory Area of Research: Atmospheric Thermodynamics and Vertical Structures Working Group(s): Cloud Properties, Radiative Processes...

  2. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Xie, S., Lawrence Livermore National Laboratory Area of Research: Atmospheric Thermodynamics and Vertical Structures Working Group(s): Cloud Modeling Journal Reference: Xie S,...

  3. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Xie, S., Lawrence Livermore National Laboratory Area of Research: Atmospheric Thermodynamics and Vertical Structures Working Group(s): Cloud Life Cycle Journal Reference: Xie...

  4. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Effects of Sea Spray on the Thermodynamics of the Hurricane Boundary Layer Download a printable PDF Submitter: Khain, A., The Hebrew University of Jerusalem Area of Research:...

  5. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Differences Between Tropical and Trade-Wind Shallow Cumuli Download a printable PDF Submitter: Ghate, V. P., Argonne National Laboratory Area of Research: Vertical Velocity Working...

  6. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Climate Research Facility located near Lamont, Oklahoma. Measurements from ARM Raman lidar and Doppler radar instruments were used to both initialize and evaluate the model. A...

  7. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    in the Doppler spectra. Over the North Slope of Alaska, researchers used cloud radar Doppler velocity spectra, lidar backscattering coefficients and depolarization ratios, and...

  8. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Shallow Clouds Make the Case for Remote Sensing Instrumentation Submitter: McFarlane, S. A., U.S. Department of Energy Area of Research: Cloud DistributionsCharacterizations...

  9. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Quantifying Error in the Radiative Forcing of the First Aerosol Indirect Effect Submitter: McComiskey, A. C., National Oceanic and Atmospheric Administration Area of Research:...

  10. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Influence of Dust Composition on Cloud Droplet Formation Download a printable PDF Submitter: Chuang, C., Lawrence Livermore National Laboratory Area of Research: Aerosol Properties...

  11. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Burning on the Prairies Submitter: Bhattacharya, A., Pacific Northwest National Laboratory Area of Research: Radiation Processes Working Group(s): Cloud-Aerosol-Precipitation...

  12. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    energy budget of the atmospheric column. Researchers used measurements of atmospheric temperature and humidity profiles and ground-based retrievals of aerosol optical...

  13. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Lovejoy, S., McGill University Area of Research: Atmospheric Thermodynamics and Vertical Structures Working Group(s): Cloud Properties Journal Reference: Lovejoy, S., D....

  14. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    percent confidence intervals calculated from instrument uptime are given by the grey boundaries. The Atmospheric Radiation Measurement (ARM) Climate Research Facility has...

  15. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    New Method for Three-Dimensional Imaging of Cirrus Clouds Submitter: Liou, K., University of California, Los Angeles Area of Research: Cloud DistributionsCharacterizations Working...

  16. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Cotton-Ball Clouds Contained Download a printable PDF Submitter: Berg, L., Pacific Northwest National Laboratory Area of Research: Cloud Processes Working Group(s): Cloud Life...

  17. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    and climate change. The study, funded in large part by DOE's Atmospheric System Research program and recently discussed in the Quarterly Journal of the Royal Meteorological...

  18. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    a printable PDF Submitter: Marshak, A., NASA - Goddard Space Flight Center Area of Research: Radiation Processes Working Group(s): Cloud-Aerosol-Precipitation Interactions...

  19. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Fog and Rain in the Amazon Download a printable PDF Submitter: Gentine, P., Columbia University Sobel, A., Columbia University Area of Research: Cloud-Aerosol-Precipitation...

  20. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    of MBL Cloud Properties over the Azores Download a printable PDF Submitter: Dong, X., University of North Dakota Area of Research: Radiation Processes Working Group(s): Cloud...

  1. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Climate Change Download a printable PDF Submitter: Maseyk, K. S., Universite Pierre et Marie Curie, Paris 6 Area of Research: Surface Properties Working Group(s):...

  2. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    2012. "Lateral entrainment rate in shallow cumuli: Dependence on dry air sources and probability density functions." Geophysical Research Letters, 39, L20812, doi:10.1029...

  3. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Modeling Cloud Forcing in the Tropical West Pacific Submitter: Kiehl, J., NCAR Area of Research: General Circulation and Single Column ModelsParameterizations Working Group(s):...

  4. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    SGP Observations Help Validate Soil Temperature Simulations Download a printable PDF Submitter: Huang, M., Pacific Northwest National Laboratory Area of Research: Surface...

  5. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Validation of CERES-MODIS Cloud Retrievals Using the Azores Data Download a printable PDF Submitter: Dong, X., University of North Dakota Area of Research: Cloud Processes Working...

  6. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Kishcha, P., Tel-Aviv University Starobinets, B., Tel-Aviv University Kalashnikova, O., Jet Propulsion Laboratory Alpert, P., Tel-Aviv University Area of Research: Radiation...

  7. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Zhang, Q., University of California, Davis Fast, J. ., Pacific Northwest National Laboratory Area of Research: Aerosol Processes Working Group(s): Aerosol Life Cycle Journal...

  8. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    to Lose Download a printable PDF Submitter: Laskin, A., Pacific Northwest National Laboratory Fast, J. ., Pacific Northwest National Laboratory Area of Research: Aerosol...

  9. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Probing the Birth of New Particles Download a printable PDF Submitter: Wang, J., Brookhaven National Laboratory Area of Research: Aerosol Processes Working Group(s): Aerosol Life...

  10. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ARM Sites Enable Assessment of Cluster Analysis for Identifying Cloud Regimes Submitter: Jakob, C., Monash University Area of Research: Cloud DistributionsCharacterizations...

  11. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Field Campaign Resource Allocation Using Statistical Decision Analysis Download a printable PDF Submitter: Hanlon, C., Pennsylvania State University Area of Research: Cloud...

  12. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Rosettes in Cirrus Download a printable PDF Submitter: Um, J., University of Illinois, Urbana McFarquhar, G., University of Illinois, Urbana Area of Research: Radiation Processes...

  13. UNIRIB: Research

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    of the University Radioactive Ion Beam (UNIRIB) consortium is to perform nuclear physics research, and provide training and education. UNIRIB member universities have gained...

  14. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Black Carbon Aerosols and the Third Polar Ice Cap Submitter: Menon, S., Lawrence Berkeley National Laboratory Area of Research: General Circulation and Single Column Models...

  15. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Rain and Cloud Resistance Download a printable PDF Submitter: Flaherty, J., Pacific Northwest National Laboratory Area of Research: Cloud DistributionsCharacterizations Working...

  16. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Quantifying the Magnitude of Anomalous Solar Absorption Submitter: Ackerman, T. P., University of Washington Area of Research: General Circulation and Single Column Models...

  17. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Development and Recent Evaluation of the MTCKD Model of Continuum Absorption Download a printable PDF Submitter: Mlawer, E. J., Atmospheric & Environmental Research, Inc. Area of...

  18. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Area of Research: Cloud DistributionsCharacterizations Working Group(s): Cloud Life Cycle Journal Reference: Zhao Y, GG Mace, and JM Comstock. 2011. "The occurrence of particle ...

  19. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    of Research: Cloud DistributionsCharacterizations Working Group(s): Cloud Life Cycle Journal Reference: NA Distributions of cloud optical depth from Aqua in four regions. The...

  20. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    of Geophysical Research - Atmospheres, 118(16), doi:10.1002jgrd.50711. SPADE's methodology complements a traditional workflow for identifying resolution dependence by...

  1. Research Areas

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    in diverse research areas such as cell biology, lithography, infrared microscopy, radiology, and x-ray tomography. Time-Resolved These techniques exploit the pulsed nature of...

  2. Research Highlight

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    Production Flux of Sea-Spray Aerosol Download a printable PDF Submitter: Schwartz, S. E., Brookhaven National Laboratory Area of Research: Aerosol Properties Working Group(s):...

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    Northwest National Laboratory, researchers found that a significant increase in the amount of light scattered by the clouds was caused by the amount of pollution in the air. ...

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    CMBE - a New ACRF Data Product for Climate Studies Download a printable PDF Submitter: Xie, S., Lawrence Livermore National Laboratory Area of Research: Cloud Distributions...

  5. Research Highlight

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    Aerosols Help Heat Up the Yangtze River Delta in China Download a printable PDF Submitter: Flynn, C. J., Pacific Northwest National Laboratory Area of Research: Aerosol Properties...

  6. Research Highlight

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    A Lidar View of Clouds in Southeastern China Download a printable PDF Submitter: Li, Z., University of Maryland Cribb, M. C., University of Maryland Area of Research: Cloud...

  7. Research Highlight

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    Small Processes Make a Big Difference in Model Outcomes Submitter: Cole, J. N., Canadian Centre for Climate Modelling and Analysis Area of Research: General Circulation and Single...

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    Liquid Water the Key to Arctic Cloud Radiative Closure Download a printable PDF Submitter: Shupe, M., University of Colorado Area of Research: Cloud DistributionsCharacterizations...

  9. Research Highlight

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    Observational Evidence of Changes in Water Vapor, Clouds, and Radiation Submitter: Dong, X., University of North Dakota Area of Research: Cloud DistributionsCharacterizations...

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    A Comparison of Integrated Water Vapor Sensors: WVIOP-96 Submitter: Liljegren, J. C., Argonne National Laboratory Area of Research: Atmospheric Thermodynamics and Vertical...

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    Improved Accuracy in Liquid Water Path Retrievals Submitter: Turner, D. D., National Oceanic and Atmospheric Administration Area of Research: Clouds with Low Optical Water Depths...

  12. Research Highlight

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    Integrated Water Vapor and Cloud Liquid Water at MCTEX Submitter: Liljegren, J. C., Argonne National Laboratory Area of Research: Atmospheric Thermodynamics and Vertical Structures...

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    Looking at the Full Spectrum for Water Vapor Download a printable PDF Submitter: Turner, D. D., National Oceanic and Atmospheric Administration Area of Research: Radiation...

  14. Research Highlight

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    Progress in Understanding Water Vapor's Role in Models Submitter: Ackerman, T. P., University of Washington Area of Research: General Circulation and Single Column Models...

  15. Research Highlight

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    First Observation-Based Estimates of Cloud-Free Aerosol Radiative Forcing Across China Download a printable PDF Submitter: Li, Z., University of Maryland Area of Research: Aerosol...

  16. Research Areas

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    environment and health issues; and to advance the engineering of biological systems for sustainable manufacturing. Biosciences Area research is coordinated through three...

  17. Research Highlight

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    Pollution + Storm Clouds Warmer Atmosphere Download a printable PDF Submitter: Fan, J., Pacific Northwest National Laboratory Area of Research: Cloud-Aerosol-Precipitation...

  18. Research Highlight

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    Cloud-Radiation Effects on Sea Ice Loss Download a printable PDF Submitter: Stephens, G. L., Colorado State University Area of Research: Cloud DistributionsCharacterizations...

  19. Research Highlight

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    Mid-Level Cloud Formation at the ARM Darwin Site Download a printable PDF Submitter: Riihimaki, L., Pacific Northwest National Laboratory Area of Research: Cloud Distributions...

  20. Summaries of FY 1994 geosciences research

    SciTech Connect (OSTI)

    Not Available

    1994-12-01

    The Geosciences Research Program is directed by the Department of Energy`s (DOE`s) Office of Energy Research (OER) through its Office of Basic Energy Sciences (OBES). Activities in the Geosciences Research Program are directed toward the long-term fundamental knowledge of the processes that transport, modify, concentrate, and emplace (1) the energy and mineral resources of the earth and (2) the energy byproducts of man. The Program is divided into five broad categories: Geophysics and earth dynamics; Geochemistry; Energy resource recognition, evaluation, and utilization; Hydrogeology and exogeochemistry; and Solar-terrestrial interactions. The summaries in this document, prepared by the investigators, describe the scope of the individual programs in these main areas and their subdivisions including earth dynamics, properties of earth materials, rock mechanics, underground imaging, rock-fluid interactions, continental scientific drilling, geochemical transport, solar/atmospheric physics, and modeling, with emphasis on the interdisciplinary areas.

  1. Research | Photosynthetic Antenna Research Center

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Research Research Mission Statement The objective of PARC is to understand the basic scientific principles that underpin the efficient functioning of natural photosynthetic antenna systems as a basis for design of biohybrid and bioinspired architectures for next-generation systems for solar-energy conversion. Scientific Themes Through basic scientific research, PARC seeks to understand the principles of light harvesting and energy funneling as applied to The PARC Vision Graphic three

  2. Single-junction solar cells with the optimum band gap for terrestrial concentrator applications

    DOE Patents [OSTI]

    Wanlass, M.W.

    1994-12-27

    A single-junction solar cell is described having the ideal band gap for terrestrial concentrator applications. Computer modeling studies of single-junction solar cells have shown that the presence of absorption bands in the direct spectrum has the effect of ''pinning'' the optimum band gap for a wide range of operating conditions at a value of 1.14[+-]0.02 eV. Efficiencies exceeding 30% may be possible at high concentration ratios for devices with the ideal band gap. 7 figures.

  3. Research Highlight

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    in Climate Models: Results from TC4 and ISDAC Download a printable PDF Submitter: Mitchell, D. L., Desert Research Institute Mishra, S., DOE - SunShot Initiative, AAAS S&T...

  4. Research Highlight

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    Area of Research: Cloud Processes Working Group(s): Cloud Life Cycle Journal Reference: Wong M, M Ovchinnikov, and M Wang. 2015. "Evaluation of subgrid-scale hydrometeor transport...

  5. Research Highlight

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    using Tropical Warm Pool-International Cloud Experiment data." Journal of Geophysical Research - Atmospheres, 114, D14107, doi:10.10292008JD011220. Wang W and X Liu. 2009....

  6. Research Highlight

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    C., Texas A&M University Area of Research: Cloud Processes Working Group(s): Cloud Life Cycle Journal Reference: Lappen C and C Schumacher. 2014. "The role of tilted heating in the...

  7. Research Highlight

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    National Laboratory Area of Research: Cloud Processes Working Group(s): Cloud Life Cycle Journal Reference: Feng Z, X Dong, B Xi, S McFarlane, A Kennedy, B Lin, and P Minnis....

  8. Research Highlight

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    Area of Research: General Circulation and Single Column ModelsParameterizations Working Group(s): Cloud Modeling Journal Reference: Ghan, S.J. and Leung, L.R., 1999: "A...

  9. Research Highlight

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    Adoption of RRTMG in the NCAR CAM5 and CESM1 Global Climate Models Download a printable PDF Submitter: Iacono, M. J., Atmospheric & Environmental Research, Inc. Collins, W. D.,...

  10. Research Highlight

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    Research - Atmospheres, 119(23), 10.10022014JD022038. a) Dependence of inversion cap on mean SSTs and b) dependence of low-level relative humidities on inversion cap based...

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    Area of Research: Cloud DistributionsCharacterizations Working Group(s): Cloud Modeling Journal Reference: Naud, C, A Del Genio, GG Mace, S Benson, EE Clothiaux, and P Kollias. ...

  12. Research Highlight

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    Journal Reference: Long CN, SA McFarlane, A Del Genio, P Minnis, TP Ackerman, J Mather, J Comstock, GG Mace, M Jensen, and C Jakob. 2013. "ARM research in the equatorial western ...

  13. Research Highlight

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    Area of Research: Cloud DistributionsCharacterizations Working Group(s): Cloud Properties Journal Reference: Wang X, KN Liou, SS Ou, GG Mace, and M Deng. 2009. "Remote sensing of ...

  14. Research Highlight

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    Area of Research: General Circulation and Single Column ModelsParameterizations Working Group(s): Cloud Life Cycle Journal Reference: Mace GG, S Houser, S Benson, SA Klein, and QL ...

  15. Research Facility,

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    and Delivering the Data As a general condition for use of the ARM Climate Research Facility, users are required to include their data in the ARM Data Archive. All data acquired...

  16. Research Highlight

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    McFarlane, S. A., U.S. Department of Energy Khain, A., The Hebrew University of Jerusalem Area of Research: Cloud DistributionsCharacterizations Working Group(s): Cloud...

  17. Research Highlight

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    Geophysical Research Letters, , doi:10.10022015GL064009. ONLINE. A 14-minute sequence of cloud growth as observed by a camera located at the MAST Academy in Miami,...

  18. Research Highlight

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    Threshold Radar Reflectivity Separating Precipitating from Non-Precipitating Clouds Download a printable PDF Submitter: Liu, Y., Brookhaven National Laboratory Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Properties Journal Reference: Liu, Y, B Geerts, PH Daum, R McGraw, and M Miller. 2008. "Threshold radar reflectivity for drizzling clouds." Geophysical Research Letters 35, L03807, doi:10.1029/2007GL031201. Figure 1 shows the comparison of the

  19. Research Highlight

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    Small Ice Crystals on Ice Sedimentation Rates in Cirrus Clouds and GCM Simulations Download a printable PDF Submitter: Mitchell, D. L., Desert Research Institute Rasch, P., Pacific Northwest National Laboratory Ivanova, D., Embry-Riddle Aeronautical University McFarquhar, G., University of Illinois, Urbana Nousiainen, T. P., University of Helsinki Area of Research: General Circulation and Single Column Models/Parameterizations Working Group(s): Cloud Properties Journal Reference: Mitchell, DL, P

  20. Research Highlight

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    Arctic Aerosol Study Flies By Download a printable PDF Submitter: Schmid, B., Pacific Northwest National Laboratory Area of Research: Aerosol Properties Working Group(s): Aerosol Journal Reference: ARM Climate Research Facility Operations Update, April 30, 2008, Edition Preliminary screening and analysis of images from the time-resolved aerosol collector indicate particles laden with carbon and sulfur. These data were obtained on April 8, 2008. Image courtesy of Alexander Laskin, PNNL. Images

  1. Research Highlight

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    The Surprisingly Large Contribution of Small Marine Clouds to Cloud Fraction and Reflectance Download a printable PDF Submitter: Oreopoulos, L., NASA Feingold, G., NOAA - Earth System Research Laboratory Koren, I., Weizmann Institute of Science Remer, L., NASA - GSFC, Laboratory for Atmospheres Area of Research: Clouds with Low Optical [Water] Depths (CLOWD) Working Group(s): Cloud Properties Journal Reference: Koren, I, L Oreopoulos, G Feingold, LA Remer, and O Altaratz. 2008. "How small

  2. Research Highlight

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    Atmospheric Aerosol Measurements on Cloudy Days: a New Method Download a printable PDF Submitter: Kassianov, E., Pacific Northwest National Laboratory Ovchinnikov, M., Pacific Northwest National Laboratory Area of Research: Aerosol Properties Working Group(s): Aerosol Journal Reference: Kassianov, EI, and M Ovtchinnikov. 2008. "On reflectance ratios and aerosol optical depth retrieval in the presence of cumulus clouds." Geophysical Research Letters doi:10.1029/2008GL033231.

  3. Research Highlight

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    Retrieving Dust Optical Depth and Mineral Composition from Infrared Spectra Download a printable PDF Submitter: Turner, D. D., National Oceanic and Atmospheric Administration Area of Research: Radiation Processes Working Group(s): Radiative Processes Journal Reference: Turner DD. 2008. "Ground-based retrievals of optical depth, effective radius, and composition of airborne mineral dust above the Sahel." Journal of Geophysical Research - Atmospheres, 113, D00E03,

  4. Research Highlight

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    Detection and Retrieval of Cirrus Clouds in the Tropics from AIRS: Validation from ARM Data Submitter: Yue, Q., Jet Propulsion Laboratory/California Institute of Technology Liou, K., University of California, Los Angeles Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Properties Journal Reference: Yue Q and KN Liou. 2009. "Cirrus cloud optical and microphysical properties determined from AIRS infrared spectra." Geophysical Research Letters, 36, L05810,

  5. Research Highlight

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    Thin Is In Download a printable PDF Submitter: Tomlinson, J., Pacific Northwest National Laboratory Long, C. N., NOAA Global Monitoring Division/CIRES Comstock, J. M., Pacific Northwest National Laboratory Ronfeld, D., Pacific Northwest National Laboratory Area of Research: Radiation Processes Working Group(s): Cloud Properties Journal Reference: N/A The Twin Otter takes off to test the onboard instruments for the RACORO field campaign that began in January 2009. Researchers are gathering data

  6. Research Highlight

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    Clouds Brighten Up the Sky Near Them Download a printable PDF Submitter: Varnai, T., University of Maryland, Baltimore County/JCEST Marshak, A., NASA - Goddard Space Flight Center Area of Research: Radiation Processes Working Group(s): Radiative Processes Journal Reference: Varnai T and A Marshak. 2009. "MODIS observations of enhanced clear sky reflectance near clouds." Geophysical Research Letters, 36, L06807, doi:10.1029/2008GL037089. Figure 1. Illustration of clouds enhancing the

  7. Research Highlight

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    Field Experiments to Improve the Treatment of Radiation in the Mid-to-Upper Troposphere Download a printable PDF Submitter: Turner, D. D., National Oceanic and Atmospheric Administration Mlawer, E. J., Atmospheric & Environmental Research, Inc. Area of Research: Radiation Processes Working Group(s): Cloud-Aerosol-Precipitation Interactions Journal Reference: Turner DD and EJ Mlawer. 2010. "The Radiative Heating in Underexplored Bands Campaigns (RHUBC)." Bulletin of the American

  8. Research Highlight

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    New Method for Retrieving Cloud Heights from Satellite Data Download a printable PDF Submitter: Chang, F., Science Systems and Applications, Inc. Minnis, P., NASA - Langley Research Center Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Properties Journal Reference: Chang F, P Minnis, B Lin, MM Khaiyer, R Palikonda, and DA Spangenberg. 2010. "A modified method for inferring cloud top height using GOES-12 imager 10.7- and 13.3-µm data." Journal of

  9. Research Highlight

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    Surface Summertime Radiative Forcing by Shallow Cumuli at the ARM SGP Download a printable PDF Submitter: Berg, L., Pacific Northwest National Laboratory Area of Research: Radiation Processes Working Group(s): Cloud Life Cycle Journal Reference: Berg LK, EI Kassianov, CN Long, and DL Mills. 2011. "Surface summertime radiative forcing by shallow cumuli at the ARM SGP." Journal of Geophysical Research - Atmospheres, 116, D01202, 10.1029/2010JD014593. Histogram of hourly average shortwave

  10. Research Highlight

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    Cumuli Impact on Solar Radiation at Surface: Spectral Changes Download a printable PDF Submitter: Kassianov, E., Pacific Northwest National Laboratory Area of Research: Aerosol Properties Working Group(s): Aerosol Life Cycle, Cloud Life Cycle, Cloud-Aerosol-Precipitation Interactions Journal Reference: Kassianov E, J Barnard, LK Berg, CN Long, and C Flynn. 2011. "Shortwave spectral radiative forcing of cumulus clouds from surface observations." Geophysical Research Letters, 38, L07801,

  11. Research Highlight

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    Ice Heating Up Cold Clouds Download a printable PDF Submitter: Ovchinnikov, M., Pacific Northwest National Laboratory Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud-Aerosol-Precipitation Interactions Journal Reference: Ovchinnikov M, A Korolev, and J Fan. 2011. "Effects of ice number concentration on dynamics of a shallow mixed-phase stratiform cloud." Journal of Geophysical Research - Atmospheres, 116, D00T06, doi:10.1029/2011JD015888. The mighty cloud

  12. Research Highlight

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    First Ground-Based Spectral Observations of the Entire Infrared Band Download a printable PDF Submitter: Turner, D. D., National Oceanic and Atmospheric Administration Mlawer, E. J., Atmospheric & Environmental Research, Inc. Area of Research: Radiation Processes Working Group(s): Aerosol Life Cycle, Cloud Life Cycle Journal Reference: Turner DD, EJ Mlawer, G Bianchini, MP Cadeddu, S Crewell, JS Delamere, RO Knuteson, G Maschwitz, M Mlynzcak, S Paine, L Palchetti, and DC Tobin. 2012.

  13. Research Highlight

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    "Invisible" Giants in the Sky Download a printable PDF Submitter: Kassianov, E., Pacific Northwest National Laboratory Area of Research: Radiation Processes Working Group(s): Aerosol Life Cycle Journal Reference: Kassianov E, M Pekour, and J Barnard. 2012. "Aerosols in central California: Unexpectedly large contribution of coarse mode to aerosol radiative forcing." Geophysical Research Letters, 39, L20806, doi:10.1029/2012GL053469. Daily averaged values of (a, b) the direct

  14. Research Highlight

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    Lord of the Wings: Elevated Particles a Rising Star Download a printable PDF Submitter: Kassianov, E., Pacific Northwest National Laboratory Area of Research: Radiation Processes Working Group(s): Aerosol Life Cycle Journal Reference: Kassianov E, C Flynn, J Redemann, B Schmid, PB Russell, and A Sinyuk. 2012. "Initial assessment of the Spectrometer for Sky-Scanning, Sun-Tracking Atmospheric Research (4STAR)-based aerosol retrieval: Sensitivity study." Atmosphere, 3,

  15. Research Highlight

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    Evaluation of Cloud Properties in Major Reanalyses Download a printable PDF Submitter: Liu, Y., Brookhaven National Laboratory Wu, W., Brookhaven National Laboratory Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Life Cycle Journal Reference: Wu W, YG Liu, and AK Betts. 2012. "Observationally based evaluation of NWP reanalyses in modeling cloud properties over the Southern Great Plains." Journal of Geophysical Research - Atmospheres, 117, D12202,

  16. Research Highlight

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    Higher Clouds Retain Less Energy Download a printable PDF Submitter: Bhattacharya, A., Pacific Northwest National Laboratory Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Life Cycle Journal Reference: Qiu Y, Q Wang, and F Hu. 2012. "Shouxian aerosol radiative properties measured by DOE AMF and compared with CERES-MODIS." Advanced Materials Research, 518-523(2), doi:10.4028/www.scientific.net/AMR.518-523.1973. Clouds with bases at different altitudes.

  17. Research Highlight

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    Micropulse Lidar-Derived Aerosol Optical Depth Climatology at ARM Sites Worldwide Download a printable PDF Submitter: Kafle, D. N., NASA GSFC /ADNET Systems Coulter, R. L., Argonne National Laboratory Area of Research: Aerosol Properties Working Group(s): Aerosol Life Cycle Journal Reference: Kafle DN and RL Coulter. 2013. "Micropulse lidar-derived aerosol optical depth climatology at ARM sites worldwide." Journal of Geophysical Research - Atmospheres, 118(13), 10.1002/jgrd.50536.

  18. Research Highlight

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    The Brass Ring of Climate Modeling Download a printable PDF Submitter: Ghan, S. J., Pacific Northwest National Laboratory Area of Research: Aerosol Processes Working Group(s): Cloud-Aerosol-Precipitation Interactions Journal Reference: Ghan SJ, SJ Smith, M Wang, K Zhang, K Pringle, K Carslaw, J Pierce, S Bauer, and P Adams. 2013. "A simple model of global aerosol indirect effects." Journal of Geophysical Research - Atmospheres, 118, 1-20. The simple model of aerosol effects on clouds

  19. Research Highlight

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    Twenty Years Serving Climate Science Download a printable PDF Submitter: Mather, J. H., Pacific Northwest National Laboratory Area of Research: Cloud Processes Working Group(s): Aerosol Life Cycle, Cloud Life Cycle, Cloud-Aerosol-Precipitation Interactions Journal Reference: Mather JH and JW Voyles. 2013. "The ARM Climate Research Facility: a review of structure and capabilities." Bulletin of the American Meteorological Society, 94(3), doi:10.1175/BAMS-D-11-00218.1. A scanning ARM

  20. Research Highlight

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    Evaluation of WRF Microphysics Schemes in Squall Line Simulations Download a printable PDF Submitter: Dong, X., University of North Dakota Area of Research: Cloud Processes Working Group(s): Cloud Life Cycle Journal Reference: Wu D, B Xi, Z Feng, A Kennedy, M Grenchen, G Matt, and T W-K. 2013. "The impact of various WRF single-moment microphysics parameterizations on squall line precipitation events." Journal of Geophysical Research - Atmospheres, 118, doi:10.1002/jgrd.50798.

  1. Research Highlight

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    Hemispherical Simulations Show Impact of Aerosols on Cloud Reflectivity Submitter: Rotstayn, L., Commonwealth Scientific and Industrial Research Organization Area of Research: Aerosol Properties Working Group(s): Aerosol Journal Reference: Rotstayn, L., and Y. Liu, Sensitivity of the First Indirect Aerosol Effect to an Increase in Cloud Droplet Spectral Dispersion with Droplet Number Concentration, Journal of Climate: Vol. 16, No. 21, pp.3476-3481, May 2003. Figure 1. Measurements of the

  2. Research Highlight

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    Invisible Giants in the Sky Download a printable PDF Submitter: Kassianov, E., Pacific Northwest National Laboratory Area of Research: Cloud-Aerosol-Precipitation Interactions Working Group(s): Cloud-Aerosol-Precipitation Interactions Journal Reference: Kassianov E, M Pekour, and J Barnard. 2012. "Aerosols in central California: Unexpectedly large contribution of coarse mode to aerosol radiative forcing." Geophysical Research Letters, 39, L20806, doi:10.1029/2012GL053469. Photo

  3. Research Highlight

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    The Overambitious Other Carbon Submitter: Church, J., Pacific Northwest National Laboratory Area of Research: Aerosol Properties Working Group(s): Aerosol Life Cycle Journal Reference: Song C, M Gyawali, RA Zaveri, JE Shilling, and WP Arnott. 2013. "Light absorption by secondary organic aerosol from α-pinene: Effects of oxidants, seed aerosol acidity, and relative humidity." Journal of Geophysical Research - Atmospheres, 118, doi:10.1002/jgrd.50767. Time-dependent Mass Absorption

  4. Research Highlight

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    Observational Analysis of Land-Atmosphere Coupling for Climate Model Evaluation Download a printable PDF Submitter: Phillips, T. J., Lawrence Livermore National Laboratory Klein, S., Lawrence Livermore National Laboratory Area of Research: Surface Properties Working Group(s): Cloud Life Cycle Journal Reference: Phillips TJ and SA Klein. 2014. "Land-atmosphere coupling manifested in warm-season observations on the U.S. southern great plains." Journal of Geophysical Research -

  5. Research Highlight

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    A Revealing Look Inside Northern Australian Wet Season Precipitation Download a printable PDF Submitter: Giangrande, S., Brookhaven National Laboratory Area of Research: Surface Properties Working Group(s): Cloud Life Cycle Journal Reference: Giangrande SE, M Bartholomew, M Pope, S Collis, and MP Jensen. 2014. "A Summary of Precipitation Characteristics from the 2006-2011 Northern Australian Wet Seasons as Revealed by ARM Disdrometer Research Facilities (Darwin, Australia)." Journal of

  6. Research Highlight

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    Accuracy of GFS and ECMWF Hurricane Sandy Track Forecasts Dependent on Cumulus Parameterization Download a printable PDF Submitter: Bassill, N. P., University of Utah Zipser, E., University of Utah Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Life Cycle Journal Reference: Bassill NP. 2014. "Accuracy of early GFS and ECMWF Sandy (2012) track forecasts: Evidence for a dependence on cumulus parameterization." Geophysical Research Letters, ,

  7. Research Highlight

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    Checking Up on Tropical Sunlight Download a printable PDF Submitter: Riihimaki, L., Pacific Northwest National Laboratory Long, C. N., NOAA Global Monitoring Division/CIRES Area of Research: Radiation Processes Working Group(s): Cloud Life Cycle Journal Reference: Riihimaki LD and CN Long. 2014. "Spatial variability of surface irradiance measurements at the Manus ARM site." Journal of Geophysical Research - Atmospheres, 119(9), 5475-5491. ACCEPTED. The radiometer system used at the

  8. Research Highlight

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    Water Vapor Turbulence Statistics in the Convective Boundary Layer Download a printable PDF Submitter: Turner, D. D., National Oceanic and Atmospheric Administration Area of Research: Atmospheric Thermodynamics and Vertical Structures Working Group(s): Cloud Life Cycle Journal Reference: Turner DD, V Wulfmeyer, LK Berg, and JH Schween. 2014. "Water vapor turbulence profiles in stationary continental convective mixed layers." Journal of Geophysical Research - Atmospheres, 119,

  9. Research Highlight

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    A Novel Approach for Introducing 3D Cloud Spatial Structure Into 1D Radiative Transfer Download a printable PDF Submitter: Huang, D., Brookhaven National Laboratory Area of Research: Radiation Processes Working Group(s): Cloud Life Cycle Journal Reference: Huang D and Y Liu. 2015. "A novel approach for introducing cloud spatial structure into cloud radiative transfer parameterizations." Environmental Research Letters, 9(12), 124022. An example of a 3D cloud liquid water content field

  10. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Comparison of Vertical Velocities in Cirrus Derived from Aircraft and Ground-based Radar Download a printable PDF Submitter: Muhlbauer, A., University of Washington Kalesse, H., Leibniz Institute for Tropospheric Research Area of Research: Vertical Velocity Working Group(s): Cloud Life Cycle Journal Reference: Muhlbauer A, H Kalesse, and P Kollias. 2014. "Vertical velocities and turbulence in midlatitude anvil cirrus: A comparison between in situ aircraft measurements and ground-based

  11. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Assessing Impact of Shattered Artifacts on Measured Size Distributions Download a printable PDF Submitter: McFarquhar, G., University of Illinois, Urbana Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Life Cycle Journal Reference: N/A Figure 1. (a) Photograph of 2DC with standard tips; and (b) with modified tips installed on the left pod of the National Research Council of Canada Convair 580 during ISDAC. Figure 2. (a) Ratio of number concentration of particles

  12. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    MBL Cloud and CCN Properties Under Coupled and Decoupled Conditions Submitter: Dong, X., University of North Dakota Area of Research: Cloud-Aerosol-Precipitation Interactions Working Group(s): Cloud-Aerosol-Precipitation Interactions Journal Reference: Dong X, A Schwantes, B Xi, and P Wu. 2015. "Investigation of the marine boundary layer cloud and CCN properties under coupled and decoupled conditions over the Azores." Journal of Geophysical Research - Atmospheres, , 1-13. ONLINE. A

  13. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Retrieving Cloud and Aerosol Properties from the ARM Raman Lidar Download a printable PDF Submitter: Thorsen, T., NASA - Langley Research Center Fu, Q., University of Washington Area of Research: Cloud Distributions/Characterizations Working Group(s): Aerosol Life Cycle, Cloud Life Cycle Journal Reference: Thorsen TJ, Q Fu, RK Newsom, DD Turner, and JM Comstock. 2015. "Automated retrieval of cloud and aerosol properties from the ARM Raman lidar, Part I: Feature detection." Journal of

  14. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    The Role of Ice Nuclei Recycling in the Maintenance of Cloud Ice in Arctic Mixed-phase Stratocumulus Download a printable PDF Submitter: Solomon, A., NOAA/ESRL/Physical Sciences Division Feingold, G., NOAA - Earth System Research Laboratory Area of Research: Cloud-Aerosol-Precipitation Interactions Working Group(s): Cloud Life Cycle Journal Reference: Solomon A, G Feingold, and MD Shupe. 2015. "The role of ice nuclei recycling in the maintenance of cloud ice in Arctic mixed-phase

  15. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Roles of Wind Shear at Different Vertical Levels in Cloud System Organization and Properties Download a printable PDF Submitter: Fan, J., Pacific Northwest National Laboratory Area of Research: Cloud Processes Working Group(s): Cloud-Aerosol-Precipitation Interactions Journal Reference: Chen Q, J Fan, S Hagos, W Gustafson, and L Berg. 2015. "Roles of wind shear at different vertical levels, Part I: Cloud system organization and properties." Journal of Geophysical Research -

  16. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Pollution Changes Clouds' Ice Crystal Genesis Download a printable PDF Submitter: Kulkarni, G., Pacific Northwest National Laboratory Area of Research: Cloud Processes Working Group(s): Cloud Life Cycle Journal Reference: Kulkarni GR, K Zhang, C Zhao, M Nandasiri, V Shutthanandan, X Liu, L Berg, and J Fast. 2015. "Ice formation on nitric acid-coated dust particles: Laboratory and modeling studies." Journal of Geophysical Research - Atmospheres, 120(15), doi:10.1002/2014JD022637.

  17. Research Projects

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Research Projects Joint Los Alamos National Laboratory/UCSD Research Projects Collaborations between Los Alamos National Laboratory and the University of California at San Diego (UCSD) Jacobs School of Engineering Contact Institute Director Charles Farrar (505) 663-5330 Email UCSD EI Director Michael Todd (858) 534-5951 Professional Staff Assistant Jutta Kayser (505) 663-5649 Email Administrative Assistant Stacy Baker (505) 663-5233 Email "Since 2003, LANL has funded numerous collaborative

  18. Research Capabilities

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Research Capabilities Research Capabilities These capabilities are our science and engineering at work for the national security interest in areas from global climate to cyber security, from nonproliferation to new materials, from clean energy, to supercomputing. thumbnail of Bioscience At Los Alamos, scientists and engineers are working to unlock many of the mechanisms found in nature to improve humanity's ability to battle diseases, create new forms of environmentally friendly and abundant

  19. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    From Fire to Ice Download a printable PDF Submitter: Kulkarni, G., Pacific Northwest National Laboratory Area of Research: Aerosol Properties Working Group(s): Aerosol Life Cycle Journal Reference: Kulkarni GR, M Nandasiri, A Zelenyuk, J Beranek, N Madaan, A Devaraj, V Shutthanandan, S Thevuthasan, and T Varga. 2015. "Effects of crystallographic properties on the ice nucleation properties of volcanic ash particles." Geophysical Research Letters, 42(8), doi:10.1002/2015GL063270. Tons of

  20. Sitewide biological risk assessment Eielson Air Force Base, Alaska: Risks to terrestrial receptors from diverse contaminants

    SciTech Connect (OSTI)

    Brandt, C.A.; Becker, J.M.

    1995-12-31

    Eielson Air Force Base (AFB) is located southeast of Fairbanks, Alaska. Eielson AFB was listed by the US Environmental Protection Agency on the National Priorities List with a total of 64 potential terrestrial and aquatic source areas. Contaminants of concern include fuel and fuel components, pesticides, polychlorinated biphenyls (PCBs), and lead. As part of the remedial investigations of these sites, a biological risk assessment (BRA) was conducted to estimate the risk of ecological effects on terrestrial receptors posed by contaminants in the Eielson environment. There are 32 mammal species, 117 bird species, 17 fish species, and 1 amphibian species known to inhabit Eielson AFB and vicinity. The BRA screened source areas based on completed biological exposure pathways, selected receptors for analysis, estimated exposure of receptors to contaminants, and compared these exposures to known toxicological effects. Lower Garrison Slough and Flightline Pond posed a substantial risk for shrikes and goshawks. Ingestion of PCBs constituted the primary pathway/contaminant combination contributing to this risk. The effects of the various sources of uncertainty in the ingestion exposure calculations for these sites were evaluated in a probabilistic risk assessment using Monte Carlo methods. There was an 11% risk of reproductive effects from PCBs for goshawks feeding from Flightline Pond and a 25 % risk from lower Garrison Slough. There was an 81 % risk of reproductive effects from PCB exposure for shrikes feeding near lower Garrison Slough.

  1. Summary outline of DOE geoscience and geoscience - related research

    SciTech Connect (OSTI)

    Not Available

    1982-02-01

    The Office of Basic Energy Sciences (OBES) supports long-range, basic research in those areas of the geosciences which are relevant to the nation's energy needs. The objective of the Geoscience program is to develop a quantitative and predictive understanding of geological, geophysical and geochemical structures and processes in the solid earth and in solar-terrestrial relationships. This understanding is to assure an effective knowledge base for energy resource recognition, evaluation and utilization in an environmentally acceptable manner. The work is carried out primarily in DOE laboratories and in universities, although some is conducted by other federal agencies and by the National Academy of Sciences. Principal areas of interest include: Geology, Geophysics, and Earth Dynamics; Geochemistry; Energy Resource Recognition, Evaluation and Utilization; Hydrologic and Marine Sciences; and Solar-Terrestrial/Atmospheric Interactions.

  2. RESEARCH QUARTERLY

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    RESEARCH QUARTERLY First Quarter 2015 Th 90 Ac 89 Pa 91 U 92 Np 93 Pu 94 Am 95 Cm 96 Bk 97 Cf 98 Es 99 Fm 100 Md 101 No 102 Lr 103 Glenn T. Seaborg Institute for Transactinium Science/Los Alamos National Laboratory Actinide Research Quarterly About the cover The crystalline structure of plutonium in its elemental form, and in molecules and compounds with other elements, is the basis for understanding the intriguing chemistry, physics, and engineering of plutonium molecules and compounds. Colored

  3. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ARM Measurements Validate New Satellite Multilayer Cloud Remote Sensing Method Submitter: Minnis, P., NASA - Langley Research Center Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Properties Journal Reference: Huang, J., P. Minnis, B. Lin, Y. Yi, T.-F. Fan, S. Sun-Mack, and J. K. Ayers, 2006: Determination of ice water path in ice-over-water cloud systems using combined MODIS and AMSR-E measurements. Geophys. Res. Lett., 33, L21801, 10.1029/2006GL027038. Minnis,

  4. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ARM M-PACE Data Used to Evaluate and Improve Arctic Mixed-Phase Clouds Simulated in Climate Models Download a printable PDF Submitter: Xie, S., Lawrence Livermore National Laboratory Area of Research: General Circulation and Single Column Models/Parameterizations Working Group(s): Cloud Modeling Journal Reference: Xie, S, J Boyle, SA Klein, X Liu, and S Ghan. 2008. "Simulations of Arctic mixed-phase clouds in forecasts with CAM3 and AM2 for M-PACE." Journal of Geophysical Research 113,

  5. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Long-Term Observations of Convective Boundary Layer Using Insect Returns at SGP Download a printable PDF Submitter: Chandra, A. S., McGill University Area of Research: Vertical Velocity Working Group(s): Cloud Life Cycle Journal Reference: Chandra AS, P Kollias, SE Giangrande, and SA Klein. 2010. "Long-term observations of the convective boundary layer using insect radar returns at the SGP ARM Climate Research Facility." Journal of Climate, 23, 5699-5714. Example of time-height mapping

  6. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Improving the Treatment of Radiation in Climate Models Download a printable PDF Submitter: Delamere, J. S., Tech-X Corporation Area of Research: Radiation Processes Working Group(s): Aerosol Life Cycle, Cloud Life Cycle Journal Reference: Delamere JS, SA Clough, VH Payne, EJ Mlawer, DD Turner, and RR Gamache. 2010. "A far-infrared radiative closure study in the Arctic: Application to water vapor." Journal of Geophysical Research - Atmospheres, 115, D17106, 10.1029/2009JD012968. The

  7. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Predicting Arctic Sea Ice Loss Download a printable PDF Submitter: Liu, X., University of Wyoming Area of Research: Cloud-Aerosol-Precipitation Interactions Working Group(s): Cloud-Aerosol-Precipitation Interactions Journal Reference: Liu X, S Xie, J Boyle, SA Klein, X Shi, Z Wang, W Lin, SJ Ghan, M Earle, PS Liu, and A Zelenyuk. 2011. "Testing cloud microphysics parameterizations in NCAR CAM5 with ISDAC and M-PACE observations." Journal of Geophysical Research, 116, D00T11,

  8. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Effect of Dry Deposition of Condensable Organic Vapors on SOA Formation in the Urban Plume Download a printable PDF Submitter: Hodzic, A., NCAR Area of Research: Aerosol Processes Working Group(s): Aerosol Life Cycle Journal Reference: Hodzic A, S Madronich, B Aumont, J Lee-Taylor, T Karl, M Camredon, and C Mouchel-Vallon. 2014. "Limited influence of dry deposition of semi-volatile organic vapors on secondary organic aerosol formation in the urban plume." Geophysical Research Letters,

  9. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Climate Warming Due to Soot and Smoke? Maybe Not. Submitter: Penner, J. E., University of Michigan Area of Research: Aerosol Properties Working Group(s): Aerosol Journal Reference: Penner, J.E., S.Y. Zhang, and C.C. Chuang, Soot and smoke aerosol may not warm climate, J. Geophys. Res., 108(D21), 4657, doi:10.1029/2003JD003409, 2003. New research results from the Department of Energy's Atmospheric Radiation Measurement (ARM) Program suggest that fossil fuel soot emissions and biomass smoke may

  10. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ARM Program Achieves Milestone in Global Cloud Properties Research Submitter: Revercomb, H. E., University of Wisconsin, Madison Area of Research: Radiation Processes Working Group(s): Radiative Processes Journal Reference: Knuteson, R.O., Best, F.A., Dedecker, R.G., Feltz, W.F., Revercomb, H.E., and Tobin, D.C., 2004: "10 Years of AERI Data from the DOE ARM Southern Great Plains Site," In Proceedings from the Fourteenth ARM Science Team Meeting, U.S. Department of Energy,Washington,

  11. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Dust Takes Detour on Ice-Cloud Journey Download a printable PDF Submitter: Kulkarni, G., Pacific Northwest National Laboratory Area of Research: Aerosol Processes Working Group(s): Aerosol Life Cycle Journal Reference: Kulkarni G, C Sanders, K Zhang, X Liu, and C Zhao. 2014. "Ice nucleation of bare and sulfuric acid-coated mineral dust particles and implication for cloud properties." Journal of Geophysical Research - Atmospheres, 119(16), doi:10.1002/2014JD021567. Cirrus clouds are

  12. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    DCS Ice Cloud Microphysical Properties Derived from Aircraft Data During MC3E Submitter: Dong, X., University of North Dakota Area of Research: Cloud Processes Working Group(s): Cloud Life Cycle Journal Reference: Wang J, X Dong, and B Xi. 2015. "Investigation of ice cloud microphysical properties of DCSs using aircraft in situ measurements during MC3E over the ARM SGP site." Journal of Geophysical Research - Atmospheres, 120(8), 3533-3552. Figure 1. The observed PSDs at different

  13. Errvironmentaf Research

    Office of Legacy Management (LM)

    online at www.sciencedirect.com Environmental Research 10 1 (2006) 3 4 4 1 Errvironmentaf Research Do scientists and fishermen collect the same size fish? Possible implications for exposure assessment Joanna urger^^^^', Michael ~ o c h f e l d ~ ~ ~ , Sean Christian W. ~ e i t n e r ~ . ~ , Stephen ~ e w e t t ~ , Daniel SnigarofP, Ronald snigarofff, Tim Starnrng, Shawn ~ a r ~ e f , Max ~ o b e r ~ * , Heloise chenelotd, Robert patrickh, Conrad D. volzi, James ~ e s t o d 'Division of Life

  14. Postdoctoral Research Awards Annual Research Meeting: Joseph...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Joseph Mondloch Postdoctoral Research Awards Annual Research Meeting: Joseph Mondloch Postdoctoral Research Awards Annual Research Meeting: Joseph Mondloch poster presentation. PDF ...

  15. Postdoctoral Research Awards Annual Research Meeting: Padmaja...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Padmaja Gunda Postdoctoral Research Awards Annual Research Meeting: Padmaja Gunda Poster Presentation at 2012 EERE Annual Research Meeting, Postdoctoral Research Awards, from the ...

  16. Postdoctoral Research Awards Annual Research Meeting: Brandon...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Brandon Mercado Postdoctoral Research Awards Annual Research Meeting: Brandon Mercado Poster Presentation at 2012 EERE Annual Research Meeting, Postdoctoral Research Awards, from ...

  17. DOE-STD-1153-2002; A Graded Approach for Evaluating Radiation Doses to Aquatic and Terrestrial Biota

    Office of Environmental Management (EM)

    3 METHODS DERIVATION MODULE 3: METHODS DERIVATION DOE-STD-1153-2002 INTENTIONALLY BLANK DOE-STD-1153-2002 M3-1 1 Introduction and Basis for the Approach The Department of Energy (DOE) currently has in place a radiation dose limit of 1 rad/d (10 mGy/d) for the protection of aquatic organisms (DOE Order 5400.5), and has proposed dose limits for both aquatic and terrestrial organisms. These limits are: 1 rad/d (10 mGy/d) for aquatic animals; 1 rad/d (10 mGy/d) for terrestrial plants; and 0.1 rad/d

  18. Summaries of FY 92 geosciences research

    SciTech Connect (OSTI)

    Not Available

    1992-12-01

    The Department of Energy supports research in the geosciences in order to provide a sound foundation of fundamental knowledge in those areas of the geosciences that are germane to the Department of Energy's many missions. The Division of Engineering and Geosciences, part of the Office of Basic Energy Sciences of the Office of Energy Research, supports the Geosciences Research Program. The participants in this program include Department of Energy laboratories, academic institutions, and other governmental agencies. These activities are formalized by a contract or grant between the Department of Energy and the organization performing the work, providing funds for salaries, equipment, research materials, and overhead. The summaries in this document, prepared by the investigators, describe the scope of the individual programs. The Geosciences Research Program includes research in geophysics, geochemistry, resource evaluation, solar-terrestrial interactions and their subdivisions including Earth dynamics, properties of Earth materials, rock mechanics, underground imaging, rock-fluid interactions, continental scientific drilling, geochemical transport, solar/atmospheric physics, and modeling, with emphasis on the interdisciplinary areas. All such research is related either directly or indirectly to the Department of Energy's long-range technological needs.

  19. Summaries of FY 91 geosciences research

    SciTech Connect (OSTI)

    Not Available

    1991-11-01

    The Department of Energy supports research in the geosciences in order to provide a sound foundation of fundamental knowledge in those areas of the geosciences which are germane to the Department of Energy's many missions. The Division of Engineering and Geosciences, part of the Office of Basic Energy Sciences of the Office of Energy Research supports the Geosciences Research Program. The participants in this program include Department of Energy laboratories, academic institutions, and other governmental agencies. Theses activities are formalized by a contract or grant between the Department of Energy and the organization performing the work, providing funds for salaries, equipment, research materials, and overhead. The summaries in this document, prepared by the investigators, describe the scope of the individual programs. The Geosciences Research Program includes research in geology, petrology, geophysics, geochemistry, solar physics, solar-terrestrial relationships, aeronomy, seismology, and natural resource modeling and analysis, including their various subdivisions and interdisciplinary areas. All such research is related either directly or indirectly to the Department of Energy's long-range technological needs. 2 tabs.

  20. North America's net terrestrial CO2 exchange with the atmosphere 19902009

    SciTech Connect (OSTI)

    King, Anthony W.; Andres, Robert; Davis, Kenneth J.; Hafer, M.; Hayes, Daniel J.; Huntzinger, Deborah N.; de Jong, Bernardus; Kurz, Werner; McGuire, A. David; Vargas, Rodrigo; Wei, Yaxing; West, Tristram O.; Woodall, Chris W.

    2015-01-21

    Scientific understanding of the global carbon cycle is required for developing national and international policy to mitigate fossil fuel CO2 emissions by managing terrestrial carbon uptake. Toward that understanding and as a contribution to the REgional Carbon Cycle Assessment and Processes (RECCAP) project, this paper provides a synthesis of net landatmosphere CO2 exchange for North America (Canada, United States, and Mexico) over the period 19902009. Only CO2 is considered, not methane or other greenhouse gases. This synthesis is based on results from three different methods: atmospheric inversion, inventory-based methods and terrestrial biosphere modeling. All methods indicate that the North American land surface was a sink for atmospheric CO2, with a net transfer from atmosphere to land. Estimates ranged from -890 to -280 Tg C yr-1, where the mean of atmospheric inversion estimates forms the lower bound of that range (a larger land sink) and the inventory-based estimate using the production approach the upper (a smaller land sink). This relatively large range is due in part to differences in how the approaches represent trade, fire and other disturbances and which ecosystems they include. Integrating across estimates, \\"best\\" estimates (i.e., measures of central tendency) are -472 281 Tg C yr-1 based on the mean and standard deviation of the distribution and -360 Tg C yr-1 (with an interquartile range of -496 to -337) based on the median. Considering both the fossil fuel emissions source and the land sink, our analysis shows that North America was, however, a net contributor to the growth of CO2 in the atmosphere in the late 20th and early 21st century. With North America's mean annual fossil fuel CO2 emissions for the period 19902009 equal to 1720 Tg C yr-1 and assuming the estimate of -472 Tg C yr-1 as an approximation of the true terrestrial CO2 sink, the continent's source : sink ratio for this time period was 1720:472, or nearly 4:1.

  1. North America's net terrestrial CO2 exchange with the atmosphere 1990–2009

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    King, Anthony W.; Andres, Robert; Davis, Kenneth J.; Hafer, M.; Hayes, Daniel J.; Huntzinger, Deborah N.; de Jong, Bernardus; Kurz, Werner; McGuire, A. David; Vargas, Rodrigo; et al

    2015-01-21

    Scientific understanding of the global carbon cycle is required for developing national and international policy to mitigate fossil fuel CO2 emissions by managing terrestrial carbon uptake. Toward that understanding and as a contribution to the REgional Carbon Cycle Assessment and Processes (RECCAP) project, this paper provides a synthesis of net land–atmosphere CO2 exchange for North America (Canada, United States, and Mexico) over the period 1990–2009. Only CO2 is considered, not methane or other greenhouse gases. This synthesis is based on results from three different methods: atmospheric inversion, inventory-based methods and terrestrial biosphere modeling. All methods indicate that the North Americanmore » land surface was a sink for atmospheric CO2, with a net transfer from atmosphere to land. Estimates ranged from -890 to -280 Tg C yr-1, where the mean of atmospheric inversion estimates forms the lower bound of that range (a larger land sink) and the inventory-based estimate using the production approach the upper (a smaller land sink). This relatively large range is due in part to differences in how the approaches represent trade, fire and other disturbances and which ecosystems they include. Integrating across estimates, \\"best\\" estimates (i.e., measures of central tendency) are -472 ± 281 Tg C yr-1 based on the mean and standard deviation of the distribution and -360 Tg C yr-1 (with an interquartile range of -496 to -337) based on the median. Considering both the fossil fuel emissions source and the land sink, our analysis shows that North America was, however, a net contributor to the growth of CO2 in the atmosphere in the late 20th and early 21st century. With North America's mean annual fossil fuel CO2 emissions for the period 1990–2009 equal to 1720 Tg C yr-1 and assuming the estimate of -472 Tg C yr-1 as an approximation of the true terrestrial CO2 sink, the continent's source : sink ratio for this time period was 1720:472, or nearly 4:1.« less

  2. Subsurface Uranium Fate and Transport: Integrated Experiments and Modeling of Coupled Biogeochemical Mechanisms of Nanocrystalline Uraninite Oxidation by Fe(III)-(hydr)oxides - Project Final Report

    SciTech Connect (OSTI)

    Peyton, Brent M. [Montana State University; Timothy, Ginn R. [University of California Davis; Sani, Rajesh K. [South Dakota School of Mines and Technology

    2013-08-14

    Subsurface bacteria including sulfate reducing bacteria (SRB) reduce soluble U(VI) to insoluble U(IV) with subsequent precipitation of UO2. We have shown that SRB reduce U(VI) to nanometer-sized UO2 particles (1-5 nm) which are both intra- and extracellular, with UO2 inside the cell likely physically shielded from subsequent oxidation processes. We evaluated the UO2 nanoparticles produced by Desulfovibrio desulfuricans G20 under growth and non-growth conditions in the presence of lactate or pyruvate and sulfate, thiosulfate, or fumarate, using ultrafiltration and HR-TEM. Results showed that a significant mass fraction of bioreduced U (35-60%) existed as a mobile phase when the initial concentration of U(VI) was 160 M. Further experiments with different initial U(VI) concentrations (25 - 900 ?M) in MTM with PIPES or bicarbonate buffers indicated that aggregation of uraninite depended on the initial concentrations of U(VI) and type of buffer. It is known that under some conditions SRB-mediated UO2 nanocrystals can be reoxidized (and thus remobilized) by Fe(III)-(hydr)oxides, common constituents of soils and sediments. To elucidate the mechanism of UO2 reoxidation by Fe(III) (hydr)oxides, we studied the impact of Fe and U chelating compounds (citrate, NTA, and EDTA) on reoxidation rates. Experiments were conducted in anaerobic batch systems in PIPES buffer. Results showed EDTA significantly accelerated UO2 reoxidation with an initial rate of 9.5?M day-1 for ferrihydrite. In all cases, bicarbonate increased the rate and extent of UO2 reoxidation with ferrihydrite. The highest rate of UO2 reoxidation occurred when the chelator promoted UO2 and Fe(III) (hydr)oxide dissolution as demonstrated with EDTA. When UO2 dissolution did not occur, UO2 reoxidation likely proceeded through an aqueous Fe(III) intermediate as observed for both NTA and citrate. To complement to these laboratory studies, we collected U-bearing samples from a surface seep at the Rifle field site and have measured elevated U concentrations in oxic iron-rich sediments. To translate experimental results into numerical analysis of U fate and transport, a reaction network was developed based on Sani et al. (2004) to simulate U(VI) bioreduction with concomitant UO2 reoxidation in the presence of hematite or ferrihydrite. The reduction phase considers SRB reduction (using lactate) with the reductive dissolution of Fe(III) solids, which is set to be microbially mediated as well as abiotically driven by sulfide. Model results show the oxidation of HS by Fe(III) directly competes with UO2 reoxidation as Fe(III) oxidizes HS preferentially over UO2. The majority of Fe reduction is predicted to be abiotic, with ferrihydrite becoming fully consumed by reaction with sulfide. Predicted total dissolved carbonate concentrations from the degradation of lactate are elevated (log(pCO2) ~ 1) and, in the hematite system, yield close to two orders-of-magnitude higher U(VI) concentrations than under initial carbonate concentrations of 3 mM. Modeling of U(VI) bioreduction with concomitant reoxidation of UO2 in the presence of ferrihydrite was also extended to a two-dimensional field-scale groundwater flow and biogeochemically reactive transport model for the South Oyster site in eastern Virginia. This model was developed to simulate the field-scale immobilization and subsequent reoxidation of U by a biologically mediated reaction network.

  3. Terrestrial Carbon Management Data from the Carbon Dioxide Information Analysis Center (CDIAC)

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    CDIAC products are indexed and searchable through a customized interface powered by ORNL's Mercury search engine. Products include numeric data packages, publications, trend data, atlases, and models and can be searched for by subject area, keywords, authors, product numbers, time periods, collection sites, spatial references, etc. Some of the collections may also be included in the CDIAC publication Trends Online: A Compendium of Global Change Data. Most data sets, many with numerous data files, are free to download from CDIAC's ftp area. Collections under the broad heading of Terrestrial Carbon Management are organized as Carbon Accumulation with Cropland Management, Carbon Accumulation with Grassland Management, Carbon Loss Following Cultivation, Carbon Accumulation Following Afforestation, and Carbon Sources and Sinks Associated with U.S. Cropland Production.

  4. Comparative genomic analysis of the thermophilic biomass-degrading fungi Myceliophthora thermophila and Thielavia terrestris

    SciTech Connect (OSTI)

    Berka, Randy M.; Grigoriev, Igor V.; Otillar, Robert; Salamov, Asaf; Grimwood, Jane; Reid, Ian; Ishmael, Nadeeza; John, Tricia; Darmond, Corinne; Moisan, Marie-Claude; Henrissat, Bernard; Coutinho, Pedro M.; Lombard, Vincent; Natvig, Donald O.; Lindquist, Erika; Schmutz, Jeremy; Lucas, Susan; Harris, Paul; Powlowski, Justin; Bellemare, Annie; Taylor, David; Butler, Gregory; de Vries, Ronald P.; Allijn, Iris E.; van den Brink, Joost; Ushinsky, Sophia; Storms, Reginald; Powell, Amy J.; Paulsen, Ian T.; Elbourne, Liam D. H.; Baker, Scott. E.; Magnuson, Jon; LaBoissiere, Sylvie; Clutterbuck, A. John; Martinez, Diego; Wogulis, Mark; Lopez de Leon, Alfredo; Rey, Michael W.; Tsang, Adrian

    2011-05-16

    Thermostable enzymes and thermophilic cell factories may afford economic advantages in the production of many chemicals and biomass-based fuels. Here we describe and compare the genomes of two thermophilic fungi, Myceliophthora thermophila and Thielavia terrestris. To our knowledge, these genomes are the first described for thermophilic eukaryotes and the first complete telomere-to-telomere genomes for filamentous fungi. Genome analyses and experimental data suggest that both thermophiles are capable of hydrolyzing all major polysaccharides found in biomass. Examination of transcriptome data and secreted proteins suggests that the two fungi use shared approaches in the hydrolysis of cellulose and xylan but distinct mechanisms in pectin degradation. Characterization of the biomass-hydrolyzing activity of recombinant enzymes suggests that these organisms are highly efficient in biomass decomposition at both moderate and high temperatures. Furthermore, we present evidence suggesting that aside from representing a potential reservoir of thermostable enzymes, thermophilic fungi are amenable to manipulation using classical and molecular genetics.

  5. Estimated dose to man from uranium milling via the terrestrial food-chain pathway

    SciTech Connect (OSTI)

    Rayno, D.R.

    1982-01-01

    One of the major pathways of radiological exposure to man from uranium milling operations is through the terrestrial food chain. Studies by various investigators have shown the extent of uptake and distribution of U-238, U-234, Th-230, Ra-226, Pb-210, and Po-210 in plants and animals. These long-lived natural radioisotopes, all nuclides of the uranium decay series, are found in concentrated amounts in uranium mill tailings. Data from these investigations are used to estimate the dose to man from consumption of beef and milk contaminated by the tailings. This dose estimate from this technologically enhanced source is compared with that from average normal dietary intake of these radionuclides from natural sources.

  6. The sensitivity of the terrestrial biosphere to climatic change: A simulation of the middle Holocene

    SciTech Connect (OSTI)

    Foley, J.A.

    1994-12-01

    A process-based ecosystem model, DEMETER, is used to simulate the sensitivity of the terrestrial biosphere to changes in climate. In this study, DEMETER is applied to the two following climatic regimes: (1) the modern observed climate and (2) a simulated mid-Holocene climate (6000 years before present). The mid-Holocene climate is simulated using the GENESIS global climate model, where shifts in the Earth`s orbital parameters result in warmer northern continents and enhanced monsoons in Asia, North Africa, and North America. DEMETER simulates large differences between modern and mid-Holocene vegetation cover: (1) mid-Holocene boreal forests extend farther poleward than present in much of Europe, Asia, and North America, and (2) mid-Holocene North African grasslands extend substantially farther north than present. The simulated patterns of mid-Holocene vegetation are consistent with many features of the paleobotanical record. Simulated mid-Holocene global net primary productivity is approximately 3% larger than present, largely due to the increase of boreal forest and tropical grasslands relative to tundra and desert. Global vegetation carbon is higher at 6 kyr B.P. compared to present by roughly the same amount (4%). Mid-Holocene global litter carbon is larger than present by 10%, while global soil carbon is approximately 1% less. Despite the regional changes in productivity and carbon storage the simulated total carbon storage potential of the terrestrial biosphere (not including changes in peat) does not change significantly between the two simulations. 53 refs., 12 figs., 4 tabs.

  7. North America's net terrestrial carbon exchange with the atmosphere 1990-2009

    SciTech Connect (OSTI)

    King, Anthony W.; Andres, Robert; Davis, Kenneth J.; Hafer, M.; Hayes, Daniel J.; Huntzinger, Deborah N.; de Jong, Bernardus; Kurz, Werner; McGuire, A. David; Vargas, Rodrigo; Wei, Yaxing; West, Tristram O.; Woodall, Chris W.

    2015-01-01

    Scientific understanding of the global carbon cycle is required for developing national and international policy to mitigate fossil-fuel CO2 emissions by managing terrestrial carbon uptake. Toward that understanding and as a contribution to the REgional Carbon Cycle Assessment and Processes (RECCAP) project, this paper provides a synthesis of net land-atmosphere CO2 exchange for North America over the period (1990-2009). This synthesis is based on results from three different methods: atmospheric inversion, inventory-based methods and terrestrial biosphere modeling. All methods indicate that the North America land surface was a sink for atmospheric CO2, with a net transfer from atmosphere to land. Estimates ranged from -890 to -280 Tg C yr-1, where the atmospheric inversion estimate forms the lower bound of that range (a larger land-sink) and the inventory-based estimate the upper (a smaller land sink). Integrating across estimates, a best estimates (i.e., measures of central tendency) are -472 281 Tg C yr-1 based on the mean and standard deviation of the distribution and -360 Tg C yr-1 (with an interquartile range of -496 to -337) based on the median. Considering both the fossil-fuel emissions source and the land sink, our analysis shows that North America was, however, a net contributor to the growth of CO2 in the atmosphere in the late 20th and early 21st century. The continents CO2 source to sink ratio for this time period was likely in the range of 4:1 to 3:1.

  8. ARM - Funded Research Proposals

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    Research Proposals Science Research Themes Research Highlights Journal Articles Collaborations Atmospheric System Research (ASR) Earth System Modeling Regional &...

  9. Research Highlight

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    The Vertical Structure of Cloud Radiative Forcing at the ACRF SGP Revealed by 8 Years of Continuous Measurements Submitter: Mace, G., University of Utah Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Modeling, Cloud Properties Journal Reference: Accepted to Journal of Climate, 2007. Figure 1. Cloud occurrence, coverage, radiative forcing, and radiation effects over a composite annual cycle that is derived by averaging all observations collected during a

  10. Research Highlight

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    A Climatology of Midlatitude Continental Cloud Properties and Their Impact on the Surface Radiation Budget Submitter: Dong, X., University of North Dakota Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Properties Journal Reference: Dong, X., P. Minnis, and B. Xi, 2005: A climatology of midlatitude continental clouds from ARM SGP site. Part I: Low-level Cloud Macrophysical, microphysical and radiative properties. J. Climate. 18, 1391-1410. Dong, X., B. Xi, and P.

  11. Research Highlight

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    Raman Lidar Observations of Aerosol Humidification Near Clouds Submitter: Ferrare, R. A., NASA LaRC Area of Research: Aerosol Properties Working Group(s): Aerosol Journal Reference: Ferrare, R., et al., Evaluation of Daytime Measurements of Aerosols and Water Vapor Made by an Operational Raman Lidar over the Southern Great Plains, J. Geophys. Res., 111, D05S08, doi:10.1029/2005JD005836, 2006. Relative humidity profiles derived from the Raman lidar during the ALIVE 2005 field experiment. Aerosol

  12. Research Highlight

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    Modification of the Atmospheric Boundary Layer by a Small Island: Observations from Nauru Submitter: Long, C. N., NOAA Global Monitoring Division/CIRES Area of Research: Cloud Distributions/Characterizations Working Group(s): Radiative Processes Journal Reference: Matthews, S., J. M. Hacker, J. Cole, J. Hare, C. N. Long, and R. M. Reynolds, (2007): Modification of the atmospheric boundary layer by a small island: observations from Nauru, MWR, Vol. 135, No. 3, pages 891–905. Figure 1.

  13. Research Highlight

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    Can Ice-Nucleating Aerosols Affect Arctic Seasonal Climate? Submitter: Prenni, A. J., Colorado State University Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Properties Journal Reference: Prenni, A. J., J. Y. Harrington, M. Tjernstrom, P. J. DeMott, A. Avramov, C. N. Long, S. M. Kreidenweis, P. Q. Olsson, and J. Verlinde, (2006): Can Ice-Nucleating Aerosols Affect Arctic Seasonal Climate?, BAMS, Vol.88, Iss. 4; pg. 541-550. ACIA, 2004: Impacts of a Warming

  14. Research Highlight

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    Study Aerosol Humidity Effects Using the ARM Measurements Submitter: Li, Z., University of Maryland Area of Research: Radiation Processes Working Group(s): Aerosol Journal Reference: Jeong, M.-J., Z. Li, E. Andrews, and S.-C. Tsay (2007). Effect of aerosol humidification on the column aerosol optical thickness over the Atmospheric Radiation Measurement Southern Great Plains site, J. Geophys. Res., 112, D10202, doi:10.1029/2006JD007176. (a)-(j) Column-mean aerosol humidification factor as

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    Using Doppler Radar to Characterize Cloud Parameters Download a printable PDF Submitter: Kogan, Y., University of Oklahoma - CIMMS Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Modeling Journal Reference: Kogan, Y.L., Z. N. Kogan, and D. B. Mechem, 2007: Assessing the errors of microphysical retrievals in Marine Stratocumulus based on Doppler radar parameters, J. Hydrometeorol., GEWEX special issue, 8, 665-677. Figure 1. The errors of drizzle flux R retrieval

  16. Research Highlight

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    The Significance of Multilayer Cloud Systems in Tropical Convection Download a printable PDF Submitter: Stephens, G. L., Colorado State University Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Properties Journal Reference: Stephens, GL, and NB Wood. 2007. "Properties of tropical convection observed by millimeter-wave radar systems." Monthly Weather Review 135: 821-842. Storm classifications (derived from k-means clustering analysis) applied to MWR

  17. Research Highlight

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    Evaluation of a New Mixed-Phase Cloud Microphysics Parameterization with SCAM, CAPT Forecasts and M-PACE Observations Download a printable PDF Submitter: Liu, X., University of Wyoming Area of Research: General Circulation and Single Column Models/Parameterizations Working Group(s): Cloud Modeling Journal Reference: Liu, X, S Xie, and SJ Ghan. 2007. "Evaluation of a new mixed-Phase cloud microphysics parameterization with the NCAR single column climate model (SCAM) and ARM M-PACE

  18. Research Highlight

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    Optical Depth Measurements by Shadowband Radiometers and Their Uncertainties Download a printable PDF Submitter: Alexandrov, M. D., Columbia University Area of Research: Radiation Processes Working Group(s): Aerosol Journal Reference: Applied Optics, accepted Sept. 2007. Effective offset to measured optical depths due to tilt of 1-degree in different directions. Offset observed in C1 MFRSR AOD relative to Cimel and representative offset due to tilt. Appearance of shading failure and effect on

  19. Research Highlight

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    Mixed-Phase Cloud Vertical Velocities and Dynamical-Microphysical Interactions Download a printable PDF Submitter: Shupe, M., University of Colorado Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Properties Journal Reference: Shupe, MD, P Kollias, M Poellot, and E Eloranta. 2008. "On deriving vertical air motions from cloud radar Doppler spectra." Journal of Atmospheric and Oceanic Technology 25: 547-557. Shupe, MD, P Kollias, POG Persson, and GM

  20. Research Highlight

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    Five-Year Statistics of Shallow Clouds at the ACRF SGP Site Download a printable PDF Submitter: Berg, L., Pacific Northwest National Laboratory Kassianov, E., Pacific Northwest National Laboratory Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Modeling Journal Reference: Berg, LK, and EI Kassianov. 2008. "Temporal variability of fair-weather cumulus statistics at the ARM SGP site." Journal of Climate 21, 3344-3358. Figure 1. Five-year mean ARSCL VAP

  1. Research Highlight

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    ARM QCRad Goes Global Download a printable PDF Submitter: Long, C. N., NOAA Global Monitoring Division/CIRES Area of Research: Radiation Processes Working Group(s): Radiative Processes Journal Reference: Long, CN, and Y Shi. 2008. "An automated quality assessment and control algorithm for surface radiation measurements." The Open Atmospheric Science Journal 2: 23-37, doi: 10.2174/1874282300802010023. Figure: QCRad downwelling (top) and upwelling (bottom) longwave (LW) comparison

  2. Research Highlight

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    Characterizing Mixed-Phase Clouds from the Ground: a Status Report Download a printable PDF Submitter: Shupe, M., University of Colorado Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Properties Journal Reference: Shupe, MD, JS Daniel, G De Boer, EW Eloranta, P Kollias, E Luke, CN Long, DD Turner, and J Verlinde. 2008. "A focus on mixed-phase clouds: The status of ground-ba sed observational methods." Bulletin of the American Meteorological Society,

  3. Research Highlight

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    Cloud Susceptibility Measures Potential Cloud Sensitivity to First Aerosol Indirect Effect Download a printable PDF Submitter: Oreopoulos, L., NASA Platnick, S., NASA - Goddard Space Flight Center Area of Research: Cloud Distributions/Characterizations Working Group(s): Radiative Processes Journal Reference: Platnick, S, and L Oreopoulos. 2008. "Radiative susceptibility of cloudy atmospheres to droplet number perturbations: 1. Theoretical analysis and examples from MODIS." Journal of

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    Assessment of CloudSat Using ARM, AMF, and CloudNet Observations Download a printable PDF Submitter: Protat, A., Australian Bureau of Meterology May, P. T., Bureau of Meteorology O'Connor, E. J., University of Reading Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Properties Journal Reference: Submitted. PDF of cloud reflectivity (upper-left), cloud top height (upper-right), thickness (lower-left), and cloud base height (lower right) as measured by the Darwin

  5. Research Highlight

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    A Simple Algorithm to Find Cloud Optical Depth Applied to Thin Ice Clouds Download a printable PDF Submitter: Barnard, J., University of Nevada Reno Long, C. N., NOAA Global Monitoring Division/CIRES Kassianov, E., Pacific Northwest National Laboratory McFarlane, S. A., U.S. Department of Energy Comstock, J. M., Pacific Northwest National Laboratory Freer, M., University of Illinois, Urbana McFarquhar, G., University of Illinois, Urbana Area of Research: Cloud Distributions/Characterizations

  6. Research Highlight

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    Vertical Variation of Cloud Droplet Size Using Ship and Space-borne R/S Data Download a printable PDF Submitter: Li, Z., University of Maryland Chen, R., University of Maryland Wood, R., University of Washington Chang, F., Science Systems and Applications, Inc. Ferraro, R., NOAA/NESDIS, WWBG Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Properties Journal Reference: Chen, R, R Wood, Z Li, R Ferraro, and F Chang. 2008. "Studying the vertical variation of

  7. Research Highlight

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    Forcing Boundary Layer Cloud Systems with Multi-Dimensional Radiation Download a printable PDF Submitter: Mechem, D. B., University of Kansas Kogan, Y., University of Oklahoma - CIMMS Ovchinnikov, M., Pacific Northwest National Laboratory Davis, A. B., Jet Propulsion Laboratory Evans, F., University of Colorado Ellingson, R. G., Florida State University Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Modeling, Radiative Processes Journal Reference: Mechem, DB, YL

  8. Research Highlight

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    Significant Decadal Brightening over the Continental United States Download a printable PDF Submitter: Long, C. N., NOAA Global Monitoring Division/CIRES Dutton, E. G., NOAA/OAR/ESRL Augustine, J., National Oceanic and Atmospheric Administration Wiscombe, W. J., Brookhaven National Laboratory Wild, M., Institute for Atmospheric and Climate Science - ETH Zurich McFarlane, S. A., U.S. Department of Energy Flynn, C. J., Pacific Northwest National Laboratory Area of Research: Radiation Processes

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    Continuous Clear-Sky Longwave from Surface Measurements Download a printable PDF Submitter: Long, C. N., NOAA Global Monitoring Division/CIRES Turner, D. D., National Oceanic and Atmospheric Administration Area of Research: Radiation Processes Working Group(s): Radiative Processes Journal Reference: Long, CN, and DD Turner. 2008. "A method for continuous estimation of clear-sky downwelling longwave radiative flux developed using ARM surface measurements." Journal of Geophysical

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    Microwave and Millimeter-Wave Radiometric and Radiosonde Observations in an Arctic Environment Download a printable PDF Submitter: Westwater, E. R., University of Colorado Area of Research: Radiation Processes Working Group(s): Radiative Processes Journal Reference: Mattioli V, ER Westwater, D Cimini, AJ Gasiewski, M Klein, and V Leuski. 2008. "Microwave and millimeter-wave radiometric and radiosonde observations in an arctic environment." Journal of Atmospheric and Oceanic Technology,

  11. Research Highlight

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    Ice Nuclei and Global Warming Download a printable PDF Submitter: Zeng, X., Morgan State University GSFC, N., NASA GSFC Zhang, M., Stony Brook University Hou, A., NASA - Goddard Space Flight Center Xie, S., Lawrence Livermore National Laboratory Lang, S. E., NASA - Goddard Space Flight Center Li, X., University of Maryland, Baltimore County Starr, D. O., NASA - Goddard Space Flight Center Area of Research: General Circulation and Single Column Models/Parameterizations Working Group(s): Cloud

  12. Research Highlight

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    Improving the Numerical Simulation of Squall Lines Download a printable PDF Submitter: Morrison, H. C., NCAR Thompson, G., NCAR Tatarskii, V., Georgia Institute of Technology Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Modeling Journal Reference: Morrison HC, G Thompson, and V Tatarskii. 2009. "Impact of cloud microphysics on the development of trailing stratiform precipitation in a simulated squall line: Comparison of one- and two-moment schemes."

  13. Research Highlight

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    CCN Activity and Mixing Rules of Isoprene Secondary Organic Aerosol (SOA) and Sulfate Download a printable PDF Submitter: Martin, S. T., Harvard University Area of Research: Aerosol Properties Working Group(s): Aerosol Life Cycle, Cloud-Aerosol-Precipitation Interactions Journal Reference: King SM, T Rosenoern, JH Shilling, Q Chen, Z Wang, G Biskos, KA McKinney, U Poeschl, and ST Martin. 2010. "Cloud droplet activation of mixed organic-sulfate particles produced by the photooxidation of

  14. Research Highlight

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    Mechanisms Affecting the Transition from Shallow to Deep Convection over Land Download a printable PDF Submitter: Zhang, Y., Lawrence Livermore National Laboratory Area of Research: General Circulation and Single Column Models/Parameterizations Working Group(s): Cloud Life Cycle Journal Reference: Zhang Y and SA Klein. 2010. "Mechanisms affecting the transition from shallow to deep convection over land: Inferences from observations of the diurnal cycle collected at the ARM Southern Great

  15. Research Highlight

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    Impact of Horizontal Resolution on Climate Model Simulations of Tropical Moist Processes Download a printable PDF Submitter: Boyle, J., Lawrence Livermore National Laboratory Klein, S., Lawrence Livermore National Laboratory Area of Research: General Circulation and Single Column Models/Parameterizations Working Group(s): Cloud Life Cycle Journal Reference: Boyle JS and SA Klein. 2010. "Impact of horizontal resolution on climate model forecasts of tropical precipitation and diabatic heating

  16. Research Highlight

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    A New Method for Satellite/Surface Comparisons Download a printable PDF Submitter: Long, C. N., NOAA Global Monitoring Division/CIRES Area of Research: Radiation Processes Working Group(s): Cloud Properties, Radiative Processes Journal Reference: Zhang Y, CN Long, WB Rossow, and EG Dutton. 2010. "Exploiting diurnal variations to evaluate the ISCCP-FD flux calculations and radiative-flux-analysis-processed surface observations from BSRN, ARM, and SURFRAD." Journal of Geophysical

  17. Research Highlight

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    Increased Accuracy for Sky Imager Retrievals Download a printable PDF Submitter: Long, C. N., NOAA Global Monitoring Division/CIRES Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Properties Journal Reference: Long CN. 2010. "Correcting for circumsolar and near-horizon errors in sky cover retrievals from sky images." The Open Atmospheric Science Journal, 4, doi:10.2174/1874282301004010045. Long CN, JM Sabburg, J Calbo, and D Pages. 2006. "Retrieving

  18. Research Highlight

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    A New Bulk Microphysical Scheme That Includes Riming Intensity and Temperature Dependent Ice Ch Download a printable PDF Submitter: Lin, Y., Geophysical Fluid Dynamics Laboratory Area of Research: General Circulation and Single Column Models/Parameterizations Working Group(s): Cloud Life Cycle Journal Reference: Lin Y and BA Colle. 2011. "A new bulk microphysical scheme that includes riming intensity and temperature dependent ice characteristics." Monthly Weather Review, 139(3),

  19. Research Highlight

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    Characterizing Clouds at Arctic Atmospheric Observatories Download a printable PDF Submitter: Shupe, M., University of Colorado Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Life Cycle Journal Reference: Shupe MD, VP Walden, E Eloranta, T Uttal, JR Campbell, SM Starkweather, and M Shiobara. 2011. "Clouds at Arctic atmospheric observatories, part I: occurrence and macrophysical properties." Journal of Applied Meteorology and Climatology, 50(3), 626-644.

  20. Research Highlight

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    A Downwelling Infrared Radiance Climatology for the ARM Southern Great Plains Site Download a printable PDF Submitter: Turner, D. D., National Oceanic and Atmospheric Administration Gero, J., University of Wisconsin Area of Research: Radiation Processes Working Group(s): Cloud Life Cycle Journal Reference: Turner DD and PJ Gero. 2011. "Downwelling infrared radiance temperature climatology for the Atmospheric Radiation Measurement Southern Great Plains site." Journal of Geophysical

  1. Research Highlight

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    Evaluation of CRM Intercomparison Simulations Using TWP-ICE Observations, Part 1 Download a printable PDF Submitter: Varble, A., University of Utah Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Life Cycle Journal Reference: Varble AC, AM Fridlind, EJ Zipser, AS Ackerman, J Chaboureau, J Fan, A Hill, SA McFarlane, J Pinty, and B Shipway. 2011. "Evaluation of cloud-resolving model intercomparison simulations using TWP-ICE observations: Precipitation and cloud

  2. Research Highlight

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    Estimating the Ice Crystal Enhancement Factor in the Tropics Download a printable PDF Submitter: Zeng, X., Morgan State University GSFC, N., NASA GSFC Area of Research: General Circulation and Single Column Models/Parameterizations Working Group(s): Cloud Life Cycle, Cloud-Aerosol-Precipitation Interactions Journal Reference: Zeng X, W Tao, T Matsui, S Xie, S Lang, M Zhang, DO Starr, and X Li. 2011. "Estimating the ice crystal enhancement factor in the tropics." Journal of the

  3. Research Highlight

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    A Consistency Analysis of ARESE Aircraft Measurements Submitter: Li, Z., University of Maryland Area of Research: Radiation Processes Working Group(s): Radiative Processes Journal Reference: Li, Z., A.P. Trishchenko, H.W. Barker, G.L. Stephens, and P. Partain, 1999: "Analyses of Atmospheric Radiation Measurement (ARM) program's Enhanced Shortwave Experiment (ARESE) multiple data sets for studying cloud absorption," J. of Geophys. Res. 104(D16):19127-19134 Figure 1. Comparisons of TOA

  4. Research Highlight

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    Indirect Impact of Atmospheric Aerosols on an Ensemble of Deep Convective Clouds Download a printable PDF Submitter: Grabowski, W., NCAR Morrison, H. C., NCAR Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud-Aerosol-Precipitation Interactions Journal Reference: Grabowski WW and H Morrison. 2011. "Indirect impact of atmospheric aerosols in idealized simulations of convective-radiative quasi-equilibrium. Part II: Double-moment microphysics." Journal of

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    Snow Particle Observations in Arctic Clouds Download a printable PDF Submitter: Morrison, H. C., NCAR Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Life Cycle Journal Reference: Morrison H, P Zuidema, GM McFarquhar, A Bansemer, and AJ Heymsfield. 2011. "Microphysical observations in shallow mixed-phase and deep frontal Arctic cloud systems." Quarterly Journal Royal Meteorological Society, 137(659), doi:10.1002/qj.840. Fitted size distribution intercept

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    Understanding Ice Formation in Arctic Mixed-Phase Boundary-Layer Clouds During ISDAC Download a printable PDF Submitter: Ackerman, A., NASA - Goddard Institute for Space Studies Fridlind, A. M., NASA - Goddard Institute for Space Studies Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud-Aerosol-Precipitation Interactions Journal Reference: Avramov A, AS Ackerman, AM Fridlind, B van Diedenhoven, G Botta, K Aydin, J Verlinde, KV Alexei, W Strapp, GM McFarquhar, R

  7. Research Highlight

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    A Dance of Aerosols Download a printable PDF Submitter: Song, C., Pacific Northwest National Laboratory Area of Research: Aerosol Processes Working Group(s): Aerosol Life Cycle Journal Reference: Song C, RA Zaveri, JE Shilling, ML Alexander, and M Newburn. 2011. "Effect of hydrophilic organic seed aerosols on secondary organic aerosol formation from ozonolysis of α-pinene." Environmental Science & Technology, 45(17), doi:10.1021/es201225c. The injection of alpha-pinene, a

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    Modeling the Sensitivity of Convection to Tropospheric Humidity Download a printable PDF Submitter: Del Genio, A. D., National Aeronautics and Space Administration Area of Research: General Circulation and Single Column Models/Parameterizations Working Group(s): Cloud Life Cycle Journal Reference: Del Genio AD. 2011. "Representing the sensitivity of convective cloud systems to tropospheric humidity in general circulation models." Surveys in Geophysics, , doi:10.1007/s10712-011-9148-9.

  9. Research Highlight

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    What Exactly Do Metrics for Aerosol-Cloud Interactions Represent? Download a printable PDF Submitter: McComiskey, A. C., National Oceanic and Atmospheric Administration Area of Research: Cloud-Aerosol-Precipitation Interactions Working Group(s): Aerosol Life Cycle, Cloud-Aerosol-Precipitation Interactions Journal Reference: McComiskey A and G Feingold. 2012. "The scale problem in quantifying aerosol indirect effects." Atmospheric Chemistry and Physics, 12, doi:10.5194/acp-12-1031-2012.

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    TOA Radiation Budget of Convective Core/Stratiform Rain/Anvil Clouds from Deep Convection Download a printable PDF Submitter: Feng, Z., Pacific Northwest National Laboratory Dong, X., University of North Dakota Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Life Cycle Journal Reference: Feng Z, XQ Dong, BK Xi, C Schumacher, P Minnis, and M Khaiyer. 2011. "Top-of-atmosphere radiation budget of convective core/stratiform rain and anvil clouds from deep

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    Simulating the Impact of Aerosols on Tropical Deep Convection Download a printable PDF Submitter: Morrison, H. C., NCAR Area of Research: Cloud-Aerosol-Precipitation Interactions Working Group(s): Cloud Life Cycle, Cloud-Aerosol-Precipitation Interactions Journal Reference: Morrison H and WW Grabowski. 2011. "Cloud-system resolving model simulations of aerosol indirect effects on tropical deep convection and its thermodynamic environment." Atmospheric Chemistry and Physics, 11(20),

  12. Research Highlight

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    Unraveling the Complexity of Arctic Mixed-Phase Clouds Download a printable PDF Submitter: Morrison, H. C., NCAR Area of Research: Radiation Processes Working Group(s): Cloud Life Cycle Journal Reference: Morrison H, G de Boer, G Feingold, J Harrington, M Shupe, and K Sulia. 2011. "Resilience of persistent Arctic mixed-phase clouds." Nature Geoscience, 5, doi:10.1038/ngeo1332. A conceptual model that illustrates the primary processes and basic physical structure of persistent Arctic

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    Trends in Downwelling Longwave Radiation over SGP Download a printable PDF Submitter: Gero, J., University of Wisconsin Turner, D. D., National Oceanic and Atmospheric Administration Area of Research: Radiation Processes Working Group(s): Cloud Life Cycle, Cloud-Aerosol-Precipitation Interactions Journal Reference: Gero P and DD Turner. 2011. "Long-term trends in downwelling spectral infrared radiance over the U.S. Southern Great Plains." Journal of Climate, 24(18),

  14. Research Highlight

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    Clouds Get in the Way: How Climate Models Calculate the Effects of Clouds on Earth's Warming Download a printable PDF Submitter: Qian, Y., Pacific Northwest National Laboratory Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Life Cycle Journal Reference: Qian Y, CN Long, H Wang, JM Comstock, SA McFarlane, and S Xie. 2012. "Evaluation of cloud fraction and its radiative effect simulated by IPCC AR4 global models against ARM surface observations."

  15. Research Highlight

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    Spectrally Invariant Approximation Within Atmospheric Radiative Transfer Download a printable PDF Submitter: Marshak, A., NASA - Goddard Space Flight Center Area of Research: Radiation Processes Working Group(s): Cloud-Aerosol-Precipitation Interactions Journal Reference: Marshak A, Y Knyazikhin, JC Chiu, and WJ Wiscombe. 2011. "Spectrally-invariant approximation within atmospheric radiative transfer." Journal of the Atmospheric Sciences, 68(12), doi:10.1175/JAS-D-11-060.1. Ratio of

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    Tropical Rain Clouds Still a Challenge to Cloud-Resolving Models Download a printable PDF Submitter: Fridlind, A. M., NASA - Goddard Institute for Space Studies Ackerman, A., NASA - Goddard Institute for Space Studies Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Life Cycle, Cloud-Aerosol-Precipitation Interactions Journal Reference: Fridlind AM, AS Ackerman, J Chaboureau, J Fan, WW Grabowski, AA Hill, TR Jones, MM Khaiyer, G Liu, P Minnis, H Morrison, L Nguyen,

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    Comparing Global Atmospheric Model Simulations of Tropical Convection Download a printable PDF Submitter: Lin, Y., Geophysical Fluid Dynamics Laboratory Area of Research: General Circulation and Single Column Models/Parameterizations Working Group(s): Cloud Life Cycle Journal Reference: N/A Mean profiles of (first column) total precipitation normalized Q1, (second column) convective precipitation normalized convective heating, (third column) stratiform heating, and (fourth column) convective

  18. Research Highlight

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    Mexico City Carbon-Containing Particle Composition Simulated Download a printable PDF Submitter: Zaveri, R., Pacific Northwest National Laboratory Area of Research: Radiation Processes Working Group(s): Aerosol Life Cycle Journal Reference: Lee-Taylor J, S Madronich, B Aumont, M Camredon, A Hodzic, GS Tyndall, E Aperl, and RA Zaveri. 2012. "Explicit modeling of organic chemistry and secondary organic aerosol partitioning for Mexico City and its outflow plume." Atmospheric Chemistry and

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    Diurnal Cycle of Monsoon Clouds, Precipitation, and Surface Radiation Download a printable PDF Submitter: Long, C. N., NOAA Global Monitoring Division/CIRES May, P. T., Bureau of Meteorology Area of Research: Cloud Processes Working Group(s): Cloud Life Cycle, Cloud-Aerosol-Precipitation Interactions Journal Reference: May PT, CN Long, and A Protat. 2012. "The diurnal cycle of the boundary layer, convection, clouds, and surface radiation in a coastal monsoon environment (Darwin

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    How Aerosols Affect Cloud Properties in Arctic Mixed-Phase Stratocumulus Download a printable PDF Submitter: McFarquhar, G., University of Illinois, Urbana Area of Research: Cloud-Aerosol-Precipitation Interactions Working Group(s): Cloud-Aerosol-Precipitation Interactions Journal Reference: Jackson RC, GM McFarquhar, AV Korolev, ME Earle, PS Liu, RP Lawson, S Brooks, M Wolde, A Laskin, and M Freer. 2012. "The dependence of ice microphysics on aerosol concentration in arctic mixed-phase

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    The Influence of Regional Anthropogenic Emission Reductions on Aerosol Direct Radiative Forcing Download a printable PDF Submitter: Bergmann, D., Lawrence Livermore National Laboratory Area of Research: Radiation Processes Working Group(s): Aerosol Life Cycle Journal Reference: Yu H, M Chin, J West, C Atherton, N Bellouin, D Bergmann, I Bey, H Bian, T Diehl, G Forberth, P Hess, M Schulz, D Shindell, T Takemura, and Q Tan. 2012. "An HTAP multi-model assessment of the influence of regional

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    Measured Radiative Cooling from Reflective Roofs in India Download a printable PDF Submitter: Fischer, M. L., Lawrence Berkeley National Laboratory Area of Research: Radiation Processes Working Group(s): Aerosol Life Cycle, Cloud Life Cycle, Cloud-Aerosol-Precipitation Interactions Journal Reference: Salamanca F, S Tonse, S Menon, V Garg, KP Singh, M Naja, and ML Fischer. 2012. "Top-of-atmosphere radiative cooling with white roofs: Experimental verification and model-based evaluation."

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    Pollution Hitches Ride to Arctic Download a printable PDF Submitter: Zelenyuk-Imre, A., Pacific Northwest National Laboratory Area of Research: Aerosol Properties Working Group(s): Aerosol Life Cycle Journal Reference: Zelenyuk A, D Imre, J Beranek, E Abramson, J Wilson, and M Shrivastava. 2012. "Synergy between secondary organic aerosols and long-range transport of polycyclic aromatic hydrocarbons." Environmental Science & Technology, 46(22), doi:10.1021/es302743z. When airborne

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    2007 Floods Not a Complete Washout in U.S. Great Plains Submitter: Bhattacharya, A., Pacific Northwest National Laboratory Area of Research: Atmospheric Thermodynamics and Vertical Structures Working Group(s): Cloud-Aerosol-Precipitation Interactions Journal Reference: Lamb PJ, DH Portis, and A Zangvil. 2012. "Investigation of Large-Scale Atmospheric Moisture Budget and Land Surface Interactions over U.S. Southern Great Plains including for CLASIC (June 2007)." Journal of

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    Tropical Clouds: from Jekyll to Hyde Submitter: Hagos, S. M., Pacific Northwest National Laboratory Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Life Cycle Journal Reference: Hagos SM and R Leung. 2012. "Large-scale environmental variables and transition to deep convection in cloud resolving model simulations: A vector representation." Journal of Advances in Modeling Earth Systems, 4(M11001), 2012MS000155, doi:10.1029/2012MS000155. The relationship

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    Modeling from a Tropical State of Mind Download a printable PDF Submitter: Del Genio, A. D., National Aeronautics and Space Administration Area of Research: Cloud Processes Working Group(s): Cloud Life Cycle Journal Reference: Mrowiec AA, C Rio, AM Fridlind, AS Ackerman, AD Del Genio, OM Pauluis, AC Varble, and J Fan. 2012. "Analysis of cloud-resolving simulations of a tropical mesoscale convective system observed during TWP-ICE: Vertical fluxes and draft properties in convective and

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    Development and Validation of a Black Carbon Mixing State Resolved Three-Dimensional Model Download a printable PDF Submitter: Fast, J. ., Pacific Northwest National Laboratory Area of Research: Aerosol Processes Working Group(s): Aerosol Life Cycle Journal Reference: Matsui H, M Koike, Y Kondo, N Moteki, JD Fast, and RA Zaveri. 2013. "Development and validation of a black carbon mixing state resolved three-dimensional model: Aging processes and radiative impact." Journal of

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    High and Dry - Probing Greenland's Atmosphere and Clouds Download a printable PDF Submitter: Shupe, M., University of Colorado Turner, D. D., National Oceanic and Atmospheric Administration Area of Research: Cloud Processes Working Group(s): Cloud Life Cycle Journal Reference: Shupe MD, DD Turner, VP Walden, R Bennartz, M Cadeddu, B Castellani, C Cox, D Hudak, M Kulie, N Miller, RR Neely, III, W Neff, and PM Rowe. 2013. "High and Dry: New observations of tropospheric and cloud properties

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    The Mixing State of Carbonaceous Aerosol Particles in Northern and Southern California Measured During CARES and CalNex Download a printable PDF Submitter: Zaveri, R., Pacific Northwest National Laboratory Area of Research: Aerosol Processes Working Group(s): Aerosol Life Cycle Journal Reference: Cahill JF, K Suski, JH Seinfeld, RA Zaveri, and KA Prather. 2012. "The mixing state of carbonaceous aerosol particles in Northern and Southern California measured during CARES and CalNex

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    When Pollution Gets a Whiff of Trees Download a printable PDF Submitter: Shilling, J., Pacific Northwest National Laboratory Area of Research: Aerosol Properties Working Group(s): Aerosol Life Cycle Journal Reference: Shilling JE, RA Zaveri, JD Fast, L Kleinman, M Alexander, MR Canagaratna, E Fortner, JM Hubbe, JT Jayne, A Sedlacek, A Setyan, S Springston, DR Worsnop, and Q Zhang. 2013. "Enhanced SOA formation from mixed anthropogenic and biogenic emissions during the CARES campaign."

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    What Controls the Vertical Extent of Continental Shallow Cumulus? Download a printable PDF Submitter: Zhang, Y., Lawrence Livermore National Laboratory Area of Research: Cloud Processes Working Group(s): Cloud Life Cycle Journal Reference: Zhang Y and SA Klein. 2013. "Factors controlling the vertical extent of fair-weather shallow cumulus clouds over land: investigation of diurnal-cycle observations collected at the ARM Southern Great Plains site." Journal of the Atmospheric Sciences,

  12. Research Highlight

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    Tropical Ice Cloud Simulations Using Scripps Single Column Model (SCM) Reveal Range of Model Uncertainties Submitter: McFarquhar, G., University of Illinois, Urbana Area of Research: General Circulation and Single Column Models/Parameterizations Working Group(s): Cloud Modeling Journal Reference: McFarquhar, G.M., S. Iacobellis, R.C.J. Somerville. SCM Simualtions of Tropical Ice Clouds Using Observationally Based Parameterizations of Microphysics, Journal of Climate: Vol 15, No. 11, pp.

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    An Application of Linear Programming Techniques to ARM Polarimetric Radar Processing Download a printable PDF Submitter: Giangrande, S., Brookhaven National Laboratory Area of Research: Cloud Processes Working Group(s): Cloud Life Cycle Journal Reference: Giangrande SE, R McGraw, and L Lei. 2013. "An application of linear programming to polarimetric radar differential phase processing." Journal of Atmospheric and Oceanic Technology, , . ACCEPTED. C-band scanning ARM precipitation radar

  14. Research Highlight

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    Linking Ice Nucleation to Aerosols and Its Impact on CAM5 Simulated Arctic Clouds and Radiation Download a printable PDF Submitter: Xie, S., Lawrence Livermore National Laboratory Area of Research: General Circulation and Single Column Models/Parameterizations Working Group(s): Cloud Life Cycle Journal Reference: Xie S, X Liu, C Zhao, and Y Zhang. 2013. "Sensitivity of CAM5 simulated arctic clouds and radiation to ice nucleation parameterization." Journal of Climate, 26(16),

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    Wildfires Lead to More Warming Than Climate Models Predict, a New Mexico Fire Study Reports Download a printable PDF Submitter: Bhattacharya, A., Pacific Northwest National Laboratory Area of Research: Aerosol Properties Working Group(s): Aerosol Life Cycle Journal Reference: China S, C Mazzoleni, K Gorkowski, AC Aiken, and MK Dubey. 2013. "Morphology and mixing state of individual freshly emitted wildfire carbonaceous particles." Nature Communications, 4, 2122, doi:10.1038/ncomms3122.

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    Arctic Mixed-phase Clouds Persist with Little Help from the Local Surface Download a printable PDF Submitter: Shupe, M., University of Colorado Area of Research: Cloud Processes Working Group(s): Cloud Life Cycle, Cloud-Aerosol-Precipitation Interactions Journal Reference: Shupe MD, OG Persson, IM Brooks, M Tjernstrom, J Sedlar, T Mauritsen, S Sjogren, and C Leck. 2013. "Cloud and boundary layer interactions over the Arctic sea ice in late summer." Atmospheric Chemistry and Physics,

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    Forecast Calls for Better Models: Examining the Core Components of Arctic Clouds to Clear Their Influence on Climate Download a printable PDF Submitter: Laskin, A., Pacific Northwest National Laboratory Area of Research: Cloud-Aerosol-Precipitation Interactions Working Group(s): Aerosol Life Cycle Journal Reference: Hiranuma N, SD Brooks, RC Moffet, A Glen, A Laskin, MK Gilles, P Liu, AM Macdonald, JW Strapp, and GM McFarquhar. 2013. "Chemical characterization of individual particles and

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    Is Cumulus Drag a Rayleigh Drag? Download a printable PDF Submitter: Romps, D., Lawrence Berkeley National Laboratory Area of Research: Cloud Processes Working Group(s): Cloud Life Cycle Journal Reference: Romps DM. 2013. "Rayleigh damping in the free troposphere." Journal of the Atmospheric Sciences, , . ACCEPTED. Hovmoller diagrams of wind profiles in a large-eddy simulation of deep convection. Note the different damping rates and descent speeds for different wavelengths. In toy

  19. Research Highlight

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    Initial Aerosol Concentration Is Key Contributor to Low-Level Cloud Reflectivity Submitter: Penner, J. E., University of Michigan Area of Research: Aerosol Properties Working Group(s): Aerosol Journal Reference: Penner, J., Dong, X., Chen. Y., Observational evidence of a change in radiative forcing due to the indirect aerosol effect, Nature, Vol. 427, 15 January 2004. Cloud optical depth, as determined from the parcel model, is indicated by the dots. Red lines show best fit data of cloud liquid

  20. Research Highlight

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    Evaluation of Gridded SACR Reflectivity Observations and Vertical Doppler Velocity Retrievals Download a printable PDF Submitter: Lamer, K., Pennsylvania State University Kollias, P., Stony Brook University Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Life Cycle Journal Reference: Lamer K, A Taterevic, I Jo, and P Kollias. 2013. "Evaluation of gridded Scanning ARM Cloud Radar reflectivity observations and vertical Doppler velocity retrievals."

  1. Research Highlight

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    Improving Estimates of Cloud Condensation Nuclei Concentration Download a printable PDF Submitter: Li, Z., University of Maryland Area of Research: Cloud-Aerosol-Precipitation Interactions Working Group(s): Cloud-Aerosol-Precipitation Interactions Journal Reference: Liu J and Z Li. 2014. "Estimation of cloud condensation nuclei concentration from aerosol optical quantities: influential factors and uncertainties." Atmospheric Chemistry and Physics, 14(1), doi:10.5194/acp-14-1-2014.

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    Reality Check: Estimates for Human-Caused Methane Emissions in the U.S. Appear Off by 50% Download a printable PDF Submitter: Biraud, S. C., Lawrence Berkeley National Laboratory Area of Research: Aerosol Properties Working Group(s): Aerosol Life Cycle Journal Reference: Miller SM, SC Wofsy, AM Michalak, EA Kort, AE Andrews, SC Biraud, EJ Dlugokencky, J Elszkeiwicz, ML Fischer, G Janssens-Maenhout, BR Miller, JB Miller, SA Montzka, T Nehrkorn, and C Sweeney. 2013. "Anthropogenic emissions

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    Multi-scale Variations of Decade-long Cloud Fractions from Six Different Platforms over the SGP Download a printable PDF Submitter: Wu, W., Brookhaven National Laboratory Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Life Cycle Journal Reference: Wu W, Y Liu, MP Jensen, T Toto, MJ Foster, and CN Long. 2014. "A comparison of multiscale variations of decade-long cloud fractions from six different platforms over the Southern Great Plains in the United

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    Turbulent Entrainment-Mixing Processes in Cumuli Download a printable PDF Submitter: Liu, Y., Brookhaven National Laboratory Area of Research: Cloud Processes Working Group(s): Cloud Life Cycle Journal Reference: Lu C, Y Liu, and S Niu. 2014. "Entrainment mixing parameterization in shallow cumuli and effects of secondary mixing events." Chinese Science Bulletin, 59(9), doi:10.1007/s11434-013-0097-1. Relationships between homogeneous mixing degree (ψ3) and two transition scale numbers

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    Scientists Uncover Combustion Mechanism to Better Predict Warming by Wildfires Download a printable PDF Submitter: Dubey, M. K., Los Alamos National Laboratory Donahue, N., Carnegie Mellon University Area of Research: Radiation Processes Working Group(s): Aerosol Life Cycle Journal Reference: Saleh R, E Robinson, D Tkacik, A Ahern, S Liu, A Aiken, R Sullivan, A Presto, M Dubey, R Yokelson, N Donahue, and A Robinson. 2014. "Brownness of organics in aerosols from biomass burning linked to

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    Phase State and Physical Properties of Ambient and Lab Generated Aerosols: X-ray Microscopy Download a printable PDF Submitter: OBrien, R. E., Lawrence Berkeley National Laboratory Gilles, M., Lawrence Berkeley National Laboratory Area of Research: Aerosol Properties Working Group(s): Aerosol Life Cycle Journal Reference: O'Brien RE, A Neu, SA Epstein, AC MacMillan, B Wang, ST Kelly, SA Nizkorodov, A Laskin, RC Moffet, and MK Gilles. 2014. "Physical properties of ambient and

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    Parameterization of Vertical Velocity in Shallow Convections Download a printable PDF Submitter: Zhang, M., Stony Brook University Area of Research: Vertical Velocity Working Group(s): Cloud Life Cycle Journal Reference: Wang X and M Zhang. 2014. "Vertical velocity in shallow convection for different plume types." Journal of Advances in Modeling Earth Systems, 6(2), doi:10.1002/2014MS000318. Mean profiles of vertical velocity in convective cores (red); convective updrafts (blue); and

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    Turn Trash Into Treasure: Continental Warm Cloud Properties Derived from Unexploited Solar Background Signals Download a printable PDF Submitter: Chiu, J., University of Reading Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Life Cycle, Cloud-Aerosol-Precipitation Interactions Journal Reference: Chiu JC, JA Holmes, RJ Hogan, and EJ O'Connor. 2014. "The interdependence of continental warm cloud properties derived from unexploited solar background signals in

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    A New Theory of Time-dependent Freezing and Its Application to Investigation of Formation of Hail Download a printable PDF Submitter: Khain, A., The Hebrew University of Jerusalem Phillips, V., University of Leeds Area of Research: Cloud Processes Working Group(s): Cloud-Aerosol-Precipitation Interactions Journal Reference: Phillips VT, A Khain, N Benmoshe, E Ilotoviz, and A Ryzhkov. 2014. "Theory of time-dependent freezing. II: Scheme for freezing raindrops and simulations by a cloud model

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    Observing Warm Clouds in 3D Using ARM Scanning Cloud Radars and a Novel Ensemble Method Download a printable PDF Submitter: Fielding, M. D., University of Reading Area of Research: Cloud-Aerosol-Precipitation Interactions Working Group(s): Cloud Life Cycle, Cloud-Aerosol-Precipitation Interactions Journal Reference: Fielding MD, J Chiu, RJ Hogan, and G Feingold. 2014. "A novel ensemble method for retrieving properties of warm cloud in 3-D using ground-based scanning radar and zenith

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    On the Right Track for Tropical Clouds Download a printable PDF Submitter: Hagos, S. M., Pacific Northwest National Laboratory Area of Research: Atmospheric Thermodynamics and Vertical Structures Working Group(s): Cloud-Aerosol-Precipitation Interactions Journal Reference: Hagos SM, Z Feng, K Landu, and C Long. 2014. "Advection, moistening, and shallow-to-deep convection transitions during the initiation and propagation of Madden-Julian Oscillation." Journal of Advances in Earth System

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    Validation of Climate Model Ice Cloud Properties Download a printable PDF Submitter: Eidhammer, T., NCAR Area of Research: Cloud Processes Working Group(s): Cloud Life Cycle Journal Reference: Eidhammer T, H Morrison, A Bansemer, A Gettelman, and AJ Heymsfield. 2014. "Comparison of ice cloud properties simulated by the Community Atmosphere Model (CAM5) with in situ observations." Atmospheric Chemistry and Physics, 14(18), doi:10.5194/acp-14-10103-2014. Mass weighted terminal fall

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    Tall Clouds from Tiny Raindrops Grow Download a printable PDF Submitter: Hagos, S. M., Pacific Northwest National Laboratory Area of Research: Cloud Processes Working Group(s): Cloud Life Cycle Journal Reference: Hagos S, Z Feng, CD Burleyson, KS Lim, CN Long, D Wu, and T Greg. 2014. "Evaluation of convection-permitting model simulations of cloud populations associated with the Madden-Julian Oscillation using data collected during the AMIE/DYNAMO field campaign." Journal of Geophysical

  14. Research Highlight

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    Effects of Relative Humidity on Aerosols-Implications for Climate Submitter: Lacis, A. A., NASA - Goddard Institute for Space Studies Area of Research: Aerosol Properties Working Group(s): Aerosol Journal Reference: "Refractive Indices of Three Hygroscopic Aerosols and their Dependence on Relative Humidity," October 2001. Sponsored by the DOE Atmospheric Radiation Measurement (ARM) Program, science collaborators at the National Aeronautics and Space Administration (NASA) Goddard

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    Finding the Causes for Consistently Low Biased Stratiform Rainfall in Models Submitter: Varble, A., University of Utah Zipser, E., University of Utah Area of Research: Cloud Processes Working Group(s): Cloud Life Cycle Journal Reference: Varble A, EJ Zipser, AM Fridlind, P Zhu, AS Ackerman, J Chaboureau, J Fan, A Hill, B Shipway, and C Williams. 2014. "Evaluation of cloud-resolving and limited area model simulations using TWP-ICE observations. 2. Precipitation microphysics." Journal of

  16. Research Highlight

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    Satellite Inference of Thermals and Cloud Base Updraft Speeds Download a printable PDF Submitter: Zheng, Y., University of Maryland Area of Research: Vertical Velocity Working Group(s): Cloud-Aerosol-Precipitation Interactions Journal Reference: Zheng Y, D Rosenfeld, and Z Li. 2015. "Satellite inference of thermals and cloud base updraft speeds based on retrieved surface and cloud base temperatures." Journal of the Atmospheric Sciences, , . ONLINE. Validation of satellite-estimated

  17. Research Highlight

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    Even at High Humidity, Aerosols Stick Around: Slowly Evaporating Particles Refute Assumption Download a printable PDF Submitter: Zelenyuk-Imre, A., Pacific Northwest National Laboratory Area of Research: Aerosol Properties Working Group(s): Aerosol Life Cycle Journal Reference: Wilson J, D Imre, J Beránek, M Shrivastava, and A Zelenyuk. 2014. "Evaporation kinetics of laboratory-generated secondary organic aerosols at elevated relative humidity." Environmental Science & Technology,

  18. Research Highlight

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    Modeling Precipitating Cumulus Congestus Observed by the ARM Radar Suite During the MC3E Field Campaign Download a printable PDF Submitter: Mechem, D. B., University of Kansas Area of Research: Cloud Processes Working Group(s): Cloud Life Cycle, Cloud-Aerosol-Precipitation Interactions Journal Reference: Mechem DB, SE Giangrande, CS Wittman, P Borque, T Toto, and P Kollias. 2015. "Insights from modeling and observational evaluation of a precipitating continental cumulus event observed

  19. Research Highlight

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    Single Particle Database of Natural Ice Crystals: Dimensions and Aspect Ratios Download a printable PDF Submitter: Um, J., University of Illinois, Urbana McFarquhar, G., University of Illinois, Urbana Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Life Cycle Journal Reference: Um J, GM McFarquhar, Y Hong, S Lee, C Jung, R Lawson, and Q Mo. 2015. "Dimensions and aspect ratios of natural ice crystals." Atmospheric Chemistry and Physics, 15,

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    Regime Analysis to Identify the Contribution of Clouds to Surface Temperature Errors in GCMs Submitter: Van Weverberg, K., Met Office Area of Research: General Circulation and Single Column Models/Parameterizations Working Group(s): Cloud Life Cycle Journal Reference: Van Weverberg K, CJ Morcrette, H Ma, SA Klein, and JC Petch. 2015. "Using regime analysis to identify the contribution of clouds to surface temperature errors in weather and climate models." Quarterly Journal Royal

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    "Radiance Assimilation" Correction Method Improves Water Vapor Radiosonde Observations in the Upper Troposphere Submitter: Soden, B. J., University of Miami Area of Research: General Circulation and Single Column Models/Parameterizations Working Group(s): Cloud Modeling Journal Reference: Soden, B.J., D.D. Turner, B.M. Lesht, and L.M. Miloshevich (2004), An analysis of satellite, radiosonde, and lidar observations of upper tropospheric water vapor from the Atmospheric Radiation

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    Developing and Evaluating Ice Cloud Parameterizations by Combining Radar and in Situ Observations Download a printable PDF Submitter: Maahn, M., University of Cologne Loehnert, U., University of Cologne Area of Research: Cloud Processes Working Group(s): Cloud Life Cycle, Cloud-Aerosol-Precipitation Interactions Journal Reference: Maahn M, U Löhnert, P Kollias, RC Jackson, and GM McFarquhar. 2015. "Developing and Evaluating Ice Cloud Parameterizations for Forward Modeling of Radar Moments

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    Parameterizing the Mixing State of Complex Submicron Aerosols Using Chemical Imaging Download a printable PDF Submitter: Moffet, R., University of the Pacific Area of Research: Aerosol Processes Working Group(s): Aerosol Life Cycle Journal Reference: O'Brien RE, B Wang, A Laskin, N Riemer, M West, Q Zhang, Y Sun, X Yu, P Alpert, DA Knopf, MK Gilles, and RC Moffet. 2015. "Chemical imaging of ambient aerosol particles: Observational constraints on mixing state parameterization." Journal

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    Arctic Haze: Effect of Anthropogenic and Biomass Burning Aerosols Transported from Europe to the Arctic Download a printable PDF Submitter: Fast, J. ., Pacific Northwest National Laboratory Area of Research: Aerosol Properties Working Group(s): Cloud-Aerosol-Precipitation Interactions Journal Reference: Marelle L, J Raut, JL Thomas, KS Law, B Quennehen, G Ancellet, J Pelon, A Schwarzenboeck, and JD Fast. 2015. "Transport of anthropogenic and biomass burning aerosols from Europe to the

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    Evaluation of Double-moment Microphysical Parameterization with Observations During MC3E Download a printable PDF Submitter: Pu, Z., University of Utah Area of Research: Cloud Processes Working Group(s): Cloud Life Cycle Journal Reference: Pu Z and C Lin. 2015. "Evaluation of double-moment representation of ice hydrometeors in bulk microphysical parameterization: comparison between WRF numerical simulations and UND-Citation data during MC3E." Geoscience Letters, 2(11),

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    KDP Columns: Characterizing Deep Thunderstorm Updrafts Using Polarimetric Radar Download a printable PDF Submitter: van Lier-Walqui, M., NASA Fridlind, A. M., NASA - Goddard Institute for Space Studies Area of Research: Cloud-Aerosol-Precipitation Interactions Working Group(s): Cloud-Aerosol-Precipitation Interactions Journal Reference: van Lier-Walqui M, AM Fridlind, AS Ackerman, S Collis, J Helmus, DR MacGorman, K North, P Kollias, and DJ Posselt. 2015. "On polarimetric radar signatures

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    Out with the Old, in with the New: McICA to Replace Traditional Cloud Overlap Assumptions Submitter: Pincus, R., NOAA - CIRES Climate Diagnostics Center Area of Research: Atmospheric Thermodynamics and Vertical Structures Working Group(s): Cloud Modeling Journal Reference: Pincus, R., R. Hemler, and S.A. Klein, 2006: Using Stochastically Generated Subcolumns to Represent Cloud Structure in a Large-Scale Model. Mon. Wea. Rev., 134, 3644-3656. As shown by the difference between the two panels, the

  8. Research Highlight

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    For Estimates of Cloud Optical Thickness, Simple Equation Is Good Enough Submitter: Barnard, J., University of Nevada Reno Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Properties Journal Reference: Barnard, J. C., and C. N. Long, (2004): A Simple Empirical Equation to Calculate Cloud Optical Thickness Using Shortwave Broadband Measurement, JAM, 43, 1057-1066. Distributions of cloud optical thickness reveal that the empirical method (dashed line) closely

  9. Research Highlight

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    A "Little" Respect: Droplet Nucleation Finally Included in Global Climate Model Download a printable PDF Submitter: Ghan, S. J., Pacific Northwest National Laboratory Area of Research: General Circulation and Single Column Models/Parameterizations Working Group(s): Cloud Modeling Journal Reference: N/A Reflection of sunlight by clouds simulated with predicted droplet number with (dark blue) and without (green) the autoconversion feedback agrees remarkably well with the reflection

  10. Research Highlight

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    Self-Regulation Strikes a Balance Between Hydrological Cycle, Radiation Processes, and Intraseasonal Dynamic Variations Submitter: Stephens, G. L., Colorado State University Area of Research: Atmospheric Thermodynamics and Vertical Structures Working Group(s): Cloud Properties Journal Reference: Stephens, Graeme L., Webster, Peter J., Johnson, Richard H., Engelen, Richard, L'Ecuyer, Tristan. 2004: Observational Evidence for the Mutual Regulation of the Tropical Hydrological Cycle and Tropical

  11. Research Highlight

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    Earth Lightens Up Submitter: Long, C. N., NOAA Global Monitoring Division/CIRES Area of Research: Radiation Processes Working Group(s): Radiative Processes Journal Reference: Wild, M., H. Gilgen, A. Roesch, A. Ohmura, C. N. Long, E. G. Dutton, B. Forgan, A. Kallis, V. Russak, and A. Tsvetkov, (2005): From dimming to brightening: Decadal changes in solar radiation at the Earth's surface, Science, 308, Issue 5723, 847-850, [DOI:10.1126/science.1103215] Global distribution of surface observation

  12. Research Highlight

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    Aerosol Experiment Results Featured in Technical Journal Submitter: Sheridan, P., U.S. Department of Commerce/NOAA Area of Research: Aerosol Properties Working Group(s): Aerosol Journal Reference: Sheridan, P, W Arnott, J Ogren, E Andrews, D Atkinson, D Covert, H Moosmuller, A Petzold, B Schmid, A Strawa, R Varma, and A Virkkula. 2005. "The Reno Aerosol Optics Study: An evaluation of aerosol absorption measurement methods." Aerosol Science and Technology 39(1):1-16. This magnification

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    Correction Method for Infrared Detector Confirmed; Error in Clear Sky Bias Condition Remains Unresolved Submitter: Turner, D. D., National Oceanic and Atmospheric Administration Area of Research: Radiation Processes Working Group(s): Radiative Processes Journal Reference: N/A AERI data from January 2004 at the ARM North Slope of Alaska locale shows the observed radiance for two AERI systems with significantly different hot blackbody temperatures. Residuals are within 1% of the ambient radiance

  14. Research Highlight

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    Aerosols Help Clouds Warm Up Arctic Submitter: Lubin, D., National Science Foundation Area of Research: Radiation Processes Working Group(s): Radiative Processes Journal Reference: Lubin, D., and A.M. Vogelmann, 2006: A climatologically significant aerosol longwave indirect effect in the Arctic, Nature, 439, 26 January, 453-456, doi:10.1038/nature04449 In a process known as the first aerosol indirect effect, enhanced aerosol concentrations cause the droplets in a cloud to be smaller and more

  15. Research Highlight

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    Broadband Albedo Observations in the Southern Great Plains Submitter: Lamb, P. J., University of Oklahoma Area of Research: Aerosol Properties Working Group(s): Aerosol Journal Reference: Journal of Applied Meteorology and Climatology, Vol. 45, 2006, pp. 210-235. Figure 1 Figure 2 Because surface reflection of solar radiation plays a fundamental role in the surface energy budget, knowledge of its spatial and temporal variability is important for understanding the weather and climate of a

  16. Research Highlight

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    Tackling Tropical Convection in Climate Models Submitter: Zhang, G., University of California, San Diego Area of Research: General Circulation and Single Column Models/Parameterizations Working Group(s): Cloud Modeling Journal Reference: Zhang, G. J., and H. Wang, 2006. Toward mitigating the double ITCZ problem in NCAR CCSM3, Geophys. Res. Lett., 33, L06709, doi:10.1029/2005GL025229 (23 March 2006). Figure 1. Climate models commonly suffer from a problem known as the double-ITCZ, which is

  17. Research Highlight

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    Weather Forecasts Help to Understand Climate Model Biases Submitter: Klein, S., Lawrence Livermore National Laboratory Area of Research: General Circulation and Single Column Models/Parameterizations Working Group(s): Cloud Modeling Journal Reference: Klein, Stephen A., X. Jiang, J. Boyle, S. Malyshev, and S. Xie, 2006: Diagnosis of the summertime warm and dry bias over the U. S. Southern Great Plains in the GFDL climate model using a weather forecasting approach. Geophys. Res. Lett., 33,

  18. Research Projects

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    Past Research Projects Composite-to-Steel Joint Integrity Monitoring and Assessment Collaboration between Los Alamos National Laboratory and the University of California at San Diego (UCSD) Jacobs School of Engineering Contact Institute Director Charles Farrar (505) 663-5330 Email UCSD EI Director Michael Todd (858) 534-5951 Professional Staff Assistant Ellie Vigil (505) 667-2818 Email Administrative Assistant Rebecca Duran (505) 665-8899 Email UCSD Faculty and Graduate Students Professor

  19. Research Highlight

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    A New Model for Liquid Water Absorption Download a printable PDF Submitter: Turner, D. D., National Oceanic and Atmospheric Administration Cadeddu, M. P., Argonne National Laboratory Area of Research: Radiation Processes Working Group(s): Cloud Life Cycle Journal Reference: Turner DD, S Kneifel, and MP Cadeddu. 2016. "An improved liquid water absorption model at microwave frequencies for supercooled liquid water clouds." Journal of Atmospheric and Oceanic Technology, 33(1),

  20. Research Highlight

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    Radiative and Thermodynamic Responses to Uncertainty in Aerosol Extinction Profiles Download a printable PDF Submitter: Feng, Y., Argonne National Laboratory Area of Research: Aerosol Properties Working Group(s): Aerosol Life Cycle Journal Reference: Feng Y, R Kotamarthi, R Coulter, C Zhao, and M Cadeddu. 2016. "Radiative and Thermodynamic Responses to Aerosol Extinction Profiles during the Pre-monsoon Month over South Asia." Atmospheric Chemistry and Physics, 16(1), 247-264. WRF-Chem

  1. Research Highlight

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    Exploring Stratocumulus Cloud-Top Entrainment Processes and Parameterizations by Using Doppler Download a printable PDF Submitter: Albrecht, B. A., University of Miami Area of Research: Cloud Processes Working Group(s): Cloud Life Cycle Journal Reference: Albrecht B, M Fang, and V Ghate. 2016. "Exploring Stratocumulus Cloud-Top Entrainment Processes and Parameterizations by Using Doppler Cloud Radar Observations." Journal of the Atmospheric Sciences, 73(2), 10.1175/JAS-D-15-0147.1.

  2. Research Highlight

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    Clouds' Role in Sunlight Stopping Download a printable PDF Submitter: Burleyson, C. D., Pacific Northwest National Laboratory Area of Research: Radiation Processes Working Group(s): Cloud Life Cycle Journal Reference: Burleyson CD, CN Long, and JM Comstock. 2015. "Quantifying diurnal cloud radiative effects by cloud type in the Tropical Western Pacific." Journal of Applied Meteorology and Climatology, , doi:10.1175/JAMC-D-14-0288.1. ONLINE. Sunlight streaks through clouds over the

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    The Dark Side of Cold Clouds Download a printable PDF Submitter: Kulkarni, G., Pacific Northwest National Laboratory Area of Research: Aerosol Properties Working Group(s): Aerosol Life Cycle Journal Reference: China S, G Kulkarni, BV Scarnato, N Sharma, M Pekour, JE Shilling, J Wilson, A Zelenyuk, D Chand, S Liu, AC Aiken, MK Dubey, A Laskin, RA Zaveri, and C Mazzoleni. 2015. "Morphology of diesel soot residuals from supercooled water droplets and ice crystals: implications for optical

  4. Research Opportunities

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    Opportunities /collaboration/_assets/images/icon-collaboration.jpg Research Opportunities Partnering with respected universities, LANL Centers provide exceptional educational opportunities and support staff recruitment, revitalization, and retention. Center for Nonlinear Studies» Quantum Institute» Energy Security Center» Seaborg Institute» Center for Space and Earth Science» TOP STORIES - highlights of our science, people, technologies close Bulging Van Allen Belts Learn about the Van

  5. Research Highlight

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    Tests of Single-Column Models with ARM Data Submitter: Randall, D. A., Colorado State University Area of Research: General Circulation and Single Column Models/Parameterizations Working Group(s): Cloud Modeling Journal Reference: N/A Figure 1 Figure 2 One of the primary goals of ARM is to collect observations that can be used to test models of cloud formation and radiative transfer in the atmosphere. One class of such models, called "single-column models," is designed to predict the

  6. Research Highlight

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    An Assessment of the ECMWF Model over the Arctic Land Using Observations from the Mixed-Phase Arctic Cloud Experiment Submitter: Xie, S., Lawrence Livermore National Laboratory Area of Research: General Circulation and Single Column Models/Parameterizations Working Group(s): Cloud Modeling Journal Reference: Xie, S., S. A. Klein, J. J. Yio, A. C. M. Beljaars, C. N. Long, and M. Zhang, (2006): An Assessment of the ECMWF Model over the Arctic Land Using Observations from the ARM Mixed-Phase Arctic

  7. Research Highlight

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    Retrieving Cloud Characteristics from Ground-Based Daytime Color All-Sky Images Submitter: Long, C. N., NOAA Global Monitoring Division/CIRES Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Properties Journal Reference: Long, C. N., J. M. Sabburg, J. Calbo, and D. Pages, (2006): Retrieving Cloud Characteristics from Ground-based Daytime Color All-sky Images, JTech, 23, No. 5, 633–652. Long, C. N., J. M. Sabburg, J. Calbo, and D. Pages, (2006): Papers of Note:

  8. Research Highlight

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    Observations of Microphysical Properties of Single Layer Stratocumulus During the Mixed-Phase Arctic Cloud Experiment Submitter: McFarquhar, G., University of Illinois, Urbana Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Properties Journal Reference: Fridlind, A.M., A.S. Ackerman, G.M. McFarquhar, G. Zhang, M.R. Poellot, P.J. DeMott, A.J. Prenni and A.J. Heymsfield, 2007: Ice properties of single-layer stratocumulus during the Mixed-Phase Arctic Cloud

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    Using ARM Cloud Data to Evaluate the Effect of a Land Surface on Clouds Download a printable PDF Submitter: GSFC, N., NASA GSFC Area of Research: Cloud Distributions/Characterizations Working Group(s): Aerosol, Cloud Modeling Journal Reference: Zeng, X., W.-K. Tao, M. Zhang, C. Peters-Lidard, S. Lang, J. Simpson, S. Kumar, S. Xie, J. L. Eastman, C.-L. Shie, and J. V. Geiger, 2007: Evaluating clouds in long-term cloud-resolving model simulations with observational data. J. Atmos. Sci. (in press).

  10. Research Highlight

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    Theoretical Formulation for Cloud-to-Rain Transition Submitter: Liu, Y., Brookhaven National Laboratory Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Modeling Journal Reference: Liu, Y., P. H. Daum, R. McGraw, M. Miller, and S. Niu, 2007: Theoretical formulation for autoconversion rate of cloud droplet concentration. Geophys. Res. Lett., 34, L116821, doi:10.1029/2007GL030389. The "typical drop radius" r* as a function of the mean volume radius r3

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    Cloud Regimes in the TWP and Their Evolution over the MJO Download a printable PDF Submitter: Del Genio, A. D., National Aeronautics and Space Administration Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Modeling Journal Reference: Chen, Y, and AD Del Genio. 2008. "Evaluation of tropical cloud regimes in observations and a general circulation model." Climate Dynamics doi:10.1007/s00382-008-0386-6. Mean highest cloud-top vertical profiles from ARSCL

  12. Research Highlight

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    Aerosol Effects on Liquid-Water Path of Thin Stratocumulus Clouds Download a printable PDF Submitter: Penner, J. E., University of Michigan Lee, S., University of Michigan Area of Research: Aerosol Properties Working Group(s): Aerosol Journal Reference: n/a Thin clouds with mean liquid-water path (LWP) of ~ 50 g m-2 cover 27.5% of the globe and thus play an important role in the Earth's radiation budget. Radiative fluxes at the Earth's surface and top of atmosphere (TOA) are very sensitive to

  13. Research Highlight

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    Preview of TWP MFRSR Data Submitter: Chuang, C., Lawrence Livermore National Laboratory Area of Research: Radiation Processes Working Group(s): Radiative Processes Journal Reference: N/A Figure 1. MFRSR data from the TWP site (97/09/10) Figure 2. Aerosol optical depth and Angstrom exponent Figure 3. Water vapor derived from MFRSR and MWR Key contributors to this work are Jim Barnard and Will Shaw. The Multi-Filter Rotating Shadowband Radiometer (MFRSR) is a ground-based radiometer that uses

  14. Research Highlight

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    Mixed-Phase Cloud Radiative Properties from M-PACE Microphysical Retrievals Download a printable PDF Submitter: de Boer, G., University of Colorado, Boulder/CIRES Area of Research: Radiation Processes Working Group(s): Cloud Life Cycle Journal Reference: de Boer G, WD Collins, S Menon, and CN Long. 2011. "Using surface remote sensors to derive radiative characteristics of mixed-phase clouds: An example from M-PACE." Atmospheric Chemistry and Physics, 11, doi: 10.5194/acp-11-11937-2011.

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    Seasonal and Interannual Variability in 13C of Ecosystem Carbon Fluxes from 2002-2009 Submitter: Torn, M. S., Lawrence Berkeley National Laboratory Area of Research: Surface Properties Working Group(s): Aerosol Life Cycle Journal Reference: Torn MS, SC Biraud, CJ Still, WJ Riley, and JA Berry. 2011. "Seasonal and inter-annual variability in δ13C of net ecosystem carbon exchanges from 2002-2009 in the U.S. Southern Great Plains." Tellus, 63(2), 10.1111/j.1600-0889.2010.00519.x. Time

  16. Research Highlight

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    The Long-Term Impacts of Aerosols on the Vertical Development of Clouds and Precipitation Download a printable PDF Submitter: Li, Z., University of Maryland Area of Research: Cloud-Aerosol-Precipitation Interactions Working Group(s): Cloud-Aerosol-Precipitation Interactions Journal Reference: Li Z, F Niu, J Fan, Y Liu, and D Rosenfeld. 2011. "The long-term impacts of aerosols on the vertical development of clouds and precipitation." Nature-Geoscience, 4, doi:10.1038/NGEO1313. Changes

  17. Research Highlight

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    K-Distribution Method for a SW Radiative Transfer Model Submitter: Ackerman, T. P., University of Washington Area of Research: General Circulation and Single Column Models/Parameterizations Working Group(s): Cloud Modeling Journal Reference: Kato, S., Ackerman, T.P., Mather, J.H., and Clothiaux, E.E., 1999: "The K-distribution Method and Correlated-k Approximation for a Shortwave Radiative Transfer Model," Journal of Quantitative Spectroscopy & Radiative Transfer, 62(1):109-121.

  18. Research Highlight

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    Memo from Real World to Cumulus Parameterizations: Get Organized! Download a printable PDF Submitter: Del Genio, A. D., National Aeronautics and Space Administration Area of Research: Cloud Processes Working Group(s): Cloud Life Cycle Journal Reference: Del Genio AD, J Wu, and Y Chen. 2012. "Characteristics of mesoscale organization in WRF simulations of convection during TWP-ICE." Journal of Climate, 25(17), 5666, doi:10.1175/JCLI-D-11-00422.1. Properties of cold pool air (solid

  19. Research Highlight

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    To Rain or Not to Rain...Aerosols May Be the Answer Download a printable PDF Submitter: Li, Z., University of Maryland Area of Research: Cloud-Aerosol-Precipitation Interactions Working Group(s): Cloud-Aerosol-Precipitation Interactions Journal Reference: Niu F and Z Li. 2012. "Systematic variations of cloud top temperature and precipitation rate with aerosols over the global tropics." Atmospheric Chemistry and Physics, 12, doi:10.5194/acp-12-8491-2012. Cloud-top temperature (A, C) and

  20. Research Highlight

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    The Complexity of Arctic Clouds Download a printable PDF Submitter: Shupe, M., University of Colorado Area of Research: Cloud Processes Working Group(s): Cloud Life Cycle Journal Reference: Morrison H, G de Boer, G Feingold, J Harrington, M Shupe, and K Sulia. 2011. "Resilience of persistent Arctic mixed-phase clouds." Nature Geoscience, 5, doi:10.1038/ngeo1332. Arctic climate feedbacks: The processes that allow mixed-phased clouds to persist in the Arctic are surprisingly complex and

  1. Research Highlight

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    More Like Shades of Gray: the Effects of Black Carbon in Aerosols Submitter: McComiskey, A. C., National Oceanic and Atmospheric Administration Area of Research: Aerosol Properties Working Group(s): Aerosol Life Cycle Journal Reference: Cappa CD, TB Onasch, P Massoli, DR Worsnop, TS Bates, ES Cross, P Davidovits, J Hakala, KL Hayden, BT Jobson, KR Kolesar, DA Lack, BM Lerner, SM Li, D Mellon, I Nuaaman, JS Olfert, T Petaja, PK Quinn, C Song, R Subramanian, EJ Williams, and RA Zaveri. 2012.

  2. Research Highlight

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    Mingling in the Sky-A View from the Earth Submitter: Bhattacharya, A., Pacific Northwest National Laboratory Area of Research: Cloud-Aerosol-Precipitation Interactions Working Group(s): Cloud-Aerosol-Precipitation Interactions Journal Reference: Madhavan BL, Y He, Y Wu, B Gross, F Moshary, and S Ahmed. 2012. "Development of a ground based remote sensing approach for direct evaluation of aerosol-cloud interaction." Atmosphere, 3(4), doi:10.3390/atmos3040468. Two different types of

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    Unique Properties of the Arctic Stratiform Cloud-Top Region Submitter: Shupe, M., University of Colorado Area of Research: Cloud Processes Working Group(s): Cloud Life Cycle Journal Reference: Sedlar J, MD Shupe, and M Tjernström. 2011. "On the relationship between thermodynamic structure and cloud top, and its climate significance in the Arctic." Journal of Climate, 25(7), doi:10.1175/JCLI-D-11-00186.1. Occurrence frequency of low-level, stratiform cloud cases used in the analysis

  4. Research Highlight

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    Single-Column Modeling, GCM Parameterizations and ARM Data Submitter: Somerville, R. C., Scripps Institution of Oceanography Area of Research: General Circulation and Single Column Models/Parameterizations Working Group(s): Cloud Modeling Journal Reference: Randall, D.A., K.-M. Xu, R.C.J. Somerville, and S. Iacobellis, 1996: "Single-Column Models and Cloud Ensemble Models as Links between Observations and Climate Models," J. Climate 9(8)1683-1697. Figure 1 Figure 2 Figure 3 Figure 4

  5. Research Highlight

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    Drizzle in the Making Download a printable PDF Submitter: Luke, E., Brookhaven National Laboratory Area of Research: Cloud Processes Working Group(s): Cloud Life Cycle Journal Reference: Luke EP and P Kollias. 2013. "Separating cloud and drizzle radar moments during precipitation onset using Doppler spectra." Journal of Atmospheric and Oceanic Technology, 30(8), http://dx.doi.org/10.1175/JTECH-D-11-00195.1. This image shows droplet motion measured by a cloud profiling radar, with the

  6. Research Highlight

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    Dust in the Wind... and the Clouds... and the Atmosphere Submitter: Sassen, K., University of Alaska, Fairbanks Area of Research: Aerosol Properties Working Group(s): Aerosol Journal Reference: Sassen, K., P.J. DeMott, J.M. Propsero, and M.R. Poellot, Saharan Dust Storms and Indirect Aerosol Effects on Clouds: CRYSTAL-FACE Results, Geophys. Res. Ltt., 30(12), 1633, doi:10/1029/2003GL017371, 2003. PDL linear depolarization ratio (color scale on top) and relative returned power (in gray scale) of

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    Comparison of Mixed-layer Heights from Airborne HSRL and WRF-Chem During CARES Download a printable PDF Submitter: Scarino, A. J., Science Systems and Applications, Inc. Area of Research: Aerosol Properties Working Group(s): Aerosol Life Cycle Journal Reference: Scarino AJ, MD Obland, JD Fast, SP Burton, RA Ferrare, CA Hostetler, LK Berg, B Lefer, C Haman, JW Hair, RR Rogers, C Butler, AL Cook, and DB Harper. 2014. "Comparison of mixed layer heights from airborne high spectral resolution

  8. Research Highlight

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    Deciphering Raindrop Collisions with Dual-polarization Radar Download a printable PDF Submitter: Kumjian, M., Pennsylvania State University Area of Research: Cloud Processes Working Group(s): Cloud Life Cycle, Cloud-Aerosol-Precipitation Interactions Journal Reference: Kumjian MR and OP Prat. 2014. "The impact of raindrop collisional processes on the polarimetric radar variables." Journal of the Atmospheric Sciences, 71(8), doi:10.1175/JAS-D-13-0357.1. (a) Changes in ZDR as a function

  9. Research Highlight

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    The Shapes and Phases of Small Particles in Mixed-Phase Clouds Download a printable PDF Submitter: McFarquhar, G., University of Illinois, Urbana Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Life Cycle Journal Reference: McFarquhar GM, J Um, and R Jackson. 2013. "Small cloud particle shapes in mixed-phase clouds." Journal of Applied Meteorology and Climatology, 52(5), doi:10.1175/JAMC-D-12-0114.1. Figure 1. Magnified images of four particles imaged

  10. Research Highlight

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    The Two Faces of Aerosols Download a printable PDF Submitter: Ovink, J., Pacific Northwest National Laboratory Area of Research: Cloud Processes Working Group(s): Cloud Life Cycle Journal Reference: Berg LK, M Shrivastava, RC Easter, JD Fast, EG Chapman, Y Liu, and RA Ferrare. 2015. "A New WRF-Chem Treatment for Studying Regional Scale Impacts of Cloud Processes on Aerosol and Trace Gases in Parameterized Cumuli." Geoscientific Model Development, 8, doi:10.5194/gmd-8-409-2015. A new

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    ARM Data Used to Evaluate Reanalysis Results Download a printable PDF Submitter: Dong, X., University of North Dakota Area of Research: Radiation Processes Working Group(s): Cloud Life Cycle Journal Reference: Dolinar E, X Dong, and B Xi. 2015. "Evaluation and intercomparison of clouds, precipitation, and radiation budgets in recent reanalyses using satellite-surface observations." Climate Dynamics, , DOI 10.1007/s00382-0, 10.1007/s00382-0. Figure 1. Monthly means of CF (a), SWDNsfc

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    Simulating the MJO: Everybody Into the (Cold) Pool! Download a printable PDF Submitter: Del Genio, A. D., National Aeronautics and Space Administration Area of Research: General Circulation and Single Column Models/Parameterizations Working Group(s): Cloud Life Cycle Journal Reference: Del Genio AD, J Wu, AB Wolf, Y Chen, M Yao, and D Kim. 2015. "Constraints on cumulus parameterization from simulations of observed MJO events." Journal of Climate, 28(16), doi:10.1175/JCLI-D-14-00832.1.

  13. Research Highlight

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    New Technique Successful for Measuring Thickness of Broken Clouds Submitter: Marshak, A., NASA - Goddard Space Flight Center Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud Properties Journal Reference: Marshak, A, Y Knyazikhin, K.D. Evans, and W.J. Wiscomb, (2004): The "RED versus NIR" Plane to Retrieve Broken-Cloud Optical Depth from Ground-Based Measurements, Journal of Atmospheric Sciences , 61, 1911-1925. In the "lookup table," vertical

  14. Research Highlight

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    "Roobik" Is Part of the Answer, Not a Puzzle Submitter: Turner, D. D., National Oceanic and Atmospheric Administration Area of Research: Radiation Processes Working Group(s): Radiative Processes Journal Reference: N/A Taking place during the arid Arctic winter, the RHUBC will obtain measurements in the far-infrared (15-40 microns), when the so-called "Arctic" infrared window between 16 and 40 microns is semi-transparent. Between February and March 2007 at the ACRF North Slope

  15. Research Highlight

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    Improving Entrainment Rate Parameterization Download a printable PDF Submitter: Liu, Y., Brookhaven National Laboratory Area of Research: Cloud Processes Working Group(s): Cloud Life Cycle Journal Reference: Lu C, Y Liu, GJ Zhang, X Wu, S Endo, L Cao, Y Li, and X Guo. 2016. "Improving parameterization of entrainment rate for shallow convection with aircraft measurements and large-eddy simulations." Journal of the Atmospheric Sciences, 73(2), doi:10.1175/JAS-D-15-0050.1. Relationships

  16. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    An Update on Unmanned Platforms at Oliktok Point Download a printable PDF Submitter: de Boer, G., University of Colorado, Boulder/CIRES Area of Research: Atmospheric Thermodynamics and Vertical Structures Working Group(s): Aerosol Life Cycle, Cloud Life Cycle, Cloud-Aerosol-Precipitation Interactions Journal Reference: de Boer G, MD Ivey, B Schmid, S McFarlane, and R Petty. 2016. "Unmanned platforms monitor the Arctic atmosphere." EOS, 97, doi:10.1029/2016EO046441. Figure 1: Gijs de

  17. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Clouds Re-gathered by Wind Shear Download a printable PDF Submitter: Yang, Q., Pacific Northwest National Laboratory Area of Research: Cloud-Aerosol-Precipitation Interactions Working Group(s): Cloud-Aerosol-Precipitation Interactions Journal Reference: Yang Q, RC Easter, P Campuzano-Jost, JL Jimenez, JD Fast, SJ Ghan, H Wang, LK Berg, MC Barth, Y Liu, MB Shrivastava, B Singh, H Morrison, J Fan, CL Ziegler, M Bela, E Apel, GS Diskin, T Mikoviny, and A Wisthaler. 2015. "Aerosol transport and

  18. Research Highlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Storm Clouds Take Rain on Rollercoaster Ride Download a printable PDF Submitter: Ovchinnikov, M., Pacific Northwest National Laboratory Area of Research: Cloud Processes Working Group(s): Cloud Life Cycle Journal Reference: Wong M, M Ovchinnikov, and M Wang. 2015. "Evaluation of subgrid-scale hydrometeor transport schemes using a high-resolution cloud-resolving model." Journal of the Atmospheric Sciences, 72(9), doi:10.1175/JAS-D-15-0060.1. Strong updrafts within the cloud propel their

  19. Research Tools

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Software & Tools Development Network R&D Software-Defined Networking (SDN) Experimental Network Testbeds Performance (perfSONAR) Software & Tools Development Data for Researchers Partnerships Publications Workshops Contact Us Technical Assistance: 1 800-33-ESnet (Inside US) 1 800-333-7638 (Inside US) 1 510-486-7600 (Globally) 1 510-486-7607 (Globally) Report Network Problems: trouble@es.net Provide Web Site Feedback: info@es.net Software & Tools Development Over the years, ESnet

  20. A global analysis of soil microbial biomass carbon, nitrogen and phosphorus in terrestrial ecosystems

    SciTech Connect (OSTI)

    Xu, Xiaofeng; Thornton, Peter E; Post, Wilfred M

    2013-01-01

    Soil microbes play a pivotal role in regulating land-atmosphere interactions; the soil microbial biomass carbon (C), nitrogen (N), phosphorus (P) and C:N:P stoichiometry are important regulators for soil biogeochemical processes; however, the current knowledge on magnitude, stoichiometry, storage, and spatial distribution of global soil microbial biomass C, N, and P is limited. In this study, 3087 pairs of data points were retrieved from 281 published papers and further used to summarize the magnitudes and stoichiometries of C, N, and P in soils and soil microbial biomass at global- and biome-levels. Finally, global stock and spatial distribution of microbial biomass C and N in 0-30 cm and 0-100 cm soil profiles were estimated. The results show that C, N, and P in soils and soil microbial biomass vary substantially across biomes; the fractions of soil nutrient C, N, and P in soil microbial biomass are 1.6% in a 95% confidence interval of (1.5%-1.6%), 2.9% in a 95% confidence interval of (2.8%-3.0%), and 4.4% in a 95% confidence interval of (3.9%-5.0%), respectively. The best estimates of C:N:P stoichiometries for soil nutrients and soil microbial biomass are 153:11:1, and 47:6:1, respectively, at global scale, and they vary in a wide range among biomes. Vertical distribution of soil microbial biomass follows the distribution of roots up to 1 m depth. The global stock of soil microbial biomass C and N were estimated to be 15.2 Pg C and 2.3 Pg N in the 0-30 cm soil profiles, and 21.2 Pg C and 3.2 Pg N in the 0-100 cm soil profiles. We did not estimate P in soil microbial biomass due to data shortage and insignificant correlation with soil total P and climate variables. The spatial patterns of soil microbial biomass C and N were consistent with those of soil organic C and total N, i.e. high density in northern high latitude, and low density in low latitudes and southern hemisphere.

  1. Research | Energy Frontier Research Centers

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Research Home Below are images. Click on the image to see a larger view. Nanostructural Bulk Chalcogenides TEM image High resolution TEM image showing spinodally decomposed regions in PbTe-16%PbS. TEM image TEM images showing dispersed nanoparticles in samples of: (A) PbTe-Sb(2%) (B) PbTe-Sb(4%) (C) PbTe-Sb(8%) and (D) PbTe-Sb(16%). A pulsed-laser enhanced 3-D LEAP tomograph involves replacing electric pulses with picosecond laser pulses, indicated by incident red wave in left-hand figure.

  2. Staff Research Physicist (Experimental Research, FLARE) | Princeton...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Experimental Research, FLARE) Department: Research Staff: RM 02 Requisition Number: 1500503 The Princeton Plasma Physics Laboratory seeks to fill a staff research physicist...

  3. Research Affiliate Program | Photosynthetic Antenna Research...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Research Affiliate Program Research Affiliate Program Research Affiliates are collaborators who are not current PARC principal investigators andor who are from academic or...

  4. Agricultural Research Service (ARS) Research Participation Program...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Home About USDA ARS About ORISE Current Research Opportunities Site Map Contact ORISE Facebook Twitter Applicants Welcome to the Agricultural Research Service (ARS) Research...

  5. NREL: Photovoltaics Research - Solar Energy Research Facility

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Solar Energy Research Facility Photo of the Solar Energy Research Facility. The exterior stepped clerestory of the Solar Energy Research Facility. Photovoltaics (PV) and basic ...

  6. Research Teams - Combustion Energy Frontier Research Center

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Research Teams Research Teams Associates Greg Smith, Senior Research Chemist, SRI ... Colin Smith, Thermal Engineer, Jet Propulsion Laboratory Previously co-sponsored by ...

  7. N-body simulations of terrestrial planet formation under the influence of a hot Jupiter

    SciTech Connect (OSTI)

    Ogihara, Masahiro; Kobayashi, Hiroshi; Inutsuka, Shu-ichiro E-mail: ogihara@nagoya-u.jp

    2014-06-01

    We investigate the formation of multiple-planet systems in the presence of a hot Jupiter (HJ) using extended N-body simulations that are performed simultaneously with semianalytic calculations. Our primary aims are to describe the planet formation process starting from planetesimals using high-resolution simulations, and to examine the dependences of the architecture of planetary systems on input parameters (e.g., disk mass, disk viscosity). We observe that protoplanets that arise from oligarchic growth and undergo type I migration stop migrating when they join a chain of resonant planets outside the orbit of an HJ. The formation of a resonant chain is almost independent of our model parameters, and is thus a robust process. At the end of our simulations, several terrestrial planets remain at around 0.1 AU. The formed planets are not equal mass; the largest planet constitutes more than 50% of the total mass in the close-in region, which is also less dependent on parameters. In the previous work of this paper, we have found a new physical mechanism of induced migration of the HJ, which is called a crowding-out. If the HJ opens up a wide gap in the disk (e.g., owing to low disk viscosity), crowding-out becomes less efficient and the HJ remains. We also discuss angular momentum transfer between the planets and disk.

  8. Argonne Terrestrial Carbon Cycle Data from Batavia Prairie and Agricultural Sites

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Matamala, Roser [ANL; Jastrow, Julie D.; Lesht, Barry [ANL; Cook, David [ANL; Pekour, Mikhail [ANL; Gonzalez-Meler, Miquel A. [University of Illinois at Chicago

    Carbon dioxide fluxes and stocks in terrestrial ecosystems are key measurements needed to constrain quantification of regional carbon sinks and sources and the mechanisms controlling them. This information is required to produce a sound carbon budget for North America. This project examines CO2 and energy fluxes from agricultural land and from restored tallgrass prairie to compare their carbon sequestration potentials. The study integrates eddy covariance measurements with biometric measurements of plant and soil carbon stocks for two systems in northeastern Illinois: 1) long-term cultivated land in corn-soybean rotation with conventional tillage, and 2) a 15 year-old restored prairie that represents a long-term application of CRP conversion of cultivated land to native vegetation. The study contributes to the North American Carbon Program (NACP) by providing information on the magnitude and distribution of carbon stocks and the processes that control carbon dynamics in cultivated and CRP-restored land in the Midwest. The prairie site has been functioning since October 2004 and the agricultural site since July 2005. (From http://www.atmos.anl.gov/ FERMI/index.html)

  9. Terrestrial planet formation in the presence of migrating super-Earths

    SciTech Connect (OSTI)

    Izidoro, Andr; Morbidelli, Alessandro; Raymond, Sean N. E-mail: morbidelli@oca.eu

    2014-10-10

    Super-Earths with orbital periods less than 100 days are extremely abundant around Sun-like stars. It is unlikely that these planets formed at their current locations. Rather, they likely formed at large distances from the star and subsequently migrated inward. Here we use N-body simulations to study the effect of super-Earths on the accretion of rocky planets. In our simulations, one or more super-Earths migrate inward through a disk of planetary embryos and planetesimals embedded in a gaseous disk. We tested a wide range of migration speeds and configurations. Fast-migrating super-Earths (?{sub mig} ? 0.01-0.1 Myr) only have a modest effect on the protoplanetary embryos and planetesimals. Sufficient material survives to form rocky, Earth-like planets on orbits exterior to the super-Earths'. In contrast, slowly migrating super-Earths shepherd rocky material interior to their orbits and strongly deplete the terrestrial planet-forming zone. In this situation any Earth-sized planets in the habitable zone are extremely volatile-rich and are therefore probably not Earth-like.

  10. Convergence of microbial assimilations of soil carbon, nitrogen, phosphorus, and sulfur in terrestrial ecosystems

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Xu, Xiaofeng; Hui, Dafeng; King, Anthony Wayne; Song, Xia; Thornton, Peter E.; Zhang, Lihua

    2015-11-27

    How soil microbes assimilate carbon-C, nitrogen-N, phosphorus-P, and sulfur-S is fundamental for understanding nutrient cycling in terrestrial ecosystems. We compiled a global database of C, N, P, and S concentrations in soils and microbes and developed relationships between them by using a power function model. The C:N:P:S was estimated to be 287:17:1:0.8 for soils, and 42:6:1:0.4 for microbes. We found a convergence of the relationships between elements in soils and in soil microbial biomass across C, N, P, and S. The element concentrations in soil microbial biomass follow a homeostatic regulation curve with soil element concentrations across C, N, Pmore » and S, implying a unifying mechanism of microbial assimilating soil elements. This correlation explains the well-constrained C:N:P:S stoichiometry with a slightly larger variation in soils than in microbial biomass. Meanwhile, it is estimated that the minimum requirements of soil elements for soil microbes are 0.8 mmol C Kg–1 dry soil, 0.1 mmol N Kg–1 dry soil, 0.1 mmol P Kg–1 dry soil, and 0.1 mmol S Kg–1 dry soil, respectively. Lastly, these findings provide a mathematical explanation of element imbalance in soils and soil microbial biomass, and offer insights for incorporating microbial contribution to nutrient cycling into Earth system models.« less

  11. CONDITIONS OF PASSAGE AND ENTRAPMENT OF TERRESTRIAL PLANETS IN SPIN-ORBIT RESONANCES

    SciTech Connect (OSTI)

    Makarov, Valeri V.

    2012-06-10

    The dynamical evolution of terrestrial planets resembling Mercury in the vicinity of spin-orbit resonances is investigated using comprehensive harmonic expansions of the tidal torque taking into account the frequency-dependent quality factors and Love numbers. The torque equations are integrated numerically with a small step in time, including the oscillating triaxial torque components but neglecting the layered structure of the planet and assuming a zero obliquity. We find that a Mercury-like planet with a current value of orbital eccentricity (0.2056) is always captured in 3:2 resonance. The probability of capture in the higher 2:1 resonance is approximately 0.23. These results are confirmed by a semi-analytical estimation of capture probabilities as functions of eccentricity for both prograde and retrograde evolutions of spin rate. As follows from analysis of equilibrium torques, entrapment in 3:2 resonance is inevitable at eccentricities between 0.2 and 0.41. Considering the phase space parameters at the times of periastron, the range of spin rates and phase angles for which an immediate resonance passage is triggered is very narrow, and yet a planet like Mercury rarely fails to align itself into this state of unstable equilibrium before it traverses 2:1 resonance.

  12. Biotransformation and Incorporation into Proteins along a Simulated Terrestrial Food Chain

    SciTech Connect (OSTI)

    Unrine, J.M., B.P. Jackson and W.A. Hopkins

    2007-01-01

    Selenium is an essential trace element in vertebrates, but there is a narrow concentration range between dietary requirement and toxicity threshold. Although a great deal is known about the biochemistry of Se from a nutritional perspective, considerably less attention has been focused on the specific biochemistry of Se as an environmental toxicant. Recent advances in hyphenated analytical techniques have provided the capability of quantifying specific chemical forms of Se in biological tissues as well as the distribution of Se among macromolecules. We applied liquid chromatography coupled to inductively coupled plasma mass spectrometry to investigate biotransformations of selenomethionine along a simulated terrestrial food chain consisting of selenomethionine exposed crickets (Acheta domesticus) fed to western fence lizards (Sceloporus occidentalis). Evidence was obtained for selenomethionine biotransformation as well as for sex-specific differences in the metabolism of Se compounds and their subsequent incorporation into proteins in the lizard. The results demonstrate the complexities involved in trophic transfer of Se due to the potential for extensive biotransformation and the species- and even sex-specific nature of these biotransformations.

  13. Free Air C02 Enrichment (FACE) Research Data from the Oak Ridge FACE Site and Experiment on CO2 Enrichment of Sweetgum

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    The facility was established with support from the ORNL Director's R&D Fund and the Biological and Environmental Research program of the U. S. Department of Energy Office of Science. Additional support was provided by the Terrestrial Ecology and Global Change (TECO) program through the National Science Foundation. This project was part of the CO2 research network fostered by the Global Change and Terrestrial Ecosystems core project of the International Geosphere-Biosphere Programme. Results from the experiment contributed to the Terrestrial Ecosystem Response to Atmospheric and Climatic Change (TERACC) project, a 5-year initiative integrating experimental data and global change modeling. Data from the ORNL FACE experiment are being used in an model benchmarking activity at the National Center for Ecological Analysis and Synthesis. [Copied from http://face.ornl.gov/goals.html

  14. Research Groups - Cyclotron Institute

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Research Groups Research Group Homepages: Nuclear Theory Group Dr. Sherry Yennello's Research Group Dr. Dan Melconian's Research Group Dr. Cody Folden's Group...

  15. ASU EFRC - Center researchers

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Center researchers Chad Simmons Academic Professional Gerdenis Kodis Research Assistant Professor Raimund Fromme Faculty Research Associate Yuichi Terazono Faculty Research Associate

  16. ARM - Research Themes

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    govScienceResearch Themes Science Research Themes Research Highlights Journal Articles Collaborations Atmospheric System Research (ASR) Earth System Modeling Regional & Global...

  17. DOE-STD-1153-2002; A Graded Approach for Evaluating Radiation Doses to Aquatic and Terrestrial Biota

    National Nuclear Security Administration (NNSA)

    STD-1153-2002 A Graded Approach for Evaluating Radiation Doses to Aquatic and Terrestrial Biota MODULE 1 PRINCIPLES AND APPLICATION MODULE 1: PRINCIPLES AND APPLICATION DOE-STD-1153-2002 INTENTIONALLY BLANK DOE-STD-1153-2002 M1-1 1 Introduction The U.S. Department of Energy (DOE) is accountable to Congress and the public for the safe conduct of its activities, including facility operation, waste management and disposal activities, and remediation of environmental contamination. These routine

  18. Sensitivity of Global Terrestrial Gross Primary Production to Hydrologic States Simulated by the Community Land Model Using Two Runoff Parameterizations

    SciTech Connect (OSTI)

    Lei, Huimin; Huang, Maoyi; Leung, Lai-Yung R.; Yang, Dawen; Shi, Xiaoying; Mao, Jiafu; Hayes, Daniel J.; Schwalm, C.; Wei, Yaxing; Liu, Shishi

    2014-09-01

    The terrestrial water and carbon cycles interact strongly at various spatio-temporal scales. To elucidate how hydrologic processes may influence carbon cycle processes, differences in terrestrial carbon cycle simulations induced by structural differences in two runoff generation schemes were investigated using the Community Land Model 4 (CLM4). Simulations were performed with runoff generation using the default TOPMODEL-based and the Variable Infiltration Capacity (VIC) model approaches under the same experimental protocol. The comparisons showed that differences in the simulated gross primary production (GPP) are mainly attributed to differences in the simulated leaf area index (LAI) rather than soil moisture availability. More specifically, differences in runoff simulations can influence LAI through changes in soil moisture, soil temperature, and their seasonality that affect the onset of the growing season and the subsequent dynamic feedbacks between terrestrial water, energy, and carbon cycles. As a result of a relative difference of 36% in global mean total runoff between the two models and subsequent changes in soil moisture, soil temperature, and LAI, the simulated global mean GPP differs by 20.4%. However, the relative difference in the global mean net ecosystem exchange between the two models is small (2.1%) due to competing effects on total mean ecosystem respiration and other fluxes, although large regional differences can still be found. Our study highlights the significant interactions among the water, energy, and carbon cycles and the need for reducing uncertainty in the hydrologic parameterization of land surface models to better constrain carbon cycle modeling.

  19. Quality Assurance Plan for Field Activities at the Natural and Accelerated Bioremediation Research (NABIR) Field Research Center (FRC), Oak Ridge, Tennessee

    SciTech Connect (OSTI)

    Brandt, C.C.

    2002-02-28

    The Environmental Sciences Division (ESD) at Oak Ridge National Laboratory (ORNL) has established a Natural and Accelerated Bioremediation Research (NABIR) program Field Research Center (FRC) for the U.S. Department of Energy (DOE) Office of Biological and Environmental Research. The FRC is located in Bear Creek Valley within the Y-12 Plant area of responsibility on DOE's Oak Ridge Reservation in Tennessee. The NABIR program is a long-term effort designed to increase the understanding of fundamental biogeochemical processes that would allow the use of bioremediation approaches for cleaning up DOE's contaminated legacy waste sites. The FRC provides a site for investigators in the NABIR program to conduct research and obtain samples related to in situ bioremediation. The FRC is integrated with existing and future laboratory and field research and provides a means of examining the biogeochemical processes that influence bioremediation under controlled small-scale field conditions. This Quality Assurance Plan (QAP) documents the quality assurance protocols for field and laboratory activities performed by the FRC staff. It supplements the requirements in the ORNL Nuclear Quality Assurance Program and the ESD Quality Assurance Program. The QAP addresses the requirements in Title 10 CFR, Part 830 Subpart A, ''Quality Assurance Requirements'', using a graded approach appropriate for Research and Development projects based on guidance from ''Implementation Guide for Quality Assurance Programs for Basic and Applied Research'' (DOE-ER-STD-6001-92). It also supports the NABIR FRC Management Plan (Watson and Quarles 2000a) which outlines the overall procedures, roles and responsibilities for conducting research at the FRC. The QAP summarizes the organization, work activities, and qualify assurance and quality control protocols that will be used to generate scientifically defensible data at the FRC. The QAP pertains to field measurements and sample collection conducted by the FRC to characterize the site and in support of NABIR-funded investigations at the FRC. NABIR investigators who collect their own samples or measurements at the FRC will be responsible for developing their own data quality assurance protocol. Notably, this QAP will be of direct benefit to NABIR investigators who will be provided with and use the documented quality data about the FRC to support their investigations.

  20. Sandia National Laboratories: Research: Research Foundations

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Research Foundations Bioscience Computing and Information Science Electromagnetics Engineering Science Geoscience Materials Science Nanodevices and Microsystems Radiation Effects and High Energy Density Science Research Research Foundations Leadership in innovation Integrating unique resources and technical excellence to benefit our nation. Certain research areas are considered key to the success of Sandia's national security programs. These areas - known as research foundations - underpin

  1. Terrestrial fate of coal-liquid constituents: behavior of alkyl anilines in soil

    SciTech Connect (OSTI)

    Felice, L.J.; Zachara, J.M.; Rogers, J.E.

    1982-07-01

    The low molecular weight aromatic amines (anilines) are important water soluble constituents of coal liquids. The impact of anilines released to the terrestrial environment will largely depend on their mobility and persistence. Studies were conducted to investigate those processes governing the mobility and persistence of the alkylanilines, namely, soil sorption and chemical/microbial degradation. Soil sorption measurements were conducted on aniline and several methyl substituted anilines on A and B horizons of a soil profile collected from Davies County, Kentucky. The magnitude of sorption was large in all horizons. Sorption in the B horizons was larger than in the A horizon for many of the anilines studied, indicating the importance of both the mineral matrix and organic carbon content of the soil in determining the magnitude of sorption. Results of these measurements indicate that movement of the anilines through the soil would be significantly attenuated by sorption reactions. Aniline sorption measurement in the A horizon after removal of the organic matter and in the B/sub 22/ horizon after removal of amorphous iron oxides and crystalline iron oxides indicate that organic matter largely controls aniline sorption in the A horizon, while crystalline iron oxides and phyllosilicates are important in the B horizons. The effects of pH on aniline sorption was also examined and shown to have significant effects on the magnitude of sorption in both A and B horizons. Soil degradation studies using /sup 14/C-3-methylaniline as a model for alkyl aniline degradation show that 3-methylaniline is readily metabolized by soil microorganisms during the 32-day period examined.

  2. THE INFLUENCE OF THERMAL EVOLUTION IN THE MAGNETIC PROTECTION OF TERRESTRIAL PLANETS

    SciTech Connect (OSTI)

    Zuluaga, Jorge I.; Bustamante, Sebastian; Cuartas, Pablo A.; Hoyos, Jaime H. E-mail: sbustama@pegasus.udea.edu.co E-mail: jhhoyos@udem.edu.co

    2013-06-10

    Magnetic protection of potentially habitable planets plays a central role in determining their actual habitability and/or the chances of detecting atmospheric biosignatures. Here we develop a thermal evolution model of potentially habitable Earth-like planets and super-Earths (SEs). Using up-to-date dynamo-scaling laws, we predict the properties of core dynamo magnetic fields and study the influence of thermal evolution on their properties. The level of magnetic protection of tidally locked and unlocked planets is estimated by combining simplified models of the planetary magnetosphere and a phenomenological description of the stellar wind. Thermal evolution introduces a strong dependence of magnetic protection on planetary mass and rotation rate. Tidally locked terrestrial planets with an Earth-like composition would have early dayside magnetopause distances between 1.5 and 4.0 R{sub p} , larger than previously estimated. Unlocked planets with periods of rotation {approx}1 day are protected by magnetospheres extending between 3 and 8 R{sub p} . Our results are robust in comparison with variations in planetary bulk composition and uncertainties in other critical model parameters. For illustration purposes, the thermal evolution and magnetic protection of the potentially habitable SEs GL 581d, GJ 667Cc, and HD 40307g were also studied. Assuming an Earth-like composition, we found that the dynamos of these planets are already extinct or close to being shut down. While GL 581d is the best protected, the protection of HD 40307g cannot be reliably estimated. GJ 667Cc, even under optimistic conditions, seems to be severely exposed to the stellar wind, and, under the conditions of our model, has probably suffered massive atmospheric losses.

  3. Actual versus predicted impacts of three ethanol plants on aquatic and terrestrial resources

    SciTech Connect (OSTI)

    Eddlemon, G.K.; Webb, J.W.; Hunsaker, D.B. Jr.; Miller, R.L.

    1993-03-15

    To help reduce US dependence on imported petroleum, Congress passed the Energy Security Act of 1980 (public Law 96-294). This legislation authorized the US Department of Energy (DOE) to promote expansion of the fuel alcohol industry through, among other measures, its Alcohol Fuels Loan Guarantee Program. Under this program, selected proposals for the conversion of plant biomass into fuel-grade ethanol would be granted loan guarantees. of 57 applications submitted for loan guarantees to build and operate ethanol fuel projects under this program, 11 were considered by DOE to have the greatest potential for satisfying DOE`s requirements and goals. In accordance with the National Environmental Policy Act (NEPA), DOE evaluated the potential impacts of proceeding with the Loan Guarantee Program in a programmatic environmental assessment (DOE 1981) that resulted in a finding of no significant impact (FANCY) (47 Federal Register 34, p. 7483). The following year, DOE conducted site-specific environmental assessments (EAs) for 10 of the proposed projects. These F-As predicted no significant environmental impacts from these projects. Eventually, three ethanol fuel projects received loan guarantees and were actually built: the Tennol Energy Company (Tennol; DOE 1982a) facility near Jasper in southeastern Tennessee; the Agrifuels Refining Corporation (Agrifuels; DOE 1985) facility near New Liberia in southern Louisiana; and the New Energy Company of Indiana (NECI; DOE 1982b) facility in South Bend, Indiana. As part of a larger retrospective examination of a wide range of environmental effects of ethanol fuel plants, we compared the actual effects of the three completed plants on aquatic and terrestrial resources with the effects predicted in the NEPA EAs several years earlier. A secondary purpose was to determine: Why were there differences, if any, between actual effects and predictions? How can assessments be improved and impacts reduced?

  4. Associate Research Physicist (Post Doc, Experimental Research...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Post Doc, Experimental Research, NSTX-U, Radio Frequency Waves) Department: Research Staff: RM1 Requisition Number: 1500421 The Princeton Plasma Physics Laboratory (PPPL) seeks to...

  5. Monitoring Uranium Transformations Determined by the Evolution of Biogeochemical Processes: Design of Mixed Batch Reactor and Column Studies at Oak Ridge National Laboratory

    SciTech Connect (OSTI)

    Criddle, Craig S.; Wu, Weimin

    2013-04-17

    With funds provided by the US DOE, Argonne National Laboratory subcontracted the design of batch and column studies to a Stanford University team with field experience at the ORNL IFRC, Oak Ridge, TN. The contribution of the Stanford group ended in 2011 due to budget reduction in ANL. Over the funded research period, the Stanford research team characterized ORNL IFRC groundwater and sediments and set up microcosm reactors and columns at ANL to ensure that experiments were relevant to field conditions at Oak Ridge. The results of microcosm testing demonstrated that U(VI) in sediments was reduced to U(IV) with the addition of ethanol. The reduced products were not uraninite but were instead U(IV) complexes associated with Fe. Fe(III) in solid phase was only partially reduced. The Stanford team communicated with the ANL team members through email and conference calls and face to face at the annual ERSP PI meeting and national meetings.

  6. BIO-MONITORING FOR URANIUM USING STREAM-SIDE TERRESTRIAL PLANTS AND MACROPHYTES

    SciTech Connect (OSTI)

    Caldwell, E.; Duff, M.; Hicks, T.; Coughlin, D.; Hicks, R.; Dixon, E.

    2012-01-12

    This study evaluated the abilities of various plant species to act as bio-monitors for environmental uranium (U) contamination. Vegetation and soil samples were collected from a U processing facility. The water-way fed from facility storm and processing effluents was the focal sample site as it represented a primary U transport mechanism. Soils and sediments from areas exposed to contamination possessed U concentrations that averaged 630 mg U kg{sup -1}. Aquatic mosses proved to be exceptional accumulators of U with dry weight (dw) concentrations measuring as high as 12500 mg U kg{sup -1} (approximately 1% of the dw mass was attributable to U). The macrophytes (Phragmites communis, Scripus fontinalis and Sagittaria latifolia) were also effective accumulators of U. In general, plant roots possessed higher concentrations of U than associated upper portions of plants. For terrestrial plants, the roots of Impatiens capensis had the highest observed levels of U accumulation (1030 mg kg{sup -1}), followed by the roots of Cyperus esculentus and Solidago speciosa. The concentration ratio (CR) characterized dry weight (dw) vegetative U levels relative to that in associated dw soil. The plant species that accumulated U at levels in excess of that found in the soil were: P. communis root (CR, 17.4), I. capensis root (CR, 3.1) and S. fontinalis whole plant (CR, 1.4). Seven of the highest ten CR values were found in the roots. Correlations with concentrations of other metals with U were performed, which revealed that U concentrations in the plant were strongly correlated with nickel (Ni) concentrations (correlation: 0.992; r-squared: 0.984). Uranium in plant tissue was also strongly correlated with strontium (Sr) (correlation: 0.948; r-squared: 0.899). Strontium is chemically and physically similar to calcium (Ca) and magnesium (Mg), which were also positively-correlated with U. The correlation with U and these plant nutrient minerals, including iron (Fe), suggests that active uptake mechanisms may influence plant U accumulation.

  7. ENHANCEMENT OF TERRESTRIAL CARBON SINKS THROUGH RECLAMATION OF ABANDONED MINE LANDS IN THE APPALACHIAN REGION

    SciTech Connect (OSTI)

    Gary D. Kronrad

    2002-12-01

    The U.S.D.I. Office of Surface Mining (OSM) estimates that there are approximately 1 million acres of abandoned mine land (AML) in the Appalachian region. AML lands are classified as areas that were inadequately reclaimed or were left unreclaimed prior to the passage of the 1977 Surface Mining Control and Reclamation Act, and where no federal or state laws require any further reclamation responsibility to any company or individual. Reclamation and afforestation of these sites have the potential to provide landowners with cyclical timber revenues, generate environmental benefits to surrounding communities, and sequester carbon in the terrestrial ecosystem. Through a memorandum of understanding, the OSM and the U.S. Department of Energy (DOE) have decided to investigate reclaiming and afforesting these lands for the purpose of mitigating the negative effects of anthropogenic carbon dioxide in the atmosphere. This study determined the carbon sequestration potential of northern red oak (Quercus rubra L.), one of the major reclamation as well as commercial species, planted on West Virginia AML sites. Analyses were conducted to (1) calculate the total number of tons that can be stored, (2) determine the cost per ton to store carbon, and (3) calculate the profitability of managing these forests for timber production alone and for timber production and carbon storage together. The Forest Management Optimizer (FORMOP) was used to simulate growth data on diameter, height, and volume for northern red oak. Variables used in this study included site indices ranging from 40 to 80 (base age 50), thinning frequencies of 0, 1, and 2, thinning percentages of 20, 25, 30, 35, and 40, and a maximum rotation length of 100 years. Real alternative rates of return (ARR) ranging from 0.5% to 12.5% were chosen for the economic analyses. A total of 769,248 thinning and harvesting combinations, net present worths, and soil expectation values were calculated in this study. Results indicate that the cost per ton to sequester carbon ranges from $6.54 on site index 80 land at a 12.5% ARR to $36.68 on site index 40 land at an ARR of 0.5%. Results also indicate that the amount of carbon stored during one rotation ranges between 38 tons per acre on site index 40 land to 58 tons per acre on site index 80 land. The profitability of afforestation on these AML sites in West Virginia increases as the market price for carbon increases from $0 to $100 per ton.

  8. Evaluate and characterize mechanisms controlling transport, fate and effects of army smokes in an aerosol wind tunnel: Transport, transformations, fate and terrestrial ecological effects of fog oil obscurant smokes: Final report

    SciTech Connect (OSTI)

    Cataldo, D.A.; Van Voris, P.; Ligotke, M.W.; Fellows, R.J.; McVeety, B.D.; Li, Shu-mei W.; Bolton, H. Jr.; Fredrickson, J.K.

    1989-01-01

    The terrestrial transport, chemical fate, and ecological effects of fog oil (FO) smoke obscurants were evaluated under controlled wind tunnel conditions. The primary objectives of this research program are to characterize and assess the impacts of smoke and obscurants on: (1) natural vegetation characteristic of US Army training sites in the United States; (2) physical and chemical properties of soils representative of these training sites; and (3) soil microbiological and invertebrate communities. Impacts and dose/responses were evaluated based on an exposure scenario, including exposure duration, exposure rate, and sequential cumulative dosing. Key to understanding the environmental impacts of fog oil smoke/obscurants is establishing the importance of environmental parameters, such as relative humidity and wind speed on airborne aerosol characteristics and deposition to receptor surfaces. Direct and indirect biotic effects were evaluated using five plant species and three soil types. 29 refs., 35 figs., 32 tabs.

  9. Research Input Form

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    HighlightsSubmit Form Submit a New Research Highlight Sort Highlights Submitter Title Research Area Working Group Submission Date DOE Progress Reports Notable Research Findings for...

  10. Global Biogeochemistry Models and Global Carbon Cycle Research at Lawrence Livermore National Laboratory

    SciTech Connect (OSTI)

    Covey, C; Caldeira, K; Guilderson, T; Cameron-Smith, P; Govindasamy, B; Swanston, C; Wickett, M; Mirin, A; Bader, D

    2005-05-27

    The climate modeling community has long envisioned an evolution from physical climate models to ''earth system'' models that include the effects of biology and chemistry, particularly those processes related to the global carbon cycle. The widely reproduced Box 3, Figure 1 from the 2001 IPCC Scientific Assessment schematically describes that evolution. The community generally accepts the premise that understanding and predicting global and regional climate change requires the inclusion of carbon cycle processes in models to fully simulate the feedbacks between the climate system and the carbon cycle. Moreover, models will ultimately be employed to predict atmospheric concentrations of CO{sub 2} and other greenhouse gases as a function of anthropogenic and natural processes, such as industrial emissions, terrestrial carbon fixation, sequestration, land use patterns, etc. Nevertheless, the development of coupled climate-carbon models with demonstrable quantitative skill will require a significant amount of effort and time to understand and validate their behavior at both the process level and as integrated systems. It is important to consider objectively whether the currently proposed strategies to develop and validate earth system models are optimal, or even sufficient, and whether alternative strategies should be pursued. Carbon-climate models are going to be complex, with the carbon cycle strongly interacting with many other components. Off-line process validation will be insufficient. As was found in coupled atmosphere-ocean GCMs, feedbacks between model components can amplify small errors and uncertainties in one process to produce large biases in the simulated climate. The persistent tropical western Pacific Ocean ''double ITCZ'' and upper troposphere ''cold pole'' problems are examples. Finding and fixing similar types of problems in coupled carbon-climate models especially will be difficult, given the lack of observations required for diagnosis and validation of biogeochemical processes.

  11. PHOTOCHEMISTRY IN TERRESTRIAL EXOPLANET ATMOSPHERES. II. H{sub 2}S AND SO{sub 2} PHOTOCHEMISTRY IN ANOXIC ATMOSPHERES

    SciTech Connect (OSTI)

    Hu Renyu; Seager, Sara; Bains, William

    2013-05-20

    Sulfur gases are common components in the volcanic and biological emission on Earth, and are expected to be important input gases for atmospheres on terrestrial exoplanets. We study the atmospheric composition and the spectra of terrestrial exoplanets with sulfur compounds (i.e., H{sub 2}S and SO{sub 2}) emitted from their surfaces. We use a comprehensive one-dimensional photochemistry model and radiative transfer model to investigate the sulfur chemistry in atmospheres ranging from reducing to oxidizing. The most important finding is that both H{sub 2}S and SO{sub 2} are chemically short-lived in virtually all types of atmospheres on terrestrial exoplanets, based on models of H{sub 2}, N{sub 2}, and CO{sub 2} atmospheres. This implies that direct detection of surface sulfur emission is unlikely, as their surface emission rates need to be extremely high (>1000 times Earth's volcanic sulfur emission) for these gases to build up to a detectable level. We also find that sulfur compounds emitted from the surface lead to photochemical formation of elemental sulfur and sulfuric acid in the atmosphere, which would condense to form aerosols if saturated. For terrestrial exoplanets in the habitable zone of Sun-like stars or M stars, Earth-like sulfur emission rates result in optically thick haze composed of elemental sulfur in reducing H{sub 2}-dominated atmospheres for a wide range of particle diameters (0.1-1 {mu}m), which is assumed as a free parameter in our simulations. In oxidized atmospheres composed of N{sub 2} and CO{sub 2}, optically thick haze, composed of elemental sulfur aerosols (S{sub 8}) or sulfuric acid aerosols (H{sub 2}SO{sub 4}), will form if the surface sulfur emission is two orders of magnitude more than the volcanic sulfur emission of Earth. Although direct detection of H{sub 2}S and SO{sub 2} by their spectral features is unlikely, their emission might be inferred by observing aerosol-related features in reflected light with future generation space telescopes.

  12. Interactive effects of maternal and environmental exposure to coal combustion wastes decrease survival of larval southern toads (Bufo terrestris)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Interactive effects of maternal and environmental exposure to coal combustion wastes decrease survival of larval southern toads (Bufo terrestris) Brian S. Metts a, * , Kurt A. Buhlmann a , David E. Scott a , Tracey D. Tuberville a , William A. Hopkins b a Savannah River Ecology Laboratory, Drawer E, Aiken, SC 29802, USA b Department of Fish and Wildlife Conservation, Virginia Tech, Blacksburg, VA 24061, USA a r t i c l e i n f o Article history: Received 16 August 2011 Received in revised form

  13. DOE-STD-1153-2002; A Graded Approach for Evaluating Radiation Doses to Aquatic and Terrestrial Biota

    Office of Environmental Management (EM)

    1153-2002 July 2002 DOE STANDARD A GRADED APPROACH FOR EVALUATING RADIATION DOSES TO AQUATIC AND TERRESTRIAL BIOTA U.S. Department of Energy AREA ENVR Washington, D.C. 20585 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. This document has been reproduced from the best available copy. Available to DOE and DOE contractors from ES&H Technical Information Services, U.S. Department of Energy, (800) 473-4375, fax: (301) 903-9823. Available to the public from the

  14. Advanced Scientific Computing Research

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Advanced Scientific Computing Research Advanced Scientific Computing Research Discovering, developing, and deploying computational and networking capabilities to analyze, model,...

  15. Research Affiliates | Photosynthetic Antenna Research Center

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Affiliates Research Affiliates Yan Mei Wang Yan Mei Wang Research Affiliate Read more about Yan Mei Wang Rienk van Grondelle Rienk van Grondelle Research Affiliate Read more about Rienk van Grondelle Jakub Pšenčík Jakub Pšenčík Read more about Jakub Pšenčík Hugh O'Neill Hugh O'Neill Research Affiliate Read more about Hugh O'Neill David Kramer David Kramer Research Affiliate Read more about David Kramer Cynthia Lo Cynthia Lo Research Affiliate Read more about Cynthia Lo Noam Adir Noam

  16. Research Affiliates | Photosynthetic Antenna Research Center

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Engel Gregory Engel Research Affiliate E-mail: gsengel@uchicago.edu Phone: 773.834.0818 Harry Frank Harry Frank Research Affiliate E-mail: harry.frank@uconn.edu Phone: 860.486.2844...

  17. Research Form | Photosynthetic Antenna Research Center

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Research Form Research Form Students may arrange to receive credit and/or choose to receive points toward the PARC/I-CARES certificate through research in a faculty-supervised laboratory. The student is expected to pursue studies or outside activities that are supervised by a faculty advisor or sponsor. Washington University schools and departments require their own separate forms to be completed by students seeking credit for a research project. Students are expected to obtain and complete

  18. GE Global Research Leadership | GE Global Research

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    About GE Global Research > Leadership Leadership GE Global Research Centers rely on the guidance of visionary leaders with deep technical knowledge on the ground at each of our sites. A photo of Vic Abate Vic Abate Chief Technology Officer GE Global Research As senior vice president and chief technology officer for GE, Vic is responsible for one of the world's largest and most diversified industrial research and technology organizations. Vic leads GE's 50,000 engineers and scientists and G...

  19. NREL: Concentrating Solar Power Research - Research Expertise

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Research Expertise NREL's research expertise in concentrating solar power technologies includes managing and supporting parabolic trough research and development (R&D); using a systems-driven modeling and analysis approach; and developing advanced components and technologies. Managing and Supporting Parabolic Trough R&D NREL has lead responsibility for managing, directing, and supporting parabolic trough R&D activities. In-house and subcontracted research and development supports the

  20. Sandia National Laboratories: Research: Research Foundations: Engineering

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Science Research Foundations Bioscience Computing and Information Science Electromagnetics Engineering Science Geoscience Materials Science Nanodevices and Microsystems Radiation Effects and High Energy Density Science Research Engineering Science The Engineering Science Research Foundation is leading engineering transitions in advanced, highly critical systems by integrating theory development, experimental discovery and diagnostics, modeling, and computational approaches to refine our

  1. Sandia National Laboratories: Research: Research Foundations: Geoscience

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Geoscience Bioscience Computing and Information Science Electromagnetics Engineering Science Geoscience Materials Science Nanodevices and Microsystems Radiation Effects and High Energy Density Science Research Geoscience Geoscience photo The Geoscience Research Foundation performs recognized world-class earth and atmospheric sciences research and development to support Sandia's national security missions. Why our work matters Knowledge of the Earth's subsurface properties, structure and

  2. Evaluate and characterize mechanisms controlling transport, fate, and effects of army smokes in the aerosol wind tunnel: Transport, transformations, fate, and terrestrial ecological effects of hexachloroethane obscurant smokes

    SciTech Connect (OSTI)

    Cataldo, D.A.; Ligotke, M.W.; Bolton, H. Jr.; Fellows, R.J.; Van Voris, P.; McVeety, B.D.; Li, Shu-mei W.; McFadden, K.M.

    1989-09-01

    The terrestrial transport, chemical fate, and ecological effects of hexachloroethane (HC) smoke were evaluated under controlled wind tunnel conditions. The primary objectives of this research program are to characterize and assess the impacts of smoke and obscurants on: (1) natural vegetation characteristic of US Army training sites in the United States; (2) physical and chemical properties of soils representative of these training sites; and (3) soil microbiological and invertebrate communities. Impacts and dose/responses were evaluated based on exposure scenarios, including exposure duration, exposure rate, and sequential cumulative dosing. Key to understanding the environmental impacts of HC smoke/obscurants is establishing the importance of environmental parameters such as relative humidity and wind speed on airborne aerosol characteristics and deposition to receptor surfaces. Direct and indirect biotic effects were evaluated using five plant species and two soil types. HC aerosols were generated in a controlled atmosphere wind tunnel by combustion of hexachloroethane mixtures prepared to simulate normal pot burn rates and conditions. The aerosol was characterized and used to expose plant, soil, and other test systems. Particle sizes of airborne HC ranged from 1.3 to 2.1 {mu}m mass median aerodynamic diameter (MMAD), and particle size was affected by relative humidity over a range of 20% to 85%. Air concentrations employed ranged from 130 to 680 mg/m{sup 3}, depending on exposure scenario. Chlorocarbon concentrations within smokes, deposition rates for plant and soil surfaces, and persistence were determined. The fate of principal inorganic species (Zn, Al, and Cl) in a range of soils was assessed.

  3. Overview of NASA supported Stirling thermodynamic loss research

    SciTech Connect (OSTI)

    Tew, R.C.; Geng, S.M.

    1994-09-01

    The National Aeronautics and Space Administration (NASA) is funding research to characterize Stirling machine thermodynamic losses. NASA`s primary goal is to improve Stirling design codes to support engine development for space and terrestrial power. However, much of the fundamental data is applicable to Stirling cooler and heat pump applications. The research results are reviewed. Much has been learned about oscillating-flow hydrodynamics, including laminar/turbulent transition, and tabulated data has been documented for further analysis. Now, with a better understanding of the oscillator-flow field, it is time to begin measuring the effects of oscillating flow and oscillating pressure level on heat transfer in heat exchanger flow passages and in cylinders. This critical phase of the work is just beginning.

  4. Climate Research Roadmap Workshop: Summary Report, May 13-14, 2010

    SciTech Connect (OSTI)

    2010-09-01

    In recognition of the ongoing advances and challenges of climate change research, DOE's Office of Biological and Environmental Research (BER) organized a workshop asking the scientific community to identify the current state of climate science. The goal of the workshop was to determine the research challenges important for developing a predictive understanding of global climate. Participants were asked to focus on interdisciplinary research that capitalized on BER's scientific strengths in Atmospheric System Research, Terrestrial Ecosystem Science, and Climate and Earth System Modeling. Approximately 50 scientists representing these three areas were asked to identify desired outcomes for the next 10 years. Goals were identified for the near (1--3 years), mid (4--7 years), and long term (8--10 years). Discussions were focused by discipline (atmospheric, terrestrial, and modeling) and by latitude (high, temperate, and tropical). In addition, opportunities and needs for integration across disciplines and latitudes were identified with a specific focus on crosscutting challenges and outcomes. BER will use this workshop output to update its strategic plan for climate research.

  5. Environmental effects research. Environmental Research Division annual report, January-December 1983. Part 3

    SciTech Connect (OSTI)

    Not Available

    1984-12-01

    The Terrestrial Ecology group continued its involvement in the National Crop Loss Assessment Network, and studies of O/sub 3/ effects on winter wheat and soybeans were completed. Experiments on O/sub 3/ x SO/sub 2/ interactions on soybeans were also performed. The Microcosms for Acid Rain Studies (MARS) project had its first full year of research and much information concerning acid rain impacts on soil-plant systems was collected. A study of the influence of temporal variations in rain acidity on soybean productivity was also initiated. The aquatic radiochemistry group continued measurements of the mobility of plutonium and americium at a disposal site at Los Alamos and initiated similar work at Hanford. Laboratory tracer experiments were carried out to study the adsorptive behavior of neptunium, the solubility limits of plutonium, and the influence of rare earth concentration on the sorption and redox behavior of plutonium. The soil-plant process group initiated several studies on the influence of mycorrhizae to host plants in disturbed and natural environments. Much of the past research has been concerned with understanding mycorrhizal fungi propagule dynamics as related to disturbances associated with energy extraction. Future research will be directed at understanding how below-ground symbiotic associations may increase the fitness of host plants. Emphasis is being placed on resource acquisition and compartmental strategies. Separate analytics have been indexed for EDB.

  6. Partnerships For Researchers - JCAP

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    077.jpg Partnerships For Researchers Connect With JCAP Contact Us Partnerships For Researchers Partnerships For Industry Visit JCAP partnerships for researchers Collaborations For collaboration opportunities: collaborate@solarfuelshub.org Employment JCAP offers rewarding career opportunities for research scientists, engineers, and professional and administrative staff. For additional information, please contact: opportunities@solarfuelshub.org. Graduate School JCAP offers exciting research

  7. Environmental Assessment for Selection and Operation of the Proposed Field Research Centers for the Natural and Accelerated Bioremediation Research (NABIR) Program

    SciTech Connect (OSTI)

    N /A

    2000-04-18

    The US Department of Energy (DOE) Office of Biological and Environmental Research (OBER), within the Office of Science (SC), proposes to add a Field Research Center (FRC) component to the existing Natural and Accelerated Bioremediation Research (NABIR) Program. The NABIR Program is a ten-year fundamental research program designed to increase the understanding of fundamental biogeochemical processes that would allow the use of bioremediation approaches for cleaning up DOE's contaminated legacy waste sites. An FRC would be integrated with the existing and future laboratory and field research and would provide a means of examining the fundamental biogeochemical processes that influence bioremediation under controlled small-scale field conditions. The NABIR Program would continue to perform fundamental research that might lead to promising bioremediation technologies that could be demonstrated by other means in the future. For over 50 years, DOE and its predecessor agencies have been responsible for the research, design, and production of nuclear weapons, as well as other energy-related research and development efforts. DOE's weapons production and research activities generated hazardous, mixed, and radioactive waste products. Past disposal practices have led to the contamination of soils, sediments, and groundwater with complex and exotic mixtures of compounds. This contamination and its associated costs and risks represents a major concern to DOE and the public. The high costs, long duration, and technical challenges associated with remediating the subsurface contamination at DOE sites present a significant need for fundamental research in the biological, chemical, and physical sciences that will contribute to new and cost-effective solutions. One possible low-cost approach for remediating the subsurface contamination of DOE sites is through the use of a technology known as bioremediation. Bioremediation has been defined as the use of microorganisms to biodegrade or biotransform hazardous organic contaminants to environmentally safe levels in soils, subsurface materials, water, sludges, and residues.. While bioremediation technology is promising, DOE managers and non-DOE scientists have recognized that the fundamental scientific information needed to develop effective bioremediation technologies for cleanup of the legacy waste sites is lacking in many cases. DOE believes that field-based research is needed to realize the full potential of bioremediation. The Department of Energy faces a unique set of challenges associated with cleaning up waste at its former weapons production and research sites. These sites contain complex mixtures of contaminants in the subsurface, including radioactive compounds. In many cases, the fundamental field-based scientific information needed to develop safe and effective remediation and cleanup technologies is lacking. DOE needs fundamental research on the use of microorganisms and their products to assist DOE in the decontamination and cleanup of its legacy waste sites. The existing NABIR program to-date has focused on fundamental scientific research in the laboratory. Because subsurface hydrologic and geologic conditions at contaminated DOE sites cannot easily be duplicated in a laboratory, however, the DOE needs a field component to permit existing and future laboratory research results to be field-tested on a small scale in a controlled outdoor setting. Such field-testing needs to be conducted under actual legacy waste field conditions representative of those that DOE is most in need of remediating. Ideally, these field conditions should be as representative as practicable of the types of subsurface contamination conditions that resulted from legacy wastes from the nuclear weapons program activities. They should also be representative of the types of hydrologic and geologic conditions that exist across the DOE complex.

  8. Sandia National Labs: PCNSC: Research: Research Briefs

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Research Briefs The annually published Physical, Chemical, and Nano Sciences Center Research Briefs highlights recent accomplishments supporting our missions. Our research focuses on five technical thrust areas: Science-based solutions for NNSA mission needs Collective hierarchical systems Compound semiconductors Nanosciences Optical sciences Issues 2009: View list of articles Download full issue (12.7MB PDF) 2008: View list of articles Download full issue (5.9MB PDF) 2007: View list of articles

  9. GE Global Research Contact | GE Global Research

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Contact Us Looking for more details? Please contact one of these individuals or visit the Newsroom for the latest information. Home > About GE Global Research > Contact Us GE Global Research 1 Research Circle, Niskayuna, NY 12309, USA Todd Alhart +1.518.387.7914 todd.alhart@ge.com Communications and Public Relations GE Brazil Technology Center Rio de Janeiro, Brazil Natalia Albuquerque +55 21 3548-6193 natalia.albuquerque@ge.com Communications and Public Relations GE China Technology

  10. GE Global Research Locations | GE Global Research

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Locations GE Global Research is innovating around the clock. Select one of our locations to learn more about operations there.GE Global Research is innovating around the clock. Select a location to learn more about our operations. Home > Locations GE Global Research is ALWAYS OPEN Already know about our locations? Experience a special look at a day in our life around the world! See What We're Doing Dhahran, Saudi Arabia Founded: 2015 Employees: 15 Focus Areas: Material Characterization,

  11. Research - Combustion Energy Frontier Research Center

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Research Research To facilitate better and more rapid coordination among the CEFRC members, Center research activities are organized into three Disciplinary Working Groups (DWGs) Chemistry: Theory (Coordinated by William H. Green) Chemistry: Experiment and Mechanisms (Coordinated by Hai Wang) Chemistry and Transport (Coordinated by Yiguang Ju) Additionally, the CEFRC has enlarged its scope of investigation by extending our prior focus on butanol to three unifying, thrust targets that define the

  12. GE Research and Development | GE Global Research

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    I Want to See Game-Changing Technology Work & Life Cool Science STEM Education Most Popular Shuffle Information for Me Game-Changing Technology Work & Life Cool Science STEM Education Most Popular Shuffle Dream team assembles to do the impossible at GRC » Thermal Science Leaders Are Also Researchers » The Dirt on the Cleanroom » Teaming Up With Idea Works Puts Our Tech Into the World » Unimpossible Missions Researchers Tackle the Impossible Unimpossible Missions: GE researchers prove

  13. Sandia National Laboratories: Research: Research Foundations...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Radiation Effects and High Energy Density Science Rings of Saturn, Sandia's workhorse pulsed-power machine. The Radiation Effects and High Energy Density Science Research...

  14. NREL: Wind Research - Research Staff Biographies

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ... He serves as a strategist and spokesperson for the national research programs to develop offshore renewables, such as wind, wave, tidal, and ocean current. Bob has received ...

  15. GE Global Research Careers | GE Global Research

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Finding solutions in energy, health and home, transportation and finance. Building, ... path at GE Global Research guides scientists' and engineers' individual development. ...

  16. ORISE: Worker Health Research

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    worker health research to assess the health of workers and other populations. Statistical methods, epidemiologic research and hazard assessments are core ORISE worker health...

  17. NREL: Biomass Research - Facilities

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Facilities At NREL's state-of-the-art biomass research facilities, researchers design and optimize processes to convert renewable biomass feedstocks into transportation fuels and...

  18. NREL: Biomass Research - Webmaster

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    to reply. Your name: Your email address: Your message: Send Message Printable Version Biomass Research Home Capabilities Projects Facilities Research Staff Working with Us Data &...

  19. ORISE: Postdoc Research Opportunities

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    federal research facilities nationwide For scientists who have recently completed their Ph.D. in a science or engineering discipline, a postdoc research position can make an...

  20. ORISE: Research Experiences

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Research Experiences Research Experiences The Oak Ridge Institute for Science and Education (ORISE) administers more than 150 science education programs on behalf of the U.S....

  1. ORISE: Undergraduate Research Experiences

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    participants with a better knowledge of their anticipated field of study. By conducting authentic research while networking with researchers and fellow students, participants...

  2. Research Facilities | NREL

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    and systems, ensuring integration with the U.S. electric grid. Learn more Integrated Biorefinery Research Facility (IBRF) Integrated Biorefinery Research Facility (IBRF) Work with...

  3. Biological and Environmental Research

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Cathy Wilson (505) 667-0202 Email Conducting research into sustainable biofuel production, ... The program conducts research into sustainable biofuel production, improved carbon ...

  4. Current Testbed Research

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Current Testbed Research Previous Testbed Research Proposal Process Terms and Conditions Dark Fiber Testbed Federated Testbed Circuits Test Circuit Service Performance (perfSONAR)...

  5. ORISE: Research Team Experiences

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Research Team Experiences The Oak Ridge Institute for Science and Education (ORISE) brings together mentors and research teams to serve as a bridge between the classroom and the...

  6. National Environmental Research Parks

    SciTech Connect (OSTI)

    Not Available

    1994-07-01

    The National Environmental Research Parks are outdoor laboratories that provide opportunities for environmental studies on protected lands that act as buffers around Department of Energy (DOE) facilities. The research parks are used to evaluate the environmental consequences of energy use and development as well as the strategies to mitigate these effects. They are also used to demonstrate possible environmental and land-use options. The seven parks are: Fermilab National Environmental Research Park; Hanford National Environmental Research Park; Idaho National Environmental Research Park; Los Alamos National Environmental Research Park; Nevada National Environmental Research Park; Oak Ridge National Environmental Research Park; and Savannah River National Environmental Research Park. This document gives an overview of the events that led to the creation of the research parks. Its main purpose is to summarize key points about each park, including ecological research, geological characteristics, facilities, and available databases.

  7. Shape of the terrestrial plasma sheet in the near-Earth magnetospheric tail as imaged by the Interstellar Boundary Explorer

    SciTech Connect (OSTI)

    Dayeh, M. A.; Fuselier, S. A.; Funsten, H. O.; McComas, D. J.; Ogasawara, K.; Petrinec, S. M.; Schwadron, N. A.; Valek, P.

    2015-04-11

    We present remote, continuous observations from the Interstellar Boundary Explorer of the terrestrial plasma sheet location back to -16 Earth radii (RE) in the magnetospheric tail using energetic neutral atom emissions. The time period studied includes two orbits near the winter and summer solstices, thus associated with large negative and positive dipole tilt, respectively. Continuous side-view images reveal a complex shape that is dominated mainly by large-scale warping due to the diurnal motion of the dipole axis. Superposed on the global warped geometry are short-time fluctuations in plasma sheet location that appear to be consistent with plasma sheet flapping and possibly twisting due to changes in the interplanetary conditions. We conclude that the plasma sheet warping due to the diurnal motion dominates the average shape of the plasma sheet. Over short times, the position of the plasma sheet can be dominated by twisting and flapping.

  8. A Carbon Flux Super Site. New Insights and Innovative Atmosphere-Terrestrial Carbon Exchange Measurements and Modeling

    SciTech Connect (OSTI)

    Leclerc, Monique Y.

    2014-11-17

    This final report presents the main activities and results of the project “A Carbon Flux Super Site: New Insights and Innovative Atmosphere-Terrestrial Carbon Exchange Measurements and Modeling” from 10/1/2006 to 9/30/2014. It describes the new AmeriFlux tower site (Aiken) at Savanna River Site (SC) and instrumentation, long term eddy-covariance, sodar, microbarograph, soil and other measurements at the site, and intensive field campaigns of tracer experiment at the Carbon Flux Super Site, SC, in 2009 and at ARM-CF site, Lamont, OK, and experiments in Plains, GA. The main results on tracer experiment and modeling, on low-level jet characteristics and their impact on fluxes, on gravity waves and their influence on eddy fluxes, and other results are briefly described in the report.

  9. Shape of the terrestrial plasma sheet in the near-Earth magnetospheric tail as imaged by the Interstellar Boundary Explorer

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Dayeh, M. A.; Fuselier, S. A.; Funsten, H. O.; McComas, D. J.; Ogasawara, K.; Petrinec, S. M.; Schwadron, N. A.; Valek, P.

    2015-04-11

    We present remote, continuous observations from the Interstellar Boundary Explorer of the terrestrial plasma sheet location back to -16 Earth radii (RE) in the magnetospheric tail using energetic neutral atom emissions. The time period studied includes two orbits near the winter and summer solstices, thus associated with large negative and positive dipole tilt, respectively. Continuous side-view images reveal a complex shape that is dominated mainly by large-scale warping due to the diurnal motion of the dipole axis. Superposed on the global warped geometry are short-time fluctuations in plasma sheet location that appear to be consistent with plasma sheet flapping andmore » possibly twisting due to changes in the interplanetary conditions. We conclude that the plasma sheet warping due to the diurnal motion dominates the average shape of the plasma sheet. Over short times, the position of the plasma sheet can be dominated by twisting and flapping.« less

  10. The North American Carbon Program Multi-scale synthesis and Terrestrial Model Intercomparison Project Part 1: Overview and experimental design

    SciTech Connect (OSTI)

    Huntzinger, D.N.; Schwalm, C.; Michalak, A.M; Schaefer, K.; King, A.W.; Wei, Y.; Jacobson, A.; Liu, S.; Cook, R.; Post, W.M.; Berthier, G.; Hayes, D.; Huang, M.; Ito, A.; Lei, H.; Lu, C.; Mao, J.; Peng, C.H.; Peng, S.; Poulter, B.; Riccuito, D.; Shi, X.; Tian, H.; Wang, W.; Zeng, N.; Zhao, F.; Zhu, Q.

    2013-01-01

    Terrestrial biosphere models (TBMs) have become an integral tool for extrapolating local observations and understanding of land-atmosphere carbon exchange to larger regions. The North American Carbon Program (NACP) Multi-scale synthesis and Terrestrial Model Intercomparison Project (MsTMIP) is a formal model intercomparison and evaluation effort focused on improving the diagnosis and attribution of carbon exchange at regional and global scales. MsTMIP builds upon current and past synthesis activities, and has a unique framework designed to isolate, interpret, and inform understanding of how model structural differences impact estimates of carbon uptake and release. Here we provide an overview of the MsTMIP effort and describe how the MsTMIP experimental design enables the assessment and quantification of TBM structural uncertainty. Model structure refers to the types of processes considered (e.g. nutrient cycling, disturbance, lateral transport of carbon), and how these processes are represented (e.g. photosynthetic formulation, temperature sensitivity, respiration) in the models. By prescribing a common experimental protocol with standard spin-up procedures and driver data sets, we isolate any biases and variability in TBM estimates of regional and global carbon budgets resulting from differences in the models themselves (i.e. model structure) and model-specific parameter values. An initial intercomparison of model structural differences is represented using hierarchical cluster diagrams (a.k.a. dendrograms), which highlight similarities and differences in how models account for carbon cycle, vegetation, energy, and nitrogen cycle dynamics. We show that, despite the standardized protocol used to derive initial conditions, models show a high degree of variation for GPP, total living biomass, and total soil carbon, underscoring the influence of differences in model structure and parameterization on model estimates.

  11. Summer Research Fellowships

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Los Alamos National Laboratory LANL Menu National Security Education Center Post Doctoral Fellows Program Application Process & Eligibility Selection Process Reporting Requirements Summer Research Fellowships NSEC » Seaborg Institute » Summer Research Fellowships Summer Research Fellowships Research Fellowships will be offered in Nuclear and Radiochemistry and Actinide Science. Contacts Director Albert Migliori Deputy Franz Freibert 505 667-6879 Email Professional Staff Assistant Susan

  12. Crosscutting Technology Research FAQs

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    Crosscutting Technology Research FAQs faq-header-big.jpg CROSSCUTTING - BASICS Q: What is the Crosscutting Technology Research Program? A: The Crosscutting Technology Research Program focuses on enabling technologies that foster transformational developments across multiple disciplines to support energy system platforms in power system design, construction, and operation for highly efficient operation and superior environmental performance. By bridging the gap between fundamental research and

  13. Postdoc Research Day

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    Research Day Postdoc Research Day Point your career towards Los Alamos Lab: work with the best minds on the planet in an inclusive environment that is rich in intellectual vitality and opportunities for growth. Contact Postdoc Program Office Email Postdoc Research Day 2014 At Postdoc Research Day 2014, 106 postdocs showcased their research. The Keynote Speakers for the event were Carol Burns, Deputy Principal Associate Director of Science, Technology, and Engineering, and Jeanette Roberts, Dean

  14. Research Highlights - JCAP

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    Research Highlights Research Why Solar Fuels Goals & Objectives Thrust 1 Thrust 2 Thrust 3 Thrust 4 Publications Research Highlights Videos Innovations User Facilities Expert Team Benchmarking Database Device Simulation Tool XPS Spectral Database Research Introduction Why Solar Fuels? Goals & Objectives Thrusts Thrust 1 Thrust 2 Thrust 3 Thrust 4 Library Publications Research Highlights Videos Resources User Facilities Expert Team Benchmarking Database Device Simulation Tool XPS Spectral

  15. Postdoc Research Day

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    Research Day Postdoc Research Day Point your career towards Los Alamos Lab: work with the best minds on the planet in an inclusive environment that is rich in intellectual vitality and opportunities for growth. Contact Postdoc Program Office Email Present research, receive feedback, enhance collaboration and technical discussions Los Alamos Postdoc Research Day is a Laboratory-wide event at which postdocs are provided the opportunity to present a summary of their Los Alamos research, receive

  16. Fellows' Prize for Research

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    Research Fellows' Prize for Research Demonstrating outstanding research in science or engineering. Fellows' Prize for Research Recipients Citations used where available 2014 Patrick Chain of Bioenergy and Biome Sciences (B-11) provides a high level of performance, broad scientist achievement and leadership in bioinformatics and genomic sciences. He has worked with the Naval Medical Research Center to develop the Empowering the Development of Geonomic Expertise (EDGE), which has raised the

  17. Applied Research Center

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    ARC Privacy and Security Notice Skip over navigation Search the JLab Site Applied Research Center Please upgrade your browser. This site's design is only visible in a graphical browser that supports web standards, but its content is accessible to any browser. Concerns? Applied Research Center ARC Home Consortium News EH&S Reports print version ARC Resources Commercial Tenants ARC Brochure Library Conference Room Applied Research Center Applied Research Center front view Applied Research

  18. NETL: Onsite Research

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    On-site Research onsite intro video ORD's Director Presents an Overview of NETL's Onsite Research A National Energy R&D Resource since 1910 As the lead laboratory for DOE's Office of Fossil Energy, NETL relies on a strong onsite research program conducted by federal scientists and engineers working in partnership with academia, other research institutions, and the private sector. NETL's Office of Research and Development (ORD) provides the science and engineering basis for next generation

  19. Southern Research Institute Visit

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    initiates collaboration between Southern Research Institute(SRI) and LSU CAMD hosted visitors from the Southern Research Institute in Birmingham, Alabama, and researchers from LSU Tuesday, December 7, 2010. Interim Director Richard Kurtz gave a short tour of the CAMD facility. Later, presentations were given by SRI, and LSU researchers. The SRI, and CAMD presentations are listed below, in .pdf format. Southern Reaserch Engineering Capabilities Briefing 2010 Southern Research Institute

  20. Research in progress: FY 1992. Summaries of projects

    SciTech Connect (OSTI)

    Not Available

    1993-08-01

    The Biological and Environmental Research (BER) Program of OHER has two main missions: (1) to develop the knowledge base necessary to identify, understand, and anticipate the long-term health and environmental consequences of energy use and development and (2) to utilize the Department`s unique scientific and technological capabilities to solve major scientific problems in medicine, biology, and the environment. These missions reflect a commitment to develop the beneficial uses of advanced energy technologies while at the same time assuring that any potentially adverse health and environmental impacts of the Nation`s energy policies are fully identified and understood. The BER Program includes research in atmospheric, marine, and terrestrial processes, including the linkage between the use in greenhouse gases, carbon dioxide, and regional and global climate change; in molecular and subcellular mechanisms underlying human somatic and genetic processes and their responses to energy-related environmental toxicants; in nuclear medicine, structural biology, the human genome, measurement sciences and instrumentation, and other areas that require the unique capabilities of the Department`s laboratory system. The principal areas of research are Health Research and Environmental Research.