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Sample records for association anwr arctic

  1. Analysis of Oil and Gas Production in the Arctic National Wildlife Refuge

    Reports and Publications (EIA)

    2004-01-01

    This study analyzed the impact on future oil imports and expenditures of opening the Arctic National Wildlife Refuge (ANWR) to petroleum development. High, low, and mean ANWR oil resource case projections were compared to the Annual Energy Outlook 2004 reference case. The study also examined whether potential synergies exist in opening ANWR to petroleum development and the construction of an Alaska gas pipeline from the North Slope to the lower 48 states.

  2. Analysis of Crude Oil Production in the Arctic National Wildlife Refuge

    Reports and Publications (EIA)

    2008-01-01

    This report responds to a request from Senator Ted Stevens that the Energy Information Administration provide an assessment of federal oil and natural gas leasing in the coastal plain of the Arctic National Wildlife Refuge (ANWR) in Alaska.

  3. Potential Oil Production from Coastal Plain of Arctic National Wildlife Refuge: Updated Assessment

    Reports and Publications (EIA)

    2000-01-01

    The Energy Information Administration (EIA) received a letter (dated March 10, 2000) from Senator Frank H. Murkowski as Chairman of the Senate Committee on Energy and Natural Resources requesting an EIA Service Report with plausible scenarios for the Arctic National Wildlife Refuge (ANWR) supply development consistent with the most recent U.S. Geological Survey resource assessments. This service report is prepared in response to the request of Senator Murkowski. It focuses on the ANWR coastal plain, a region currently restricted from exploration and development, and updates EIA's 1987 ANWR assessment.

  4. Arctic house

    E-Print Network [OSTI]

    Turkel, Joel A. (Joel Abram), 1969-

    1999-01-01

    Currently available housing in the Arctic is limited to solutions that have been adapted from designs for less severe climates. This thesis has developed a new manner of residential construction designed specifically for ...

  5. Arctic Oil and Natural Gas Potential

    Reports and Publications (EIA)

    2009-01-01

    This paper examines the discovered and undiscovered Arctic oil and natural gas resource base with respect to their location and concentration. The paper also discusses the cost and impediments to developing Arctic oil and natural gas resources, including those issues associated with environmental habitats and political boundaries.

  6. Sandia Energy - Arctic Climate Measurements

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

    Arctic Climate Measurements Home Climate & Earth Systems Climate Measurement & Modeling Arctic Climate Measurements Arctic Climate Measurementscwdd2015-05-08T01:51:20+00:00 A...

  7. Arctic Energy Summit

    Broader source: Energy.gov [DOE]

    The 2015 Arctic Energy Summit is a multi-disciplinary event expected to draw several hundred industry officials, scientists, academics, policy makers, energy professionals, and community leaders together to collaborate and share leading approaches on Arctic energy issues.

  8. Review of technology for Arctic offshore oil and gas recovery. Appendices

    SciTech Connect (OSTI)

    Sackinger, W. M.

    1980-06-06

    This volume contains appendices of the following: US Geological Survey Arctic operating orders, 1979; Det Noske Vertas', rules for the design, construction and inspection of offshore technology, 1977; Alaska Oil and Gas Association, industry research projects, March 1980; Arctic Petroleum Operator's Association, industry research projects, January 1980; selected additional Arctic offshore bibliography on sea ice, icebreakers, Arctic seafloor conditions, ice-structures, frost heave and structure icing.

  9. Carbon dynamics in arctic vegetation 

    E-Print Network [OSTI]

    Street, Lorna Elizabeth

    2011-11-24

    Rapid climate change in Arctic regions is of concern due to important feedbacks between the Arctic land surface and the global climate system. A large amount of organic carbon (C) is currently stored in Arctic soils; if ...

  10. Arctic Climate Systems Analysis

    SciTech Connect (OSTI)

    Ivey, Mark D.; Robinson, David G.; Boslough, Mark B.; Backus, George A.; Peterson, Kara J.; van Bloemen Waanders, Bart G.; Swiler, Laura Painton; Desilets, Darin Maurice; Reinert, Rhonda Karen

    2015-03-01

    This study began with a challenge from program area managers at Sandia National Laboratories to technical staff in the energy, climate, and infrastructure security areas: apply a systems-level perspective to existing science and technology program areas in order to determine technology gaps, identify new technical capabilities at Sandia that could be applied to these areas, and identify opportunities for innovation. The Arctic was selected as one of these areas for systems level analyses, and this report documents the results. In this study, an emphasis was placed on the arctic atmosphere since Sandia has been active in atmospheric research in the Arctic since 1997. This study begins with a discussion of the challenges and benefits of analyzing the Arctic as a system. It goes on to discuss current and future needs of the defense, scientific, energy, and intelligence communities for more comprehensive data products related to the Arctic; assess the current state of atmospheric measurement resources available for the Arctic; and explain how the capabilities at Sandia National Laboratories can be used to address the identified technological, data, and modeling needs of the defense, scientific, energy, and intelligence communities for Arctic support.

  11. Arctic energy resources

    SciTech Connect (OSTI)

    Rey, L.

    1983-01-01

    The Arctic is a vulnerable region with immense resources. These range from the replenishable (tidal energy, hydroelectricity, wood, biomass, fish, game, and geothermal energy) to the non-replenishable (coal, minerals, natural gas, hydrocarbon deposits). But the problems of exploiting such resources without damaging the environment of the Arctic are formidable. In this book all aspects are considered: occurrence of energy resources; the technological and economic aspects of exploration and exploitation; the environmental and social impact of technological development.

  12. The Necklace around the Arctic Arctic indigenous peoples

    E-Print Network [OSTI]

    national choir). #12;The economies of the Arctic settlements invariably involve fish, oil or gas: natural and Wildlife Service ( http://arctic.fws.gov/ ), and other sources. #12;Faroe Islands (~Denmark) Shetland

  13. 6, 96559722, 2006 Arctic smoke

    E-Print Network [OSTI]

    Boyer, Edmond

    Discussions Arctic smoke ­ record high air pollution levels in the European Arctic due to agricultural fires into the European Arctic and caused the most severe air pollution episodes ever recorded there. This paper confirms that biomass burning (BB) was in-5 deed the source of the observed air pollution, studies the transport

  14. Statement from Secretary Bodman on the House Passage of the American...

    Energy Savers [EERE]

    "I applaud the House's passage of a bill that allows responsible, environmentally safe oil and natural gas drilling in the ANWR region of arctic Alaska. Had President Clinton...

  15. Arctic ice islands

    SciTech Connect (OSTI)

    Sackinger, W.M.; Jeffries, M.O.; Lu, M.C.; Li, F.C.

    1988-01-01

    The development of offshore oil and gas resources in the Arctic waters of Alaska requires offshore structures which successfully resist the lateral forces due to moving, drifting ice. Ice islands are floating, a tabular icebergs, up to 60 meters thick, of solid ice throughout their thickness. The ice islands are thus regarded as the strongest ice features in the Arctic; fixed offshore structures which can directly withstand the impact of ice islands are possible but in some locations may be so expensive as to make oilfield development uneconomic. The resolution of the ice island problem requires two research steps: (1) calculation of the probability of interaction between an ice island and an offshore structure in a given region; and (2) if the probability if sufficiently large, then the study of possible interactions between ice island and structure, to discover mitigative measures to deal with the moving ice island. The ice island research conducted during the 1983-1988 interval, which is summarized in this report, was concerned with the first step. Monte Carlo simulations of ice island generation and movement suggest that ice island lifetimes range from 0 to 70 years, and that 85% of the lifetimes are less then 35 years. The simulation shows a mean value of 18 ice islands present at any time in the Arctic Ocean, with a 90% probability of less than 30 ice islands. At this time, approximately 34 ice islands are known, from observations, to exist in the Arctic Ocean, not including the 10-meter thick class of ice islands. Return interval plots from the simulation show that coastal zones of the Beaufort and Chukchi Seas, already leased for oil development, have ice island recurrences of 10 to 100 years. This implies that the ice island hazard must be considered thoroughly, and appropriate safety measures adopted, when offshore oil production plans are formulated for the Alaskan Arctic offshore. 132 refs., 161 figs., 17 tabs.

  16. NGEE Arctic Data Catalog

    Office of Scientific and Technical Information (OSTI)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield MunicipalTechnical Report:Speeding accessby aLED Street LightingFromJune 2013TECNGEE Arctic - Data

  17. Preliminary Geospatial Analysis of Arctic Ocean Hydrocarbon Resources

    SciTech Connect (OSTI)

    Long, Philip E.; Wurstner, Signe K.; Sullivan, E. C.; Schaef, Herbert T.; Bradley, Donald J.

    2008-10-01

    Ice coverage of the Arctic Ocean is predicted to become thinner and to cover less area with time. The combination of more ice-free waters for exploration and navigation, along with increasing demand for hydrocarbons and improvements in technologies for the discovery and exploitation of new hydrocarbon resources have focused attention on the hydrocarbon potential of the Arctic Basin and its margins. The purpose of this document is to 1) summarize results of a review of published hydrocarbon resources in the Arctic, including both conventional oil and gas and methane hydrates and 2) develop a set of digital maps of the hydrocarbon potential of the Arctic Ocean. These maps can be combined with predictions of ice-free areas to enable estimates of the likely regions and sequence of hydrocarbon production development in the Arctic. In this report, conventional oil and gas resources are explicitly linked with potential gas hydrate resources. This has not been attempted previously and is particularly powerful as the likelihood of gas production from marine gas hydrates increases. Available or planned infrastructure, such as pipelines, combined with the geospatial distribution of hydrocarbons is a very strong determinant of the temporal-spatial development of Arctic hydrocarbon resources. Significant unknowns decrease the certainty of predictions for development of hydrocarbon resources. These include: 1) Areas in the Russian Arctic that are poorly mapped, 2) Disputed ownership: primarily the Lomonosov Ridge, 3) Lack of detailed information on gas hydrate distribution, and 4) Technical risk associated with the ability to extract methane gas from gas hydrates. Logistics may control areas of exploration more than hydrocarbon potential. Accessibility, established ownership, and leasing of exploration blocks may trump quality of source rock, reservoir, and size of target. With this in mind, the main areas that are likely to be explored first are the Bering Strait and Chukchi Sea, in spite of the fact that these areas do not have highest potential for future hydrocarbon reserves. Opportunities for improving the mapping and assessment of Arctic hydrocarbon resources include: 1) Refining hydrocarbon potential on a basin-by-basin basis, 2) Developing more realistic and detailed distribution of gas hydrate, and 3) Assessing the likely future scenarios for development of infrastructure and their interaction with hydrocarbon potential. It would also be useful to develop a more sophisticated approach to merging conventional and gas hydrate resource potential that considers the technical uncertainty associated with exploitation of gas hydrate resources. Taken together, additional work in these areas could significantly improve our understanding of the exploitation of Arctic hydrocarbons as ice-free areas increase in the future.

  18. Arctic Sea ice model sensitivities.

    SciTech Connect (OSTI)

    Peterson, Kara J.; Bochev, Pavel Blagoveston; Paskaleva, Biliana Stefanova

    2010-12-01

    Arctic sea ice is an important component of the global climate system and, due to feedback effects, the Arctic ice cover is changing rapidly. Predictive mathematical models are of paramount importance for accurate estimates of the future ice trajectory. However, the sea ice components of Global Climate Models (GCMs) vary significantly in their prediction of the future state of Arctic sea ice and have generally underestimated the rate of decline in minimum sea ice extent seen over the past thirty years. One of the contributing factors to this variability is the sensitivity of the sea ice state to internal model parameters. A new sea ice model that holds some promise for improving sea ice predictions incorporates an anisotropic elastic-decohesive rheology and dynamics solved using the material-point method (MPM), which combines Lagrangian particles for advection with a background grid for gradient computations. We evaluate the variability of this MPM sea ice code and compare it with the Los Alamos National Laboratory CICE code for a single year simulation of the Arctic basin using consistent ocean and atmospheric forcing. Sensitivities of ice volume, ice area, ice extent, root mean square (RMS) ice speed, central Arctic ice thickness,and central Arctic ice speed with respect to ten different dynamic and thermodynamic parameters are evaluated both individually and in combination using the Design Analysis Kit for Optimization and Terascale Applications (DAKOTA). We find similar responses for the two codes and some interesting seasonal variability in the strength of the parameters on the solution.

  19. Warming of the arctic ice-ocean system is faster than the global average since the 1960s

    E-Print Network [OSTI]

    Zhang, Jinlun

    Warming of the arctic ice-ocean system is faster than the global average since the 1960s Jinlun.203°C. The warming of the world ocean is associated with an increase in global surface air temperature heat flux. Citation: Zhang, J. (2005), Warming of the arctic ice-ocean system is faster than the global

  20. Evaluation of Arctic sea ice thickness simulated by Arctic Ocean Model Intercomparison Project models

    E-Print Network [OSTI]

    Zhang, Jinlun

    Evaluation of Arctic sea ice thickness simulated by Arctic Ocean Model Intercomparison Project March 2012. [1] Six Arctic Ocean Model Intercomparison Project model simulations are compared and Assimilation System models. Citation: Johnson, M., et al. (2012), Evaluation of Arctic sea ice thickness

  1. Time varying arctic climate change amplification

    SciTech Connect (OSTI)

    Chylek, Petr [Los Alamos National Laboratory; Dubey, Manvendra K [Los Alamos National Laboratory; Lesins, Glen [DALLHOUSIE U; Wang, Muyin [NOAA/JISAO

    2009-01-01

    During the past 130 years the global mean surface air temperature has risen by about 0.75 K. Due to feedbacks -- including the snow/ice albedo feedback -- the warming in the Arctic is expected to proceed at a faster rate than the global average. Climate model simulations suggest that this Arctic amplification produces warming that is two to three times larger than the global mean. Understanding the Arctic amplification is essential for projections of future Arctic climate including sea ice extent and melting of the Greenland ice sheet. We use the temperature records from the Arctic stations to show that (a) the Arctic amplification is larger at latitudes above 700 N compared to those within 64-70oN belt, and that, surprisingly; (b) the ratio of the Arctic to global rate of temperature change is not constant but varies on the decadal timescale. This time dependence will affect future projections of climate changes in the Arctic.

  2. Arctic Energy Technology Development Laboratory

    SciTech Connect (OSTI)

    Sukumar Bandopadhyay; Charles Chamberlin; Robert Chaney; Gang Chen; Godwin Chukwu; James Clough; Steve Colt; Anthony Covescek; Robert Crosby; Abhijit Dandekar; Paul Decker; Brandon Galloway; Rajive Ganguli; Catherine Hanks; Rich Haut; Kristie Hilton; Larry Hinzman; Gwen Holdman; Kristie Holland; Robert Hunter; Ron Johnson; Thomas Johnson; Doug Kame; Mikhail Kaneveskly; Tristan Kenny; Santanu Khataniar; Abhijeet Kulkami; Peter Lehman; Mary Beth Leigh; Jenn-Tai Liang; Michael Lilly; Chuen-Sen Lin; Paul Martin; Pete McGrail; Dan Miller; Debasmita Misra; Nagendra Nagabhushana; David Ogbe; Amanda Osborne; Antoinette Owen; Sharish Patil; Rocky Reifenstuhl; Doug Reynolds; Eric Robertson; Todd Schaef; Jack Schmid; Yuri Shur; Arion Tussing; Jack Walker; Katey Walter; Shannon Watson; Daniel White; Gregory White; Mark White; Richard Wies; Tom Williams; Dennis Witmer; Craig Wollard; Tao Zhu

    2008-12-31

    The Arctic Energy Technology Development Laboratory was created by the University of Alaska Fairbanks in response to a congressionally mandated funding opportunity through the U.S. Department of Energy (DOE), specifically to encourage research partnerships between the university, the Alaskan energy industry, and the DOE. The enabling legislation permitted research in a broad variety of topics particularly of interest to Alaska, including providing more efficient and economical electrical power generation in rural villages, as well as research in coal, oil, and gas. The contract was managed as a cooperative research agreement, with active project monitoring and management from the DOE. In the eight years of this partnership, approximately 30 projects were funded and completed. These projects, which were selected using an industry panel of Alaskan energy industry engineers and managers, cover a wide range of topics, such as diesel engine efficiency, fuel cells, coal combustion, methane gas hydrates, heavy oil recovery, and water issues associated with ice road construction in the oil fields of the North Slope. Each project was managed as a separate DOE contract, and the final technical report for each completed project is included with this final report. The intent of this process was to address the energy research needs of Alaska and to develop research capability at the university. As such, the intent from the beginning of this process was to encourage development of partnerships and skills that would permit a transition to direct competitive funding opportunities managed from funding sources. This project has succeeded at both the individual project level and at the institutional development level, as many of the researchers at the university are currently submitting proposals to funding agencies, with some success.

  3. Latitudinal distribution of the recent Arctic warming

    SciTech Connect (OSTI)

    Chylek, Petr; Lesins, Glen K; Wang, Muyin

    2010-12-08

    Increasing Arctic temperature, disappearance of Arctic sea ice, melting of the Greenland ice sheet, sea level rise, increasing strength of Atlantic hurricanes are these impending climate catastrophes supported by observations? Are the recent data really unprecedented during the observational records? Our analysis of Arctic temperature records shows that the Arctic and temperatures in the 1930s and 1940s were almost as high as they are today. We argue that the current warming of the Arctic region is affected more by the multi-decadal climate variability than by an increasing concentration of carbon dioxide. Unfortunately, none of the existing coupled Atmosphere-Ocean General Circulation Models used in the IPCC 2007 cIimate change assessment is able to reproduce neither the observed 20th century Arctic cIimate variability nor the latitudinal distribution of the warming.

  4. Next-Generation Ecosystem Experiments NGEE Arctic Quarterly Report

    E-Print Network [OSTI]

    to improve representation of the Arctic in Earth System Models Topography influences snow cover, thermal

  5. NOAA's Role in the Arctic Presentation by Kathleen Crane

    E-Print Network [OSTI]

    interact with the rest of the Arctic (marine, ice and terrestrial) system? · Which recent changes Fresh water In the Arctic Ocean The sources and pathways of fresh water into and out of the Arctic Ocean shape of the Beaufort Gyre, Surface Transport Pathways in Response to the Arctic Oscillation. #12

  6. Structural monitoring helps assess deformations in Arctic pipelines

    SciTech Connect (OSTI)

    Nyman, K.J.; Lara, P.F.

    1986-11-10

    Advanced structural monitoring systems can play an important role in the evaluation of arctic pipeline distortions along the alignment. These systems can influence pipeline design requirements, reduce capital costs, and improve operating reliability. Differential soil movements resulting from terrain instabilities are the main features which threaten a pipeline's structural integrity and affect the design of buried pipeline systems in the Arctic. Economic, aesthetic, and safety concerns make conventional buried construction an optimum design choice for an arctic crude-oil or gas-pipeline transportation system. However, variable frozen and thawed soil conditions underlying the pipeline along a discontinuous permafrost corridor pose a challenge to the design and operation of such systems. Crude-oil pipelines which must operate at elevated temperatures can be installed in unfrozen soils or in permafrost soils where initially frozen segments will exhibit limited settlement under the thawed conditions imposed by pipeline construction and operation. Ice-rich portions of the frozen alignment may have an unacceptable settlement potential for a warm buried pipeline. In contrast, natural-gas pipelines can be operated cold to increase throughput capability and to prevent the problems associated with thawing permafrost.

  7. Seasonal dynamics of bacterial biomass and production in a coastal arctic ecosystem: Franklin Bay, western Canadian Arctic

    E-Print Network [OSTI]

    Vincent, Warwick F.

    Seasonal dynamics of bacterial biomass and production in a coastal arctic ecosystem: Franklin Bay 2008. [1] The Canadian Arctic Shelf Exchange Study (CASES) included the overwintering deployment biomass and production in a coastal arctic ecosystem: Franklin Bay, western Canadian Arctic, J. Geophys

  8. Springtime Arctic haze contributions of submicron organic particles from European and Asian combustion sources

    E-Print Network [OSTI]

    Kroll, Jesse

    The composition of Arctic aerosol, especially during the springtime Arctic haze, may play an important role in the radiative balance of the Arctic. The contribution of organic components to Arctic haze has only recently ...

  9. igure 1. Map of N. Alaska and NW Canada Showing the Locations...

    Gasoline and Diesel Fuel Update (EIA)

    1. Map of Northern Alaska and Northwestern Canada Showing the Locations of the National Petroleum Reserve-Alaska (NPR-A), Arctic National Wildlife Refuge (ANWR), 1002 Area, Current...

  10. Economic feasibility of shipping containers through the Arctic

    E-Print Network [OSTI]

    Pollock, Russell (Russell Clayton)

    2009-01-01

    As the Arctic ice cover continues to retreat, the possibility of regular transit through the Arctic becomes an increasing reality. Liner companies could take advantage of distance savings (up to 4000 nautical miles less ...

  11. Tuktoyaktuk : responsive strategies for a new Arctic urbanism

    E-Print Network [OSTI]

    Ritchot, Pamela (Pamela Rae)

    2011-01-01

    The Canadian Arctic is facing a set of compounding crises that will drastically impact the future of its coastal frontier. At a time when climate change is having a detrimental impact on the Arctic landscape, Northern ...

  12. The seasonal dynamics of Arctic surface hydrology in permafrost environments

    E-Print Network [OSTI]

    Trofaier, Anna Maria

    2014-11-11

    Climate-induced landscape evolution is resulting in changes to biogeochemical and hydrologi- cal cycling. In the Arctic and sub-Arctic permafrost zones, rising air temperatures are warming, and in some regions even thawing, the frozen ground...

  13. Clonal Diversity in an Expanding Community of Arctic Salix spp. and a Model for Recruitment Modes of Arctic Plants

    E-Print Network [OSTI]

    Goldsmith, Greg

    Clonal Diversity in an Expanding Community of Arctic Salix spp. and a Model for Recruitment Modes identity in a population of Salix spp. shrubs at an arctic site with a known history of woody shrub

  14. NGEE Arctic Webcam Photographs, Barrow Environmental Observatory, Barrow, Alaska

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

    Bob Busey; Larry Hinzman

    The NGEE Arctic Webcam (PTZ Camera) captures two views of seasonal transitions from its generally south-facing position on a tower located at the Barrow Environmental Observatory near Barrow, Alaska. Images are captured every 30 minutes. Historical images are available for download. The camera is operated by the U.S. DOE sponsored Next Generation Ecosystem Experiments - Arctic (NGEE Arctic) project.

  15. NGEE Arctic Webcam Photographs, Barrow Environmental Observatory, Barrow, Alaska

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

    Bob Busey; Larry Hinzman

    2012-04-01

    The NGEE Arctic Webcam (PTZ Camera) captures two views of seasonal transitions from its generally south-facing position on a tower located at the Barrow Environmental Observatory near Barrow, Alaska. Images are captured every 30 minutes. Historical images are available for download. The camera is operated by the U.S. DOE sponsored Next Generation Ecosystem Experiments - Arctic (NGEE Arctic) project.

  16. A Sensitivity Study on Modeling Black Carbon in Snow and its Radiative Forcing over the Arctic and Northern China

    SciTech Connect (OSTI)

    Qian, Yun; Wang, Hailong; Zhang, Rudong; Flanner, M. G.; Rasch, Philip J.

    2014-06-02

    Black carbon in snow (BCS) simulated in the Community Atmosphere Model (CAM5) is evaluated against measurements over Northern China and the Arctic, and its sensitivity to atmospheric deposition and two parameters that affect post-depositional enrichment is explored. The BCS concentration is overestimated (underestimated) by a factor of two in Northern China (Arctic) in the default model, but agreement with observations is good over both regions in the simulation with improvements in BC transport and deposition. Sensitivity studies indicate that uncertainty in the melt-water scavenging efficiency (MSE) parameter substantially affects BCS and its radiative forcing (by a factor of 2-7) in the Arctic through post-depositional enrichment. The MSE parameter has a relatively small effect on the magnitude of BCS seasonal cycle but can alter its phase in Northern China. The impact of the snow aging scaling factor (SAF) on BCS, partly through the post-depositional enrichment effect, shows more complex latitudinal and seasonal dependence. Similar to MSE, SAF affects more significantly the magnitude (phase) of BCS season cycle over the Arctic (Northern China). While uncertainty associated with the representation of BC transport and deposition processes in CAM5 is more important than that associated with the two snow model parameters in Northern China, the two uncertainties have comparable effect in the Arctic.

  17. 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.

  18. The Arctic as a test case for an assessment of climate impacts on national security.

    SciTech Connect (OSTI)

    Taylor, Mark A.; Zak, Bernard Daniel; Backus, George A.; Ivey, Mark D.; Boslough, Mark Bruce Elrick

    2008-11-01

    The Arctic region is rapidly changing in a way that will affect the rest of the world. Parts of Alaska, western Canada, and Siberia are currently warming at twice the global rate. This warming trend is accelerating permafrost deterioration, coastal erosion, snow and ice loss, and other changes that are a direct consequence of climate change. Climatologists have long understood that changes in the Arctic would be faster and more intense than elsewhere on the planet, but the degree and speed of the changes were underestimated compared to recent observations. Policy makers have not yet had time to examine the latest evidence or appreciate the nature of the consequences. Thus, the abruptness and severity of an unfolding Arctic climate crisis has not been incorporated into long-range planning. The purpose of this report is to briefly review the physical basis for global climate change and Arctic amplification, summarize the ongoing observations, discuss the potential consequences, explain the need for an objective risk assessment, develop scenarios for future change, review existing modeling capabilities and the need for better regional models, and finally to make recommendations for Sandia's future role in preparing our leaders to deal with impacts of Arctic climate change on national security. Accurate and credible regional-scale climate models are still several years in the future, and those models are essential for estimating climate impacts around the globe. This study demonstrates how a scenario-based method may be used to give insights into climate impacts on a regional scale and possible mitigation. Because of our experience in the Arctic and widespread recognition of the Arctic's importance in the Earth climate system we chose the Arctic as a test case for an assessment of climate impacts on national security. Sandia can make a swift and significant contribution by applying modeling and simulation tools with internal collaborations as well as with outside organizations. Because changes in the Arctic environment are happening so rapidly, a successful program will be one that can adapt very quickly to new information as it becomes available, and can provide decision makers with projections on the 1-5 year time scale over which the most disruptive, high-consequence changes are likely to occur. The greatest short-term impact would be to initiate exploratory simulations to discover new emergent and robust phenomena associated with one or more of the following changing systems: Arctic hydrological cycle, sea ice extent, ocean and atmospheric circulation, permafrost deterioration, carbon mobilization, Greenland ice sheet stability, and coastal erosion. Sandia can also contribute to new technology solutions for improved observations in the Arctic, which is currently a data-sparse region. Sensitivity analyses have the potential to identify thresholds which would enable the collaborative development of 'early warning' sensor systems to seek predicted phenomena that might be precursory to major, high-consequence changes. Much of this work will require improved regional climate models and advanced computing capabilities. Socio-economic modeling tools can help define human and national security consequences. Formal uncertainty quantification must be an integral part of any results that emerge from this work.

  19. Computational Arctic Research at ARSC/UAF

    E-Print Network [OSTI]

    Newby, Gregory B.

    Supercomputing Center ­ Ph.D. Syracuse 1993, "Information Transfer" ­ Research interests in data Climate Change Impacts on Water Resources across Alaska and the Hawaiian Islands" · PI: Buck Sharpton Supercomputing Center University of Alaska Fairbanks U.S. Arctic Research Commission Meeting October 7, 2010 #12

  20. Underwater robotic work systems for Russian arctic offshore oil/gas industry: Final report. Export trade information

    SciTech Connect (OSTI)

    1997-12-15

    The study was performed in association with Rosshelf, a shelf developing company located in Moscow. This volume involves developing an underwater robotic work system for oil exploration in Russia`s Arctic waters, Sea of Okhotsk and the Caspian Sea. The contents include: (1) Executive Summary; (2) Study Background; (3) Study Outline and Results; (4) Conclusions; (5) Separately Published Elements; (6) List of Subcontractors.

  1. Water balance of the Arctic drainage system using GRACE gravimetry products

    E-Print Network [OSTI]

    Frappart, F; Ramillien, G; Famiglietti, JS

    2011-01-01

    of the Arctic Ocean freshwater balance and their interannualInteractions, 2, pp. 1–37. Water balance of the Arctic usingEWG climatology. Water balance of the Arctic using GRACE

  2. Potential Oil Production from the Coastal Plain of the Arctic...

    Annual Energy Outlook [U.S. Energy Information Administration (EIA)]

    Potential Oil Production from the Coastal Plain of the Arctic National Wildlife Refuge: Updated Assessment Glossary ANILCA: Alaska National Interest Lands Conservation Act ANS:...

  3. Potential Oil Production from the Coastal Plain of the Arctic...

    U.S. Energy Information Administration (EIA) Indexed Site

    Potential Oil Production from the Coastal Plain of the Arctic National Wildlife Refuge: Updated Assessment Executive Summary This Service Report, Potential Oil Production from the...

  4. Potential Oil Production from the Coastal Plain of the Arctic...

    U.S. Energy Information Administration (EIA) Indexed Site

    Potential Oil Production from the Coastal Plain of the Arctic National Wildlife Refuge: Updated Assessment 2. Analysis Discussion Resource Assessment The USGS most recent...

  5. Plant Root Characteristics and Dynamics in Arctic Tundra Ecosystems...

    Office of Scientific and Technical Information (OSTI)

    Language: English Subject: 54 Environmental Sciences arctic; tundra; fine roots; root biomass; root production; root turnover; plant-soil, model Word Cloud More Like This Dataset...

  6. Climate-derived tensions in Arctic security.

    SciTech Connect (OSTI)

    Backus, George A.; Strickland, James Hassler

    2008-09-01

    Globally, there is no lack of security threats. Many of them demand priority engagement and there can never be adequate resources to address all threats. In this context, climate is just another aspect of global security and the Arctic just another region. In light of physical and budgetary constraints, new security needs must be integrated and prioritized with existing ones. This discussion approaches the security impacts of climate from that perspective, starting with the broad security picture and establishing how climate may affect it. This method provides a different view from one that starts with climate and projects it, in isolation, as the source of a hypothetical security burden. That said, the Arctic does appear to present high-priority security challenges. Uncertainty in the timing of an ice-free Arctic affects how quickly it will become a security priority. Uncertainty in the emergent extreme and variable weather conditions will determine the difficulty (cost) of maintaining adequate security (order) in the area. The resolution of sovereignty boundaries affects the ability to enforce security measures, and the U.S. will most probably need a military presence to back-up negotiated sovereignty agreements. Without additional global warming, technology already allows the Arctic to become a strategic link in the global supply chain, possibly with northern Russia as its main hub. Additionally, the multinational corporations reaping the economic bounty may affect security tensions more than nation-states themselves. Countries will depend ever more heavily on the global supply chains. China has particular needs to protect its trade flows. In matters of security, nation-state and multinational-corporate interests will become heavily intertwined.

  7. New Trans-Arctic shipping routes navigable by midcentury

    E-Print Network [OSTI]

    of additional ice reductions in the future, have fueled speculations of potential new trans-Arctic shippingNew Trans-Arctic shipping routes navigable by midcentury Laurence C. Smith1 and Scott R. Stephenson changes in sea ice will realistically impact ship navigation are lacking. To address this deficiency, we

  8. An Arctic Terrestrial Food-Chain Bioaccumulation Model for

    E-Print Network [OSTI]

    Gobas, Frank

    An Arctic Terrestrial Food-Chain Bioaccumulation Model for Persistent Organic Pollutants B A R R Y tarandus), and wolf (Canis lupus) food-chains of Canada's central and western arctic region from measured concentrations of 25 organic chemicals forecasted for caribou and wolves from Cambridge Bay (69°07 N 105°03 W

  9. National Strategy for the Arctic Region Stakeholder Outreach Meeting: Nome

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy (DOE) is announcing the second round of tribal consultations and stakeholder outreach meetings on the National Strategy for the Arctic Region (NSAR), 10-Year Plan to accelerate renewable energy deployment in the Arctic Region.

  10. National Strategy for the Arctic Region Tribal Consultation Session: Barrow

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy (DOE) is announcing the second round of tribal consultations and stakeholder outreach meetings on the National Strategy for the Arctic Region (NSAR), 10-Year Plan to accelerate renewable energy deployment in the Arctic Region.

  11. National Strategy for the Arctic Region Stakeholder Outreach Meeting: Barrow

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy (DOE) is announcing the second round of tribal consultations and stakeholder outreach meetings on the National Strategy for the Arctic Region (NSAR), 10-Year Plan to accelerate renewable energy deployment in the Arctic Region.

  12. National Strategy for the Arctic Region Tribal Consultation Session: Nome

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy (DOE) is announcing the second round of tribal consultations and stakeholder outreach meetings on the National Strategy for the Arctic Region (NSAR), 10-Year Plan to accelerate renewable energy deployment in the Arctic Region.

  13. National Strategy for the Arctic Region Stakeholder Outreach Meeting: Bethel

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy (DOE) is announcing the second round of tribal consultations and stakeholder outreach meetings on the National Strategy for the Arctic Region (NSAR), 10-Year Plan to accelerate renewable energy deployment in the Arctic Region.

  14. National Strategy for the Arctic Region Tribal Consultation Session: Bethel

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy (DOE) is announcing the second round of tribal consultations and stakeholder outreach meetings on the National Strategy for the Arctic Region (NSAR), 10-Year Plan to accelerate renewable energy deployment in the Arctic Region.

  15. National Strategy for the Arctic Tribal Consultation Session: Fairbanks

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy (DOE) is announcing the second round of tribal consultations and stakeholder outreach meetings on the National Strategy for the Arctic Region (NSAR), 10-Year Plan to accelerate renewable energy deployment in the Arctic Region.

  16. National Strategy for the Arctic Region Stakeholder Outreach Meeting: Fairbanks

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy (DOE) is announcing the second round of tribal consultations and stakeholder outreach meetings on the National Strategy for the Arctic Region (NSAR), 10-Year Plan to accelerate renewable energy deployment in the Arctic Region.

  17. National Strategy for the Arctic Region Stakeholder Outreach Meeting: Anchorage

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy (DOE) is announcing the second round of tribal consultations and stakeholder outreach meetings on the National Strategy for the Arctic Region (NSAR), 10-Year Plan to accelerate renewable energy deployment in the Arctic Region. The purpose of this round is to give feedback on the elements of the draft plan.

  18. December 2013 www.arctic.noaa.gov/reportcard

    E-Print Network [OSTI]

    of Oslo, Department of Geosciences, 0316 Oslo, Norway Y. Cao, Ocean University of China, Qingdao, China J Centre in Svalbard, UNIS, Norway Institute of Geography and Geology, University of Copenhagen, Denmark J.S. Christiansen, Department of Arctic and Marine Biology, UiT The Arctic University of Norway, Tromsø, Norway B

  19. Bodman Statement On Senate Approval of ANWR Provisions | Department of

    Broader source: Energy.gov (indexed) [DOE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann JacksonDepartment|Marketing, LLC |Energy AdvisorEnergySeptemberof EnergyAdams

  20. Characterizing Arctic Mixed-phase Cloud Structure

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 OutreachProductswsicloudwsiclouddenDVA N C E D BGene Network ShapingDate:Characterization ofArctic Mixed-phase

  1. BLM Arctic Field Office | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop IncIowaWisconsin: EnergyYork Jump|LineMaine:Ayuda:NavegacionBARC09-167Arctic Field

  2. Concept Study: Exploration and Production in Environmentally Sensitive Arctic Areas

    SciTech Connect (OSTI)

    Shirish Patil; Rich Haut; Tom Williams; Yuri Shur; Mikhail Kanevskiy; Cathy Hanks; Michael Lilly

    2008-12-31

    The Alaska North Slope offers one of the best prospects for increasing U.S. domestic oil and gas production. However, this region faces some of the greatest environmental and logistical challenges to oil and gas production in the world. A number of studies have shown that weather patterns in this region are warming, and the number of days the tundra surface is adequately frozen for tundra travel each year has declined. Operators are not allowed to explore in undeveloped areas until the tundra is sufficiently frozen and adequate snow cover is present. Spring breakup then forces rapid evacuation of the area prior to snowmelt. Using the best available methods, exploration in remote arctic areas can take up to three years to identify a commercial discovery, and then years to build the infrastructure to develop and produce. This makes new exploration costly. It also increases the costs of maintaining field infrastructure, pipeline inspections, and environmental restoration efforts. New technologies are needed, or oil and gas resources may never be developed outside limited exploration stepouts from existing infrastructure. Industry has identified certain low-impact technologies suitable for operations, and has made improvements to reduce the footprint and impact on the environment. Additional improvements are needed for exploration and economic field development and end-of-field restoration. One operator-Anadarko Petroleum Corporation-built a prototype platform for drilling wells in the Arctic that is elevated, modular, and mobile. The system was tested while drilling one of the first hydrate exploration wells in Alaska during 2003-2004. This technology was identified as a potentially enabling technology by the ongoing Joint Industry Program (JIP) Environmentally Friendly Drilling (EFD) program. The EFD is headed by Texas A&M University and the Houston Advanced Research Center (HARC), and is co-funded by the National Energy Technology Laboratory (NETL). The EFD participants believe that the platform concept could have far-reaching applications in the Arctic as a drilling and production platform, as originally intended, and as a possible staging area. The overall objective of this project was to document various potential applications, locations, and conceptual designs for the inland platform serving oil and gas operations on the Alaska North Slope. The University of Alaska Fairbanks assisted the HARC/TerraPlatforms team with the characterization of potential resource areas, geotechnical conditions associated with continuous permafrost terrain, and the potential end-user evaluation process. The team discussed the various potential applications with industry, governmental agencies, and environmental organizations. The benefits and concerns associated with industry's use of the technology were identified. In this discussion process, meetings were held with five operating companies (22 people), including asset team leaders, drilling managers, HSE managers, and production and completion managers. Three other operating companies and two service companies were contacted by phone to discuss the project. A questionnaire was distributed and responses were provided, which will be included in the report. Meetings were also held with State of Alaska Department of Natural Resources officials and U.S. Bureau of Land Management regulators. The companies met with included ConcoPhillips, Chevron, Pioneer Natural Resources, Fairweather E&P, BP America, and the Alaska Oil and Gas Association.

  3. Potential Oil Production from the Coastal Plain of the Arctic...

    U.S. Energy Information Administration (EIA) Indexed Site

    Potential Oil Production from the Coastal Plain of the Arctic National Wildlife Refuge: Updated Assessment 3. Summary The 1.5 million-acre coastal plain of the 19 million-acre...

  4. National Strategy for the Arctic Tribal Consultation Session...

    Energy Savers [EERE]

    Tribal Consultation Session: Fairbanks National Strategy for the Arctic Tribal Consultation Session: Fairbanks February 19, 2015 9:30AM to 10:30AM AKST Fairbanks, Alaska BLM...

  5. National Strategy for the Arctic Region Tribal Consultation Session...

    Energy Savers [EERE]

    Arctic Region Tribal Consultation Session: Dutch HarborUnalaska February 27, 2015 10:00AM to 12:00PM EST Unalaska, Alaska Unalaska Public Library 64 Eleanor Dr. Unalaska, AK 99685...

  6. National Strategy for the Arctic Region Stakeholder Outreach...

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

    Arctic Region Stakeholder Outreach Meeting: Dutch HarborUnalaska February 27, 2015 1:30PM to 3:30PM EST Unalaska, Alaska Unalaska Public Library 64 Eleanor Dr. Unalaska, AK 99685...

  7. National Strategy for the Arctic Region Tribal Consultation and...

    Office of Environmental Management (EM)

    Consultation and Stakeholder Outreach Session: Kotzebue February 23, 2015 10:00AM to 12:00PM AKST Kotzebue, Alaska Northwest Arctic Heritage Center 171 3rd Ave. Kotzebue, AK 9975...

  8. National Strategy for the Arctic Region Stakeholder Outreach...

    Office of Environmental Management (EM)

    for the Arctic Region Stakeholder Outreach Meeting: Bethel February 25, 2015 1:30PM to 3:30PM AKST Bethel, Alaska AVCP Regional Housing Authority 411 Ptarmigan St. Bethel, AK 99559...

  9. An analysis of the carbon balance of the Arctic Basin from 1997 to 2006

    E-Print Network [OSTI]

    McGuire, A. D.

    This study used several model-based tools to analyse the dynamics of the Arctic Basin between 1997 and 2006 as a linked system of land-ocean-atmosphere C exchange. The analysis estimates that terrestrial areas of the Arctic ...

  10. Distribution and drivers of ectomycorrhizal fungal communities across the North American Arctic

    E-Print Network [OSTI]

    Taylor, Lee

    of the North American Arctic. We collected roots from two principal arctic ectomycorrhizal host plants, Salix, and Pyronemataceae. Both host plants showed similar species richness, with 176 OTUs on Salix arctica and 154 OTUs

  11. A Climatology of the Arctic on Mid-Tropospheric Temperature Regulation 

    E-Print Network [OSTI]

    Anthony, Jeremy Patrick

    2014-06-24

    The Arctic is a unique and complex environment. Many factors play a role in determining the long-term climate of the Arctic, including mesoscale weather systems and many complex ice-albedo feedback mechanisms. Previous studies determined using real...

  12. Energy Design Guidelines for High Performance Schools: Arctic and Subarctic Climates

    SciTech Connect (OSTI)

    2004-11-01

    Energy Design Guidelines for High Performance Schools book detailing DOE's EnergySmart Schools Program for Arctic Climates.

  13. The impact of Arctic warming on the midlatitude jet-stream: Can it?

    E-Print Network [OSTI]

    Barnes, Elizabeth A.

    Opinion The impact of Arctic warming on the midlatitude jet-stream: Can it? Has it? Will it. An open question, however, is whether these Arctic changes have an effect on the jet-stream and thereby inquiries around three distinct questions: Can Arctic warming influence the midlatitude jet-stream? Has

  14. Impact of sudden Arctic sea-ice loss on stratospheric polar ozone recovery

    E-Print Network [OSTI]

    Wirosoetisno, Djoko

    Impact of sudden Arctic sea-ice loss on stratospheric polar ozone recovery Article Published.G. and Ravishankara, A.R. (2009) Impact of sudden Arctic sea-ice loss on stratospheric polar ozone recovery's research outputs online #12;Impact of sudden Arctic sea-ice loss on stratospheric polar ozone recovery J. F

  15. Observational determination of albedo decrease caused by vanishing Arctic sea ice

    E-Print Network [OSTI]

    Eisenman, Ian

    ) The decline of Arctic sea ice has been documented in over 30 y of satellite passive microwave observations- ments along with satellite microwave sea ice data to document the Arctic-wide decrease in planetary to an additional 6.4 ± 0.9 W/m2 of solar energy input into the Arctic Ocean region since 1979. Averaged over

  16. 2012 Changing Arctic Ocean 506E/497E -Lecture 7 -Woodgate Schematic Surface and Atlantic Circulation

    E-Print Network [OSTI]

    Washington at Seattle, University of

    LHW ­ Lower Halocline Water AW ­ Atlantic Water DW ­ Deep Water WESTERN ARCTIC (PACIFIC) HALOCLINE Halocline Water LHW ­ Lower Halocline Water AW ­ Atlantic Water DW ­ Deep Water European Speak: e.g. Manley Circulation Jones, 2001 Typical Arctic profiles Bottom Water "the rest" Western Arctic warmer ATLANTIC WATER T

  17. Evaluation of Arctic Broadband Surface Radiation Measurements

    SciTech Connect (OSTI)

    Matsui, N.; Long, Charles N.; Augustine, J. A.; Halliwell, D.; Uttal, Taneil; Longenecker, D.; Niebergale, J.; Wendell, J.; Albee, R.

    2012-02-24

    The Arctic is a challenging environment for making in-situ radiation measurements. A standard suite of radiation sensors is typically designed to measure the total, direct and diffuse components of incoming and outgoing broadband shortwave (SW) and broadband thermal infrared, or longwave (LW) radiation. Enhancements can include various sensors for measuring irradiance in various narrower bandwidths. Many solar radiation/thermal infrared flux sensors utilize protective glass domes and some are mounted on complex mechanical platforms (solar trackers) that rotate sensors and shading devices that track the sun. High quality measurements require striking a balance between locating sensors in a pristine undisturbed location free of artificial blockage (such as buildings and towers) and providing accessibility to allow operators to clean and maintain the instruments. Three significant sources of erroneous data include solar tracker malfunctions, rime/frost/snow deposition on the instruments and operational problems due to limited operator access in extreme weather conditions. In this study, a comparison is made between the global and component sum (direct [vertical component] + diffuse) shortwave measurements. The difference between these two quantities (that theoretically should be zero) is used to illustrate the magnitude and seasonality of radiation flux measurement problems. The problem of rime/frost/snow deposition is investigated in more detail for one case study utilizing both shortwave and longwave measurements. Solutions to these operational problems are proposed that utilize measurement redundancy, more sophisticated heating and ventilation strategies and a more systematic program of operational support and subsequent data quality protocols.

  18. An active atmospheric methane sink in high Arctic mineral cryosols

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

    Lau, Maggie C.Y.; Stackhouse, B.; Layton, Alice C.; Chauhan, Archana; Vishnivetskaya, T. A.; Chourey, Karuna; Mykytczuk, N. C.S.; Bennett, Phil C.; Lamarche-Gagnon, G.; Burton, N.; et al

    2015-04-14

    The transition of Arctic carbon-rich cryosols into methane (CH?)-emitting wetlands due to global warming is a rising concern. However, the spatially predominant mineral cryosols and their CH? emission potential are poorly understood. Fluxes measured in situ and estimated under laboratory conditions coupled with -omics analysis indicate (1) mineral cryosols in the Canadian high Arctic contain atmospheric CH?-oxidizing bacteria; (2) the atmospheric CH? uptake flux increases with ground temperature; and, as a result, (3) the atmospheric CH? sink strength will increase by a factor of 5-30 as the Arctic warms by 5-15 °C over a century. We demonstrated that acidic mineralmore »cryosols have previously unrecognized potential of negative CH? feedback.« less

  19. The Arctic Lower Troposphere Observed Structure (ALTOS) Campaign

    SciTech Connect (OSTI)

    Verlinde, J

    2010-10-18

    The ALTOS campaign focuses on operating a tethered observing system for routine in situ sampling of low-level (< 2 km) Arctic clouds. It has been a long-term hope to fly tethered systems at Barrow, Alaska, but it is clear that the Federal Aviation Administration (FAA) will not permit in-cloud tether systems at Barrow, even if unmanned aerial vehicle (UAV) operations are allowed in the future. We have provided the scientific rationale for long-term, routine in situ measurements of cloud and aerosol properties in the Arctic. The existing restricted air space at Oliktok offers an opportunity to do so.

  20. Sampling Strategy for Enumerating the Western Arctic Population

    E-Print Network [OSTI]

    of the bowhead whale and discusses methods 20· 40· 80· N 60· 70· 30· 120· NORTH AMERICA ARCTIC OCEAN 150· W which scientific means of assessing the number of whales which can be safely removed from the bowhead stock stress relating to ac- tivities of offshore oil development, subsistence harvest, or natural fluctua

  1. A new way to study the changing Arctic ecosystem

    ScienceCinema (OSTI)

    Hubbard, Susan

    2013-05-29

    Berkeley Lab scientists Susan Hubbard and Margaret Torn discuss the proposed Next Generation Ecosystem Experiment, which is designed to answer one of the most urgent questions facing researchers today: How will a changing climate impact the Arctic, and how will this in turn impact the planet's climate? More info: http://newscenter.lbl.gov/feature-stories/2011/09/14/alaska-climate-change/

  2. Mass wasting on the submarine Lomonosov Ridge, central Arctic Ocean

    E-Print Network [OSTI]

    Kristoffersen, Yngve

    ) made from nuclear submarine Hawkbill (SCICEX). Bathymetry is derived from multi-beam measurements madeMass wasting on the submarine Lomonosov Ridge, central Arctic Ocean Yngve Kristoffersen a,, Bernard particulate matter in the water column accumulate as a uniform drape on submarine plateaus and ridges

  3. Source Attribution of Light Absorbing Aerosol in Arctic Snow

    E-Print Network [OSTI]

    Source Attribution of Light Absorbing Aerosol in Arctic Snow (Preliminary analysis of 2008 Biomass/poll. Factor: all data Pollution factor: depth data #12;2009 Data set for receptor modeling with limited analytes Factor 1: biomass Factor 2: pollution Factor 3: marine Factor 4: biomass #12;Factor

  4. Network Modeling of Arctic Melt Ponds Meenakshi Barjatiaa

    E-Print Network [OSTI]

    Golden, Kenneth M.

    Network Modeling of Arctic Melt Ponds Meenakshi Barjatiaa , Tolga Tasdizena,b, , Boya Songc. In late spring and summer, the albedo of the ice pack is determined primarily by melt ponds that form on the sea ice surface. The transition of pond configurations from isolated structures to interconnected

  5. Arctic ozone loss and climate sensitivity: Updated threedimensional model study

    E-Print Network [OSTI]

    Feng, Wuhu

    Arctic ozone loss and climate sensitivity: Updated three­dimensional model study Chipperfield winter­spring chemical ozone loss from 1991 2003, its observed correlation with low temperatures. CTM throughout studied. The model reproduces large column winters also captures shape of ozone loss profile

  6. Monday, March 23, 2009 PHOENIX: EXPLORATION OF THE MARTIAN ARCTIC

    E-Print Network [OSTI]

    Rathbun, Julie A.

    Monday, March 23, 2009 PHOENIX: EXPLORATION OF THE MARTIAN ARCTIC 8:30 a.m. Waterway Ballroom 1 Chairs: Raymond Arvidson Peter Smith 8:30 a.m. Smith P. H. * Water at the Phoenix Landing Site [#1329] The Phoenix mission found a water ice layer 5 cm beneath a dry soil overburden. The presence of Ca

  7. Review of technology for Arctic offshore oil and gas recovery

    SciTech Connect (OSTI)

    Sackinger, W. M.

    1980-08-01

    The technical background briefing report is the first step in the preparation of a plan for engineering research oriented toward Arctic offshore oil and gas recovery. A five-year leasing schedule for the ice-prone waters of the Arctic offshore is presented, which also shows the projected dates of the lease sale for each area. The estimated peak production rates for these areas are given. There is considerable uncertainty for all these production estimates, since no exploratory drilling has yet taken place. A flow chart is presented which relates the special Arctic factors, such as ice and permafrost, to the normal petroleum production sequence. Some highlights from the chart and from the technical review are: (1) in many Arctic offshore locations the movement of sea ice causes major lateral forces on offshore structures, which are much greater than wave forces; (2) spray ice buildup on structures, ships and aircraft will be considerable, and must be prevented or accommodated with special designs; (3) the time available for summer exploratory drilling, and for deployment of permanent production structures, is limited by the return of the pack ice. This time may be extended by ice-breaking vessels in some cases; (4) during production, icebreaking workboats will service the offshore platforms in most areas throughout the year; (5) transportation of petroleum by icebreaking tankers from offshore tanker loading points is a highly probable situation, except in the Alaskan Beaufort; and (6) Arctic pipelines must contend with permafrost, making instrumentation necessary to detect subtle changes of the pipe before rupture occurs.

  8. Intercomparison of model simulations of mixed-phase clouds observed during the ARM Mixed-Phase Arctic Cloud Experiment. Part I: Single layer cloud

    E-Print Network [OSTI]

    Klein, Stephen A.

    2009-01-01

    humidity above stratiform clouds on indirect aerosol climateOverview of Arctic cloud and radiation characteristics. J.of Arctic low-level clouds observed during the FIRE Arctic

  9. Collaborative Research: Towards Advanced Understanding and Predictive Capability of Climate Change in the Arctic using a High-Resolution Regional Arctic Climate System Model

    SciTech Connect (OSTI)

    Lettenmaier, Dennis P

    2013-04-08

    Primary activities are reported in these areas: climate system component studies via one-way coupling experiments; development of the Regional Arctic Climate System Model (RACM); and physical feedback studies focusing on changes in Arctic sea ice using the fully coupled model.

  10. Plant Root Characteristics and Dynamics in Arctic Tundra Ecosystems, 1960-2012

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

    Sullivan, Paddy; Sloan, Victoria; Warren, Jeff; McGuire, Dave; Euskirchen, Eugenie; Norby, Richard; Iversen, Colleen; Walker, Anthony; Wullschleger, Stan

    A synthesis of the available literature on tundra root distribution and dynamics, and their role in key ecosystem processes in the Arctic.

  11. Plant Root Characteristics and Dynamics in Arctic Tundra Ecosystems, 1960-2012

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

    Sullivan, Paddy; Sloan, Victoria; Warren, Jeff; McGuire, Dave; Euskirchen, Eugenie; Norby, Richard; Iversen, Colleen; Walker, Anthony; Wullschleger, Stan

    2014-01-13

    A synthesis of the available literature on tundra root distribution and dynamics, and their role in key ecosystem processes in the Arctic.

  12. Genome Sequence of the Arctic Methanotroph Methylobacter tundripaludum SV96

    SciTech Connect (OSTI)

    Svenning, Mette M [University of Tromso, Norway; Hestnes, Anne Grethe [University of Tromso, Norway; Wartiainen, Ingvild [University of Tromso, Norway; Stein, Lisa Y. [University of Alberta, Edmondton, Canada; Klotz, Martin G [University of Louisville, Louisville; Kalyuzhnaya, Marina G. [University of Washington, Seattle; Spang, Anja [University of Vienna, Austria; Bringel, Francoise O. [University of Strasbourg; Vuilleumier, Stephane [University of Strasbourg; Lajus, Aurelie [Genoscope/Centre National de la Recherche Scientifique-Unite Mixte de Recherche; Medigue, Claudine [Genoscope/Centre National de la Recherche Scientifique-Unite Mixte de Recherche; Bruce, David [Los Alamos National Laboratory (LANL); Cheng, Jan-Fang [U.S. Department of Energy, Joint Genome Institute; Goodwin, Lynne A. [Los Alamos National Laboratory (LANL); Ivanova, N [U.S. Department of Energy, Joint Genome Institute; Han, James [U.S. Department of Energy, Joint Genome Institute; Han, Cliff [Los Alamos National Laboratory (LANL); Hauser, Loren John [ORNL; Held, Brittany [Los Alamos National Laboratory (LANL); Land, Miriam L [ORNL; Lapidus, Alla L. [U.S. Department of Energy, Joint Genome Institute; Lucas, Susan [U.S. Department of Energy, Joint Genome Institute; Nolan, Matt [U.S. Department of Energy, Joint Genome Institute; Pitluck, Sam [U.S. Department of Energy, Joint Genome Institute; Woyke, Tanja [U.S. Department of Energy, Joint Genome Institute

    2011-01-01

    Methylobacter tundripaludum SV96(T) (ATCC BAA-1195) is a psychrotolerant aerobic methane-oxidizing gammaproteobacterium (Methylococcales, Methylococcaceae) living in High Arctic wetland soil. The strain was isolated from soil harvested in July 1996 close to the settlement Ny-Alesund, Svalbard, Norway (78 degrees 56'N, 11 degrees 53'E), and described as a novel species in 2006. The genome includes pmo and pxm operons encoding copper membrane monooxygenases (Cu-MMOs), genes required for nitrogen fixation, and the nirS gene implicated in dissimilatory nitrite reduction to NO but no identifiable inventory for further processing of nitrogen oxides. These genome data provide the basis to investigate M. tundripaludum SV96, identified as a major player in the biogeochemistry of Arctic environments.

  13. Analysis of gas chilling alternatives for Arctic pipelines

    SciTech Connect (OSTI)

    Dvoiris, A.; McMillan, D.K.; Taksa, B.

    1994-12-31

    The operation of buried natural gas pipelines in Arctic regions requires installation of gas chilling facilities at compressor stations. These facilities are required in order to cool compressed pipeline gases to temperatures below that of permanently frozen surrounding soil. If these pipeline gas temperatures are too high, the frozen ground around the pipelines will eventually thaw. This is undesirable for many reasons amongst which are ground settlement and possible catastrophic failure of the pipeline. This paper presents the results of a study which compared several alternative methods of gas chilling for possible application at one of the compressor stations on the proposed new Yamal-Center gas pipeline system in the Russian Arctic. This technical and economic study was performed by Gulf Interstate Engineering (GIE) for GAZPROM, the gas company in Russia that will own and operate this new pipeline system. Geotechnical, climatical and other information provided by GAZPROM, coupled with information developed by GIE, formed the basis for this study.

  14. Estimating Migration Resistance: a Case Study of Greenlandic Arctic Terns

    E-Print Network [OSTI]

    Hensz, Christopher

    2013-01-15

    Chris Hensz University of Kansas Department of Ecology and Evolutionary Biology Biodiversity Institute Estimating Migration Resistance: a Case Study of Greenlandic Arctic Terns The Problem 1: How do migratory animals choose... d ay °C m /s Models ? Implemented in R ? Models: ? Linear exploration Southern Migration, 9 birds, n=929 Northern Migration, 9 birds, n=629 Future Directions 1: Finish non-linear model 2: Generalize procedure and include...

  15. Planning the Next Generation of Arctic Ecosystem Experiments

    SciTech Connect (OSTI)

    Hinzman, Larry D [International Arctic Research Center; Wilson, Cathy [Los Alamos National Laboratory (LANL)

    2011-01-01

    Climate Change Experiments in High-Latitude Ecosystems; Fairbanks, Alaska, 13-14 October 2010; A 2-day climate change workshop was held at the International Arctic Research Center, University of Alaska Fairbanks. The workshop, sponsored by Biological and Environmental Research, Office of Science, U.S. Department of Energy (DOE), was attended by 45 subject matter experts from universities, DOE national laboratories, and other federal and nongovernmental organizations. The workshop sought to engage the Arctic science community in planning for a proposed Next-Generation Ecosystem Experiments (NGEE-Arctic) project in Alaska (http:// ngee.ornl.gov/). The goal of this activity is to provide data, theory, and models to improve representations of high-latitude terrestrial processes in Earth system models. In particular, there is a need to better understand the processes by which warming may drive increased plant productivity and atmospheric carbon uptake and storage in biomass and soils, as well as those processes that may drive an increase in the release of methane (CH{sub 4}) and carbon dioxide (CO{sub 2}) through microbial decomposition of soil carbon stored in thawing permafrost. This understanding is required to quantify the important feedback mechanisms that define the role of terrestrial processes in regional and global climate.

  16. Polar Gas to pick route for Arctic Y Line

    SciTech Connect (OSTI)

    Not Available

    1980-05-26

    Polar Gas Project is considering four possible Y line routes to move gas reserves from the Arctic Islands and the MacKenzie Delta/Beaufort Sea areas to southern Canada. All four routes are west of the single line route proposed by Polar Gas Ltd. in 1977 to run from the Arctic Islands to Longlac, Ontario, and would connect with existing pipelines at either Longlac, Winnipeg, Calgary, or Edmonton. Marketable reserves in the High Arctic Islands are estimated at 12.7 trillion cubic feet, not counting 3-6 trillion cubic feet probably contained in recent discoveries; the MacKenzie Delta reserves are estimated at 5.8 trillion cubic feet. The gas will be chilled to 0C for passage through permafrost regions, to prevent thawing of the soil, but the gas will be at higher temperatures in other areas, with various construction techniques used to protect the area of discontinuous permafrost from thawing. More than $70 million has been spent on project studies. An application will be filed in 1981, and the pipeline could be completed in 7-10 years.

  17. The unseen iceberg: Plant roots in arctic tundra

    SciTech Connect (OSTI)

    Iversen, Colleen M; Sloan, Victoria L; Sullivan, Patrick F.; Euskirchen, Eugenie S; McGuire, A. David; Norby, Richard J; Walker, Anthony P; Warren, Jeffrey; Wullschleger, Stan D

    2015-01-01

    Arctic tundra is characterized by short-statured plant communities underlain by carbon (C)-rich soils and permafrost. Ecosystem C and nutrient cycles in tundra are driven by complex interactions between plants and their environment. However, root dynamics are one of the least understood aspects of plant growth in the Arctic. We synthesized available literature on tundra roots and discussed their representation in terrestrial biosphere models. Belowground biomass in tundra ecosystems can be an order of magnitude larger than aboveground biomass. Data on root production and turnover in tundra is sparse, limiting our understanding of the controls over root dynamics in these systems. Roots are shallowly distributed in the thin layer of soil that thaws each year, and are often found in the organic horizon at the soil surface. Species-specific differences in root distribution, mycorrhizal colonization, and resource partitioning may affect plant species competition under changing climatic conditions. Model representation of belowground processes has increased in complexity over recent years, but data are desperately needed to fill the gaps in model treatment of tundra roots. Future research should focus on estimates of root production and lifespan, and interactions between roots and the surrounding soil across the diversity of tundra ecosystems in the Arctic.

  18. Methane transport from the active layer to lakes in the Arctic using Toolik Lake, Alaska, as a case study

    E-Print Network [OSTI]

    Paytan, Adina

    Methane transport from the active layer to lakes in the Arctic using Toolik Lake, Alaska, as a case, and approved February 13, 2015 (received for review September 8, 2014) Methane emissions in the Arctic are important, and may be contributing to global warming. While methane emission rates from Arctic lakes

  19. Directional change in upland tundra plant communities 20-30 years after seismic exploration in the Canadian low-arctic

    E-Print Network [OSTI]

    Macdonald, Ellen

    in the Canadian low-arctic Kemper, J. Todd1,2 & Macdonald, S. Ellen1Ã 1 Department of Renewable Resources Energy Board of Canada. Introduction Arctic tundra plant communities are subject to both natural of low-arctic plant communities two to three decades after seismic ex- ploration. Location: Mackenzie

  20. Multiple Effects of Changes in Arctic Snow Cover Terry V. Callaghan, Margareta Johansson, Ross D. Brown, Pavel Ya. Groisman,

    E-Print Network [OSTI]

    Bradley, Raymond S.

    , there are likely to be some benefits from a changing Arctic snow regime such as more even run-off from melting snow that favours hydropower operations. Keywords Snow Á Arctic Á Climate Á Albedo Á Hydrology Á Ecology Á and river ice surfaces for 8­10 months each year. Arctic climate has entered a unique period relative

  1. The impact of precession changes on the Arctic climate during the last interglacialglacial transition

    E-Print Network [OSTI]

    Born, Andreas

    The impact of precession changes on the Arctic climate during the last interglacial­glacial temperature to the summer Arctic melt process are evaluated. Timing of the perihelion is varied in each melting of snow is found primarily as a result of feedbacks from the delayed seasonal cycle of hydrologic

  2. Ascorbate dynamics and oxygen consumption during arousal from hibernation in Arctic ground squirrels

    E-Print Network [OSTI]

    Drew, Kelly L.

    at the time of peak O2 consumption and peak plasma urate production. The ascor- bate decrease didAscorbate dynamics and oxygen consumption during arousal from hibernation in Arctic ground and oxygen consumption during arousal from hibernation in Arctic ground squirrels. Am J Physiol Regulatory

  3. Potential DOC production from size-fractionated Arctic tundra soils Chunhao Xu a,b

    E-Print Network [OSTI]

    Guo, Laodong

    and available for biogeochemical cycling through coastal erosion (Rachold et al., 2000; Guo et al., 2004 of Alaska Fairbanks, Fairbanks, AK 99775, USA b International Arctic Research Center, University of Alaska Permafrost Alaska Soil organic carbon (SOC) accumulated inthe Arctic regions has beensubject to impacts

  4. SIMULATION OF BLOWING SNOW IN THE CANADIAN ARCTIC USING A DOUBLE-MOMENT MODEL

    E-Print Network [OSTI]

    Dery, Stephen

    SIMULATION OF BLOWING SNOW IN THE CANADIAN ARCTIC USING A DOUBLE-MOMENT MODEL STEPHEN J. DÉRY and M the development of a double-moment model of blowing snow and its application to the Canadian Arctic. We first snow mixing ratio and total particle num- bers, both moments of particles that are gamma

  5. Vegetation characteristics and primary productivity along an arctic transect: implications for scaling-up

    E-Print Network [OSTI]

    , and changes in the region's energy balance. Arctic terrestrial ecosystems are important com- ponents of the global C cycle. They cover an area of more than 7 Â 106 km2 and contain over 11% of the world's organic matter pool (Callaghan & Maxwell 1995). Studies of the C balance of speci®c arctic tun- dra ecosystems

  6. National Strategy for the Arctic Region Tribal Consultation and Stakeholder Outreach Session: Kotzebue

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy (DOE) is announcing the second round of tribal consultations and stakeholder outreach meetings on the National Strategy for the Arctic Region (NSAR), 10-Year Plan to accelerate renewable energy deployment in the Arctic Region.

  7. National Strategy for the Arctic Region Stakeholder Outreach Meeting: Dutch Harbor/Unalaska

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy (DOE) is announcing the second round of tribal consultations and stakeholder outreach meetings on the National Strategy for the Arctic Region (NSAR), 10-Year Plan to accelerate renewable energy deployment in the Arctic Region.

  8. National Strategy for the Arctic Region Tribal Consultation Session: Dutch Harbor/Unalaska

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy (DOE) is announcing the second round of tribal consultations and stakeholder outreach meetings on the National Strategy for the Arctic Region (NSAR), 10-Year Plan to accelerate renewable energy deployment in the Arctic Region.

  9. The Arctic Ocean carbon sink G.A. MacGilchrist a,n

    E-Print Network [OSTI]

    Naveira Garabato, Alberto

    Carbon sequestration Biological pump a b s t r a c t We present observation based estimatesThe Arctic Ocean carbon sink G.A. MacGilchrist a,n , A.C. Naveira Garabato a , T. Tsubouchi b , S January 2014 Keywords: Arctic Ocean Dissolved inorganic carbon Carbon budget Air­sea carbon dioxide flux

  10. A model of the threedimensional evolution of Arctic melt ponds on firstyear and multiyear sea ice

    E-Print Network [OSTI]

    Feltham, Daniel

    A model of the threedimensional evolution of Arctic melt ponds on firstyear and multiyear sea ice F in Arctic melt ponds on the surface of sea ice. An accurate estimate of the fraction of the sea ice surface covered in melt ponds is essential for a realistic estimate of the albedo for global climate models. We

  11. JP2.3 CLOUD RADIATIVE HEATING RATE FORCING FROM PROFILES OF RETRIEVED ARCTIC CLOUD MICROPHYSICS

    E-Print Network [OSTI]

    Shupe, Matthew

    JP2.3 CLOUD RADIATIVE HEATING RATE FORCING FROM PROFILES OF RETRIEVED ARCTIC CLOUD MICROPHYSICS). This data allows for observationally-based calculations ofradiative heating rate profiles within the Arctic atmosphere. In this paper we define cloud radiative heating rate forcing (CRHF) as the difference between

  12. Mobilization pathways of organic carbon from permafrost to arctic rivers in a changing climate

    E-Print Network [OSTI]

    Guo, Laodong

    Mobilization pathways of organic carbon from permafrost to arctic rivers in a changing climate rivers and Arctic coastal regions. To elucidate the transport pathways of SOC, radiocarbon composition is more readily influenced by modern terrestrial biomass, especially in large river basins which also

  13. Arctic ice export events and their potential impact on global climate during the late Pleistocene

    E-Print Network [OSTI]

    Darby, Dennis

    Arctic ice export events and their potential impact on global climate during the late Pleistocene export events are identified from the Laurentide and the Innuitian ice sheets, between 14 and 34 ka, the Arctic export events appear to occur prior to Heinrich events. INDEX TERMS: 4207 Oceanography: General

  14. ORIGINAL PAPER Sedimentary pellets as an ice-cover proxy in a High Arctic

    E-Print Network [OSTI]

    Vincent, Warwick F.

    ORIGINAL PAPER Sedimentary pellets as an ice-cover proxy in a High Arctic ice-covered lake Jessica-cover extent and dynamics on this perennially ice-covered, High Arctic lake. These pellets are interpreted growth. The pellets remain frozen in the ice until a summer or series of summers with reduced ice cover

  15. Sources and Fate of Chromophoric Dissolved Organic Matter in the Arctic Ocean and Surrounding Watersheds 

    E-Print Network [OSTI]

    Walker, Sally Annette

    2012-10-19

    of the Canadian Archipelago, 17 % of the DOM pool is of terrestrial origin, even though waters are diluted with sea ice melt, suggesting the likelihood of a subsurface plume of tDOM entrained within river runoff from Arctic Rivers. In the interior Arctic...

  16. Impacts of ocean albedo alteration on Arctic sea ice restoration and Northern Hemisphere climate

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

    Cvijanovic, Ivana; Caldeira, Ken; MacMartin, Douglas G.

    2015-04-01

    The Arctic Ocean is expected to transition into a seasonally ice-free state by mid-century, enhancing Arctic warming and leading to substantial ecological and socio-economic challenges across the Arctic region. It has been proposed that artificially increasing high latitude ocean albedo could restore sea ice, but the climate impacts of such a strategy have not been previously explored. Motivated by this, we investigate the impacts of idealized high latitude ocean albedo changes on Arctic sea ice restoration and climate. In our simulated 4xCO? climate, imposing surface albedo alterations over the Arctic Ocean leads to partial sea ice recovery and a modestmore »reduction in Arctic warming. With the most extreme ocean albedo changes, imposed over the area 70°–90°N, September sea ice cover stabilizes at ~40% of its preindustrial value (compared to ~3% without imposed albedo modifications). This is accompanied by an annual mean Arctic surface temperature decrease of ~2 °C but no substantial global mean temperature decrease. Imposed albedo changes and sea ice recovery alter climate outside the Arctic region too, affecting precipitation distribution over parts of the continental United States and Northeastern Pacific. For example, following sea ice recovery, wetter and milder winter conditions are present in the Southwest United States while the East Coast experiences cooling. We conclude that although ocean albedo alteration could lead to some sea ice recovery, it does not appear to be an effective way of offsetting the overall effects of CO? induced global warming.« less

  17. Growing season methyl bromide and methyl chloride fluxes at a sub-arctic wetland in Sweden 

    E-Print Network [OSTI]

    Hardacre, Catherine J.; Blei, Emanuel; Heal, Mathew R

    2009-01-01

    Methyl bromide and methyl chloride fluxes were measured at several sites in a sub-arctic wetland near Abisko, Sweden (68°28?N 18°49?E) throughout the 2008 growing season. Averaged over 92 flux measurements the sub-arctic ...

  18. Latitudinal gradients in sea ice and primary production determine Arctic seabird colony

    E-Print Network [OSTI]

    Laidre, Kristin L.

    -scale control on energy flux and primary and secondary production, ultimately reaching the top of the food chainLatitudinal gradients in sea ice and primary production determine Arctic seabird colony size Naturama, Dronningemaen 30, 5700 Svendborg, Denmark 4 Department of Arctic Environment, National

  19. Be production-rate calibration for the Arctic NICOLA S E. YOUNG,1,2

    E-Print Network [OSTI]

    Briner, Jason P.

    A 10 Be production-rate calibration for the Arctic NICOLA´ S E. YOUNG,1,2 * JOERG M. SCHAEFER,1 2013; Accepted 18 April 2013 ABSTRACT: We present a Baffin Bay 10 Be production-rate calibration published 10 Be calibration datasets to develop an Arctic 10 Be production rate. Our calibration comprises

  20. The Role of Circulation Features on Black Carbon Transport into the Arctic in the Community Atmosphere Model Version 5 (CAM5)

    SciTech Connect (OSTI)

    Ma, Po-Lun; Rasch, Philip J.; Wang, Hailong; Zhang, Kai; Easter, Richard C.; Tilmes, S.; Fast, Jerome D.; Liu, Xiaohong; Yoon, Jin-Ho; Lamarque, Jean-Francois

    2013-05-28

    Current climate models generally under-predict the surface concentration of black carbon (BC) in the Arctic due to the uncertainties associated with emissions, transport, and removal. This bias is also present in the Community Atmosphere Model Version 5.1 (CAM5). In this study, we investigate the uncertainty of Arctic BC due to transport processes simulated by CAM5 by configuring the model to run in an “offline mode” in which the large-scale circulations are prescribed. We compare the simulated BC transport when the offline model is driven by the meteorology predicted by the standard free-running CAM5 with simulations where the meteorology is constrained to agree with reanalysis products. Some circulation biases are apparent: the free-running CAM5 produces about 50% less transient eddy transport of BC than the reanalysis-driven simulations, which may be attributed to the coarse model resolution insufficient to represent eddies. Our analysis shows that the free-running CAM5 reasonably captures the essence of the Arctic Oscillation (AO), but some discernable differences in the spatial pattern of the AO between the free-running CAM5 and the reanalysis-driven simulations result in significantly different AO modulation of BC transport over Northeast Asia and Eastern Europe. Nevertheless, we find that the overall climatological circulation patterns simulated by the free-running CAM5 generally resembles those from the reanalysis products, and BC transport is very similar in both simulation sets. Therefore, the simulated circulation features regulating the long-range BC transport is unlikely the most important cause of the large under-prediction of surface BC concentration in the Arctic.

  1. Arctic melt ponds and bifurcations in the climate system

    E-Print Network [OSTI]

    Sudakov, Ivan; Golden, Kenneth M

    2014-01-01

    Understanding how sea ice melts is critical to climate projections. In the Arctic, melt ponds that develop on the surface of sea ice floes during the late spring and summer largely determine their albedo $-$ a key parameter in climate modeling. Here we explore the possibility of a simple sea ice climate model passing through a bifurcation point $-$ an irreversible critical threshold as the system warms, by incorporating geometric information about melt pond evolution. This study is based on a nonlinear phase transition model for melt ponds, and bifurcation analysis of a simple climate model with ice - albedo feedback as the key mechanism driving the system to a potential bifurcation point.

  2. Method for preventing thaw settlement along offshore arctic pipelines

    SciTech Connect (OSTI)

    Duthweiler, F.C.

    1987-06-30

    A method is described for installing a warm fluid-bearing pipeline across an arctic seafloor, the method comprising: (1) drilling a series of boreholes along the seafloor through a thawed zone of subsea soil to penetrate a distance into a zone of permafrost; (2) circulating a warm circulation fluid through the boreholes to create a slump trough on the surface of the seafloor by creating a prethawing zone in the permafrost zone; and (3) installing a pipeline bearing a warm fluid along the bottom of the slump trough without causing further substantial slumping along the seafloor.

  3. ARM - Field Campaign - Arctic Winter Water Vapor IOP

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach HomeA Better Anode Design to Improve4AJ01) (See22, 2012IIIAtlantic (ACE-ENA)StudygovCampaignsArctic

  4. ARM - Field Campaign - FIRE-Arctic Cloud Experiment/SHEBA

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach HomeA Better Anode Design to Improve4AJ01)govCampaignsFIRE-Arctic Cloud Experiment/SHEBA ARM Data

  5. ARM - Field Campaign - Mixed-Phase Arctic Cloud Experiment

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach HomeA Better Anode Design togovCampaignsMASRAD: Pt. Reyes Stratus(MC3E):govCampaignsMixed-Phase Arctic

  6. Status of Wind-Diesel Applications in Arctic Climates: Preprint

    SciTech Connect (OSTI)

    Baring-Gould, I.; Corbus, D.

    2007-12-01

    The rising cost of diesel fuel and the environmental regulation for its transportation, use, and storage, combined with the clear impacts of increased arctic temperatures, is driving remote communities to examine alternative methods of providing power. Over the past few years, wind energy has been increasingly used to reduce diesel fuel consumption, providing economic, environmental, and security benefits to the energy supply of communities from Alaska to Antarctica. This summary paper describes the current state of wind-diesel systems, reviews the operation of wind-diesel plants in cold climates, discusses current research activities pertaining to these systems, and addresses their technical and commercial challenges. System architectures, dispatch strategies, and operating experience from a variety of wind-diesel systems in Alaska will be reviewed. Specific focus will also be given to the control of power systems with large amounts of wind generation and the complexities of replacing diesel engine waste heat with excess wind energy, a key factor in assessing power plants for retrofit. A brief overview of steps for assessing the viability of retrofitting diesel power systems with wind technologies will also be provided. Because of the large number of isolated diesel minigrids, the market for adding wind to these systems is substantial, specifically in arctic climates and on islands that rely on diesel-only power generation.

  7. The Impact of Global Warming on the Carbon Cycle of Arctic Permafrost...

    Office of Scientific and Technical Information (OSTI)

    Technical Report: The Impact of Global Warming on the Carbon Cycle of Arctic Permafrost: An Experimental and Field Based Study Citation Details In-Document Search Title: The Impact...

  8. Source attributions of pollution to the Western Arctic during the NASA ARCTAS field campaign

    E-Print Network [OSTI]

    2013-01-01

    plumes intercepted by the NASA DC-8 aircraft during theand Woollen, J. : MERRA: NASA’s Modern-Era RetrospectiveWestern Arctic during the NASA ARCTAS field campaign H. P.

  9. The NGEE Arctic Data Archive -- Portal for Archiving and Distributing Data and Documentation

    SciTech Connect (OSTI)

    Boden, Thomas A; Palanisamy, Giri; Devarakonda, Ranjeet; Killeffer, Terri S; Krassovski, Misha B; Hook, Leslie A

    2014-01-01

    The Next-Generation Ecosystem Experiments (NGEE Arctic) project is committed to implementing a rigorous and high-quality data management program. The goal is to implement innovative and cost-effective guidelines and tools for collecting, archiving, and sharing data within the project, the larger scientific community, and the public. The NGEE Arctic web site is the framework for implementing these data management and data sharing tools. The open sharing of NGEE Arctic data among project researchers, the broader scientific community, and the public is critical to meeting the scientific goals and objectives of the NGEE Arctic project and critical to advancing the mission of the Department of Energy (DOE), Office of Science, Biological and Environmental (BER) Terrestrial Ecosystem Science (TES) program.

  10. Satellite Retrievals of Arctic and Equatorial Rain and Snowfall Rates Using Millimeter Wavelengths

    E-Print Network [OSTI]

    Surussavadee, Chinnawat

    A new global precipitation retrieval algorithm for the millimeter-wave Advanced Microwave Sounding Unit is presented that also retrieves Arctic precipitation rates over surface snow and ice. This algorithm improves upon ...

  11. Building skills : a construction trades training facility for the eastern Canadian Arctic

    E-Print Network [OSTI]

    Roszler, Sarah Katherine, 1977-

    2005-01-01

    On April 1, 1999, the Inuit of the Eastern Canadian Arctic achieved sovereignty over a new territory, Nunavut, envisioning economic self-reliance, political self-determination, and renewal of confidence in Inuit community. ...

  12. Impacts of Climate Change on Human Access and Resource Development in the Arctic

    E-Print Network [OSTI]

    Stephenson, Scott Ryan

    2014-01-01

    C. (2014). Russian Arctic LNG project to name shippers,tax breaks to benefit Yamal LNG project (21 October). Globalthe first- ever transit by an LNG carrier in November 2012 (

  13. bowhead whales. The Naval Arctic Re-search Laboratory at Barrow, Alaska,

    E-Print Network [OSTI]

    , Greenland whale, or bowhead. Unpubl. manuscr. [Vol. 15, Encyclopedia Arctica], 71 p. Avail. Dartmouth. Biology of the bowhead whale (Sa/aena mysticetus) in the western Arctic. Unpubl. manuscr., 93 p. Dep. Bio

  14. Assessing the Predictability of the Beaufort Sea Minimum Ice Extent in a Changing Arctic Climate Regime 

    E-Print Network [OSTI]

    Quirk, Laura Marie

    2014-04-25

    Understanding the climatic drivers of changes in sea ice extent in the Arctic has become increasingly important as record minima in the September sea ice extent continue to be reached. This research therefore addresses the question of which synoptic...

  15. Simulated Response of the Arctic Freshwater Budget to Extreme NAO Wind Forcing

    E-Print Network [OSTI]

    Condron, Alan

    The authors investigate the response of the Arctic Ocean freshwater budget to changes in the North Atlantic Oscillation (NAO) using a regional-ocean configuration of the Massachusetts Institute of Technology GCM (MITgcm) ...

  16. Patterns of shrub expansion in Alaskan arctic river corridors suggest phase transition 

    E-Print Network [OSTI]

    Naito, Adam T; Cairns, David M

    2015-01-01

    of tall shrubs. Given current understanding of the local-scale implications for hydrol- ogy, surface energy balances, and carbon and nutrient cycling as a result of enhanced shrub cover, the comple- tion of this phase transition will alter tundra ecosystem... in Alaskan arctic river corridors suggest phase transition Adam T. Naito & David M. Cairns Department of Geography, Texas A&M University, 810 Eller O&M Building, Mailstop 3147 TAMU, College Station, Texas 77843-3147 Keywords Alaska, Arctic, landscape analysis...

  17. A 10 Year Climatology of Arctic Cloud Fraction and Radiative Forcing at Barrow, Alaska

    SciTech Connect (OSTI)

    Dong, Xiquan; Xi, Baike; Crosby, Kathryn; Long, Charles N.; Stone, R. S.; Shupe, Matthew D.

    2010-09-15

    A 10-yr record of Arctic cloud fraction and surface radiation budget has been generated using data collected from June 1998 to May 2008 at the Atmospheric Radiation Measurement (ARM) North Slope of Alaska (NSA) site and the nearby NOAA Barrow Observatory (BRW). The record includes the seasonal variations of cloud fraction (CF), cloud liquid water path (LWP), precipitable water vapor (PWV), surface albedo, shortwave (SW) and longwave (LW) fluxes and cloud radative forcings (CRFs), as well as their decadal variations. Values of CF derived from different instruments and methods agree well, having an annual average of ~0.74. Cloudiness increases from March to May, remains high (~0.8-0.9) from May to October, and then decreases over winter. More clouds and higher LWP and PWV occurred during the warm season (May-October) than the cold season (November-April). These results are strongly associated with southerly flow which transports warm, moist air masses to Barrow from the North Pacific and over area of Alaska already free of snow during the warm season and with a dipole pattern of pressure in which a high is centered over the Beaufort Sea and low over the Aleutians during the cold season. The monthly means of estimated clear-sky and measured allsky SW-down and LW-down fluxes at the two facilities are almost identical with the annual mean differences less than 1.6 W m-2. The downwelling and upwelling LW fluxes remain almost constant from January to March, then increase from March and peak during July-August. SW-down fluxes are primarily determined by seasonal changes in the intensity and duration of insolation over Northern Alaska, and are also strongly dependent on cloud fraction and optical depth, and surface albedo. The monthly variations of NET CRF generally follow the cycle of SW CRF, modulated by LW effects. On annual average, the negative SW CRF and positive LW CRF tend to cancel, resulting in annual average NET CRF of 2-4.5 Wm-2. Arctic clouds have a 3 net warming effect on the surface throughout the year, with exception of the snow-free period from middle June to middle September when there tends to be a cooling effect. The daily average surface albedos agree well at the two sites remaining high (>0.8) until late May, dropping below 0.2 after the snow melts around June and increasing during autumn once snow begins to accumulate. On the basis of long-term regression analyses CF has decreased by about 0.048 while temperature has risen by ?1.1 K over the 10-yr period, which can be characterized by tendencies of warming mainly during December and April. With regard to the 2007 record minimum Arctic ice extent, this study provides additional empirical evidence that decreased cloud cover and increased SW-down flux during summer contributed to anomalous ice melt in the region north of Barrow. At Barrow, average June-August CF decreased by 0.062 in 2007 from the 10-yr mean, while SW-down and NET fluxes increased by 28.4 Wm-2 and 11.3 Wm-2, respectively. The increase in the NET radiative flux during summer 2007 most likely contributed to an increase in surface air temperature of 1.6 K.

  18. Ising model for melt ponds on Arctic sea ice

    E-Print Network [OSTI]

    Ma, Y -P; Golden, K M

    2014-01-01

    The albedo of melting Arctic sea ice, a key parameter in climate modeling, is determined by pools of water on the ice surface. Recent observations show an onset of pond complexity at a critical area of about 100 square meters, attended by a transition in pond fractal dimension. To explain this behavior and provide a statistical physics approach to sea ice modeling, we introduce a two dimensional Ising model for pond evolution which incorporates ice-albedo feedback and the underlying thermodynamics. The binary magnetic spin variables in the Ising model correspond to the presence of melt water or ice on the sea ice surface. The model exhibits a second-order phase transition from isolated to clustered melt ponds, with the evolution of pond complexity in the clustered phase consistent with the observations.

  19. Active layer dynamics and arctic hydrology and meteorology. Final report

    SciTech Connect (OSTI)

    Not Available

    1993-10-01

    Man`s impact on the environment is increasing with time. To be able to evaluate anthropogenic impacts on an ecosystems, it is necessary first to understand all facets of how the ecosystems works: what the main processes (physical, biological, chemical) are, at what rates they proceed, and how they can be manipulated. Arctic ecosystems are dominated by physical processes of energy exchange. This project has concentrated on a strong program of hydrologic and meteorologic data collection, to better understand dominant physical processes. Field research focused on determining the natural annual and diurnal variability of meteorologic and hydrologic variables, especially those which may indicate trends in climatic change. Comprehensive compute models are being developed to simulate physical processes occurring under the present conditions and to simulate processes under the influence of climatic change.

  20. Development, sensitivity analysis, and uncertainty quantification of high-fidelity arctic sea ice models.

    SciTech Connect (OSTI)

    Peterson, Kara J.; Bochev, Pavel Blagoveston; Paskaleva, Biliana S.

    2010-09-01

    Arctic sea ice is an important component of the global climate system and due to feedback effects the Arctic ice cover is changing rapidly. Predictive mathematical models are of paramount importance for accurate estimates of the future ice trajectory. However, the sea ice components of Global Climate Models (GCMs) vary significantly in their prediction of the future state of Arctic sea ice and have generally underestimated the rate of decline in minimum sea ice extent seen over the past thirty years. One of the contributing factors to this variability is the sensitivity of the sea ice to model physical parameters. A new sea ice model that has the potential to improve sea ice predictions incorporates an anisotropic elastic-decohesive rheology and dynamics solved using the material-point method (MPM), which combines Lagrangian particles for advection with a background grid for gradient computations. We evaluate the variability of the Los Alamos National Laboratory CICE code and the MPM sea ice code for a single year simulation of the Arctic basin using consistent ocean and atmospheric forcing. Sensitivities of ice volume, ice area, ice extent, root mean square (RMS) ice speed, central Arctic ice thickness, and central Arctic ice speed with respect to ten different dynamic and thermodynamic parameters are evaluated both individually and in combination using the Design Analysis Kit for Optimization and Terascale Applications (DAKOTA). We find similar responses for the two codes and some interesting seasonal variability in the strength of the parameters on the solution.

  1. Sensitivity of CAM5-Simulated Arctic Clouds and Radiation to Ice Nucleation Parameterization

    SciTech Connect (OSTI)

    Xie, Shaocheng; Liu, Xiaohong; Zhao, Chuanfeng; Zhang, Yuying

    2013-08-01

    Sensitivity of Arctic clouds and radiation in the Community Atmospheric Model version 5 to the ice nucleation process is examined by testing a new physically based ice nucleation scheme that links the variation of ice nuclei (IN) number concentration to aerosol properties. The default scheme parameterizes the IN concentration simply as a function of ice supersaturation. The new scheme leads to a significant reduction in simulated IN number concentrations at all latitudes while changes in cloud amount and cloud properties are mainly seen in high latitudes and middle latitude storm tracks. In the Arctic, there is a considerable increase in mid-level clouds and a decrease in low clouds, which result from the complex interaction among the cloud macrophysics, microphysics, and the large-scale environment. The smaller IN concentrations result in an increase in liquid water path and a decrease in ice water path due to the slow-down of the Bergeron-Findeisen process in mixed-phase clouds. Overall, there is an increase in the optical depth of Arctic clouds, which leads to a stronger cloud radiative forcing (net cooling) at the top of the atmosphere. The comparison with satellite data shows that the new scheme slightly improves low cloud simulations over most of the Arctic, but produces too many mid-level clouds. Considerable improvements are seen in the simulated low clouds and their properties when compared to Arctic ground-based measurements. Issues with the observations and the model-observation comparison in the Arctic region are discussed.

  2. An AeroCom Assessment of Black Carbon in Arctic Snow and Sea Ice

    SciTech Connect (OSTI)

    Jiao, C.; Flanner, M. G.; Balkanski, Y.; Bauer, S.; Bellouin, N.; Berntsen, T.; Bian, Huisheng; Carslaw, K. S.; Chin, Mian; De Luca, N.; Diehl, Thomas; Ghan, Steven J.; Iversen, T.; Kirkevag, A.; Koch, Dorothy; Liu, Xiaohong; Mann, G. W.; Penner, Joyce E.; Pitari, G.; Schulz, M.; Seland, O.; Skeie, R. B.; Steenrod, Stephen D.; Stier, P.; Takemura, T.; Tsigaridis, Kostas; van Noije, T.; Yun, Yuxing; Zhang, Kai

    2014-03-07

    Though many global aerosols models prognose surface deposition, only a few models have been used to directly simulate the radiative effect from black carbon (BC) deposition to snow and sea-ice. Here, we apply aerosol deposition fields from 25 models contributing to two phases of the Aerosol Comparisons between Observations and Models (AeroCom) project to simulate and evaluate within snow BC concentrations and radiative effect in the Arctic. We accomplish this by driving the offline land and sea-ice components of the Community Earth System Model with different deposition fields and meteorological conditions from 2004-2009, during which an extensive field campaign of BC measurements in Arctic snow occurred. We find that models generally underestimate BC concentrations in snow in northern Russia and Norway, while overestimating BC amounts elsewhere in the Arctic. Although simulated BC distributions in snow are poorly correlated with measurements, mean values are reasonable. The multi-model mean (range) bias in BC concentrations, sampled over the same grid cells, snow depths, and months of measurements, are -4.4 (-13.2 to +10.7) ng g?1 for an earlier Phase of AeroCom models (Phase I), and +4.1 (-13.0 to +21.4) ng g?1 for a more recent Phase of AeroCom models (Phase II), compared to the observational mean of 19.2 ng g?1. Factors determining model BC concentrations in Arctic snow include Arctic BC emissions, transport of extra-Arctic aerosols, precipitation, deposition efficiency of aerosols within the Arctic, and meltwater removal of particles in snow. Sensitivity studies show that the model–measurement evaluation is only weakly affected by meltwater scavenging efficiency because most measurements were conducted in non-melting snow. The Arctic (60-90?N) atmospheric residence time for BC in Phase II models ranges from 3.7 to 23.2 days, implying large inter-model variation in local BC deposition efficiency. Combined with the fact that most Arctic BC deposition originates from extra-Arctic emissions, these results suggest that aerosol removal processes are a leading source of variation in model performance. The multi-model mean (full range) of Arctic radiative effect from BC in snow is 0.15 (0.07-0.25) W m?2 and 0.18 (0.06-0.28) W m?2 in Phase I and Phase II models, respectively. After correcting for model biases relative to observed BC concentrations in different regions of the Arctic, we obtain a multi-model mean Arctic radiative effect of 0.17 W m?2 for the combined AeroCom ensembles. Finally, there is a high correlation between modeled BC concentrations sampled over the observational sites and the Arctic as a whole, indicating that the field campaign provided a reasonable sample of the Arctic.

  3. Reactive nitrogen, ozone and ozone production in the Arctic troposphere and the impact of stratosphere-troposphere exchange

    E-Print Network [OSTI]

    2011-01-01

    and Logan, J. A. : Atmospheric chemistry in the Arctic andIntroduction to Atmospheric Chemistry, Princeton University3.0 License. Atmospheric Chemistry and Physics Reactive

  4. Dynamics of Arctic and Sub-Arctic Climate and Atmospheric Circulation: Diagnosis of Mechanisms and Biases Using Data Assimilation

    SciTech Connect (OSTI)

    Eric T. DeWeaver

    2010-02-17

    The overall goal of work performed under this grant is to enhance understanding of simulations of present-day climate and greenhouse gas-induced climate change. The examination of present-day climate also includes diagnostic intercomparison of model simulations and observed mean climate and climate variability using reanalysis and satellite datasets. Enhanced understanding is desirable 1) as a prerequisite for improving simulations; 2) for assessing the credibility of model simulations and their usefulness as tools for decision support; and 3) as a means to identify robust behaviors which commonly occur over a wide range of models, and may yield insights regarding the dominant physical mechanisms which determine mean climate and produce climate change. A further objective is to investigate the use of data assimilation as a means for examining and correcting model biases. Our primary focus is on the Arctic, but the scope of the work was expanded to include the global climate system.

  5. Dynamics of Arctic and Sub-Arctic Climate and Atmospheric Circulation: Diagnosis of Mechanisms and Biases Using Data Assimilation

    SciTech Connect (OSTI)

    Eric T. DeWeaver

    2010-01-19

    This is the final report for DOE grant DE-FG02-07ER64434 to Eric DeWeaver at the University of Wisconsin-Madison. The overall goal of work performed under this grant is to enhance understanding of simulations of present-day climate and greenhouse gas-induced climate change. Enhanced understanding is desirable 1) as a prerequisite for improving simulations; 2) for assessing the credibility of model simulations and their usefulness as tools for decision support; and 3) as a means to identify robust behaviors which commonly occur over a wide range of models, and may yield insights regarding the dominant physical mechanisms which determine mean climate and produce climate change. A furthe objective is to investigate the use of data assimilation as a means for examining and correcting model biases. Our primary focus is on the Arctic, but the scope of the work was expanded to include the global climate system to the extent that research targets of opportunity present themselves. Research performed under the grant falls into five main research areas: 1) a study of data assimilation using an ensemble filter with the atmospheric circulation model of the National Center for Atmospheric Research, in which both conventional observations and observations of the refraction of radio waves from GPS satellites were used to constrain the atmospheric state of the model; 2) research on the likely future status of polar bears, in which climate model simluations were used to assess the effectiveness of climate change mitigation efforts in preserving the habitat of polar bears, now considered a threatened species under global warming; 3) as assessment of the credibility of Arctic sea ice thickness simulations from climate models; 4) An examination of the persistence and reemergence of Northern Hemisphere sea ice area anomalies in climate model simulations and in observations; 5) An examination of the roles played by changes in net radiation and surface relative humidity in determine the response of the hydrological cycle to global warming.

  6. File:EIA-AK-NPRA-ANWR-BOE.pdf | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History View New Pages Recent Changes AllApschem.pdf Jump to:Colorado WaterGas.pdf Jump to:BOE.pdf Jump to:

  7. File:EIA-AK-NPRA-ANWR-GAS.pdf | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History View New Pages Recent Changes AllApschem.pdf Jump to:Colorado WaterGas.pdf Jump to:BOE.pdf Jump

  8. File:EIA-AK-NPRA-ANWR-LIQ.pdf | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History View New Pages Recent Changes AllApschem.pdf Jump to:Colorado WaterGas.pdf Jump to:BOE.pdf

  9. Figure 2. Stratigraphic Summary of Ages, Names and Rock Types in the ANWR

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustments (Billion Cubic Feet) Wyoming963 1.969CentralWells (Million CubicBased1002 2. Stratigraphic

  10. Arctic melt ponds and bifurcations in the climate system I. Sudakova,, S. A. Vakulenkob,c, K. M. Goldena

    E-Print Network [OSTI]

    Golden, Kenneth M.

    Arctic melt ponds and bifurcations in the climate system I. Sudakova,, S. A. Vakulenkob,c, K. M Abstract Understanding how sea ice melts is critical to climate projections. In the Arctic, melt ponds, by incorporating geometric information about melt pond evolution. This study is based on a bifurcation analysis

  11. "Just to orient us," Dr. Eric Steig be-gan, "Arctic means bear. It is the place

    E-Print Network [OSTI]

    Hart, Gus

    packed the auditorium to capacity to hear Steig discuss his re- search on climate change and Steig, raising waves across the scien- tific community. He is the director of the Quaternary Research Center is ocean and the other is land. The Arctic is covered in sea ice." Data measuring levels of Arctic sea ice

  12. Stochastic dynamics of Arctic sea ice Part II: Multiplicative noise

    E-Print Network [OSTI]

    Moon, Woosok

    2015-01-01

    We analyze the numerical solutions of a stochastic Arctic sea ice model with multiplicative noise over a wide range of external heat-fluxes, $\\Delta F_0$, which correspond to greenhouse gas forcing. When the noise is multiplicative, the noise-magnitude depends on the state-variable, and this will influence the statistical moments in a manner that differs from the additive case, which we analyzed in Part I of this study. The state variable describing the deterministic backbone of our model is the energy, $E(t)$, contained in the ice or the ocean and for a thorough comparison and contrast we choose the simplest form of multiplicative noise $\\sigma E(t) \\xi(t)$, where $\\sigma$ is the noise amplitude and $\\xi(t)$ is the noise process. The case of constant additive noise (CA) we write as $\\sigma\\overline{E_S}\\xi(t)$, in which $\\overline{E_S}$ is the seasonally averaged value of the periodic deterministic steady-state solution $E_S(t)$, or the deterministic seasonal cycle. We then treat the case of seasonally-varyi...

  13. Weakening of the Stratospheric Polar Vortex by Arctic Sea-Ice Loss

    SciTech Connect (OSTI)

    Kim, Baek-Min; Son, Seok-Woo; Min, Seung-Ki; Jeong, Jee-Hoon; Kim, Seong-Joong; Zhang, Xiangdong; Shim, Taehyoun; Yoon, Jin-Ho

    2014-09-02

    Successive cold winters of severely low temperatures in recent years have had critical social and economic impacts on the mid-latitude continents in the Northern Hemisphere. Although these cold winters are thought to be partly driven by dramatic losses of Arctic sea ice, the mechanism that links sea ice loss to cold winters remains a subject of debate. Here, by conducting observational analyses and model experiments, we show how Arctic sea ice loss and cold winters in extra-polar regions are dynamically connected through the polar stratosphere. We find that decreased sea ice cover during early winter months (November-December), especially over the Barents-Kara seas, enhance the upward propagation of planetary-scale waves with wavenumbers of 1 and 2, subsequently weakening the stratospheric polar vortex in mid-winter (January- February). The weakened polar vortex preferentially induces a negative phase of Arctic Oscillation at the surface, resulting in low temperatures in mid-latitudes.

  14. A multi-model assessment of pollution transport to the Arctic

    SciTech Connect (OSTI)

    Shindell, D T; Chin, M; Dentener, F; Doherty, R M; Faluvegi, G; Fiore, A M; Hess, P; Koch, D M; MacKenzie, I A; Sanderson, M G; Schultz, M G; Schulz, M; Stevenson, D S; Teich, H; Textor, C; Wild, O; Bergmann, D J; Bey, I; Bian, H; Cuvelier, C; Duncan, B N; Folberth, G; Horowitz, L W; Jonson, J; Kaminski, J W; Marmer, E; Park, R; Pringle, K J; Schroeder, S; Szopa, S; Takemura, T; Zeng, G; Keating, T J; Zuber, A

    2008-03-13

    We examine the response of Arctic gas and aerosol concentrations to perturbations in pollutant emissions from Europe, East and South Asia, and North America using results from a coordinated model intercomparison. These sensitivities to regional emissions (mixing ratio change per unit emission) vary widely across models and species. Intermodel differences are systematic, however, so that the relative importance of different regions is robust. North America contributes the most to Arctic ozone pollution. For aerosols and CO, European emissions dominate at the Arctic surface but East Asian emissions become progressively more important with altitude, and are dominant in the upper troposphere. Sensitivities show strong seasonality: surface sensitivities typically maximize during boreal winter for European and during spring for East Asian and North American emissions. Mid-tropospheric sensitivities, however, nearly always maximize during spring or summer for all regions. Deposition of black carbon (BC) onto Greenland is most sensitive to North American emissions. North America and Europe each contribute {approx}40% of total BC deposition to Greenland, with {approx}20% from East Asia. Elsewhere in the Arctic, both sensitivity and total BC deposition are dominated by European emissions. Model diversity for aerosols is especially large, resulting primarily from differences in aerosol physical and chemical processing (including removal). Comparison of modeled aerosol concentrations with observations indicates problems in the models, and perhaps, interpretation of the measurements. For gas phase pollutants such as CO and O{sub 3}, which are relatively well-simulated, the processes contributing most to uncertainties depend on the source region and altitude examined. Uncertainties in the Arctic surface CO response to emissions perturbations are dominated by emissions for East Asian sources, while uncertainties in transport, emissions, and oxidation are comparable for European and North American sources. At higher levels, model-to-model variations in transport and oxidation are most important. Differences in photochemistry appear to play the largest role in the intermodel variations in Arctic ozone sensitivity, though transport also contributes substantially in the mid-troposphere.

  15. COLLABORATIVE RESEARCH: TOWARDS ADVANCED UNDERSTANDING AND PREDICTIVE CAPABILITY OF CLIMATE CHANGE IN THE ARCTIC USING A HIGH-RESOLUTION REGIONAL ARCTIC CLIMATE SYSTEM MODEL

    SciTech Connect (OSTI)

    Gutowski, William J.

    2013-02-07

    The motivation for this project was to advance the science of climate change and prediction in the Arctic region. Its primary goals were to (i) develop a state-of-the-art Regional Arctic Climate system Model (RACM) including high-resolution atmosphere, land, ocean, sea ice and land hydrology components and (ii) to perform extended numerical experiments using high performance computers to minimize uncertainties and fundamentally improve current predictions of climate change in the northern polar regions. These goals were realized first through evaluation studies of climate system components via one-way coupling experiments. Simulations were then used to examine the effects of advancements in climate component systems on their representation of main physics, time-mean fields and to understand variability signals at scales over many years. As such this research directly addressed some of the major science objectives of the BER Climate Change Research Division (CCRD) regarding the advancement of long-term climate prediction.

  16. Collaborative Research: Towards Advanced Understanding and Predictive Capability of Climate Change in the Arctic Using a High-Resolution Regional Arctic Climate Model

    SciTech Connect (OSTI)

    Cassano, John

    2013-06-30

    The primary research task completed for this project was the development of the Regional Arctic Climate Model (RACM). This involved coupling existing atmosphere, ocean, sea ice, and land models using the National Center for Atmospheric Research (NCAR) Community Climate System Model (CCSM) coupler (CPL7). RACM is based on the Weather Research and Forecasting (WRF) atmospheric model, the Parallel Ocean Program (POP) ocean model, the CICE sea ice model, and the Variable Infiltration Capacity (VIC) land model. A secondary research task for this project was testing and evaluation of WRF for climate-scale simulations on the large pan-Arctic model domain used in RACM. This involved identification of a preferred set of model physical parameterizations for use in our coupled RACM simulations and documenting any atmospheric biases present in RACM.

  17. Clouds at Arctic Atmospheric Observatories. Part I: Occurrence and Macrophysical Properties

    E-Print Network [OSTI]

    Shupe, Matthew

    distributions, temperature, mi- crophysical properties, thickness, and phase composition. Arctic cloud to derive estimates of cloud occurrence fraction, vertical distribution, persistence in time, diurnal cycle seasons for which the sun is above the horizon for at least part of the day. 1. Introduction Clouds play

  18. 2006 Nature Publishing Group Arctic hydrology during global warming at the

    E-Print Network [OSTI]

    © 2006 Nature Publishing Group Arctic hydrology during global warming at the Palaeocene The Palaeocene/Eocene thermal maximum represents a period of rapid, extreme global warming ,55 million years ago global warming6 . The terrestrial-plant carbon isotope excursion (about 24.5 to 26 per mil

  19. Towards a more saline North Atlantic and a fresher Arctic under global warming

    E-Print Network [OSTI]

    Drange, Helge

    Towards a more saline North Atlantic and a fresher Arctic under global warming I. Bethke,1,2,3 T global warming, Geophys. Res. Lett., 33, L21712, doi:10.1029/ 2006GL027264. 1. Introduction [2.g., Cubasch et al., 2001; Ra¨isa¨nen, 2002]. At the high northern latitudes, a combination of warming

  20. Does Growth Rate Determine the Rate of Metabolism in Shorebird Chicks Living in the Arctic?

    E-Print Network [OSTI]

    Williams, Jos. B.

    primarily of greater metabolic inten- sities of heat-generating tissues. The maximum temperature gradient500 Does Growth Rate Determine the Rate of Metabolism in Shorebird Chicks Living in the Arctic/22/2007; Electronically Published 7/13/2007 ABSTRACT We measured resting and peak metabolic rates (RMR and PMR

  1. Short-lived pollutants in the Arctic: their climate impact and possible mitigation strategies

    SciTech Connect (OSTI)

    Menon, Surabi; Quinn, P.K.; Bates, T.S.; Baum, E.; Doubleday, N.; Fiore, A.M.; Flanner, M.; Fridlind, A.; Garrett, T.J.; Koch, D.; Menon, S.; Shindell, D.; Stohl, A.; Warren, S.G.

    2007-09-24

    Several short-lived pollutants known to impact Arctic climate may be contributing to the accelerated rates of warming observed in this region relative to the global annually averaged temperature increase. Here, we present a summary of the short-lived pollutants that impact Arctic climate including methane, tropospheric ozone, and tropospheric aerosols. For each pollutant, we provide a description of the major sources and the mechanism of forcing. We also provide the first seasonally averaged forcing and corresponding temperature response estimates focused specifically on the Arctic. The calculations indicate that the forcings due to black carbon, methane, and tropospheric ozone lead to a positive surface temperature response indicating the need to reduce emissions of these species within and outside the Arctic. Additional aerosol species may also lead to surface warming if the aerosol is coincident with thin, low lying clouds. We suggest strategies for reducing the warming based on current knowledge and discuss directions for future research to address the large remaining uncertainties.

  2. Megatides in the Arctic Ocean under glacial conditions Stephen D. Griffiths,1

    E-Print Network [OSTI]

    Peltier, W. Richard

    Megatides in the Arctic Ocean under glacial conditions Stephen D. Griffiths,1 and W. R. Peltier1's climate and ocean circulation. Citation: Griffiths, S. D., and W. R. Peltier (2008), Megatides occurred approx- imately 26,000 years ago, since the bathymetric changes are now well constrained [Peltier

  3. Atlantic meridional overturning and climate response to Arctic Ocean W. R. Peltier,1

    E-Print Network [OSTI]

    Peltier, W. Richard

    Atlantic meridional overturning and climate response to Arctic Ocean freshening W. R. Peltier,1 G to the response to North Atlantic freshening. Citation: Peltier, W. R., G. Vettoretti, and M. Stastna (2006 of the Atlantic by Heinrich Event 1 [Peltier, 2005]. Simi- larly, the onset of the Younger Dryas (Y-D) cold

  4. Response of the Greenland-Scotland overflow to changing deep water supply from the Arctic Mediterranean

    E-Print Network [OSTI]

    Response of the Greenland-Scotland overflow to changing deep water supply from the Arctic to changes in the available volume of deep and intermediate waters in the Nordic Seas. Hydraulic control sensitive to changes in the deep water supply than that of the Faeroe-Bank Channel, but no sudden breakdown

  5. THE INFLUENCE OF MIXED-PHASE CLOUDS ON SURFACE SHORTWAVE IRRADIANCE DURING THE ARCTIC SPRING

    E-Print Network [OSTI]

    THE INFLUENCE OF MIXED-PHASE CLOUDS ON SURFACE SHORTWAVE IRRADIANCE DURING THE ARCTIC SPRING Dan-phase stratiform clouds on the surface shortwave irradiance is examined using spectral irradiance measurements from.) spectroradiometer measured downwelling spectral irradiance in the interval 350­2200 nm, in one-minute averages

  6. The influence of mixedphase clouds on surface shortwave irradiance during the Arctic spring

    E-Print Network [OSTI]

    The influence of mixedphase clouds on surface shortwave irradiance during the Arctic spring Dan irradiance is examined using unique spectral shortwave irradiance measurements made during the Indirect spectral irradiance from 350 to 2200 nm in oneminute averages throughout April­May 2008 from the ARM

  7. Autonomous buoy for seismic reflection data acquisition in the inaccessible parts of the Arctic Ocean

    E-Print Network [OSTI]

    Kristoffersen, Yngve

    Autonomous buoy for seismic reflection data acquisition in the inaccessible parts of the Arctic Instrumentation, Bergen, Norway An autonomous buoy which collects seismic reflection data and transmits to shore of the seismic buoy (thick red, green and black lines). - we have successfully developed an autonomous buoy

  8. 2006 Nature Publishing Group Episodic fresh surface waters in the Eocene Arctic

    E-Print Network [OSTI]

    Jakobsson, Martin

    with a local sea surface temperature rise from ,10 8C to 13 8C, pointing to simultaneous increases in salt. The recent Integrated Ocean Drilling Program (IODP) Expedition 302 (or Arctic Coring Expedition, ACEX tolerant species have experimentally been pre-conditioned by gradual increase of salt concentrations

  9. Export of nutrients from the Arctic Ocean Sinhu Torres-Valds,1

    E-Print Network [OSTI]

    Naveira Garabato, Alberto

    Export of nutrients from the Arctic Ocean Sinhué Torres-Valdés,1 Takamasa Tsubouchi,2 Sheldon Bacon Strait, the Barents Sea Opening (BSO), and Bering Strait. We found that the major exports of all three budgets show that statistically robust net silicate and phosphate exports exist, while the net nitrate

  10. Proceedings of the ASME 28th International Conference on Ocean, Offshore and Arctic Engineering

    E-Print Network [OSTI]

    Frey, Pascal

    Proceedings of the ASME 28th International Conference on Ocean, Offshore and Arctic Engineering-mail: frederic.alauzet@inria.fr ABSTRACT Engineering offshore problems require a continuous progress of numerical schemes. How- ever, this strategy requires advanced meshing techniques. As engineering offshore

  11. Proceedings of OMAE2008: The 27th International Conference on Offshore Mechanics & Arctic Engineering

    E-Print Network [OSTI]

    Proceedings of OMAE2008: The 27th International Conference on Offshore Mechanics & Arctic Taggart BP America Production Mike Campbell 2H Offshore Inc. ABSTRACT In an effort to more effectively instrumented several of them on a number of mobile offshore drilling units (MODUs) and offshore production

  12. A continuum model of melt pond evolution on Arctic sea ice Daniela Flocco1

    E-Print Network [OSTI]

    Feltham, Daniel

    A continuum model of melt pond evolution on Arctic sea ice Daniela Flocco1 and Daniel L. Feltham1 to generate meltwater that accumulates in ponds. The melt ponds reduce the albedo of the sea ice cover during), which simulates the formation and evolution of the melt pond cover. In order to be compatible

  13. Simulated heat storage in a perennially ice-covered high Arctic lake: Sensitivity to climate change

    E-Print Network [OSTI]

    Vincent, Warwick F.

    . In contrast, the perennially ice-covered lakes found at high latitudes can store heat in excess of the annualSimulated heat storage in a perennially ice-covered high Arctic lake: Sensitivity to climate change conductivity and temperature profiles. They are salinity stratified and have deep thermal maxima that persist

  14. Report of the workshop on Arctic oil and gas recovery. [Offshore

    SciTech Connect (OSTI)

    Sackinger, W. M.

    1980-09-01

    Mission of the workshop was to identify research priorities for the technology related to Arctic offshore oil and gas production. Two working groups were formed on ice-related subjects and soil-related subjects. Instrumentation needed to accomplish some of the research objectives was also discussed. Results of a research priority allocation survey are summarized. (DLC)

  15. For publication in the Journal of O#shore Mechanics and Arctic Engineering

    E-Print Network [OSTI]

    Sweetman, Bert

    For publication in the Journal of O#shore Mechanics and Arctic Engineering May 2000 STOCHASTIC'' (NTF) method. The basic goal of this method is to require the use of a generally expensive, nonlinear trend toward increasingly detailed, numerically complex analysis methods (e.g.,[10--12, 15

  16. For publication in the Journal of Offshore Mechanics and Arctic Engineering

    E-Print Network [OSTI]

    Sweetman, Bert

    For publication in the Journal of Offshore Mechanics and Arctic Engineering May 2000 STOCHASTIC transfer function" (NTF) method. The basic goal of this method is to require the use of a generally trend toward increasingly detailed, numerically complex analysis methods (e.g.,[10­12, 15

  17. Proceedings of OMAE98 17th Conference on Offshore Mechanics and Arctic Engineering

    E-Print Network [OSTI]

    Sweetman, Bert

    Proceedings of OMAE98 17th Conference on Offshore Mechanics and Arctic Engineering July 5­7, Lisbon transfer function'' (NTF) method. The basic goal of this method is to require the use of a gener­ ally, there is an on­ going trend toward increasingly detailed, numerically com­ plex analysis methods (e.g., Nakos

  18. Proceedings of OMAE98 17th Conference on O shore Mechanics and Arctic Engineering

    E-Print Network [OSTI]

    Sweetman, Bert

    Proceedings of OMAE98 17th Conference on O shore Mechanics and Arctic Engineering July 5-7, Lisbon transfer function" NTF method. The basic goal of this method is to require the use of a gener- ally, there is an on- going trend toward increasingly detailed, numerically com- plex analysis methods e.g., Nakos

  19. Vegetation responses in Alaskan arctic tundra after 8 years of a summer warming and winter snow

    E-Print Network [OSTI]

    Ickert-Bond, Steffi

    by insulating vegetation from winter wind and temperature extremes, modifying winter soil temperaturesVegetation responses in Alaskan arctic tundra after 8 years of a summer warming and winter snow ) open-topped fiberglass chambers (OTCs) to study the effects of changes in winter snow cover and summer

  20. Ocean advection, Arctic-Atlantic Connections, Climate P.B.Rhines, University of Washington

    E-Print Network [OSTI]

    Ocean advection, Arctic-Atlantic Connections, Climate P.B.Rhines, University of Washington Sirpa Hakkinen, NASA Goddard SPC with David Bailey, Wei Cheng, Jerome Cuny, Trisha Sawatzky WUN Climate Track,Wintertime Storm Track,Wintertime Storm Track, Eurasian climate and weatherEurasian climate

  1. Black carbon in Arctic snow and its effect on surface albedo

    E-Print Network [OSTI]

    1 Black carbon in Arctic snow and its effect on surface albedo Stephen Warren, University wavelengths: ice is nearly transparent. Absorptive impurities: Black carbon (soot) Brown carbon (organics broadband albedo: 83% 71% (2) by addition of black carbon (BC) (20 ppb): 0.5% for r = 100 µm 1.6% for r

  2. Arctic methane sources: Isotopic evidence for atmospheric inputs R. E. Fisher,1

    E-Print Network [OSTI]

    Sheldon, Nathan D.

    Arctic methane sources: Isotopic evidence for atmospheric inputs R. E. Fisher,1 S. Sriskantharajah,1 D. Lowry,1 M. Lanoisellé,1 C. M. R. Fowler,1 R. H. James,2 O. Hermansen,3 C. Lund Myhre,3 A. Stohl,3 J. Greinert,4 P. B. R. NisbetJones,5 J. Mienert,6 and E. G. Nisbet1 Received 16 August 2011

  3. Arctic Region Evaluation of the Hydro-Thermodynamic Soil Vegetation Scheme (HTSVS)

    E-Print Network [OSTI]

    Moelders, Nicole

    Arctic Region Evaluation of the Hydro-Thermodynamic Soil Vegetation Scheme (HTSVS) Pamela Spier, University of Alaska, Fairbanks, AK Abstract This paper presents an evaluation of the Hydro. Introduction and Motivation The Hydro-Thermodynamic Soil Vegetation Scheme (HTSVS, Kramm et al. 1996, Mölders

  4. An energy-diagnostics intercomparison of coupled ice-ocean Arctic models

    E-Print Network [OSTI]

    Zhang, Jinlun

    An energy-diagnostics intercomparison of coupled ice-ocean Arctic models Petteri Uotila a,*, David Institute, Bremerhaven, Germany g Institute of Numerical Mathematics Russian Academy of Science, Moscow, potential and available potential energies, energy conversion and forcing rates are studied. The energy

  5. Cloud water contents and hydrometeor sizes during the FIRE Arctic Clouds Experiment

    E-Print Network [OSTI]

    Shupe, Matthew

    Cloud water contents and hydrometeor sizes during the FIRE Arctic Clouds Experiment Matthew D a 35-GHz cloud radar and the DOE Atmospheric Radiation Measurement Program operated a suite Clouds Experiment took place during April­July 1998, with the primary goal of investigating cloud

  6. Using Snow Fences to Augument Fresh Water Supplies in Shallow Arctic Lakes

    SciTech Connect (OSTI)

    Stuefer, Svetlana

    2013-03-31

    This project was funded by the U.S. Department of Energy, National Energy Technology Laboratory (NETL) to address environmental research questions specifically related to Alaska?s oil and gas natural resources development. The focus of this project was on the environmental issues associated with allocation of water resources for construction of ice roads and ice pads. Earlier NETL projects showed that oil and gas exploration activities in the U.S. Arctic require large amounts of water for ice road and ice pad construction. Traditionally, lakes have been the source of freshwater for this purpose. The distinctive hydrological regime of northern lakes, caused by the presence of ice cover and permafrost, exerts influence on lake water availability in winter. Lakes are covered with ice from October to June, and there is often no water recharge of lakes until snowmelt in early June. After snowmelt, water volumes in the lakes decrease throughout the summer, when water loss due to evaporation is considerably greater than water gained from rainfall. This balance switches in August, when air temperature drops, evaporation decreases, and rain (or snow) is more likely to occur. Some of the summer surface storage deficit in the active layer and surface water bodies (lakes, ponds, wetlands) is recharged during this time. However, if the surface storage deficit is not replenished (for example, precipitation in the fall is low and near?surface soils are dry), lake recharge is directly affected, and water availability for the following winter is reduced. In this study, we used snow fences to augment fresh water supplies in shallow arctic lakes despite unfavorable natural conditions. We implemented snow?control practices to enhance snowdrift accumulation (greater snow water equivalent), which led to increased meltwater production and an extended melting season that resulted in lake recharge despite low precipitation during the years of the experiment. For three years (2009, 2010, and 2011), we selected and monitored two lakes with similar hydrological regimes. Both lakes are located 30 miles south of Prudhoe Bay, Alaska, near Franklin Bluffs. One is an experimental lake, where we installed a snow fence; the other is a control lake, where the natural regime was preserved. The general approach was to compare the hydrologic response of the lake to the snowdrift during the summers of 2010 and 2011 against the ?baseline? conditions in 2009. Highlights of the project included new data on snow transport rates on the Alaska North Slope, an evaluation of the experimental lake?s hydrological response to snowdrift melt, and cost assessment of snowdrift?generated water. High snow transport rates (0.49 kg/s/m) ensured that the snowdrift reached its equilibrium profile by winter's end. Generally, natural snowpack disappeared by the beginning of June in this area. In contrast, snow in the drift lasted through early July, supplying the experimental lake with snowmelt when water in other tundra lakes was decreasing. The experimental lake retained elevated water levels during the entire open?water season. Comparison of lake water volumes during the experiment against the baseline year showed that, by the end of summer, the drift generated by the snow fence had increased lake water volume by at least 21?29%. We estimated water cost at 1.9 cents per gallon during the first year and 0.8 cents per gallon during the second year. This estimate depends on the cost of snow fence construction in remote arctic locations, which we assumed to be at $7.66 per square foot of snow fence frontal area. The snow fence technique was effective in augmenting the supply of lake water during summers 2010 and 2011 despite low rainfall during both summers. Snow fences are a simple, yet an effective, way to replenish tundra lakes with freshwater and increase water availability in winter. This research project was synergetic with the NETL project, "North Slope Decision Support System (NSDSS) for Water Resources Planning and Management." The results

  7. Fundamental differences between Arctic and Antarctic ozone depletion

    E-Print Network [OSTI]

    Solomon, Susan

    Antarctic ozone depletion is associated with enhanced chlorine from anthropogenic chlorofluorocarbons and heterogeneous chemistry under cold conditions. The deep Antarctic “hole” contrasts with the generally weaker depletions ...

  8. Paleoreconstruction of Particulate Organic Carbon Inputs to the High-Arctic Colville River Delta, Beaufort Sea, Alaska 

    E-Print Network [OSTI]

    Schreiner, Kathryn 1983-

    2013-01-09

    High Arctic permafrosted soils represent a massive sink in the global carbon cycle, accounting for twice as much carbon as what is currently stored as carbon dioxide in the atmosphere. However, with current warming trends this sink is in danger...

  9. Climatic responses in spring migration of boreal and arctic birds in relation to wintering area and taxonomy

    E-Print Network [OSTI]

    Laaksonen, Toni

    and taxonomy Kalle Rainio, Toni Laaksonen, Markus Ahola, Anssi V. Va¨ha¨talo and Esa Lehikoinen Rainio, K of boreal and arctic birds in relation to wintering area and taxonomy. Á J. Avian Biol. 37: 507Á515. Large

  10. The ocean's role in polar climate change: asymmetric Arctic and Antarctic responses to greenhouse gas and ozone forcing

    E-Print Network [OSTI]

    Marshall, John C.

    In recent decades, the Arctic has been warming and sea ice disappearing. By contrast, the Southern Ocean around Antarctica has been (mainly) cooling and sea-ice extent growing. We argue here that interhemispheric asymmetries ...

  11. Critical Mechanisms for the Formation of Extreme Arctic Sea-Ice Extent in the Summers of 2007 and 1996

    SciTech Connect (OSTI)

    Dong, Xiquan; Zib, Benjamin J.; Xi, Baike; Stanfield, Ryan; Deng, Yi; Zhang, Xiangdong; Lin, B.; Long, Charles N.

    2014-07-29

    A warming Arctic climate is undergoing significant e 21 nvironmental change, most evidenced by the reduction of Arctic sea-ice extent during the summer. In this study, we examine two extreme anomalies of September sea-ice extent in 2007 and 1996, and investigate the impacts of cloud fraction (CF), atmospheric precipitable water vapor (PWV), downwelling longwave flux (DLF), surface air temperature (SAT), pressure and winds on the sea-ice variation in 2007 and 1996 using both satellite-derived sea-ice products and MERRA reanalysis. The area of the Laptev, East Siberian and West Chukchi seas (70-90oN, 90-180oE) has experienced the largest variation in sea-ice extent from year-to-year and defined here as the Area Of Focus (AOF). The record low September sea-ice extent in 2007 was associated with positive anomalies 30 of CF, PWV, DLF, and SAT over the AOF. Persistent anti-cyclone positioned over the Beaufort Sea coupled with low pressure over Eurasia induced easterly zonal and southerly meridional winds. In contrast, negative CF, PWV, DLF and SAT anomalies, as well as opposite wind patterns to those in 2007, characterized the 1996 high September sea-ice extent. Through this study, we hypothesize the following positive feedbacks of clouds, water vapor, radiation and atmospheric variables on the sea-ice retreat during the summer 2007. The record low sea-ice extent during the summer 2007 is initially triggered by the atmospheric circulation anomaly. The southerly winds across the Chukchi and East Siberian seas transport warm, moist air from the north Pacific, which is not only enhancing sea-ice melt across the AOF, but also increasing clouds. The positive cloud feedback results in higher SAT and more sea-ice melt. Therefore, 40 more water vapor could be evaporated from open seas and higher SAT to form more clouds, which will enhance positive cloud feedback. This enhanced positive cloud feedback will then further increase SAT and accelerate the sea-ice retreat during the summer 2007.

  12. Corrosion inhibitor selection for arctic and subsea high-velocity flowlines

    SciTech Connect (OSTI)

    Dougherty, J.A.

    2000-03-01

    Qualifying corrosion inhibitors for use in high-velocity multiphase flowlines in arctic or subsea environments is discussed. The criteria include high-velocity flow loop corrosion tests, pumpability through 0.125-in. (0.318-cm) capillary at low temperatures, compatibility with nylon 11, emulsion tendency testing, and partitioning characteristics. Laboratory and field data show the importance of using these criteria for inhibitor selection.

  13. Criteria for the selection of corrosion inhibitors for Arctic and subsea high velocity flowlines

    SciTech Connect (OSTI)

    Dougherty, J.A.; Ahn, Y.S.

    1999-11-01

    Qualifying corrosion inhibitors for use in high velocity multiphase flowlines in arctic or subsea environments is discussed. The tests include high velocity flow loop corrosion tests, pumpability through 0.125 (0.318 cm) inch capillary at low temperatures, compatibility with Nylon 11, emulsion tendency testing, and partitioning characteristics. Laboratory and field data show the importance for using the above criteria for inhibitor selection.

  14. INFLUENCE OF ARCTIC CLOUD THERMODYNAMIC PHASE ON SURFACE SHORTWAVE FLUX

    E-Print Network [OSTI]

    -phase" category, can affect the surface energy balance at the same order of magnitude as greenhouse gas increases Science Associates, LLC under Contract No. DE-AC02- 98CH10886 with the U.S. Department of Energy a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form

  15. Transport of anthropogenic and biomass burning aerosols from Europe to the Arctic during spring 2008

    SciTech Connect (OSTI)

    Marelle, L.; Raut, Jean-Christophe; Thomas, J. L.; Law, K. S.; Quennehen, Boris; Ancellet, G.; Pelon, J.; Schwarzenboeck, A.; Fast, Jerome D.

    2015-04-10

    During the POLARCAT-France airborne campaign in April 2008, pollution originating from anthropogenic and biomass burning emissions was measured in the European Arctic. We compare these aircraft measurements with simulations using the WRF-Chem model to investigate model representation of aerosols transported from Europe to the Arctic. Modeled PM2.5 is evaluated using European Monitoring and Evaluation Programme (EMEP) measurements in source regions and POLARCAT aircraft measurements in the Scandinavian Arctic. Total PM2.5 agrees well with the measurements, although the model overestimates nitrate and underestimates organic carbon in source regions. Using WRF-Chem in combination with the Lagrangian model FLEXPART-WRF, we find that during the campaign the research aircraft sampled two different types of European plumes: mixed anthropogenic and fire plumes from eastern Europe and Russia transported below 2 km, and anthropogenic plumes from central Europe uplifted by warm conveyor belt circulations to 5–6 km. Both modeled plume types had undergone significant wet scavenging (> 50% PM10) during transport. Modeled aerosol vertical distributions and optical properties below the aircraft are evaluated in the Arctic using airborne lidar measurements. Model results show that the pollution event transported aerosols into the Arctic (> 66.6° N) for a 4-day period. During this 4-day period, biomass burning emissions have the strongest influence on concentrations between 2.5 and 3 km altitudes, while European anthropogenic emissions influence aerosols at both lower (~ 1.5 km) and higher altitudes (~ 4.5 km). As a proportion of PM2.5, modeled black carbon and SO4= concentrations are more enhanced near the surface in anthropogenic plumes. The European plumes sampled during the POLARCAT-France campaign were transported over the region of springtime snow cover in northern Scandinavia, where they had a significant local atmospheric warming effect. We find that, during this transport event, the average modeled top-of-atmosphere (TOA) shortwave direct and semi-direct radiative effect (DSRE) north of 60° N over snow and ice-covered surfaces reaches +0.58 W m?2, peaking at +3.3 W m?2 at noon over Scandinavia and Finland.

  16. Transport of anthropogenic and biomass burning aerosols from Europe to the Arctic during spring 2008

    SciTech Connect (OSTI)

    Marelle, L.; Raut, Jean-Christophe; Thomas, J. L.; Law, K. S.; Quennehen, Boris; Ancellet, G.; Pelon, J.; Schwarzenboeck, A.; Fast, Jerome D.

    2015-01-01

    During the POLARCAT-France airborne campaign in April 2008, pollution originating from anthropogenic and biomass burning emissions was measured in the European Arctic. We compare these aircraft measurements with simulations using the WRF-Chem model to investigate model representation of aerosols transported from Europe to the Arctic. Modeled PM2.5 is evaluated using European Monitoring and Evaluation Programme (EMEP) measurements in source regions and POLARCAT aircraft measurements in the Scandinavian Arctic. Total PM2.5 agrees well with the measurements, although the model overestimates nitrate and underestimates organic carbon in source regions. Using WRF-Chem in combination with the Lagrangian model FLEXPART-WRF, we find that during the campaign the research aircraft sampled two different types of European plumes: mixed anthropogenic and fire plumes from eastern Europe and Russia transported below 2 km, and anthropogenic plumes from central Europe uplifted by warm conveyor belt circulations to 5–6 km. Both modeled plume types had undergone significant wet scavenging (> 50% PM10) during transport. Modeled aerosol vertical distributions and optical properties below the aircraft are evaluated in the Arctic using airborne lidar measurements. Model results show that the pollution event transported aerosols into the Arctic (> 66.6° N) for a 4-day period. During this 4-day period, biomass burning emissions have the strongest influence on concentrations between 2.5 and 3 km altitudes, while European anthropogenic emissions influence aerosols at both lower (~ 1.5 km) and higher altitudes (~ 4.5 km). As a proportion of PM2.5, modeled black carbon and SO4= concentrations are more enhanced near the surface in anthropogenic plumes. The European plumes sampled during the POLARCAT-France campaign were transported over the region of springtime snow cover in northern Scandinavia, where they had a significant local atmospheric warming effect. We find that, during this transport event, the average modeled top-of-atmosphere (TOA) shortwave direct and semi-direct radiative effect (DSRE) north of 60° N over snow and ice-covered surfaces reaches +0.58 W m?2, peaking at +3.3 W m?2 at noon over Scandinavia and Finland.

  17. Transport of anthropogenic and biomass burning aerosols from Europe to the Arctic during spring 2008

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

    Marelle, L.; Raut, Jean-Christophe; Thomas, J. L.; Law, K. S.; Quennehen, Boris; Ancellet, G.; Pelon, J.; Schwarzenboeck, A.; Fast, Jerome D.

    2015-04-10

    During the POLARCAT-France airborne campaign in April 2008, pollution originating from anthropogenic and biomass burning emissions was measured in the European Arctic. We compare these aircraft measurements with simulations using the WRF-Chem model to investigate model representation of aerosols transported from Europe to the Arctic. Modeled PM2.5 is evaluated using European Monitoring and Evaluation Programme (EMEP) measurements in source regions and POLARCAT aircraft measurements in the Scandinavian Arctic. Total PM2.5 agrees well with the measurements, although the model overestimates nitrate and underestimates organic carbon in source regions. Using WRF-Chem in combination with the Lagrangian model FLEXPART-WRF, we find that duringmore »the campaign the research aircraft sampled two different types of European plumes: mixed anthropogenic and fire plumes from eastern Europe and Russia transported below 2 km, and anthropogenic plumes from central Europe uplifted by warm conveyor belt circulations to 5–6 km. Both modeled plume types had undergone significant wet scavenging (> 50% PM10) during transport. Modeled aerosol vertical distributions and optical properties below the aircraft are evaluated in the Arctic using airborne lidar measurements. Model results show that the pollution event transported aerosols into the Arctic (> 66.6° N) for a 4-day period. During this 4-day period, biomass burning emissions have the strongest influence on concentrations between 2.5 and 3 km altitudes, while European anthropogenic emissions influence aerosols at both lower (~ 1.5 km) and higher altitudes (~ 4.5 km). As a proportion of PM2.5, modeled black carbon and SO4= concentrations are more enhanced near the surface in anthropogenic plumes. The European plumes sampled during the POLARCAT-France campaign were transported over the region of springtime snow cover in northern Scandinavia, where they had a significant local atmospheric warming effect. We find that, during this transport event, the average modeled top-of-atmosphere (TOA) shortwave direct and semi-direct radiative effect (DSRE) north of 60° N over snow and ice-covered surfaces reaches +0.58 W m?2, peaking at +3.3 W m?2 at noon over Scandinavia and Finland.« less

  18. Arctic Sea Ice Hits Record Low--Extreme Weather to Come? Global warming to blame for highest observed decline, scientists say.

    E-Print Network [OSTI]

    South Bohemia, University of

    at the U.S. National Snow and Ice Data Center said the rate of Arctic sea ice decline is now the highest." Climate models used by the Intergovernmental Panel on Climate Change (IPCC) also predict that Arctic at a historic rate, scientists say. In fact, a recent analysis of satellite data "utterly obliterates

  19. Parameterizing correlations between hydrometeor species in mixed-phase Arctic clouds

    SciTech Connect (OSTI)

    Larson, Vincent E.; Nielsen, Brandon J.; Fan, Jiwen; Ovchinnikov, Mikhail

    2011-08-16

    Mixed-phase Arctic clouds, like other clouds, contain small-scale variability in hydrometeor fields, such as cloud water or snow mixing ratio. This variability may be worth parameterizing in coarse-resolution numerical models. In particular, for modeling processes such as accretion and aggregation, it would be useful to parameterize subgrid correlations among hydrometeor species. However, one difficulty is that there exist many hydrometeor species and many microphysical processes, leading to complexity and computational expense.Existing lower and upper bounds (inequalities) on linear correlation coefficients provide useful guidance, but these bounds are too loose to serve directly as a method to predict subgrid correlations. Therefore, this paper proposes an alternative method that is based on a blend of theory and empiricism. The method begins with the spherical parameterization framework of Pinheiro and Bates (1996), which expresses the correlation matrix in terms of its Cholesky factorization. The values of the elements of the Cholesky matrix are parameterized here using a cosine row-wise formula that is inspired by the aforementioned bounds on correlations. The method has three advantages: 1) the computational expense is tolerable; 2) the correlations are, by construction, guaranteed to be consistent with each other; and 3) the methodology is fairly general and hence may be applicable to other problems. The method is tested non-interactively using simulations of three Arctic mixed-phase cloud cases from two different field experiments: the Indirect and Semi-Direct Aerosol Campaign (ISDAC) and the Mixed-Phase Arctic Cloud Experiment (M-PACE). Benchmark simulations are performed using a large-eddy simulation (LES) model that includes a bin microphysical scheme. The correlations estimated by the new method satisfactorily approximate the correlations produced by the LES.

  20. SOLID RADIOACTIVE WASTE STORAGE TECHNOLOGIES: PERFORMANCE OF A POLYMER SEALANT COATING IN AN ARCTIC MARINE ENVIRONMENT

    SciTech Connect (OSTI)

    COWGILL,M.G.; MOSKOWITZ,P.D.; CHERNAENKO,L.M.; NAZARIAN,A.; GRIFFITH,A.; DIASHEV,A.; ENGOY,T.

    2000-06-14

    This first project, under the auspices of the Arctic Military Environmental Cooperation (AMEC) forum, Project 1.4-1 Solid Radioactive Waste Storage Technologies, successfully demonstrated the feasibility of using a polymer-based coating to seal concrete and steel surfaces from permanent radioactive contamination in an Arctic marine environment. A mobile, self-sufficient spraying device, was developed to specifications provided by the Russian Ministry of Defence Northern Navy and was deployed at the RTP Atomflot site, Murmansk, Russia. Demonstration coatings of Polibrid 705 were applied to concrete surfaces exposed to conditions ranging from indoor pedestrian usage to heavy vehicle passage and container handling in a loading bay. A large steel container was also coated with the polymer, filled with solid radwaste, sealed, and left out of doors and exposed to the full 12 month Arctic weather cycle. The field tests were accompanied by a series of laboratory qualification tests carried out at the research laboratory of ICC Nuclide in St. Petersburg. During the 12-month field tests, the sealant coating showed little sign of degradation except for a few chips and gouge marks on the loading bay surface that were readily repaired. Contamination resulting from radwaste handling was easily removed and the surface was not degraded by contact with the decontamination agents. In the laboratory testing, Polibrid 705 met all the Russian qualification requirements with the exception of flammability. In this last instance, it was decided to restrict application of the coating to land-based facilities. The Russian technical experts from the Ministry of Defence quickly familiarized themselves with the equipment and were able to identify several areas of potential improvement as deployment of the equipment progressed. The prime among these was the desirability of extending the range of the equipment through enlarged gasoline tanks (to permit extended operational times) and longer material supply hoses (to increase flexibility of operation in confined spaces). Modifications designed to address these issues will be implemented as appropriate.

  1. Microphysical Properties of Single and Mixed-Phase Arctic Clouds Derived from AERI Observations

    SciTech Connect (OSTI)

    Turner, David D.

    2003-06-01

    A novel new approach to retrieve cloud microphysical properties from mixed-phase clouds is presented. This algorithm retrieves cloud optical depth, ice fraction, and the effective size of the water and ice particles from ground-based, high-resolution infrared radiance observations. The theoretical basis is that the absorption coefficient of ice is stronger than that of liquid water from 10-13 mm, whereas liquid water is more absorbing than ice from 16-25 um. However, due to strong absorption in the rotational water vapor absorption band, the 16-25 um spectral region becomes opaque for significant water vapor burdens (i.e., for precipitable water vapor amounts over approximately 1 cm). The Arctic is characterized by its dry and cold atmosphere, as well as a preponderance of mixed-phase clouds, and thus this approach is applicable to Arctic clouds. Since this approach uses infrared observations, cloud properties are retrieved at night and during the long polar wintertime period. The analysis of the cloud properties retrieved during a 7 month period during the Surface Heat Budget of the Arctic (SHEBA) experiment demonstrates many interesting features. These results show a dependence of the optical depth on cloud phase, differences in the mode radius of the water droplets in liquid-only and mid-phase clouds, a lack of temperature dependence in the ice fraction for temperatures above 240 K, seasonal trends in the optical depth with the clouds being thinner in winter and becoming more optically thick in the late spring, and a seasonal trend in the effective size of the water droplets in liquid-only and mixed-phase clouds that is most likely related to aerosol concentration.

  2. DOE/SC-ARM-10-034 The Arctic Lower Troposphere Observed

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation Current HAB Packet HanfordDOE ProjectREMOTE-HANDLED TRU764 The Arctic Lower

  3. Reconstruction of a high-resolution late holocene arctic paleoclimate record from Colville River delta sediments.

    SciTech Connect (OSTI)

    Schreiner, Kathryn Melissa; Lowry, Thomas Stephen

    2013-10-01

    This work was partially supported by the Sandia National Laboratories,Laboratory Directed Research and Development' (LDRD) fellowship program in conjunction with Texas A&M University (TAMU). The research described herein is the work of Kathryn M. Schreiner (Katie') and her advisor, Thomas S. Bianchi and represents a concise description of Katie's dissertation that was submitted to the TAMU Office of Graduate Studies in May 2013 in partial fulfillment of her doctorate of philosophy degree. High Arctic permafrost soils contain a massive amount of organic carbon, accounting for twice as much carbon as what is currently stored as carbon dioxide in the atmosphere. However, with current warming trends this sink is in danger of thawing and potentially releasing large amounts of carbon as both carbon dioxide and methane into the atmosphere. It is difficult to make predictions about the future of this sink without knowing how it has reacted to past temperature and climate changes. This project investigated long term, fine scale particulate organic carbon (POC) delivery by the high-Arctic Colville River into Simpson's Lagoon in the near-shore Beaufort Sea. Modern POC was determined to be a mixture of three sources (riverine soils, coastal erosion, and marine). Downcore POC measurements were performed in a core close to the Colville River output and a core close to intense coastal erosion. Inputs of the three major sources were found to vary throughout the last two millennia, and in the Colville River core covary significantly with Alaskan temperature reconstructions.

  4. A transitioning Arctic surface energy budget: the impacts of solar zenith angle, surface albedo and cloud radiative forcing

    E-Print Network [OSTI]

    Shupe, Matthew

    dropped from near zero to -7°C. Subsequently mean energy budget residuals remained small and near zero. Energy budget transitions were dominated by the net radiative fluxes, largely controlledA transitioning Arctic surface energy budget: the impacts of solar zenith angle, surface albedo

  5. The Impact of Global Warming on the Carbon Cycle of Arctic Permafrost: An Experimental and Field Based Study

    SciTech Connect (OSTI)

    Onstott, Tullis C; Pffifner, Susan M; Chourey, Karuna

    2014-11-07

    Our results to date indicate that CO2 and CH4 fluxes from organic poor, Arctic cryosols on Axel Heiberg Island are net CH4 sinks and CO2 emitters in contrast to organic-rich peat deposits at sub-Arctic latitudes. This is based upon field observations and a 1.5 year long thawing experiment performed upon one meter long intact cores. The results of the core thawing experiments are in good agreement with field measurements. Metagenomic, metatranscriptomic and metaproteomic analyses indicate that high affinity aerobic methanotrophs belong to the uncultivated USCalpha are present in <1% abundance in these cryosols are are active in the field during the summer and in the core thawing experiments. The methanotrophs are 100 times more abundant than the methanogens. As a result mineral cryosols, which comprise 87% of Arctic tundra, are net methane sinks. Their presence and activity may account for the discrepancies observed between the atmospheric methane concentrations observed in the Arctic predicted by climate models and the observed seasonal fluctuations and decadal trends. This has not been done yet.

  6. Extreme seasonality of litter breakdown in an arctic spring-fed stream is driven by shredder phenology, not

    E-Print Network [OSTI]

    Benstead, Jon

    regimes. We used an alternative approach to investigate the importance of temperature by quantifying seasonal patterns in litter breakdown in an arctic spring-fed stream (Ivishak Spring, North Slope, Alaska) that experiences extreme seasonality in light availability and energy inputs while fluctuations in water

  7. 20th-Century Industrial Black Carbon Emissions Altered Arctic Climate Forcing Joseph R. McConnell,

    E-Print Network [OSTI]

    Saltzman, Eric

    20th-Century Industrial Black Carbon Emissions Altered Arctic Climate Forcing Joseph R. Mc since 1788 as a result of boreal forest fires and industrial activities. Beginning about 1850, industrial emissions resulted in a seven-fold increase in ice core BC concentrations with most change

  8. Using the MicroASAR on the NASA SIERRA UAS in the Characterization of Arctic Sea Ice Experiment

    E-Print Network [OSTI]

    Long, David G.

    Using the MicroASAR on the NASA SIERRA UAS in the Characterization of Arctic Sea Ice Experiment: zaugg@mers.byu.edu ARTEMIS, Inc. - 36 Central Ave Hauppauge, NY 11788 - Email: matt@artemisinc.net NASA Ames Research Center - MS 245-4 Moffett Field, CA 94035 - Email: matthew.fladeland@nasa.gov §University

  9. Proceedings of the 28th International Conference on Ocean, Offshore and Arctic Engineering May 31 -June 5 , 2009, Honolulu, Hawaii

    E-Print Network [OSTI]

    Manuel, Lance

    Proceedings of the 28th International Conference on Ocean, Offshore and Arctic Engineering OMAE2009 IN RELIABILITY STUDIES FOR OFFSHORE WIND TURBINES P. Agarwal Stress Engineering Services Houston, TX 77041, USA cases according to the IEC guidelines for offshore wind turbines, designers are required to estimate

  10. Arctic sea ice animation (Tom Agnew, Environment Canada) Lecture 12 HAS222d Intro to energy and environment 2009

    E-Print Network [OSTI]

    Arctic sea ice animation (Tom Agnew, Environment Canada) #12;Lecture 12 HAS222d Intro to energy. moisture streamers: (1 Sverdrup...106 m3/sec tranport of water carries 2.2 x 1015 watt thermal energy and environment 2009 slides on water in the atmosphere P.B. Rhines #12;Satellite image of water vapor (not cloud

  11. 1 Copyright 2014 by ASME Proceedings of the ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering

    E-Print Network [OSTI]

    and the National Renewable Energy Laboratory. In this paper, the WEC-Sim code is used to model a point absorber WEC Renewable Energy Laboratory (NREL) and Sandia National Laboratories (SNL) to develop WEC-Sim, a publicly, Offshore and Arctic Engineering OMAE2014 June 8­13, 2014, San Francisco, California USA OMAE2014

  12. Over-winter oceanographic profiles in Jones Sound, Canadian Arctic Archipelago, November 1961 -June 1962: Temperature, salinity,

    E-Print Network [OSTI]

    Townsend, David W.

    1 Over-winter oceanographic profiles in Jones Sound, Canadian Arctic Archipelago, November 1961 and silicate) were measured at five depths (2, 10, 25, 50 and 80 m) beneath the ice through the winter of 1961 the north side of the sound off Grise Fiord, Ellesmere Island, on 13 May 1962 and 12 May 1969. The over-winter

  13. Terrigenous dissolved organic matter in the Arctic Ocean and its transport to surface and deep waters of the North Atlantic

    E-Print Network [OSTI]

    Louchouarn, Patrick

    lignin phenols in polar surface waters are 7-fold to 16-fold higher than those in the Atlantic phenols provide some evidence of photochemical transformations of terrigenous DOM, but it appears the Arctic Ocean by microbial degradation is less clear and warrants further study. Physical transport

  14. Cold and dry processes in the Martian Arctic: Geomorphic observations at the Phoenix landing site and comparisons with

    E-Print Network [OSTI]

    Marchant, David R.

    Cold and dry processes in the Martian Arctic: Geomorphic observations at the Phoenix landing site-related landforms in the vicinity of the Phoenix lander, comparing the imaged features to analogous examples at the Phoenix landing site of pitted rocks, ``puzzle rocks'' undergoing in-situ breakdown, perched clasts

  15. Periodic analysis of solar activity and its link with the Arctic oscillation phenomenon

    SciTech Connect (OSTI)

    Qu, Weizheng; Li, Chun; Du, Ling; Huang, Fei [Ocean University of China, 14-1'-601, 2117 Jinshui Road, Qingdao 266100 (China); Li, Yanfang, E-mail: quweizhe@ouc.edu.cn [Yantai Institute of Coastal Zone Research Chinese Academy of Sciences (China)

    2014-12-01

    Based on spectrum analysis, we provide the arithmetic expressions of the quasi 11 yr cycle, 110 yr century cycle of relative sunspot numbers, and quasi 22 yr cycle of solar magnetic field polarity. Based on a comparative analysis of the monthly average geopotential height, geopotential height anomaly, and temperature anomaly of the northern hemisphere at locations with an air pressure of 500 HPa during the positive and negative phases of AO (Arctic Oscillation), one can see that the abnormal warming period in the Arctic region corresponds to the negative phase of AO, while the anomalous cold period corresponds to its positive phase. This shows that the abnormal change in the Arctic region is an important factor in determining the anomalies of AO. In accordance with the analysis performed using the successive filtering method, one can see that the AO phenomenon occurring in January shows a clear quasi 88 yr century cycle and quasi 22 yr decadal cycle, which are closely related to solar activities. The results of our comparative analysis show that there is a close inverse relationship between the solar activities (especially the solar magnetic field index changes) and the changes in the 22 yr cycle of the AO occurring in January, and that the two trends are basically opposite of each other. That is to say, in most cases after the solar magnetic index MI rises from the lowest value, the solar magnetic field turns from north to south, and the high-energy particle flow entering the Earth's magnetosphere increases to heat the polar atmosphere, thus causing the AO to drop from the highest value; after the solar magnetic index MI drops from the highest value, the solar magnetic field turns from south to north, and the solar high-energy particle flow passes through the top of the Earth's magnetosphere rather than entering it to heat the polar atmosphere. Thus the polar temperature drops, causing the AO to rise from the lowest value. In summary, the variance contribution rate of the changes in the quasi 110 yr century cycle and quasi 22 yr decadal cycle for the AO reaches 62.9%, indicating that solar activity is an important driving factor of the AO.

  16. R E S E A R C H A R T I C L E Eukaryotes in Arctic and Antarctic cyanobacterial mats

    E-Print Network [OSTI]

    Vincent, Warwick F.

    , the Arctic and Antarctic mats are multilayered three-dimensional structures, where exo-polymer nutrient recycling and scav- enging systems to cope with the low allochthonous input of nutrients

  17. Pan-Arctic land–atmospheric fluxes of methane and carbon dioxide in response to climate change over the 21st century

    E-Print Network [OSTI]

    Zhu, Xudong

    Future changes of pan-Arctic land–atmospheric methane (CH[subscript 4]) and carbon dioxide (CO[subscript 2]) depend on how terrestrial ecosystems respond to warming climate. Here, we used a coupled hydrology–biogeochemistry ...

  18. Appeared, Proceedings, 17th Intl. Conf. on O shore Mechanics and Arctic Engineering Lisbon, 1998 Under review, Journal of OMAE, ASME.

    E-Print Network [OSTI]

    Sweetman, Bert

    Appeared, Proceedings, 17th Intl. Conf. on O#11;shore Mechanics and Arctic Engineering Lisbon, 1998 building codes, or the sep- arate factors recently suggested for static, wave- frequency, and slow

  19. Distinguishing the impacts of ozone-depleting substances and well-mixed greenhouse gases on Arctic stratospheric ozone and temperature trends

    E-Print Network [OSTI]

    Rieder, Harald E.

    Whether stratospheric cooling due to increases in well-mixed greenhouse gases (WMGHG) could increase the depletion of Arctic stratospheric ozone has been the subject of scientific and public attention for decades. Here we ...

  20. Radiocarbon in particulate matter from the eastern sub-arctic Pacific Ocean; evidence of a source of terrestrial carbon to the deep sea.

    E-Print Network [OSTI]

    Druffel, Ellen R M; Honju, Susumu; Griffin, Sheila; Wong, C S

    1986-01-01

    in the sub-Arctic Pacific Ocean: Inter- natl North PacificSalmon of the North Pacific Ocean-Part II-Review of theproduced carbon-14 by the Pacific Ocean: Ph D dissert, Univ

  1. Development and Demonstration of Mobile, Small Footprint Exploration and Development Well System for Arctic Unconventional Gas Resources (ARCGAS)

    SciTech Connect (OSTI)

    Paul Glavinovich

    2002-11-01

    Traditionally, oil and gas field technology development in Alaska has focused on the high-cost, high-productivity oil and gas fields of the North Slope and Cook Inlet, with little or no attention given to Alaska's numerous shallow, unconventional gas reservoirs (carbonaceous shales, coalbeds, tight gas sands). This is because the high costs associated with utilizing the existing conventional oil and gas infrastructure, combined with the typical remoteness and environmental sensitivity of many of Alaska's unconventional gas plays, renders the cost of exploring for and producing unconventional gas resources prohibitive. To address these operational challenges and promote the development of Alaska's large unconventional gas resource base, new low-cost methods of obtaining critical reservoir parameters prior to drilling and completing more costly production wells are required. Encouragingly, low-cost coring, logging, and in-situ testing technologies have already been developed by the hard rock mining industry in Alaska and worldwide, where an extensive service industry employs highly portable diamond-drilling rigs. From 1998 to 2000, Teck Cominco Alaska employed some of these technologies at their Red Dog Mine site in an effort to quantify a large unconventional gas resource in the vicinity of the mine. However, some of the methods employed were not fully developed and required additional refinement in order to be used in a cost effective manner for rural arctic exploration. In an effort to offset the high cost of developing a new, low-cost exploration methods, the US Department of Energy, National Petroleum Technology Office (DOE-NPTO), partnered with the Nana Regional Corporation and Teck Cominco on a technology development program beginning in 2001. Under this DOE-NPTO project, a team comprised of the NANA Regional Corporation (NANA), Teck Cominco Alaska and Advanced Resources International, Inc. (ARI) have been able to adapt drilling technology developed for the mineral industry for use in the exploration of unconventional gas in rural Alaska. These techniques have included the use of diamond drilling rigs that core small diameter (< 3.0-inch) holes coupled with wireline geophysical logging tools and pressure transient testing units capable of testing in these slimholes.

  2. {open_quotes}Rosshelf{close_quotes} company and development of the Arctic Shelf of Russia

    SciTech Connect (OSTI)

    Velikhov, E.P.

    1994-09-01

    The Russian {open_quotes}Rosshelf{close_quotes} company for developing the shelf is the nucleus of a new branch of industry for developing oil and gas fields on shelves of Russia, primarily in the Arctic. {open_quotes}Rosshelf{close_quotes}, created on the basis of leading naval defence enterprises, Russia`s largest geological and mining enterprises, and territorial organizations managing the northern regions of Russia, obtained a license in March 1993 for the right to use the natural resources of Europe`s largest Shtokman gas-condensate field and Prirazlomnoe oil field in the Barents Sea and thus has all the conditions and possibilities for the successful organization of oil and gas production on the continental shelf of Russia. The goals of {open_quotes}Rosshelf{close_quotes} are: the production of oil and gas equipment at converted defence enterprises, including under foreign license and for export; the development of oil and gas fields on the continental shelf of Russia; the creation of new prospective technologies for offshore oil and gas production under conditions of the Russian and mainly the arctic shelf. {open_quotes}Rosshelf{close_quotes} should develop the Pechora Sea fields, mainly the Prirazlomnoe oil field with its relatively small depth and distance from the shore. It is planned to develop Europe`s largest Shtokman field at a distance of 600 km from the shore in the course of 10-12 years with expenditures of about $6 billion. The use of defence technologies underlying the activities of {open_quotes}Rosshelf{close_quotes} gives the company a real change to reach the world level of offshore oil- and gas-production technology. Broad cooperation with foreign companies, mainly in the area of engineering, finances, ecology, and safety, planned also for this. Calculations show that already the priority projects of {open_quotes}Rosshelf{close_quotes} will provide 250,000-300,000 highly skilled jobs at Russian defence enterprises.

  3. [A data collection program focused on hydrologic and meteorologic parameters in an Arctic ecosystem

    SciTech Connect (OSTI)

    Kane, D.

    1992-12-31

    The hydrologic cycle of an arctic watershed is dominated by such physical elements as snow, ice, permafrost, seasonally frozen soils, wide fluctuations in surface energy balance and phase change of snow and ice to water. At Imnavait basin, snow accumulation begins in September or early October and maximum snowpack water equivalent is reached just prior to the onset of ablation in mid May. No significant mid winter melt occurs in this basin. Considerable snowfall redistribution by wind to depressions and valley bottom is evident. Spring snowmelt on the North Slope of Alaska is the dominant hydrologic event of the year.This event provides most of the moisture for use by vegetation in the spring and early summer period. The mechanisms and timing of snowmelt are important factors in predicting runoff, the migrations of birds and large mammals and the diversity of plant communities. It is important globally due to the radical and abrupt change in the surface energy balance over vast areas. We were able to explore the trends and differences in the snowmelt process along a transect from the Brooks Range to the Arctic Coastal plain. Snowpack ablation was monitored at three sites. These data were analyzed along with meteorologic data at each site. The initiation of ablation was site specific being largely controlled by the complementary addition of energy from radiation and sensible heat flux. Although the research sites were only 115 km apart, the rates and mechanisms of snowmelt varied greatly. Usually, snowmelt begins at the mid-elevations in the foothills and progresses northerly toward the coast and southerly to the mountains. In the more southerly areas snowmelt progressed much faster and was more influenced by sensible heat advected from areas south of the Brooks Range. In contrast snowmelt in the more northerly areas was slower and the controlled by net radiation.

  4. [A data collection program focused on hydrologic and meteorologic parameters in an Arctic ecosystem

    SciTech Connect (OSTI)

    Kane, D.

    1992-01-01

    The hydrologic cycle of an arctic watershed is dominated by such physical elements as snow, ice, permafrost, seasonally frozen soils, wide fluctuations in surface energy balance and phase change of snow and ice to water. At Imnavait basin, snow accumulation begins in September or early October and maximum snowpack water equivalent is reached just prior to the onset of ablation in mid May. No significant mid winter melt occurs in this basin. Considerable snowfall redistribution by wind to depressions and valley bottom is evident. Spring snowmelt on the North Slope of Alaska is the dominant hydrologic event of the year.This event provides most of the moisture for use by vegetation in the spring and early summer period. The mechanisms and timing of snowmelt are important factors in predicting runoff, the migrations of birds and large mammals and the diversity of plant communities. It is important globally due to the radical and abrupt change in the surface energy balance over vast areas. We were able to explore the trends and differences in the snowmelt process along a transect from the Brooks Range to the Arctic Coastal plain. Snowpack ablation was monitored at three sites. These data were analyzed along with meteorologic data at each site. The initiation of ablation was site specific being largely controlled by the complementary addition of energy from radiation and sensible heat flux. Although the research sites were only 115 km apart, the rates and mechanisms of snowmelt varied greatly. Usually, snowmelt begins at the mid-elevations in the foothills and progresses northerly toward the coast and southerly to the mountains. In the more southerly areas snowmelt progressed much faster and was more influenced by sensible heat advected from areas south of the Brooks Range. In contrast snowmelt in the more northerly areas was slower and the controlled by net radiation.

  5. Remote Sensing and In-Situ Observations of Arctic Mixed-Phase and Cirrus Clouds Acquired During Mixed-Phase Arctic Cloud Experiment: Atmospheric Radiation Measurement Uninhabited Aerospace Vehicle Participation

    SciTech Connect (OSTI)

    McFarquhar, G.M.; Freer, M.; Um, J.; McCoy, R.; Bolton, W.

    2005-03-18

    The Atmospheric Radiation Monitor (ARM) uninhabited aerospace vehicle (UAV) program aims to develop measurement techniques and instruments suitable for a new class of high altitude, long endurance UAVs while supporting the climate community with valuable data sets. Using the Scaled Composites Proteus aircraft, ARM UAV participated in Mixed-Phase Arctic Cloud Experiment (M-PACE), obtaining unique data to help understand the interaction of clouds with solar and infrared radiation. Many measurements obtained using the Proteus were coincident with in-situ observations made by the UND Citation. Data from M-PACE are needed to understand interactions between clouds, the atmosphere and ocean in the Arctic, critical interactions given large-scale models suggest enhanced warming compared to lower latitudes is occurring.

  6. Using an Explicit Emission Tagging Method in Global Modeling of Source-Receptor Relationships for Black Carbon in the Arctic: Variations, Sources and Transport Pathways

    SciTech Connect (OSTI)

    Wang, Hailong; Rasch, Philip J.; Easter, Richard C.; Singh, Balwinder; Zhang, Rudong; Ma, Po-Lun; Qian, Yun; Ghan, Steven J.; Beagley, Nathaniel

    2014-11-27

    We introduce an explicit emission tagging technique in the Community Atmosphere Model to quantify source-region-resolved characteristics of black carbon (BC), focusing on the Arctic. Explicit tagging of BC source regions without perturbing the emissions makes it straightforward to establish source-receptor relationships and transport pathways, providing a physically consistent and computationally efficient approach to produce a detailed characterization of the destiny of regional BC emissions and the potential for mitigation actions. Our analysis shows that the contributions of major source regions to the global BC burden are not proportional to the respective emissions due to strong region-dependent removal rates and lifetimes, while the contributions to BC direct radiative forcing show a near-linear dependence on their respective contributions to the burden. Distant sources contribute to BC in remote regions mostly in the mid- and upper troposphere, having much less impact on lower-level concentrations (and deposition) than on burden. Arctic BC concentrations, deposition and source contributions all have strong seasonal variations. Eastern Asia contributes the most to the wintertime Arctic burden. Northern Europe emissions are more important to both surface concentration and deposition in winter than in summer. The largest contribution to Arctic BC in the summer is from Northern Asia. Although local emissions contribute less than 10% to the annual mean BC burden and deposition within the Arctic, the per-emission efficiency is much higher than for major non-Arctic sources. The interannual variability (1996-2005) due to meteorology is small in annual mean BC burden and radiative forcing but is significant in yearly seasonal means over the Arctic. When a slow aging treatment of BC is introduced, the increase of BC lifetime and burden is source-dependent. Global BC forcing-per-burden efficiency also increases primarily due to changes in BC vertical distributions. The relative contribution from major non-Arctic sources to the Arctic BC burden increases only slightly, although the contribution of Arctic local sources is reduced by a factor of 2 due to the slow aging treatment.

  7. The role of ice nuclei recycling in the maintenance of cloud ice in Arctic mixed-phase stratocumulus

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

    Solomon, A.; Feingold, G.; Shupe, M. D.

    2015-09-25

    This study investigates the maintenance of cloud ice production in Arctic mixed-phase stratocumulus in large eddy simulations that include a prognostic ice nuclei (IN) formulation and a diurnal cycle. Balances derived from a mixed-layer model and phase analyses are used to provide insight into buffering mechanisms that maintain ice in these cloud systems. We find that, for the case under investigation, IN recycling through subcloud sublimation considerably prolongs ice production over a multi-day integration. This effective source of IN to the cloud dominates over mixing sources from above or below the cloud-driven mixed layer. Competing feedbacks between dynamical mixing andmore »recycling are found to slow the rate of ice lost from the mixed layer when a diurnal cycle is simulated. The results of this study have important implications for maintaining phase partitioning of cloud ice and liquid that determine the radiative forcing of Arctic mixed-phase clouds.« less

  8. The role of ice nuclei recycling in the maintenance of cloud ice in Arctic mixed-phase stratocumulus

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

    Solomon, A.; Feingold, G.; Shupe, M. D.

    2015-04-21

    This study investigates the maintenance of cloud ice production in Arctic mixed phase stratocumulus in large-eddy simulations that include a prognostic ice nuclei (IN) formulation and a diurnal cycle. Balances derived from a mixed-layer model and phase analyses are used to provide insight into buffering mechanisms that maintain ice in these cloud systems. We find that for the case under investigation, IN recycling through subcloud sublimation considerably prolongs ice production over a multi-day integration. This effective source of IN to the cloud dominates over mixing sources from above or below the cloud-driven mixed layer. Competing feedbacks between dynamical mixing andmore »recycling are found to slow the rate of ice lost from the mixed layer when a diurnal cycle is simulated. The results of this study have important implications for maintaining phase partitioning of cloud ice and liquid that determine the radiative forcing of Arctic mixed-phase clouds.« less

  9. BETR-world: A geographically explicit model of chemical fate: Application to transport of a-HCH to the arctic

    SciTech Connect (OSTI)

    Toose, Liisa; Woodfine, David G.; MacLeod, Matthew; Mackay, Don; Gouin, Jenn

    2003-12-01

    The Berkeley Trent (BETR)-World model, a 25 compartment, geographically explicit fugacity-based model is described and applied to evaluate the transport of chemicals from temperate source regions to receptor regions (such as the Arctic). The model was parameterized using GIS and an array of digital data on weather, oceans, freshwater, vegetation and geo-political boundaries. This version of the BETR model framework includes modification of atmospheric degradation rates by seasonally variable hydroxyl radical concentrations and temperature. Degradation rates in all other compartments vary with seasonally changing temperature. Deposition to the deep ocean has been included as a loss mechanism. A case study was undertaken for a-HCH. Dynamic emission scenarios were estimated for each of the 25 regions. Predicted environmental concentrations showed good agreement with measured values for the northern regions in air , and fresh and oceanic water and with the results from a previous model of global chemical fate. Potential for long-range transport and deposition to the Arctic region was assessed using a Transfer Efficiency combined with estimated emissions. European regions and the Orient including China have a high potential to contribute a-HCH contamination in the Arctic due to high rates of emission in these regions despite low Transfer Efficiencies. Sensitivity analyses reveal that the performance and reliability of the model is strongly in sequenced by parameters controlling degradation rates.

  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 2004–June 2005 ranged from 496.4 to 511.5 Tg yr?1, with wetlandmore »methane emissions ranging from 130.0 to 203.3 Tg yr?1. The Arctic methane emissions during July 2004–June 2005 were in the range of 14.6–30.4 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. Contribution of oceanic gas hydrate dissociation to the formation of Arctic Ocean methane plumes

    SciTech Connect (OSTI)

    Reagan, M.; Moridis, G.; Elliott, S.; Maltrud, M.

    2011-06-01

    Vast quantities of methane are trapped in oceanic hydrate deposits, and there is concern that a rise in the ocean temperature will induce dissociation of these hydrate accumulations, potentially releasing large amounts of carbon into the atmosphere. Because methane is a powerful greenhouse gas, such a release could have dramatic climatic consequences. The recent discovery of active methane gas venting along the landward limit of the gas hydrate stability zone (GHSZ) on the shallow continental slope (150 m - 400 m) west of Svalbard suggests that this process may already have begun, but the source of the methane has not yet been determined. This study performs 2-D simulations of hydrate dissociation in conditions representative of the Arctic Ocean margin to assess whether such hydrates could contribute to the observed gas release. The results show that shallow, low-saturation hydrate deposits, if subjected to recently observed or future predicted temperature changes at the seafloor, can release quantities of methane at the magnitudes similar to what has been observed, and that the releases will be localized near the landward limit of the GHSZ. Both gradual and rapid warming is simulated, along with a parametric sensitivity analysis, and localized gas release is observed for most of the cases. These results resemble the recently published observations and strongly suggest that hydrate dissociation and methane release as a result of climate change may be a real phenomenon, that it could occur on decadal timescales, and that it already may be occurring.

  12. EXOPLANETS FROM THE ARCTIC: THE FIRST WIDE-FIELD SURVEY AT 80 Degree-Sign N

    SciTech Connect (OSTI)

    Law, Nicholas M.; Sivanandam, Suresh; Carlberg, Raymond; Salbi, Pegah; Ngan, Wai-Hin Wayne; Kerzendorf, Wolfgang; Ahmadi, Aida; Steinbring, Eric; Murowinski, Richard

    2013-03-15

    Located within 10 Degree-Sign of the North Pole, northern Ellesmere Island offers continuous darkness in the winter months. This capability can greatly enhance the detection efficiency of planetary transit surveys and other time domain astronomy programs. We deployed two wide-field cameras at 80 Degree-Sign N, near Eureka, Nunavut, for a 152 hr observing campaign in 2012 February. The 16 megapixel camera systems were based on commercial f/1.2 lenses with 70 mm and 42 mm apertures, and they continuously imaged 504 and 1295 deg{sup 2}, respectively. In total, the cameras took over 44,000 images and produced better than 1% precision light curves for approximately 10,000 stars. We describe a new high-speed astrometric and photometric data reduction pipeline designed for the systems, test several methods for the precision flat fielding of images from very-wide-angle cameras, and evaluate the cameras' image qualities. We achieved a scintillation-limited photometric precision of 1%-2% in each 10 s exposure. Binning the short exposures into 10 minute chunks provided a photometric stability of 2-3 mmag, sufficient for the detection of transiting exoplanets around the bright stars targeted by our survey. We estimate that the cameras, when operated over the full Arctic winter, will be capable of discovering several transiting exoplanets around bright (m{sub V} < 9.5) stars.

  13. Process-model Simulations of Cloud Albedo Enhancement by Aerosols in the Arctic

    SciTech Connect (OSTI)

    Kravitz, Benjamin S.; Wang, Hailong; Rasch, Philip J.; Morrison, H.; Solomon, Amy

    2014-11-17

    A cloud-resolving model is used to simulate the effectiveness of Arctic marine cloud brightening via injection of cloud condensation nuclei (CCN). An updated cloud microphysical scheme is employed, with prognostic CCN and cloud particle numbers in both liquid and mixed-phase marine low clouds. Injection of CCN into the marine boundary layer can delay the collapse of the boundary layer and increase low-cloud albedo. Because nearly all of the albedo effects are in the liquid phase due to the removal of ice water by snowfall when ice processes are involved, albedo increases are stronger for pure liquid clouds than mixed-phase clouds. Liquid precipitation can be suppressed by CCN injection, whereas ice precipitation (snow) is affected less; thus the effectiveness of brightening mixed-phase clouds is lower than for liquid-only clouds. CCN injection into a clean regime results in a greater albedo increase than injection into a polluted regime, consistent with current knowledge about aerosol-cloud interactions. Unlike previous studies investigating warm clouds, dynamical changes in circulation due to precipitation changes are small.

  14. March 12th 2013 hOtEL bristOL, OsLO www.economistconferences.com/Arctic

    E-Print Network [OSTI]

    Habib, Ayman

    R O f f i C i A L P R Ag E n C Y arCtiC suMMit A nEW ViSTA fOR tRADe, eneRgy AnD tHe envIROnment #12Igen yAng Director Polar Research Institute of China nInA JenSen Chief Executive Officer and Secretary-CHAIR JAmeS AStIll Political Editor The Economist AqqAluK lynge Chair Inuit Circumpolar Council #12;t

  15. Concept of the transport system in the western part of the Arctic

    SciTech Connect (OSTI)

    Parfenov, A.F.

    1994-09-01

    According to the concept of the energy policy of Russia under new economic conditions, the production of oil and gas condensate after a decline to 300-345 million tons/yr in 1997 will reach 370-400 million tons in 2010, and the export of oil and petroleum products, apart from countries of the CIS, will be 90-120 million tons/yr and of natural gas 130-140 billion m{sup 3}. The main sources of oil and gas production will be Volga region and Tyumen, Yamal, and Pechora-Nenets provinces. The most prospective oil and gas fields are located in an extensive territory north of the Arctic Circle and on the continental shelf of the Barnets and Kara Seas. The geographic location of the world`s richest fields of energy resources creates favorable conditions for their export to Northern Europe, northern states of the USA and Canada, and after developing direct sailing along the Northern Sea Route. According to preliminary data, the volume of export of oil and petroleum products in the next 10-15 years form this region can amount to 20-25 millions tons and delivery of supplies 1.5-2.0 million tons. Sea transport plays a substantial role in export shipments. In 1989, 98.0 Million tons of oil was unloaded through Black Sea and Baltic ports. The transport system should be reliable, ecologically safe, and cost-effective, should adapt well for providing the fields being developed on the continent and shelf with transport services, and should deliver oil and products to any importing country. With consideration of the complex; and importance of the problem, in the present concept the transport system in the stretch of domestic traffic is examined in there variants: variant 1 - {open_quotes}Island terminal,{close_quotes} variant 2 - {open_quotes}Oil trunk pipeline,{close_quotes} 3 - {open_quotes}Shore terminal.{close_quotes}

  16. The influence of mixed and phase clouds on surface shortwave irradiance during the Arctic spring

    SciTech Connect (OSTI)

    Lubin D.; Vogelmann A.

    2011-10-13

    The influence of mixed-phase stratiform clouds on the surface shortwave irradiance is examined using unique spectral shortwave irradiance measurements made during the Indirect and Semi-Direct Aerosol Campaign (ISDAC), supported by the U.S. Department of Energy Atmospheric Radiation Measurement (ARM) program. An Analytical Spectral Devices (ASD, Inc.) spectroradiometer measured downwelling spectral irradiance from 350 to 2200 nm in one-minute averages throughout April-May 2008 from the ARM Climate Research Facility's North Slope of Alaska (NSA) site at Barrow. This study examines spectral irradiance measurements made under single-layer, overcast cloud decks having geometric thickness < 3000 m. Cloud optical depth is retrieved from irradiance in the interval 1022-1033 nm. The contrasting surface radiative influences of mixed-phase clouds and liquid-water clouds are discerned using irradiances in the 1.6-{micro}m window. Compared with liquid-water clouds, mixed-phase clouds during the Arctic spring cause a greater reduction of shortwave irradiance at the surface. At fixed conservative-scattering optical depth (constant optical depth for wavelengths {lambda} < 1100 nm), the presence of ice water in cloud reduces the near-IR surface irradiance by an additional several watts-per-meter-squared. This additional reduction, or supplemental ice absorption, is typically {approx}5 W m{sup -2} near solar noon over Barrow, and decreases with increasing solar zenith angle. However, for some cloud decks this additional absorption can be as large as 8-10 W m{sup -2}.

  17. Radioactive and other environmental threats to the United States and the Arctic resulting from past Soviet activities

    SciTech Connect (OSTI)

    1993-12-31

    Earlier this year the Senate Intelligence Committee began to receive reports from environmental and nuclear scientists in Russia detailing the reckless nuclear waste disposal practices, nuclear accidents and the use of nuclear detonations. We found that information disturbing to say the least. Also troubling is the fact that 15 Chernobyl style RBMK nuclear power reactors continue to operate in the former Soviet Union today. These reactors lack a containment structure and they`re designed in such a way that nuclear reaction can actually increase when the reactor overheats. As scientists here at the University of Alaska have documented, polar air masses and prevailing weather patterns provide a pathway for radioactive contaminants from Eastern Europe and Western Russia, where many of these reactors are located. The threats presented by those potential radioactive risks are just a part of a larger Arctic pollution problem. Every day, industrial activities of the former Soviet Union continue to create pollutants. I think we should face up to the reality that in a country struggling for economic survival, environment protection isn`t necessarily the high priority. And that could be very troubling news for the Arctic in the future.

  18. Effects of spatially variable snow cover on thermal regime and hydrology of an Arctic ice wedge polygon landscape identified using ground

    E-Print Network [OSTI]

    Hubbard, Susan

    Effects of spatially variable snow cover on thermal regime and hydrology of an Arctic ice wedge. Understanding the linkages between microtopography, snow cover, thermal properties, and thaw depth is critical the spatial variability of snow distribution. We compare it's distribution to microtopography, estimated using

  19. A Potential Role for Immersion Freezing in Arctic Mixed-Phase Stratus Gijs de Boer,Edwin W.Eloranta,Tempei Hashino,and Gregory J.Tripoli

    E-Print Network [OSTI]

    Eloranta, Edwin W.

    A Potential Role for Immersion Freezing in Arctic Mixed-Phase Stratus Gijs de Boer,Edwin W and deposition freezing are not primarily re- sponsible for ice production, as all require free IN for activation. Immersion freezing is not included with this grouping, however, as it is unclear whether immersed IN would

  20. Omics in the Arctic: Genome-enabled Contributions to Carbon Cycle Research in High-Latitude Ecosystems (JGI Seventh Annual User Meeting 2012: Genomics of Energy and Environment)

    ScienceCinema (OSTI)

    Wullschleger, Stan [ORNL

    2013-01-22

    Stan Wullschleger of Oak Ridge National Laboratory on "Omics in the Arctic: Genome-enabled Contributions to Carbon Cycle Research in High-Latitude Ecosystems" on March 22, 2012 at the 7th Annual Genomics of Energy & Environment Meeting in Walnut Creek, California.

  1. Omics in the Arctic: Genome-enabled Contributions to Carbon Cycle Research in High-Latitude Ecosystems (JGI Seventh Annual User Meeting 2012: Genomics of Energy and Environment)

    SciTech Connect (OSTI)

    Wullschleger, Stan [ORNL] [ORNL

    2012-03-22

    Stan Wullschleger of Oak Ridge National Laboratory on "Omics in the Arctic: Genome-enabled Contributions to Carbon Cycle Research in High-Latitude Ecosystems" on March 22, 2012 at the 7th Annual Genomics of Energy & Environment Meeting in Walnut Creek, California.

  2. Model-data Fusion Approaches for Retrospective and Predictive Assessment of the Pan-Arctic Scale Permafrost Carbon Feedback to Global Climate

    E-Print Network [OSTI]

    representation of the Arctic system carbon cycle in Earth System Modeling frameworks. This proposed study of permafrost carbon processes in terrestrial biogeochemistry models, to operate within coupled Earth system modeling frameworks. PROJECT SIGNIFICANCE This work will provide a critical bridge between the abundant

  3. arXiv:1408.2487v2[physics.ao-ph]22Aug2014 Ising model for melt ponds on Arctic sea ice

    E-Print Network [OSTI]

    Golden, Kenneth M.

    arXiv:1408.2487v2[physics.ao-ph]22Aug2014 Ising model for melt ponds on Arctic sea ice Yi-Ping Ma,1 of water on the ice surface. Recent observations show an onset of pond complexity at a critical area modeling, we introduce a two dimensional Ising model for pond evolution which incorporates ice

  4. Further observations of a decreasing atmospheric CO2 uptake capacity in the Canada Basin (Arctic Ocean) due to sea ice loss

    E-Print Network [OSTI]

    Boyer, Edmond

    decayed ice cover, we found surprisingly high pCO2sw (~290­320 matm), considering that surface waterFurther observations of a decreasing atmospheric CO2 uptake capacity in the Canada Basin (Arctic as an atmospheric CO2 sink under the summertime ice-free conditions expected in the near future. Beneath a heavily

  5. Fusion Power Associates Awards

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

    Fusion Power Associates Awards Fusion Power Associates is "a non-profit, tax-exempt research and educational foundation, providing information on the status of fusion development...

  6. Rural Health Association

    E-Print Network [OSTI]

    Maxwell, Bruce D.

    Montana Rural Health Association Phone: 406-994-6004 Fax: 406-994-5653 E-mail: MRHA 170520 Bozeman, Montana 59717-0520 Montana Rural Health Association Membershipdesignation.Membershipisrenewedonan annualbasis.PleasemakecheckspayabletoMontanaRuralHealth

  7. Report of the workshop on Arctic oil and gas recovery held at Sandia National Laboratories, Albuquerque, New Mexico, June 30-July 2, 1980

    SciTech Connect (OSTI)

    Sackinger, W. M.

    1980-09-01

    This report is the result of a workshop on Arctic offshore oil and gas recovery, held at Sandia National Laboratories Albuquerque, New Mexico, on June 30-July 2, 1980. Research priorities for the technology related to Arctic offshore oil and gas production were defined. The workshop was preceded by a report entitled, A Review of Technology for Arctic Offshore Oil and Gas Recovery, authored by Dr. W. M. Sackinger. The mission of the workshop was to identify research priorities without considering whether the research should be conducted by government or by industry. Nevertheless, at the end of the meeting the general discussion did consider this, and the concensus was that environmental properties should certainly be of concern to the government, that implementation of petroleum operations was the province of industry, and that overlapping, coordinated areas of interest include both environment and interactions of the environment with structures, transport systems, and operations. An attempt to establish relative importance and a time frame was made after the workshop through the use of a survey form. The form and a summary of its results, and a discussion of its implications, are given.

  8. Advanced Refrigerant-Based Cooling Technologies for Information and Communication Infrastructure (ARCTIC)

    SciTech Connect (OSTI)

    Todd Salamon

    2012-12-13

    Faster, more powerful and dense computing hardware generates significant heat and imposes considerable data center cooling requirements. Traditional computer room air conditioning (CRAC) cooling methods are proving increasingly cost-ineffective and inefficient. Studies show that using the volume of room air as a heat exchange medium is wasteful and allows for substantial mixing of hot and cold air. Further, it limits cabinet/frame/rack density because it cannot effectively cool high heat density equipment that is spaced closely together. A more cost-effective, efficient solution for maximizing heat transfer and enabling higher heat density equipment frames can be accomplished by utilizing properly positioned �¢����phase change�¢��� or �¢����two-phase�¢��� pumped refrigerant cooling methods. Pumping low pressure, oil-free phase changing refrigerant through microchannel heat exchangers can provide up to 90% less energy consumption for the primary cooling loop within the room. The primary benefits of such a solution include reduced energy requirements, optimized utilization of data center space, and lower OPEX and CAPEX. Alcatel-Lucent recently developed a modular cooling technology based on a pumped two-phase refrigerant that removes heat directly at the shelf level of equipment racks. The key elements that comprise the modular cooling technology consist of the following. A pump delivers liquid refrigerant to finned microchannel heat exchangers mounted on the back of equipment racks. Fans drive air through the equipment shelf, where the air gains heat dissipated by the electronic components therein. Prior to exiting the rack, the heated air passes through the heat exchangers, where it is cooled back down to the temperature level of the air entering the frame by vaporization of the refrigerant, which is subsequently returned to a condenser where it is liquefied and recirculated by the pump. All the cooling air enters and leaves the shelves/racks at nominally the same temperature. Results of a 100 kW prototype data center installation of the refrigerant-based modular cooling technology were dramatic in terms of energy efficiency and the ability to cool high-heat-density equipment. The prototype data center installation consisted of 10 racks each loaded with 10 kW of high-heat-density IT equipment with the racks arranged in a standard hot-aisle/cold-aisle configuration with standard cabinet spacing. A typical chilled-water CRAC unit would require approximately 16 kW to cool such a heat load. In contrast, the refrigerant-based modular cooling technology required only 2.3 kW of power for the refrigerant pump and shelf-level fans, a reduction of 85 percent. Differences in hot-aisle and cold-aisle temperature were also substantially reduced, mitigating many issues that arise in purely air-based cooling systems, such as mixing of hot and cold air streams, or from placing high-heat-density equipment in close proximity. The technology is also such that it is able to retro-fit live equipment without service interruption, which is particularly important to the large installed ICT customer base, thereby providing a means of mitigating reliability and performance concerns during the installation, training and validation phases of product integration. Moreover, the refrigerant used in our approach, R134a, is a widely-used, non-toxic dielectric liquid which, unlike water, is non-conducting and non-corrosive and will not damage electronics in the case of a leak�¢����a triple-play win over alternative water-based liquid coolant technologies. Finally, through use of a pumped refrigerant, pressures are modest (~60 psi), and toxic lubricants and oils are not required, in contrast to compressorized refrigerant systems�¢����another environmental win. Project Activities - The ARCTIC project goal was to further develop an

  9. The controls on net ecosystem productivity along an Arctic transect: a model comparison with ux

    E-Print Network [OSTI]

    production (NEP) at sites with widely differing vegetation structure and moss/lichen cover. Errors were mostly associated with the predictions of maximum NEP; the likely cause of such discrepancies was (i for an actual reduction in NEP caused by water stress on warm, dry days at some sites. The model±¯ux comparison

  10. Habitat change and the scale of habitat selection: shifting gradients used by coexisting Arctic rodents

    E-Print Network [OSTI]

    Morris, Douglas W.

    of association with the structure and composition of habitat. Abundant collared lemmings abandoned stations where altered habitat characteristics caused a shift to new locations along the wet-to-dry gradient convincing case that habitat loss and change thus represent the most pressing issue for the conservation

  11. Proceedings of OMAE08 27th International Conference on Offshore Mechanics and Arctic Engineering

    E-Print Network [OSTI]

    Manuel, Lance

    OF LONG-TERM OFFSHORE WIND TURBINE LOADS P. Agarwal Dept. of Civil, Arch., and Env. Engineering University of wind turbines--onshore or offshore--the prediction of extreme loads associated with a target return pe not adequately represent waves in shal- low waters where most offshore wind turbines are being sited

  12. Brookhaven Science Associates, LLC

    Broader source: Energy.gov (indexed) [DOE]

    into the facts and circumstances associated with the meteorological tower electrical shock event that occurred at the Brookhaven National Laboratory on November 12,...

  13. High-latitude cooling associated with landscape changes from North American boreal forest fires

    E-Print Network [OSTI]

    Rogers, B. M; Randerson, J. T; Bonan, G. B

    2013-01-01

    stand age on the bo- real forest energy balance, Agr. Forestenergy exchange in Arctic tundra and boreal forest:diox- ide and energy fluxes, Agr. Forest Meteorol. , 96,

  14. Rapid dynamic activation of a marine-based Arctic ice cap

    E-Print Network [OSTI]

    McMillan, Malcolm; Shepherd, Andrew; Gourmelen, Noel; Dehecq, Amaury; Leeson, Amber; Ridout, Andrew; Flament, Thomas; Hogg, Anna; Gilbert, Lin; Benham, Toby; van den Broeke, Michiel; Dowdeswell, Julian A.; Fettweis, Xavier; Noël, Brice; Strozzi, Tazio

    2014-12-02

    acquired over a succession of orbit cycles were grouped either within along-track segments (Envisat and ICESat) or 2–5 km square geographic regions (CryoSat), and these data were then used to estimate spatial and temporal rates of elevation change... whether the associated reduction in resistive stresses, with its capacity to drive further thinning and acceleration [Nick et al., 2009; Pfeffer, 2007], could have mobilized the entire basin. As such, this analysis does not establish a direct causal link...

  15. Associative list processing unit

    DOE Patents [OSTI]

    Hemmert, Karl Scott; Underwood, Keith D.

    2013-01-29

    An associative list processing unit and method comprising employing a plurality of prioritized cell blocks and permitting inserts to occur in a single clock cycle if all of the cell blocks are not full. Also, an associative list processing unit and method comprising employing a plurality of prioritized cell blocks and using a tree of prioritized multiplexers descending from the plurality of cell blocks.

  16. The design of steel for high strength line pipe requiring excellent notch toughness and corrosion properties for arctic applications

    SciTech Connect (OSTI)

    DeCaux, G.; Golini, F.; Rayner, T.J.

    1998-12-31

    Due to the cold climate and environmental requirements of Alaska`s North Slope and Western Canada`s oil production areas, line pipe steels intended for use in these areas must display not only high strength as required, but superior toughness. Additionally,if the line pipe is to be used in aggressive sour gas (i.e., H{sub 2}S containing) environments it must also have excellent resistance to hydrogen induced cracking (HIC). Such a steel has been designed, through selective chemistry, clean steel-making practices, nonmetallic inclusion control, and hot mill process control, that is capable of meeting stringent line pipe specifications covering X65 grade line pipe in Arctic service temperatures. This paper also examined the effect that hot rolling finishing temperature had on notch toughness. Steel-making knowledge developed for lower strength, HIC resistant X52 grade steel has been employed for the development of a X65 grade steel. Results of trial heats will be presented.

  17. Associative list processing unit

    DOE Patents [OSTI]

    Hemmert, Karl Scott; Underwood, Keith D

    2014-04-01

    An associative list processing unit and method comprising employing a plurality of prioritized cell blocks and permitting inserts to occur in a single clock cycle if all of the cell blocks are not full.

  18. Sponsors of CIEEDAC: Environment Canada, Natural Resources Canada, Aluminium Association of Canada, Automobile Parts Manufacturing Association, Brewers Association of Canada, Canadian Fertilizer Institute, Canadian Foundry Association, Canadian Fuels

    E-Print Network [OSTI]

    Institute, Canadian Foundry Association, Canadian Fuels Association, Canadian Gas Association, Canadian

  19. Intercomparison of Large-eddy Simulations of Arctic Mixed-phase Clouds: Importance of Ice Size Distribution Assumptions

    SciTech Connect (OSTI)

    Ovchinnikov, Mikhail; Ackerman, Andrew; Avramov, Alex; Cheng, Anning; Fan, Jiwen; Fridlind, Ann; Ghan, Steven J.; Harrington, Jerry Y.; Hoose, Corinna; Korolev, Alexei; McFarquhar, Greg; Morrison, H.; Paukert, Marco; Savre, Julien; Shipway, Ben; Shupe, Matthew D.; Solomon, Amy; Sulia, Kara

    2014-03-14

    Large-eddy simulations of mixed-phase Arctic clouds by 11 different models are analyzed with the goal of improving understanding and model representation of processes controlling the evolution of these clouds. In a case based on observations from the Indirect and Semi-Direct Aerosol Campaign (ISDAC), it is found that ice number concentration, Ni, exerts significant influence on the cloud structure. Increasing Ni leads to a substantial reduction in liquid water path (LWP) and potential cloud dissipation, in agreement with earlier studies. By comparing simulations with the same microphysics coupled to different dynamical cores as well as the same dynamics coupled to different microphysics schemes, it is found that the ice water path (IWP) is mainly controlled by ice microphysics, while the inter-model differences in LWP are largely driven by physics and numerics of the dynamical cores. In contrast to previous intercomparisons, all models here use the same ice particle properties (i.e., mass-size, mass-fall speed, and mass-capacitance relationships) and a common radiation parameterization. The constrained setup exposes the importance of ice particle size distributions (PSD) in influencing cloud evolution. A clear separation in LWP and IWP predicted by models with bin and bulk microphysical treatments is documented and attributed primarily to the assumed shape of ice PSD used in bulk schemes. Compared to the bin schemes that explicitly predict the PSD, schemes assuming exponential ice PSD underestimate ice growth by vapor deposition and overestimate mass-weighted fall speed leading to an underprediction of IWP by a factor of two in the considered case.

  20. R. Ballarini Associate Professor.

    E-Print Network [OSTI]

    Ballarini, Roberto

    . intensity factor is negligible compared to the energy dissipated in the yielding process. A zero net stress. The reason the stress intensity factor is taken as zero is that the energy release rate associated and concrete [3, 4], since the energy dissipated in the stretching of steel fibers is much greater than

  1. Evaluation of Mixed-Phase Cloud Parameterizations in Short-Range Weather Forecasts with CAM3 and AM2 for Mixed-Phase Arctic Cloud Experiment

    SciTech Connect (OSTI)

    Xie, S; Boyle, J; Klein, S; Liu, X; Ghan, S

    2007-06-01

    By making use of the in-situ data collected from the recent Atmospheric Radiation Measurement Mixed-Phase Arctic Cloud Experiment, we have tested the mixed-phase cloud parameterizations used in the two major U.S. climate models, the National Center for Atmospheric Research Community Atmosphere Model version 3 (CAM3) and the Geophysical Fluid Dynamics Laboratory climate model (AM2), under both the single-column modeling framework and the U.S. Department of Energy Climate Change Prediction Program-Atmospheric Radiation Measurement Parameterization Testbed. An improved and more physically based cloud microphysical scheme for CAM3 has been also tested. The single-column modeling tests were summarized in the second quarter 2007 Atmospheric Radiation Measurement metric report. In the current report, we document the performance of these microphysical schemes in short-range weather forecasts using the Climate Chagne Prediction Program Atmospheric Radiation Measurement Parameterizaiton Testbest strategy, in which we initialize CAM3 and AM2 with realistic atmospheric states from numerical weather prediction analyses for the period when Mixed-Phase Arctic Cloud Experiment was conducted.

  2. The one and only official Santa Claus' Main Post Office is located in the heart of Santa's Workshop Village on the Arctic Circle, eight kilometres north from the centre of Rovaniemi. Santa Claus' Main Post Office is

    E-Print Network [OSTI]

    Bartholdi III, John J.

    The one and only official Santa Claus' Main Post Office is located in the heart of Santa's Workshop Village on the Arctic Circle, eight kilometres north from the centre of Rovaniemi. Santa Claus' Main Post Office is under the responsibility of Finland's post company, Itella Corporation. Santa Claus' Main Post

  3. 02/09/2009 16:58Warming Of Arctic Current Over 30 Years Triggers Release Of Methane Gas Page 1 of 2http://www.sciencedaily.com/releases/2009/08/090814103231.htm

    E-Print Network [OSTI]

    Rohling, Eelco

    Climate Environmental Issues Renewable Energy Oceanography Water Reference Geologic temperature record Installation Course Solar energy heating installation & renewable energ02/09/2009 16:58Warming Of Arctic Current Over 30 Years Triggers Release Of Methane Gas Page 1 of 2

  4. Quasar-galaxy associations

    E-Print Network [OSTI]

    P. A. Thomas; R. L. Webster; M. J. Drinkwater

    1994-08-29

    There is controversy about the measurement of statistical associations between bright quasars and faint, presumably foreground galaxies. We look at the distribution of galaxies around an unbiased sample of 63 bright, moderate redshift quasars using a new statistic based on the separation of the quasar and its nearest neighbour galaxy. We find a significant excess of close neighbours at separations less than about 10 arcsec which we attribute to the magnification by gravitational lensing of quasars which would otherwise be too faint to be included in our sample. About one quarter to one third of the quasars are so affected although the allowed error in this fraction is large.

  5. Source Characterization and Temporal Variation of Methane Seepage from Thermokarst Lakes on the Alaska North Slope in Response to Arctic Climate Change

    SciTech Connect (OSTI)

    2012-09-30

    The goals of this research were to characterize the source, magnitude and temporal variability of methane seepage from thermokarst lakes (TKL) within the Alaska North Slope gas hydrate province, assess the vulnerability of these areas to ongoing and future arctic climate change and determine if gas hydrate dissociation resulting from permafrost melting is contributing to the current lake emissions. Analyses were focused on four main lake locations referred to in this report: Lake Qalluuraq (referred to as Lake Q) and Lake Teshekpuk (both on Alaska?s North Slope) and Lake Killarney and Goldstream Bill Lake (both in Alaska?s interior). From analyses of gases coming from lakes in Alaska, we showed that ecological seeps are common in Alaska and they account for a larger source of atmospheric methane today than geologic subcap seeps. Emissions from the geologic source could increase with potential implications for climate warming feedbacks. Our analyses of TKL sites showing gas ebullition were complemented with geophysical surveys, providing important insight about the distribution of shallow gas in the sediments and the lake bottom manifestation of seepage (e.g., pockmarks). In Lake Q, Chirp data were limited in their capacity to image deeper sediments and did not capture the thaw bulb. The failure to capture the thaw bulb at Lake Q may in part be related to the fact that the present day lake is a remnant of an older, larger, and now-partially drained lake. These suggestions are consistent with our analyses of a dated core of sediment from the lake that shows that a wetland has been present at the site of Lake Q since approximately 12,000 thousand years ago. Chemical analyses of the core indicate that the availability of methane at the site has changed during the past and is correlated with past environmental changes (i.e. temperature and hydrology) in the Arctic. Discovery of methane seeps in Lake Teshekpuk in the northernmost part of the lake during 2009 reconnaissance surveys provided a strong impetus to visit this area in 2010. The seismic methods applied in Lake Teshekpuk were able to image pockmarks, widespread shallow gas in the sediments, and the relationship among different sediment packages on the lake?s bottom, but even boomer seismics did not detect permafrost beneath the northern part of the lake. By characterizing the biogeochemistry of shallow TKL with methane seeps we showed that the radical seasonal shifts in ice cover and temperature. These seasonal environmental differences result in distinct consumption and production processes of biologically-relevant compounds. The combined effects of temperature, ice-volume and other lithological factors linked to seepage from the lake are manifest in the distribution of sedimentary methane in Lake Q during icecovered and ice-free conditions. The biogeochemistry results illustrated very active methanotrophy in TKLs. Substantial effort was subsequently made to characterize the nature of methanotrophic communities in TKLs. We applied stable isotope probing approaches to genetically characterize the methanotrophs most active in utilizing methane in TKLs. Our study is the first to identify methane oxidizing organisms active in arctic TKLs, and revealing that type I methanotrophs and type II methanotrophs are abundant and active in assimilating methane in TKLs. These organisms play an important role in limiting the flux of methane from these sites. Our investigations indicate that as temperatures increase in the Arctic, oxidation rates and active methanotrophic populations will also shift. Whether these changes can offset predicted increases in methanogenesis is an important question underlying models of future methane flux and resultant climate change. Overall our findings indicate that TKLs and their ability to act as both source and sink of methane are exceedingly sensitive to environmental change.

  6. International District Energy Association

    Broader source: Energy.gov [DOE]

    Since its formation in 1909, the International District Energy Association (IDEA) has served as a principal industry advocate and management resource for owners, operators, developers, and suppliers of district heating and cooling systems in cities, campuses, bases, and healthcare facilities. Today, with over 1,400 members in 26 countries, IDEA continues to organize high-quality technical conferences that inform, connect, and advance the industry toward higher energy efficiency and lower carbon emissions through innovation and investment in scalable sustainable solutions. With the support of DOE, IDEA performs industry research and market analysis to foster high impact projects and help transform the U.S. energy industry. IDEA was an active participant in the original Vision and Roadmap process and has continued to partner with DOE on combined heat and power (CHP) efforts across the country.

  7. American Association of Petroleum Geologists

    E-Print Network [OSTI]

    Kaufman, Alan Jay

    American Association of Petroleum Geologists 40th Eastern Section Meeting September 24-29, 2011 MEETING SPONSORS #12;2011 Eastern Section American Association of Petroleum Geologists 40th Annual Meeting

  8. National Mining Association Experimental Determination

    E-Print Network [OSTI]

    National Mining Association Experimental Determination of Radon Fluxes over Water #12;Introduction research funded by the National Mining Association (NMA) regarding radon fluxes from water surfaces surfaces at uranium recovery operations are insignificant and approximate background soil fluxes for most

  9. ARM - International Arctic Research

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Comments?govInstrumentsnoaacrn DocumentationgovInstrumentstracegasgovInstrumentsxsacrInstruments Related

  10. Acquisition Executive Associate Director for

    E-Print Network [OSTI]

    Princeton Plasma Physics Laboratory

    Acquisition Executive Associate Director for Fusion Energy Sciences E. Synakowski DOE Program Offi NSTX Program Manager Fusion Energy Sciences B. Sullivan Office DOE Site Office DOE Site Manager

  11. Arctic organic aerosol measurements show particles from mixed combustion in spring haze and from frost flowers in winter

    E-Print Network [OSTI]

    to elemental tracers of industrial pollution, biomass burning, and shipping emissions. PMF analysis associated combustion in spring haze and from frost flowers in winter P. M. Shaw,1 L. M. Russell,1 A. Jefferson,2 and P OM with two factors, a Mixed Combustion factor (MCF) and an Oceanderived factor (ODF). Back

  12. National Contract Management Association’s 2013 World Congress

    Broader source: Energy.gov [DOE]

    The National Contract Management Association (NCMA) will hold its 2013 World Congress from July 21 to July 24, 2013, in Nashville, TN. The theme for this conference is "Collaborative Contract...

  13. Potential of Diazorphic, Endophytic Bacteria Associated with...

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

    of Diazorphic, Endophytic Bacteria Associated with Sugarcane for Energycane Production Potential of Diazorphic, Endophytic Bacteria Associated with Sugarcane for Energycane...

  14. Vice President Associate Vice President

    E-Print Network [OSTI]

    Roy, Subrata

    Assistant Director for Training Interdisciplinary Projects Center & Institute Reviews Research Support Florida Energy Systems Consortium Genetics Institute Research Communications Emerging Pathogens InstituteVice President For Research Associate Vice President for Research Director of Sponsored Research

  15. Raquel Meyer Alexander Associate Professor

    E-Print Network [OSTI]

    Marsh, David

    . 2011. U.S. Congressional testimony from KU student about tax research service-learning class project.ku.edu/~katrina Used by the American Bar Association to provide tax assistance to victims. 2005. Cited in testimony

  16. associates

    National Nuclear Security Administration (NNSA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield Municipal GasAdministration Medal01 Sandia4) August 20123/%2A en46A NAME AND TITLE1/%2A

  17. Association

    National Nuclear Security Administration (NNSA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield Municipal GasAdministration Medal01 Sandia4) AugustA. Geographic Available for sale to2Order Codea

  18. Association

    National Nuclear Security Administration (NNSA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield Municipal GasAdministration Medal01 Sandia4) AugustA. Geographic Available for sale to2Order

  19. Dissecting Hydrophobic Hydration and Association

    E-Print Network [OSTI]

    Remsing, Richard C

    2015-01-01

    We use appropriately defined short ranged reference models of liquid water to clarify the different roles local hydrogen bonding, van der Waals attractions, and long ranged electrostatic interactions play in the solvation and association of apolar solutes in water. While local hydrogen bonding in- teractions dominate hydrophobic effects involving small solutes, longer ranged electrostatic and dis- persion interactions are found to be increasingly important in the description of interfacial structure around large solutes. The hydrogen bond network sets the solute length scale at which a crossover in solvation behavior between these small and large length scale regimes is observed. Unbalanced long ranged forces acting on interfacial water molecules are also important in hydrophobic association, illustrated here by analysis of the association of model methane and buckminsterfullerene solutes.

  20. Dissecting Hydrophobic Hydration and Association

    E-Print Network [OSTI]

    Richard C. Remsing; John D. Weeks

    2015-02-19

    We use appropriately defined short ranged reference models of liquid water to clarify the different roles local hydrogen bonding, van der Waals attractions, and long ranged electrostatic interactions play in the solvation and association of apolar solutes in water. While local hydrogen bonding in- teractions dominate hydrophobic effects involving small solutes, longer ranged electrostatic and dis- persion interactions are found to be increasingly important in the description of interfacial structure around large solutes. The hydrogen bond network sets the solute length scale at which a crossover in solvation behavior between these small and large length scale regimes is observed. Unbalanced long ranged forces acting on interfacial water molecules are also important in hydrophobic association, illustrated here by analysis of the association of model methane and buckminsterfullerene solutes.

  1. Intercomparison of model simulations of mixed-phase clouds observed during the ARM Mixed-Phase Arctic Cloud Experiment. Part I: Single layer cloud

    SciTech Connect (OSTI)

    Klein, S A; McCoy, R B; Morrison, H; Ackerman, A; Avramov, A; deBoer, G; Chen, M; Cole, J; DelGenio, A; Golaz, J; Hashino, T; Harrington, J; Hoose, C; Khairoutdinov, M; Larson, V; Liu, X; Luo, Y; McFarquhar, G; Menon, S; Neggers, R; Park, S; Poellot, M; von Salzen, K; Schmidt, J; Sednev, I; Shipway, B; Shupe, M; Spangenberg, D; Sud, Y; Turner, D; Veron, D; Falk, M; Foster, M; Fridlind, A; Walker, G; Wang, Z; Wolf, A; Xie, S; Xu, K; Yang, F; Zhang, G

    2008-02-27

    Results are presented from an intercomparison of single-column and cloud-resolving model simulations of a cold-air outbreak mixed-phase stratocumulus cloud observed during the Atmospheric Radiation Measurement (ARM) program's Mixed-Phase Arctic Cloud Experiment. The observed cloud occurred in a well-mixed boundary layer with a cloud top temperature of -15 C. The observed liquid water path of around 160 g m{sup -2} was about two-thirds of the adiabatic value and much greater than the mass of ice crystal precipitation which when integrated from the surface to cloud top was around 15 g m{sup -2}. The simulations were performed by seventeen single-column models (SCMs) and nine cloud-resolving models (CRMs). While the simulated ice water path is generally consistent with the observed values, the median SCM and CRM liquid water path is a factor of three smaller than observed. Results from a sensitivity study in which models removed ice microphysics indicate that in many models the interaction between liquid and ice-phase microphysics is responsible for the large model underestimate of liquid water path. Despite this general underestimate, the simulated liquid and ice water paths of several models are consistent with the observed values. Furthermore, there is some evidence that models with more sophisticated microphysics simulate liquid and ice water paths that are in better agreement with the observed values, although considerable scatter is also present. Although no single factor guarantees a good simulation, these results emphasize the need for improvement in the model representation of mixed-phase microphysics. This case study, which has been well observed from both aircraft and ground-based remote sensors, could be a benchmark for model simulations of mixed-phase clouds.

  2. Sponsors of CIEEDAC: Environment Canada, Natural Resources Canada, Aluminium Association of Canada, Automobile Parts Manufacturing Association, Brewers Association of Canada, Canadian Energy Pipeline Association, Canadian Fertilizer Institute,

    E-Print Network [OSTI]

    Sponsors of CIEEDAC: Environment Canada, Natural Resources Canada, Aluminium Association of Canada of Canada, Chemistry Industry Association of Canada, Construction Association of Canada, Forest Products)........................................................................................ 3 1.3.2 Medium Term (2-5 years

  3. JOINT CONFERENCE SOUTHERN ASSOCIATION FOR CANADIAN STUDIES

    E-Print Network [OSTI]

    Duchowski, Andrew T.

    JOINT CONFERENCE SOUTHERN ASSOCIATION FOR CANADIAN STUDIES ASSOCIATION OF QUEBEC STUDIES KENNESAW and the Association of Quebec Studies will be holding a joint conference at Kennesaw State University on April 13

  4. Semantic associative network for text analysis (SANTA) 

    E-Print Network [OSTI]

    Airhart, Robert William

    2000-01-01

    Based on theories of associations, the Semantic Associative Network for Text Analysis (SANTA) has been developed. Nodes in the network represent words and links between nodes represent the association strengths between ...

  5. History of Humanities Associate Editors

    E-Print Network [OSTI]

    Mateo, Jill M.

    History of Humanities Associate Editors Rick Altman, Film Studies, University of Iowa Carolyn History of Science and Humanities, Utrecht University David Cram, History of Linguistics, University, Max Planck Institute for the History of Science Caroline van Eck, Art and Architecture, Leiden

  6. Fusion Power Associates Annual Meeting

    E-Print Network [OSTI]

    Fusion Power Associates Annual Meeting Washington, DC 2 December 2009 R. L. McCrory Professor OMEGA (2009) OMEGA hydro-equivalent ignition Q = 2 Ignition CTF FRC Spheromak RFP ST Stellarator Tokamak to Physical Review Letters. 0 1 0 2 3 2 4 6 8 Time (ns) Three-picket NIF design Power/beam(TW) 10 12 160 nm DT

  7. Associative detachment of rubidium hydroxide

    E-Print Network [OSTI]

    Jason N. Byrd; H. Harvey Michels; John A. Montgomery Jr.; Robin Côté

    2013-07-15

    We performed calculations of the optimized structure, harmonic vibrational frequencies and dissociation energies of RbOH and its anion, and investigate the interactions between Rb and OH$^-$ leading to possible associative detachment pathways. The electron affinity of RbOH was computed to be 0.2890 eV, with a bond energy of Rb+OH$^-$ half that of Rb+OH. To determine other possible charge loss pathways, the Rb+OH and Rb+OH$^-$ dissociation curves were computed using couple cluster methods along all possible collisional angles. An adiabatic curve crossing between the neutral and charged molecule was found at the inner wall of the molecular potential curve for linear geometries. Associative detachment rates were estimated using the Langevin ion capture cross-section for hydroxide. We find for $v\\ge 2$ an associative detachment rate of $>2\\times 10^{-9}$ cm$^3$s$^{-1}$, while for $v=0$ and 1 no appreciable rate exists. This strong dependence on vibrational level suggests the ability to control the associative detachment rate directly.

  8. POLICY SUMMARY BUSINESS ASSOCIATE CONTRACTS

    E-Print Network [OSTI]

    POLICY SUMMARY BUSINESS ASSOCIATE CONTRACTS POLICY NUMBER 2003-04 To comply with HIPAA requirements PRIVACY AND SECURITY POLICY NUMBER 2003-07 To identify the mechanism by which appropriate staff receives policies related to security and privacy of protected health information. BREACHES OF PRIVACY & SECURITY

  9. HUTTON NAMED NMFS ASSOCIATE DIRECTOR

    E-Print Network [OSTI]

    for Resource Utilization, has been named Associate Director. His responsibilities embrace: economic Society of Heating, Refrigeration and Air Conditioning Engineers, and Th International Institute both sides. " orking meetmgs followed on Nov. 22-23 to summarize details for reports. The meeting

  10. Geothermal Energy Association Recognizes the National Geothermal...

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

    Geothermal Energy Association Recognizes the National Geothermal Data System Geothermal Energy Association Recognizes the National Geothermal Data System July 29, 2014 - 8:20am...

  11. Electrolyte Solvation and Ionic Association. VI. Acetonitrile...

    Office of Scientific and Technical Information (OSTI)

    Electrolyte Solvation and Ionic Association. VI. Acetonitrile-Lithium Salt Mixtures: Highly Associated Salts Revisited Citation Details In-Document Search Title: Electrolyte...

  12. Known Challenges Associated with the Production, Transportation...

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

    Known Challenges Associated with the Production, Transportation, Storage and Usage of Pyrolysis Oil in Residential and Industrial Settings Known Challenges Associated with the...

  13. American Gas Association | Department of Energy

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

    American Gas Association American Gas Association Memorandum Summarizing Ex Parte Communication 111011ExParte.pdf More Documents & Publications Ex Parte Memorandum - Natural...

  14. Native American Finance Officers Association Conference | Department...

    Office of Environmental Management (EM)

    Native American Finance Officers Association Conference Native American Finance Officers Association Conference March 5, 2012 - 5:50pm Addthis This event will take place on March...

  15. QER - Comment of Electric Drive Transportation Association |...

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

    Drive Transportation Association QER - Comment of Electric Drive Transportation Association From: Genevieve Cullen gcullen@electricdrive.org Sent: Friday, October 10, 2014 11:58...

  16. National Electrical Manufacturers Association (NEMA) Response...

    Office of Environmental Management (EM)

    Electrical Manufacturers Association (NEMA) Response to Smart Grid RFI National Electrical Manufacturers Association (NEMA) Response to Smart Grid RFI The National Electrical...

  17. Energy Department, Northwest Food Processors Association Set...

    Energy Savers [EERE]

    Department, Northwest Food Processors Association Set Energy Efficiency Goals for Industry Energy Department, Northwest Food Processors Association Set Energy Efficiency Goals for...

  18. Preliminary Notice of Violation, Brookhaven Science Associates...

    Office of Environmental Management (EM)

    Brookhaven Science Associates, LLC - WEA-2013-01 Preliminary Notice of Violation, Brookhaven Science Associates, LLC - WEA-2013-01 August 29, 2013 Issued to Brookhaven Science...

  19. Parameterization of the Extinction Coefficient in Ice and Mixed-Phase Arctic Clouds during the ISDAC Field Campaign

    SciTech Connect (OSTI)

    Korolev, A; Shashkov, A; Barker, H

    2012-03-06

    This report documents the history of attempts to directly measure cloud extinction, the current measurement device known as the Cloud Extinction Probe (CEP), specific problems with direct measurement of extinction coefficient, and the attempts made here to address these problems. Extinction coefficient is one of the fundamental microphysical parameters characterizing bulk properties of clouds. Knowledge of extinction coefficient is of crucial importance for radiative transfer calculations in weather prediction and climate models given that Earth's radiation budget (ERB) is modulated much by clouds. In order for a large-scale model to properly account for ERB and perturbations to it, it must ultimately be able to simulate cloud extinction coefficient well. In turn this requires adequate and simultaneous simulation of profiles of cloud water content and particle habit and size. Similarly, remote inference of cloud properties requires assumptions to be made about cloud phase and associated single-scattering properties, of which extinction coefficient is crucial. Hence, extinction coefficient plays an important role in both application and validation of methods for remote inference of cloud properties from data obtained from both satellite and surface sensors (e.g., Barker et al. 2008). While estimation of extinction coefficient within large-scale models is relatively straightforward for pure water droplets, thanks to Mie theory, mixed-phase and ice clouds still present problems. This is because of the myriad forms and sizes that crystals can achieve, each having their own unique extinction properties. For the foreseeable future, large-scale models will have to be content with diagnostic parametrization of crystal size and type. However, before they are able to provide satisfactory values needed for calculation of radiative transfer, they require the intermediate step of assigning single-scattering properties to particles. The most basic of these is extinction coefficient, yet it is rarely measured directly, and therefore verification of parametrizations is difficult. The obvious solution is to be able to measure microphysical properties and extinction at the same time and for the same volume. This is best done by in situ sampling by instruments mounted on either balloon or aircraft. The latter is the usual route and the one employed here. Yet the problem of actually measuring extinction coefficient directly for arbitrarily complicated particles still remains unsolved.

  20. SCHE Helium bottles and associated isolation valves

    SciTech Connect (OSTI)

    VAN KATWIJK, C.

    2000-06-21

    These gas bottles and associated valves provide the safety grade helium source for emergency MCO purge.

  1. Short Papers___________________________________________________________________________________________________ Mining Multiple-Level Association

    E-Print Network [OSTI]

    Wu, Xindong

    ___________________________________________________________________________________________________ Mining Multiple-Level Association Rules in Large Databases Jiawei Han, Member, IEEE Computer Society for efficient mining of multiple-level association rules from large transaction databases based on the Apriori. Index TermsÐData mining, knowledge discovery in databases, association rules, multiple-level association

  2. QER- Comment of Northeast Gas Association

    Office of Energy Efficiency and Renewable Energy (EERE)

    Please find enclosed comments of the Northeast Gas Association regarding the Quadrennial Energy Review. Thank you.

  3. ARM - Ingest Associated Status Reports

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Comments? WeDatastreamstps DocumentationAtlanticENAField ParticipantsField CampaignPlainsInformationAssociated

  4. Camroden Associates | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoopButte County,Camilla, Georgia: Energy Resources Jump to:Camroden Associates Jump

  5. Principal Associate Director - Global Security

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation of Fe(II) by Carbon-Rich Matrices in HydrothermalMagneticAiterPrincipal Associate

  6. Figure 6. Projected Production for the Low Development Rate of...

    U.S. Energy Information Administration (EIA) Indexed Site

    6. Projected Production for the Low Development Rate of Technically Recoverable Oil Estimated at 5 Percent, Mean, and 95 Percent Probabilities for the ANWR Coastal Plain of the...

  7. Management -Professional Associations American Management Association (AMA) : The AMA provides trainings and valuable resources to

    E-Print Network [OSTI]

    Management - Professional Associations American Management Association (AMA) : The AMA provides and experience. The Society for Human Resource Management (SHRM): SHRM is the world's largest association, dedicated to serving the needs of Human Resource Management Professionals. National Human Resources

  8. QER- Comment of Canadian Gas Association

    Broader source: Energy.gov [DOE]

    SENT ON BEHALF OF TIMOTHY M. EGAN PRESIDENT AND CEO CANADIAN GAS ASSOCIATION Dear Quadrennial Energy Review Task Force, Please find attached the submission from the Canadian Gas Association to the Quadrennial Energy Review (QER) process.

  9. Copyright Association for Investment Management Research. Reproduced

    E-Print Network [OSTI]

    Copyright Association for Investment Management Research. Reproduced republished Benchmarks Attribution permission Association for Investment Management All ©2001, ® www.aimr.org . Toward Agent because investors demand liquidity, a market makers. Market aversion, means positions, off­load

  10. Alternative Fuel Infrastructure Associate Location: San Diego

    E-Print Network [OSTI]

    California at Davis, University of

    Alternative Fuel Infrastructure Associate Location: San Diego Basic Functions Center an Alternative Fuel Infrastructure Associate that has a passion for sustainability, the environment, and accelerating the transition to a sustainable world powered by clean energy! The Alternative Fuel Infrastructure

  11. QER- Comment of Geotherman Energy Association (GEA)

    Broader source: Energy.gov [DOE]

    Hi the Geothermal Energy Association would like to submit the attached comments for the 2014 QER process. Thanks,

  12. National Science Teachers Association Annual Conference

    Broader source: Energy.gov [DOE]

    The National Science Teachers Association annual conference was held in Chicago, Illinois, from March 12–15, 2015.

  13. Periods Associated to Algebraic Cycles Spencer Bloch

    E-Print Network [OSTI]

    Bloch, Spencer

    K0(X) = CHp (X)Q Spencer Bloch () Periods Associated to Algebraic Cycles March 3, 2014 Albert) CHp(X, n) := H-n(Zp(X, ·)). Spencer Bloch () Periods Associated to Algebraic Cycles March 3, 2014 ) - Zp (X) CHp(X, n) := H-n(Zp(X, ·)). Spencer Bloch () Periods Associated to Algebraic Cycles March 3

  14. Truman State University Alumni Association Strategic Plan

    E-Print Network [OSTI]

    Gering, Jon C.

    1 Truman State University Alumni Association Strategic Plan 2012 ­ 2016 maximum impact, a Strategic Plan is necessary to guide and shape the Association's activities. The Association Board of Directors adopted the first Strategic Plan in 2008. This second edition marks a thorough

  15. Mining Weighted Association Rules without Preassigned Weights

    E-Print Network [OSTI]

    Bai, Fengshan

    Mining Weighted Association Rules without Preassigned Weights Ke Sun and Fengshan Bai Abstract--Association rule mining is a key issue in data mining. However, the classical models ignore the difference between the transactions, and the weighted association rule mining does not work on databases with only binary attributes

  16. Code of Official Conduct Student Government Association

    E-Print Network [OSTI]

    Long, Nicholas

    Code of Official Conduct Student Government Association Stephen F. Austin State University Section, the Student Government Association of Stephen F. Austin State University has adopted this Code of Official Association officials who may be elected, appointed, or employed comply with both the Letter and the Spirit

  17. Arctic Microclimate Activity.doc

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 OutreachProductswsicloudwsiclouddenDVA N C E D B L O O D SFederal8823 Revision 02August 1, Lower

  18. Comments on: Arctic Climate Measurements

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room News PublicationsAuditsCluster Compatibility Mode ClusterProteinReactions | Argonne

  19. OPEN HOUSE - Climate Prisms: Arctic

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass map shinesSolarNewsusceptometer under pressureNavyNumericalOLSU/CAMD ProcedureOPEN

  20. Sandia Energy - Arctic Climate Measurements

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail.Theory ofDid youOxygen GenerationTechnologies |Education STEMA

  1. ARM - Arctic Meetings of Interest

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail.TheoryTuesday, August 10, 20102016Study (CHAPS)Archive Campaign Details

  2. Arctic Solar | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental Jump to:EAandAmminex A S JumpArchuleta County, Colorado: Energy ResourcesArctasSolar

  3. Case Study - National Rural Electric Cooperative Association...

    Office of Environmental Management (EM)

    National Rural Electric Cooperative Association Smart Grid Investment Grant 1 Helping America's Electric Cooperatives Build a Smarter Grid to Streamline Operations and Improve...

  4. Valley Electric Association- Solar Water Heating Program

    Office of Energy Efficiency and Renewable Energy (EERE)

    Valley Electric Association (VEA), a nonprofit member owned cooperative, developed the domestic solar water heating program to encourage energy efficiency at the request of the membership. VEA...

  5. Spanish Association for the Internationalisation and Innovation...

    Open Energy Info (EERE)

    Jump to: navigation, search Name: Spanish Association for the Internationalisation and Innovation of Solar Companies Place: Spain Sector: Solar Product: Barcelona-based...

  6. Conventional Energy Forum & Associated Vertical Business Development...

    Office of Environmental Management (EM)

    & Casino The Office of Indian Energy Tribal Leader Energy Forum on "Conventional Energy (Oil, Gas, and Coal) Forum & Associated Vertical Business Development: Best Practices in...

  7. Consent Order, Brookhaven Science Associates, LLC | Department...

    Energy Savers [EERE]

    Consent Order issued to Brookhaven Science Associates, LLC relating to an electrical shock event that occurred at the Brookhaven National Laboratory. On November 23,...

  8. Update on HHV-8-Associated Malignancies

    E-Print Network [OSTI]

    Sunil, Meena; Reid, Erin; Lechowicz, Mary Jo

    2010-01-01

    herpesvirus-associated oncogenesis. Semin Cancer Biol 2008,molecular biology and oncogenesis. Cancer Lett 2009 (Epubof KS. induced oncogenesis, the reader is referred to Liang

  9. Induced seismicity associated with enhanced geothermal system

    E-Print Network [OSTI]

    Majer, Ernest L.

    2006-01-01

    The deep EGS (Enhanced Geothermal System) project at Soultz-associated with enhanced geothermal systems. Geothermalfor a long-lived enhanced geothermal system (EGS) in the

  10. Golden Valley Electric Association - Sustainable Natural Alternative...

    Broader source: Energy.gov (indexed) [DOE]

    Gas Tidal Wave Wind (Small) Hydroelectric (Small) Maximum Rebate 1.50kWh Program Info Sector Name Utility Administrator Golden Valley Electric Association Website http:...

  11. ABSTRACT OF THESIS LINE ASSOCIATIVE REGISTERS

    E-Print Network [OSTI]

    Dietz, Henry G. "Hank"

    ABSTRACT OF THESIS LINE ASSOCIATIVE REGISTERS As technological advances have improved processor. This thesis takes the approach of trying to create a new memory access model that is more efficient and simple ASSOCIATIVE REGISTERS By Krishna Melarkode Dr. Henry G. Dietz (Director of Thesis) Dr. Yu Ming Zhang (Director

  12. Roadmap: Associate of Arts Regional College

    E-Print Network [OSTI]

    Sheridan, Scott

    Roadmap: Associate of Arts [RE-AA-AA] Regional College Catalog Year: 2012-2013 Page 1 of 2 | Last Updated: 12-Mar-12/LNHD This roadmap is a recommended semester-by-semester plan of study for this major GPA Overall GPA 61 2.000 2.000 #12;Roadmap: Associate of Arts [RE-AA-AA] Regional College Catalog Year

  13. Roadmap: Associate of Arts Regional College

    E-Print Network [OSTI]

    Sheridan, Scott

    Roadmap: Associate of Arts [RE-AA-AA] Regional College Catalog Year: 2013-2014 Page 1 of 2 | Last Updated: 27-Feb-13/LNHD This roadmap is a recommended semester-by-semester plan of study for this major.000 #12;Roadmap: Associate of Arts [RE-AA-AA] Regional College Catalog Year: 2013-2014 Page 2 of 2 | Last

  14. Roadmap: Associate of Science Regional College

    E-Print Network [OSTI]

    Sheridan, Scott

    Roadmap: Associate of Science [RE-AS-AS] Regional College Catalog Year: 2013-2014 Page 1 of 2 | Last Updated: 27-Feb-13/LNHD This roadmap is a recommended semester-by-semester plan of study.000 #12;Roadmap: Associate of Science [RE-AS-AS] Regional College Catalog Year: 2013-2014 Page 2 of 2

  15. Roadmap: Associate of Science Regional College

    E-Print Network [OSTI]

    Sheridan, Scott

    Roadmap: Associate of Science [RE-AS-AS] Regional College Catalog Year: 2012-2013 Page 1 of 2 | Last Updated: 12-Mar-12/LNHD This roadmap is a recommended semester-by-semester plan of study GPA Overall GPA 61 2.000 2.000 #12;Roadmap: Associate of Science [RE-AS-AS] Regional College Catalog

  16. Assistant or Associate Professor in Sedimentology

    E-Print Network [OSTI]

    Assistant or Associate Professor in Sedimentology The Department of Earth Sciences (DES), Mineral for a tenure-track Assistant or Associate Professor position in Sedimentology to begin in July 2015. We seek an innovative individual with excellent teaching and research skills in sedimentology. Expertise in Precambrian

  17. TAIWAN INTERNATIONAL GRADUATE PROGRAM GRADUATE STUDENT ASSOCIATION

    E-Print Network [OSTI]

    TAIWAN INTERNATIONAL GRADUATE PROGRAM GRADUATE STUDENT ASSOCIATION (TIGP-GSA) GRADUATE STUDENT, 128 ACADEMIA ROAD, SECTION 2, NANKANG, TAIPEI 115, TAIWAN, R. O. C. Email: gsa.tigp@gmail.com; Website: http://gsa.tigp.sinica.edu.tw/ ABOUT TIGP GRADUATE STUDENT ASSOCIATION (TIGP GSA) Introduction Taiwan

  18. Fact Sheet: DOE/National Association of Regulatory Utility Commissione...

    Energy Savers [EERE]

    DOENational Association of Regulatory Utility Commissioners Natural Gas Infrastructure Modernization Partnership Fact Sheet: DOENational Association of Regulatory Utility...

  19. Nonlinear mechanics of thermoreversibly associating dendrimer glasses

    E-Print Network [OSTI]

    Arvind Srikanth; Robert S. Hoy; Berend C. Rinderspacher; Jan W. Andzelm

    2013-08-06

    We model the mechanics of associating trivalent dendrimer network glasses with a focus on their energy dissipation properties. Various combinations of sticky bond (SB) strength and kinetics are employed. The toughness (work-to-fracture) of these systems displays a surprising deformation-protocol dependence; different association parameters optimize different properties. In particular, "strong, slow" SBs optimize strength, while "weak, fast" SBs optimize ductility via self-healing during deformation. We relate these observations to breaking, reformation, and partner-switching of SBs during deformation. These studies point the way to creating associating-polymer network glasses with tailorable mechanical properties.

  20. Testing non-associative quantum mechanics

    E-Print Network [OSTI]

    Bojowald, Martin; Buyukcam, Umut

    2015-01-01

    The familiar concepts of state vectors and operators in quantum mechanics rely on associative products of observables. However, these notions do not apply to some exotic systems such as magnetic monopoles, which have long been known to lead to non-associative algebras. Their quantum physics has remained obscure. This letter presents the first derivation of potentially testable physical results in non-associative quantum mechanics, based on effective potentials. They imply new effects which cannot be mimicked in usual quantum mechanics with standard magnetic fields.

  1. Associate Vice President Facilities Planning & Operations

    E-Print Network [OSTI]

    Kostic, Milivoje M.

    ) Building Automation Technician Facilities Manager Monsanto Interim Director Physical Plant Associate II Supervisor Building Services (East Campus) Office Manager Inventory Specialist Building Services Sub-Forman (5) Equipment Services Worker (3) Building Services Worker (66) Building Services Worker

  2. Architecture Associated with Veterinary Education in Edinburgh 

    E-Print Network [OSTI]

    Warwick, Colin M; Macdonald, Alastair A

    The Royal (Dick) School of Veterinary Studies, (the Dick Vet), has been part of Edinburgh's history for over 10 years. However, it is not generally realised that the city has had a longer association with veterinary medicine, ...

  3. EXCEPTIONAL BUNDLES ASSOCIATED TO DEGENERATIONS OF SURFACES

    E-Print Network [OSTI]

    Hacking, Paul

    EXCEPTIONAL BUNDLES ASSOCIATED TO DEGENERATIONS OF SURFACES PAUL HACKING 1. Introduction In 1981 J HACKING F deforms in a unique way to a family of exceptional bundles on the fibers of Y/(0 S). Theorem 1

  4. Sequentially Triggered Star Formation in OB Associations

    E-Print Network [OSTI]

    Thomas Preibisch; Hans Zinnecker

    2006-10-27

    We discuss observational evidence for sequential and triggered star formation in OB associations. We first review the star formation process in the Scorpius-Centaurus OB association, the nearest OB association to the Sun, where several recent extensive studies have allowed us to reconstruct the star formation history in a rather detailed way. We then compare the observational results with those obtained for other OB associations and with recent models of rapid cloud and star formation in the turbulent interstellar medium. We conclude that the formation of whole OB subgroups (each consisting of several thousand stars) requires large-scale triggering mechanisms such as shocks from expanding wind and supernova driven superbubbles surrounding older subgroups. Other triggering mechanisms, like radiatively driven implosion of globules, also operate, but seem to be secondary processes, forming only small stellar groups rather than whole OB subgroups with thousands of stars.

  5. GREEN FUNCTIONS ASSOCIATED TO COMPLEX REFLECTION GROUPS

    E-Print Network [OSTI]

    Shoj, Toshiaki

    P describe Green functions QO(u)* *). Note that the matrix is completely determined GREEN FUNCTIONS ASSOCIATED TO COMPLEX REFLECTION GROUPS University of Tokyo Noda, Chiba 278-8510, Japan Abstract. Green functions

  6. Associate of Science Degree in Psychosocial Rehabilitation

    E-Print Network [OSTI]

    Delgado, Mauricio

    Associate of Science Degree in Psychosocial Rehabilitation Bachelor of Science Degree in Psychiatric Rehabilitation and Psychology exclusively dedicated to healthcare state-of-the-art equipment Rehabilitation and Counseling Professions SHRP School of Health Related Professions Quick Links: Description

  7. Chinese American Faculty Association of Southern California

    E-Print Network [OSTI]

    Chang, Tu-nan

    Chinese American Faculty Association of Southern California CAFA Fall Picnic Date: October 27 picnic. Sincerely, Andy Yao Cindy Fang President, CAFA Vice-President, CAFA #12;Chinese American Faculty

  8. QER- Comment of National Propane Gas Association

    Broader source: Energy.gov [DOE]

    Ladies and Gentlemen: Please find attached the QER comments of the National Propane Gas Association. Please feel to contact us if we can provide further information. Thank you for your attention to our submission.

  9. CHAPTER DEVELOPMENT HANDBOOK Alumni Association Chapter Handbook

    E-Print Network [OSTI]

    0 CHAPTER DEVELOPMENT HANDBOOK MARCH 2012 #12;1 Alumni Association Chapter Handbook St. Francis scholarships or campus renewal. The StFX Alumni Chapter Handbook will help ensure Chapters across the globe

  10. Associate Professor Department of Mathematical Sciences

    E-Print Network [OSTI]

    Li, Jing

    ­August, 2006 July­August, 2007 Visiting Research Associate Institute for Computational and Mathematical Engineering, Stanford University. Research Interests: Numerical Analysis, Scientific Computing, Numerical PDEs, Parallel Computation. 1 #12;Grants: · A Conference on New Frontiers in Numerical Analysis and Scientific

  11. Ris-R-1579(EN) Association Euratom -

    E-Print Network [OSTI]

    : Association Euratom - Risø National Laboratory Annual Progress Report 2005 Department: Optics and Plasma Research Department Risø-R-1579(EN) November 2006 ISSN 0106-2840 ISSN 1901-3922 ISSN 1396-3449 ISBN 87

  12. Successful Cooperative Cotton Gin Associations in Texas. 

    E-Print Network [OSTI]

    Paulson, W. E. (William E.)

    1943-01-01

    membership education. general -ations. ons for Childress Farmers' Cooperat.iv@ Society The members of the Childress Farmers' cooperative Society hare rea- sons to be proud of the accomplishments of their association. During the 20 seasons 1922 to 1941...

  13. Bhagu Chahar Associate Professor, Department of

    E-Print Network [OSTI]

    Chahar, B. R.

    Bhagu Chahar Associate Professor, Department of Civil Engineering, Indian Institute of Technology trapezoidal canal sections B. R. Chahar PhD, FISH, MIE, MIWRS, MIAH and S. Basu MTech Optimal design equations

  14. Postdoctoral Association Weekly Bulletin Biological Sciences Division

    E-Print Network [OSTI]

    welcome! Sponsored by the BSD Office of Graduate and Postdoctoral Affairs and the Postdoctoral Association and Refreshments provided by the Office of Graduate and Postdoctoral Affairs mining in the clo

  15. Association For Neurologically Impaired Children Web Newsletter

    E-Print Network [OSTI]

    Kraus, Nina

    Association For Neurologically Impaired Children Web Newsletter www.afniconline.org Year 2005 of life, such as home, social settings, school or work. #12;Year 2005 in review pt. 1 Web Newsletter page

  16. Costs Associated With Propane Vehicle Fueling Infrastructure

    SciTech Connect (OSTI)

    Smith, M.; Gonzales, J.

    2014-08-05

    This document is designed to help fleets understand the cost factors associated with propane vehicle fueling infrastructure. It provides an overview of the equipment and processes necessary to develop a propane fueling station and offers estimated cost ranges.

  17. Costs Associated With Propane Vehicle Fueling Infrastructure

    SciTech Connect (OSTI)

    Smith, M.; Gonzales, J.

    2014-08-01

    This document is designed to help fleets understand the cost factors associated with propane vehicle fueling infrastructure. It provides an overview of the equipment and processes necessary to develop a propane fueling station and offers estimated cost ranges.

  18. American Evaluation Association Guiding Principles for Evaluators

    SciTech Connect (OSTI)

    None

    2009-01-18

    Five principles developed by American Evaluation Associ intended to guide professional practice of evaluators & to inform evaluation clients and the general public about principles they can expect to be upheld by professional evaluators.

  19. Auto-associative nanoelectronic neural network

    SciTech Connect (OSTI)

    Nogueira, C. P. S. M.; Guimarães, J. G. [Departamento de Engenharia Elétrica - Laboratório de Dispositivos e Circuito Integrado, Universidade de Brasília, CP 4386, CEP 70904-970 Brasília DF (Brazil)

    2014-05-15

    In this paper, an auto-associative neural network using single-electron tunneling (SET) devices is proposed and simulated at low temperature. The nanoelectronic auto-associative network is able to converge to a stable state, previously stored during training. The recognition of the pattern involves decreasing the energy of the input state until it achieves a point of local minimum energy, which corresponds to one of the stored patterns.

  20. Associative memory in phasing neuron networks

    SciTech Connect (OSTI)

    Nair, Niketh S [ORNL; Bochove, Erik J. [United States Air Force Research Laboratory, Kirtland Air Force Base; Braiman, Yehuda [ORNL

    2014-01-01

    We studied pattern formation in a network of coupled Hindmarsh-Rose model neurons and introduced a new model for associative memory retrieval using networks of Kuramoto oscillators. Hindmarsh-Rose Neural Networks can exhibit a rich set of collective dynamics that can be controlled by their connectivity. Specifically, we showed an instance of Hebb's rule where spiking was correlated with network topology. Based on this, we presented a simple model of associative memory in coupled phase oscillators.

  1. Association of scattering matrices in quantum networks

    SciTech Connect (OSTI)

    Almeida, F.A.G.; Macêdo, A.M.S.

    2013-06-15

    Algorithms based on operations that associate scattering matrices in series or in parallel (analogous to impedance association in a classical circuit) are developed here. We exemplify their application by calculating the total scattering matrix of several types of quantum networks, such as star graphs and a chain of chaotic quantum dots, obtaining results with good agreement with the literature. Through a computational-time analysis we compare the efficiency of two algorithms for the simulation of a chain of chaotic quantum dots based on series association operations of (i) two-by-two centers and (ii) three-by-three ones. Empirical results point out that the algorithm (ii) is more efficient than (i) for small number of open scattering channels. A direct counting of floating point operations justifies quantitatively the superiority of the algorithm (i) for large number of open scattering channels.

  2. Nowzari et al. Habitat Associations of Persian Wild Ass in Iran HABITAT ASSOCIATIONS OF PERSIAN WILD

    E-Print Network [OSTI]

    Rubenstein, Daniel I.

    25 Nowzari et al. · Habitat Associations of Persian Wild Ass in Iran HABITAT ASSOCIATIONS OF PERSIAN WILD ASS (EQUUS HEMIONUS ONAGER) IN QA- TROUYEH NATIONAL PARK, IRAN HANIYEH NOWZARI, Department of Environment, Abadeh Branch, Islamic Azad University, Abadeh, Iran. Address: No.475, 90 alley, Ghasrodasht Av

  3. Ed Synakowski Associate Director, Office of Science

    E-Print Network [OSTI]

    Ed Synakowski Associate Director, Office of Science Fusion Energy Sciences The charge for advice on strategic planning Presented to FESAC April 9, 2014 http://science.energy.gov/fes #12;The Office of Science, and pulse lengths; · Discovery Plasma Science ­ the study of laboratory plasmas and the high energy density

  4. Nico Larco, AIA Associate Professor of Architecture

    E-Print Network [OSTI]

    Nico Larco, AIA Associate Professor of Architecture Affiliated Faculty, Department of Planning of Oregon EDUCATION University of California, Berkeley Master of Architecture, 2001 Master of City Planning (in Urban Design), 2001 Cornell University, Ithaca, New York Bachelor of Architecture, 1996. Bachelor

  5. Fathi H. Ghorbel1 Associate Professor

    E-Print Network [OSTI]

    . No definite understanding of the mechanism of kinematic error as well as its characterization is available of this paper offer a new perspective in the understanding of the mechanism of kinematic errorFathi H. Ghorbel1 Associate Professor Prasanna S. Gandhi Graduate Student Department of Mechanical

  6. Designing asymmetric neural networks with associative memory

    SciTech Connect (OSTI)

    Zhao Hong [Department of Physics, Xiamen University, Xiamen 361005 (China)

    2004-12-01

    A strategy for designing asymmetric neural networks of associative memory with controllable degree of symmetry and controllable basins of attraction is presented. It is shown that the performance of the networks depends on the degree of the symmetry, and by adjusting the degree of the symmetry the spurious memories or unwanted attractors can be suppressed completely.

  7. Identifying Risk Groups Associated with Colorectal Cancer

    E-Print Network [OSTI]

    Jin, Huidong "Warren"

    Identifying Risk Groups Associated with Colorectal Cancer Jie Chen1 , Hongxing He1 , Huidong Jin1 of identifying and describing risk groups for colorectal cancer (CRC) from population based administrative health are applied to the colorectal cancer patients' profiles in contrast to background pa- tients' profiles

  8. Fusion Power Associates 34th Annual Meeting

    E-Print Network [OSTI]

    Fusion Power Associates 34th Annual Meeting Washington, DC 11 December 2013 Perspectives Laser power ~ EL Pulse length ~ EL Mass fuel ~ EL 1/3 1/3 1/3 2/3 Performance metrics include Px (atm, 165001 (2010). **R. Betti, "Theory of Ignition and Hydro-Equivalence for Inertial Confinement Fusion

  9. Dr Eugenio Carminati Associate Professor (Structural Geology)

    E-Print Network [OSTI]

    Dr Eugenio Carminati Associate Professor (Structural Geology) room 216 ph: +39 0649914950 fax a degree in Geological Sciences at the University of Milano with a thesis in Structural Geology. I achieved. I'm fellow of the Geological Society of Italy and of the American Geophysical union. Between 2004

  10. IGOR KOPYLOV Associate Professor of Economics

    E-Print Network [OSTI]

    Al Faruque, Mohammad Abdullah

    IGOR KOPYLOV Associate Professor of Economics University of California, Irvine SSPA 3177, Social · Visiting Lecturer, New Economic School, Moscow, spring 2002 EDUCATION · University of Rochester, Ph.D. in Economics, October 2003 Thesis: 'Essays on Subjective Probability, Risk, and Ambiguity', supervised by L

  11. Edmund Synakowski Associate Director, Office of Science

    E-Print Network [OSTI]

    Edmund Synakowski Associate Director, Office of Science Fusion Energy Sciences FES Update on Strategic Planning FESAC Meeting March 12, 2015 #12;2 For this talk Mission The mission of the Fusion Energy and densities and to build the scientific foundations needed to develop a fusion energy source

  12. Ed Synakowski Associate Director, Office of Science

    E-Print Network [OSTI]

    Ed Synakowski Associate Director, Office of Science Fusion Energy Sciences FES Update and the FY 2015 Budget Proposal Presented to FESAC April 9, 2014 http://science.energy.gov/fes #12;Welcome In recognition of 24 years of dedicated service as the Federal representative to the Fusion Energy Sciences

  13. Aleutian Pribilof Islands Association- 2010 Project

    Office of Energy Efficiency and Renewable Energy (EERE)

    The Aleutian Pribilof Islands Association, Inc. (APIA) will conduct on-site weatherization and energy conservation education and a home energy and safety review in the communities of Akutan, Atka, False Pass, King Cove, Nelson Lagoon, Nikolski, Sand Point, St. George, St. Paul, and Unalaska.

  14. APRU: Association of Pacific Rim Universities

    E-Print Network [OSTI]

    Takada, Shoji

    No. 549 KYOT O UNIVER SITY FO UN D E D #12;APRU: Association of Pacific Rim Universities APRU APRU Downturn Environment and Development: Scien- tific, Social and Technological Challenges for the Pacific Rim for the Next Century in the Pacific Rim Global Pressures, Local Impacts: Challenge for the Pacific Rim APEC

  15. Original article Blue-stain fungi associated

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Original article Blue-stain fungi associated with Tomicus piniperda in Sweden and preliminary to determine the development of blue-staining of sapwood. Fungi were isolated from samples of inner bark and blue-stained sapwood in connection with galleries of T piniperda. Samples were also taken from beetle

  16. Energy Balance and Emissions Associated with Biochar

    E-Print Network [OSTI]

    Lehmann, Johannes

    emissions of optimizing a slow pyrolysis-based bioenergy system for biochar and energy production rather pyrolysis systems produce some char as a product. In this paper we refer to this material as biochar (whichEnergy Balance and Emissions Associated with Biochar Sequestration and Pyrolysis Bioenergy

  17. The associate of science degree in petroleum

    E-Print Network [OSTI]

    Sibille, Etienne

    The associate of science degree in petroleum technology trains students in becoming a qualified petroleum technologist in Pennsylvania and beyond. The newly modified program in petroleum technology and national petroleum industry. Petroleum technology majors at Pitt-Bradford take courses in Petroleum

  18. YiuKai Dennis Ng Associate Professor

    E-Print Network [OSTI]

    Seamons, Kent E.

    VITAE Yiu­Kai Dennis Ng Associate Professor 3322 TMCB Computer Science Department December 2, 2013. Publications . Journals 1. Maria Soledad Pera and Yiu­Kai Ng, ``Exploiting the Wisdom of Social Connec­ tions Information Systems (JIIS), Springer, 2014. (Category 2) 2. Rani Qumsiyeh and Yiu­Kai Ng, ``Assisting Web

  19. Yiu-Kai Dennis Ng Associate Professor

    E-Print Network [OSTI]

    Seamons, Kent E.

    VITAE Yiu-Kai Dennis Ng Associate Professor 3322 TMCB Computer Science Department December 2, 2013. Publications · Journals 1. Maria Soledad Pera and Yiu-Kai Ng, "Exploiting the Wisdom of Social Connec- tions Information Systems (JIIS), Springer, 2014. (Category 2) 2. Rani Qumsiyeh and Yiu-Kai Ng, "Assisting Web

  20. FUSION POWER ASSOCIATES Annual Meeting and Symposium

    E-Print Network [OSTI]

    Agenda FUSION POWER ASSOCIATES 35TH Annual Meeting and Symposium Fusion Energy: Recent Progress Fusion and the Road Ahead 12:50 The Magnetic Fusion Program in Korea ­ G.S. Lee, Korea 1:10 The Magnetic Fusion Program in China ­ Yuanxi Wan, China 1:30 The Magnetic Fusion Program in Europe ­ Tony Donne, EuroFusion

  1. Polynomial over Associative D-Algebra

    E-Print Network [OSTI]

    Aleks Kleyn

    2015-04-12

    In the paper I considered algebra of polynomials over associative D-algebra with unit. Using the tensor notation allows to simplify the representation of polynomial. I considered questions related to divisibility of polynomial of any power over polynomial of power 1.

  2. Oklahoma Sheriffs' Association Ok ahoma Sheriff

    E-Print Network [OSTI]

    Harms, Kyle E.

    Oklahoma Sheriffs' Association Ok ahoma Sheriff The Official Magazine for Oklahoma Sher iffs was recently developed by the Oklahoma Office of Homeland Security (OKOHS), Oklahoma Council on Law Enforcement the current credentialing system already implemented in the state of Oklahoma. In addition to obtaining

  3. Stimulus exposure effects in human associative learning

    E-Print Network [OSTI]

    Gluck, Mark

    Stimulus exposure effects in human associative learning Catherine E. Myers Rutgers University, Newark, NJ, U.S.A. Lindsay M. Oliver Glasgow Caledonian University, Glasgow, U.K. Stacey G. Warren should be sent to Catherine E. Myers, Department of Psychology, Rutgers University, Newark, NJ 07102, U

  4. Introduction Risk associated with an adverse price

    E-Print Network [OSTI]

    O'Laughlin, Jay

    Introduction Risk associated with an adverse price change (price risk) is a normal part commodities are sold suggests price risk is an unavoidable part of being involved in the industry. Producers that have significant price variability. Recent domestic farm policy changes and trade barrier reductions

  5. Ray Trygstad Associate Chair, Department of

    E-Print Network [OSTI]

    Heller, Barbara

    Ray Trygstad Associate Chair, Department of Information Technology and Management Date: 3.27.15 From: Ray Trygstad To: Information Technology and Management Students and Faculty Subj: Information Technology and Management Curriculum Revisions The following revisions to curricula in Information Technology

  6. Postdoctoral Association Weekly Bulletin Biological Sciences Division

    E-Print Network [OSTI]

    and conflicts of interest. The postdoctoral association seminar committee is planning more ethics seminars The Rockefeller University Investigator, Howard Hughes Medical Institute 5:00-6:00 pm Reception, Annual PDA Survey ----------------------------------------------------------------------- The annual BSD PDA Survey is NOW OPEN until MARCH 7 This is an excellent opportunity to give the BSD

  7. Lester Baker Perry Associate Professor of Geography

    E-Print Network [OSTI]

    Lester Baker Perry Associate Professor of Geography Department of Geography & Planning Appalachian, NC 28608 USA EDUCATION University of North Carolina, Chapel Hill, NC, 2003-2006 Ph.D. in Geography in the Southern Appalachians Appalachian State University, Boone, NC, 1996-1998 M.A. in Geography ­ May 1998

  8. Chancellor Water Colloids: Characterization and Radionuclide Association

    SciTech Connect (OSTI)

    Abdel-Fattah, Amr I.

    2012-06-18

    Concluding remarks about this paper are: (1) Gravitational settling, zeta potential, and ultrafiltration data indicate the existence of a colloidal phase of both the alpha and beta emitters in the Chancellor water; (2) The low activity combined with high dispersion homogeneity of the Chancellor water indicate that both alpha and beta emitters are not intrinsic colloids; (3) Radionuclides in the Chancellor water, particularly Pu, coexist as dissolved aqueous and sorbed phases - in other words the radionuclides are partitioned between the aqueous phase and the colloidal phase; (4) The presence of Pu as a dissolved species in the aqueous phase, suggests the possibility of Pu in the (V) oxidation state - this conclusion is supported by the similarity of the k{sub d} value of Pu determined in the current study to that determined for Pu(V) sorbed onto smectite colloids, and the similar electrokinetic behavior of the Chancellor water colloids to smectite colloids; (5) About 50% of the Pu(V) is in the aqueous phase and 50% is sorbed on colloids (mass concentration of colloids in the Chancellor water is 0.12 g/L); (6) The k{sub d} of the Pu and the beta emitters (fission products) between aqueous and colloidal phases in the Chancellor water is {approx}8.0 x 10{sup 3} mL/g using two different activity measurement techniques (LSC and alpha spectroscopy); (7) The gravitational settling and size distributions of the association colloids indicate that the properties (at least the physical ones) of the colloids to which the alpha emitters are associated with seem to be different that the properties of the colloids to which the beta emitters are associated with - the beta emitters are associated with very small particles ({approx}50 - 120 nm), while the alpha emitters are associated with relatively larger particles; and (8) The Chancellor water colloids are extremely stable under the natural pH and ionic strength conditions, indicating high potential for transport in the subsurface.

  9. 2015 Iowa Wind Power Conference and Iowa Wind Energy Association...

    Office of Environmental Management (EM)

    2015 Iowa Wind Power Conference and Iowa Wind Energy Association Midwest Regional Energy Job Fair 2015 Iowa Wind Power Conference and Iowa Wind Energy Association Midwest Regional...

  10. Jefferson Lab Selects Italian Physicist As Deputy Associate Director...

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

    0Jefferson Lab Selects Italian Physicist As Deputy Associate Director for Nuclear Physics Cynthia Keppel Patrizia Rossi has been named deputy associate director for nuclear physics...

  11. Energy Department to Work with National Association of Manufacturers...

    Energy Savers [EERE]

    Department to Work with National Association of Manufacturers to Increase Industrial Energy Efficiency Energy Department to Work with National Association of Manufacturers to...

  12. Bioenergy Technologies Office: Association of Fish and Wildlife...

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

    Office: Association of Fish and Wildlife Agencies Agricultural Conservation Committee Meeting Bioenergy Technologies Office: Association of Fish and Wildlife Agencies Agricultural...

  13. Glosten Associates Tests Innovative High-Strength Mooring Lines...

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

    Glosten Associates Tests Innovative High-Strength Mooring Lines for Deepwater Offshore Wind Installations Glosten Associates Tests Innovative High-Strength Mooring Lines for...

  14. Comments by the Energy Storage Association to the Department...

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

    Comments by the Energy Storage Association to the Department of Energy Electricity Advisory Council - March 13, 2014 Comments by the Energy Storage Association to the Department of...

  15. TOP 10 VULNERABILITIES OF CONTROL SYSTEMS AND THEIR ASSOCIATED...

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

    TOP 10 VULNERABILITIES OF CONTROL SYSTEMS AND THEIR ASSOCIATED MITIGATIONS TOP 10 VULNERABILITIES OF CONTROL SYSTEMS AND THEIR ASSOCIATED MITIGATIONS This document provides...

  16. NA EA - Associate Administrator for External Affairs | National...

    National Nuclear Security Administration (NNSA)

    Us Our Operations Management and Budget Office of Civil Rights Workforce Statistics NA EA - Associate Administrator for External Affairs NA EA - Associate...

  17. NA 80 - Associate Administrator for Counterterrorism andCounterprolif...

    National Nuclear Security Administration (NNSA)

    Us Our Operations Management and Budget Office of Civil Rights Workforce Statistics NA 80 - Associate Administrator for Counterterrorism ... NA 80 - Associate...

  18. NA 70 - Associate Administrator for Defense Nuclear Security...

    National Nuclear Security Administration (NNSA)

    Us Our Operations Management and Budget Office of Civil Rights Workforce Statistics NA 70 - Associate Administrator for Defense ... NA 70 - Associate Administrator...

  19. NA 40 - Associate Administrator for Emergency Operations | National...

    National Nuclear Security Administration (NNSA)

    Us Our Operations Management and Budget Office of Civil Rights Workforce Statistics NA 40 - Associate Administrator for Emergency Operations NA 40 - Associate...

  20. Economic Impacts Associated With Commercializing Fuel Cell Electric...

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

    Impacts Associated With Commercializing Fuel Cell Electric Vehicles in California: An Analysis of the California Road Map Using the JOBS H2 Model Economic Impacts Associated With...

  1. Top 10 Vulnerabilities of Control Systems and Their Associated...

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

    Top 10 Vulnerabilities of Control Systems and Their Associated Migitations (2006) Top 10 Vulnerabilities of Control Systems and Their Associated Migitations (2006) This document...

  2. ORNL's Peng wins Fusion Power Associates Leadership Award | ornl...

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

    Peng Wins Leadership Award ORNL's Peng wins Fusion Power Associates Leadership Award Morgan McCorkle - August 17, 2010 ORNL's Martin Peng, recipient of Fusion Power Associates'...

  3. Maryland-National Capital Building Industry Association Regulatory...

    Office of Environmental Management (EM)

    Maryland-National Capital Building Industry Association Regulatory Burden RFI (Federal Register August 8, 2012) Maryland-National Capital Building Industry Association Regulatory...

  4. Factors Associated with Hepatitis B Testing Among Vietnamese Americans

    E-Print Network [OSTI]

    2010-01-01

    Asian American adults for hepatitis B: a cross-sectionalFactors Associated with Hepatitis B Testing Among VietnameseBACKGROUND: Chronic hepatitis B and hepatitis B- associated

  5. Identification and mapping of a CNV associated with psoriasis

    E-Print Network [OSTI]

    Chen, Alvin Lone

    2011-01-01

    association  with  psoriasis  vulgaris  in  Caucasian  but  PL. ,  et  al.  (2007).  Psoriasis  is  associated  with  corneodesmosin  in  psoriasis   susceptibility.   J  Med  

  6. Comments from The National Association of Regulatory Utility...

    Energy Savers [EERE]

    Comments from The National Association of Regulatory Utility Commissioners (NARUC) on the Smart Grid RFI Comments from The National Association of Regulatory Utility Commissioners...

  7. Designer Proteins Target Epstein-Barr-Virus-Associated Cancer

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

    Designer Proteins Target Epstein-Barr-Virus-Associated Cancer Designer Proteins Target Epstein-Barr-Virus-Associated Cancer Print Wednesday, 03 December 2014 00:00 Immortality is...

  8. DOE Awards $3 Million Contract to Oak Ridge Associated Universities...

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

    DOE Awards 3 Million Contract to Oak Ridge Associated Universities for Expert Review of Yucca Mountain Work DOE Awards 3 Million Contract to Oak Ridge Associated Universities for...

  9. Bioenergy Technologies Office: Association of Fish and Wildlife...

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

    Bioenergy Technologies Office: Association of Fish and Wildlife Agencies Agricultural Conservation Committee Meeting Bioenergy Technologies Office: Association of Fish and Wildlife...

  10. Department of Energy Cites Brookhaven Science Associates, LLC...

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

    Department of Energy Cites Brookhaven Science Associates, LLC for Worker Safety and Health Violations Department of Energy Cites Brookhaven Science Associates, LLC for Worker...

  11. Protocol for Addressing Induced Seismicity Associated with Enhanced...

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

    Protocol for Addressing Induced Seismicity Associated with Enhanced Geothermal Systems (EGS) Protocol for Addressing Induced Seismicity Associated with Enhanced Geothermal Systems...

  12. Protocol for Addressing Induced Seismicity Associated with Enhanced...

    Energy Savers [EERE]

    Protocol for Addressing Induced Seismicity Associated with Enhanced Geothermal Systems Protocol for Addressing Induced Seismicity Associated with Enhanced Geothermal Systems This...

  13. Large Higgs energy region in Higgs associated top pair production...

    Office of Scientific and Technical Information (OSTI)

    Large Higgs energy region in Higgs associated top pair production at the Linear Collider Citation Details In-Document Search Title: Large Higgs energy region in Higgs associated...

  14. Department of Energy Cites Brookhaven Science Associates, LLC...

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

    Brookhaven Science Associates, LLC for Worker Safety and Health Violations Department of Energy Cites Brookhaven Science Associates, LLC for Worker Safety and Health Violations...

  15. UTILIZATION DOBER, LIDSKY, CRAIG & ASSOCIATES, INC. * CRAIG, GAULDEN & DAVIS * SEAMON, WHITESIDE & ASSOCIATES, INC * MCCRACKEN & LOPEZ, P.A.

    E-Print Network [OSTI]

    Stuart, Steven J.

    SPACE UTILIZATION STUDY 2002 DOBER, LIDSKY, CRAIG & ASSOCIATES, INC. * CRAIG, GAULDEN & DAVIS 2002 SPACE UTILIZATION STUDY DOBER, LIDSKY, CRAIG & ASSOCIATES, INC. * CRAIG, GAULDEN & DAVIS * SEAMON CAMPUS SPACE UTILIZATION

  16. Delone dynamical systems and associated random operators

    E-Print Network [OSTI]

    Daniel Lenz; Peter Stollmann

    2002-05-13

    We carry out a careful study of basic topological and ergodic features of Delone dynamical systems. We then investigate the associated topological groupoids and in particular their representations on certain direct integrals with non constant fibres. Via non-commutative-integration theory these representations give rise to von Neumann algebras of random operators. Features of these algebras and operators are discussed. Restricting our attention to a certain subalgebra of tight binding operators, we then discuss a Shubin trace formula.

  17. Induced seismicity associated with enhanced geothermal system

    SciTech Connect (OSTI)

    Majer, Ernest; Majer, Ernest L.; Baria, Roy; Stark, Mitch; Oates, Stephen; Bommer, Julian; Smith, Bill; Asanuma, Hiroshi

    2006-09-26

    Enhanced Geothermal Systems (EGS) offer the potential to significantly add to the world energy inventory. As with any development of new technology, some aspects of the technology has been accepted by the general public, but some have not yet been accepted and await further clarification before such acceptance is possible. One of the issues associated with EGS is the role of microseismicity during the creation of the underground reservoir and the subsequent extraction of the energy. The primary objectives of this white paper are to present an up-to-date review of the state of knowledge about induced seismicity during the creation and operation of enhanced geothermal systems, and to point out the gaps in knowledge that if addressed will allow an improved understanding of the mechanisms generating the events as well as serve as a basis to develop successful protocols for monitoring and addressing community issues associated with such induced seismicity. The information was collected though literature searches as well as convening three workshops to gather information from a wide audience. Although microseismicity has been associated with the development of production and injection operations in a variety of geothermal regions, there have been no or few adverse physical effects on the operations or on surrounding communities. Still, there is public concern over the possible amount and magnitude of the seismicity associated with current and future EGS operations. It is pointed out that microseismicity has been successfully dealt with in a variety of non-geothermal as well as geothermal environments. Several case histories are also presented to illustrate a variety of technical and public acceptance issues. It is concluded that EGS Induced seismicity need not pose any threat to the development of geothermal resources if community issues are properly handled. In fact, induced seismicity provides benefits because it can be used as a monitoring tool to understand the effectiveness of the EGS operations and shed light on the mechanics of the reservoir.

  18. Lithium Depletion of Nearby Young Stellar Associations

    E-Print Network [OSTI]

    Erin Mentuch; Alexis Brandeker; Marten H. van Kerkwijk; Ray Jayawardhana; Peter H. Hauschildt

    2008-08-26

    We estimate cluster ages from lithium depletion in five pre-main-sequence groups found within 100 pc of the Sun: TW Hydrae Association, Eta Chamaeleontis Cluster, Beta Pictoris Moving Group, Tucanae-Horologium Association and AB Doradus Moving Group. We determine surface gravities, effective temperatures and lithium abundances for over 900 spectra through least squares fitting to model-atmosphere spectra. For each group, we compare the dependence of lithium abundance on temperature with isochrones from pre-main-sequence evolutionary tracks to obtain model dependent ages. We find that the Eta Chamaelontis Cluster and the TW Hydrae Association are the youngest, with ages of 12+/-6 Myr and 12+/-8 Myr, respectively, followed by the Beta Pictoris Moving Group at 21+/-9 Myr, the Tucanae-Horologium Association at 27+/-11 Myr, and the AB Doradus Moving Group at an age of at least 45 Myr (where we can only set a lower limit since the models -- unlike real stars -- do not show much lithium depletion beyond this age). Here, the ordering is robust, but the precise ages depend on our choice of both atmospheric and evolutionary models. As a result, while our ages are consistent with estimates based on Hertzsprung-Russell isochrone fitting and dynamical expansion, they are not yet more precise. Our observations do show that with improved models, much stronger constraints should be feasible: the intrinsic uncertainties, as measured from the scatter between measurements from different spectra of the same star, are very low: around 10 K in effective temperature, 0.05 dex in surface gravity, and 0.03 dex in lithium abundance.

  19. QER- Comment of Natural Gas Supply Association

    Broader source: Energy.gov [DOE]

    TO: Quadrennial Energy Review Task Force In response to the Department of Energy’s August 25, 2014 Federal Register Notice seeking input on the Quadrennial Energy Review, attached are comments from the Natural Gas Supply Association. Thank you for this opportunity to share our views on the important issue of energy infrastructure. If we can be of further assistance, please let me know. Regards,

  20. Water issues associated with heavy oil production.

    SciTech Connect (OSTI)

    Veil, J. A.; Quinn, J. J.; Environmental Science Division

    2008-11-28

    Crude oil occurs in many different forms throughout the world. An important characteristic of crude oil that affects the ease with which it can be produced is its density and viscosity. Lighter crude oil typically can be produced more easily and at lower cost than heavier crude oil. Historically, much of the nation's oil supply came from domestic or international light or medium crude oil sources. California's extensive heavy oil production for more than a century is a notable exception. Oil and gas companies are actively looking toward heavier crude oil sources to help meet demands and to take advantage of large heavy oil reserves located in North and South America. Heavy oil includes very viscous oil resources like those found in some fields in California and Venezuela, oil shale, and tar sands (called oil sands in Canada). These are described in more detail in the next chapter. Water is integrally associated with conventional oil production. Produced water is the largest byproduct associated with oil production. The cost of managing large volumes of produced water is an important component of the overall cost of producing oil. Most mature oil fields rely on injected water to maintain formation pressure during production. The processes involved with heavy oil production often require external water supplies for steam generation, washing, and other steps. While some heavy oil processes generate produced water, others generate different types of industrial wastewater. Management and disposition of the wastewater presents challenges and costs for the operators. This report describes water requirements relating to heavy oil production and potential sources for that water. The report also describes how water is used and the resulting water quality impacts associated with heavy oil production.

  1. Quadratic Equation over Associative D-Algebra

    E-Print Network [OSTI]

    Aleks Kleyn

    2015-05-30

    In this paper, I treat quadratic equation over associative $D$-algebra. In quaternion algebra $H$, the equation $x^2=a$ has either $2$ roots, or infinitely many roots. Since $a\\in R$, $aequation has infinitely many roots. Otherwise, the equation has roots $x_1$, $x_2$, $x_2=-x_1$. I considered different forms of the Viete's theorem and a possibility to apply the method of completing the square. Assumed the hypothesis that, in noncommutative algebra, the equation $$(x-b)(x-a)+(x-a)(x-c)=0$$ $b\

  2. Varit de Nakajima associe un Carquois.

    E-Print Network [OSTI]

    Sabourin, Hervé

    . On associe à Q une matrice de Cartan C = (C ij ), dé#28;nie par : i 6= j; c ij = c ji = nombre de #29;èches#28;nit de même : RQ (v) = M a2Q 1 Hom(V s(a) ; V t(a) ) = M a2Q 1 Hom(C s(a) ; C t(a) ) RQ (v) = RQ = t v(2d + (2I C)v) On va dé#28;nir maintenant un produit dans RQ (v), de la manière suivante : Soit V

  3. Geothermal Energy Association | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History View New PagesSustainable UrbanKentucky:Bore Technologies Inc Jump to: navigation,Association Jump

  4. Solar Electric Power Association | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page| Open Energy Information Serbia-Enhancing Capacity forSilicium deEnergy InformationDepot Inc Jump to:Association

  5. Panich, Noel + Associates | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History ViewMayo, Maryland:NPIProtectio Program |View New Pages RecentPalomarPanich, Noel + Associates Jump

  6. Working with CMI: Associates | Critical Materials Institute

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail.Theory ofDidDevelopmentatabout Who Works for NIF & PS?at NNSA |Associates CMI

  7. Benton Falls Associates | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LISTStar Energy LLC Jump to:Greece:BajoBelpower Srl Jump to:Falls Associates Jump to:

  8. Environmental Markets Association | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LISTStar2-0057-EA Jump to:ofEnia SpA Jump to:Energy Tech ServicesAssociation Jump to:

  9. German Biogas Association | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LISTStar2-0057-EA Jump to:ofEniaElectric Jump to:Ger te undAssociation Jump to:

  10. German Wind Energy Association | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LISTStar2-0057-EA Jump to:ofEniaElectric Jump to:Ger te undAssociationPelletsGerman

  11. Secure Smart Grid Association | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop Inc Jump to:Newberg,EnergyEastCarbonOpenSchulthess GroupSmart Grid Association

  12. Bob Lawrence Associates Inc | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental JumpInformationBio-GasIllinois: EnergyHills,BluefieldBob Lawrence Associates Inc

  13. Dakota Electric Association | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTIONRobertsdale, Alabama (UtilityInstruments Inc Jump to:67-2006-12DabbrookAssociation Jump to:

  14. Global Change Associates | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsource History View New Pages RecentPlant <SilverChange Associates Jump to:

  15. Layman Energy Associates | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsource History ViewInformationWinds Jump to:Laredo RidgeLayman Energy Associates Jump

  16. Broin and Associates | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop IncIowaWisconsin:PontiacInformation ForestBroadStar Wind Systemsand Associates

  17. Community Association Institute | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoopButtePower Ventures JumpCommercial Jump to: navigation, search Click toAssociation

  18. American Gas Association | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsofProgram:Y-12 Beta-3AUDITLeslieAlgae BiomassServices »Money |ofAssociation

  19. Heat Transfer Operators Associated with Quantum Operations

    E-Print Network [OSTI]

    Ç. Aksak; S. Turgut

    2011-04-14

    Any quantum operation applied on a physical system is performed as a unitary transformation on a larger extended system. If the extension used is a heat bath in thermal equilibrium, the concomitant change in the state of the bath necessarily implies a heat exchange with it. The dependence of the average heat transferred to the bath on the initial state of the system can then be found from the expectation value of a hermitian operator, which is named as the heat transfer operator (HTO). The purpose of this article is the investigation of the relation between the HTOs and the associated quantum operations. Since, any given quantum operation on a system can be realized by different baths and unitaries, many different HTOs are possible for each quantum operation. On the other hand, there are also strong restrictions on the HTOs which arise from the unitarity of the transformations. The most important of these is the Landauer erasure principle. This article is concerned with the question of finding a complete set of restrictions on the HTOs that are associated with a given quantum operation. An answer to this question has been found only for a subset of quantum operations. For erasure operations, these characterizations are equivalent to the generalized Landauer erasure principle. For the case of generic quantum operations however, it appears that the HTOs obey further restrictions which cannot be obtained from the entropic restrictions of the generalized Landauer erasure principle.

  20. Biotechnological applications of plant freezing associated Ghislain Breton1

    E-Print Network [OSTI]

    Sarhan, Fathey

    57 Biotechnological applications of plant freezing associated proteins Ghislain Breton1 , Jean and freezing conditions. The identification of these freezing tolerance associated proteins and the elucidation, freezing tolerance, frozen food, genetic engineering, organ preservation, osmoprotectants, osmotic stress

  1. 28th Meeting of the European Crystallographic Association

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

    of the European Crystallographic Association 28th Meeting of the European Crystallographic Association Print http:ecm28.ecanews.org August 25-29, 2013; University of Warwick, UK...

  2. Kevin W. Cassel Associate Professor of Mechanical and Aerospace Engineering

    E-Print Network [OSTI]

    Cassel, Kevin W.

    March 2014 Kevin W. Cassel Associate Professor of Mechanical and Aerospace Engineering Associate Chair Mechanical, Materials, and Aerospace Engineering Department Illinois Institute of Technology #12 VII.IV Mechanical, Materials, and Aerospace Engineering Department Service, Illinois Institute

  3. QER - Comment of National Association of State Energy Officials...

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

    Association of State Energy Officials QER - Comment of National Association of State Energy Officials From: Roberta Rothschild rr@dwgp.com Sent: Friday, October 10, 2014 4:09 PM...

  4. Edinburgh Research Explorer Lung Microbiota Changes Associated with Chronic

    E-Print Network [OSTI]

    Millar, Andrew J.

    Edinburgh Research Explorer Lung Microbiota Changes Associated with Chronic Pseudomonas aeruginosa Lung Infection and the Impact of Intravenous Colistimethate Sodium Citation for published version, 'Lung Microbiota Changes Associated with Chronic Pseudomonas aeruginosa Lung Infection and the Impact

  5. Associated Shale Gas- From Flares to Rig Power 

    E-Print Network [OSTI]

    Wallace, Elizabeth Michelle

    2014-10-16

    From September 2011 to July 2013 the percentage of flared associated gas produced in the Bakken shale formation decreased from 36% to 29%. Although the percentage decreased, the volume of associated gas produced has almost tripled to 900 MMcf...

  6. Kinesin Motor Transport is Altered by Macromolecular Crowding and Transiently Associated Microtubule-Associated Proteins

    E-Print Network [OSTI]

    Ross, Jennifer

    01 Kinesin Motor Transport is Altered by Macromolecular Crowding and Transiently Associated of crowding and an increasingly complex cellular environment on the transport of individual motor proteins, we have performed in vitro reconstitution experiments with single kinesin-1 motors walking on microtubules

  7. EuROPEAN MICROWAVE ASSOCIATION Proceedings of the European Microwave Association Vol. ?; 2008.

    E-Print Network [OSTI]

    Brest, Université de

    velocity (NGV) and superluminal group velocity (faster than the speed of light in vacuum c) that occur causality. In the case of artificial lines with resonant cells that exhibit NGV in narrow frequency band [5 through pulse reshaping. In region of anomalous dispersion, NGV is always associated with high

  8. Accelerating CHP Deployment, United States Energy Association (USEA), August 2011

    Broader source: Energy.gov [DOE]

    An Industry Consultation by the United States Energy Association (USEA) on Accelerating Combined Heat and Power (CHP) Deployment

  9. Seabird associations with mesoscale eddies: the subtropical Indian Ocean

    E-Print Network [OSTI]

    Hyrenbach, KD; Veit, RR; Weimerskirch, H; Jr, HGL

    2006-01-01

    Seabird associations with mesoscale eddies: the subtropicalsur- hydrographic fronts and mesoscale eddies (Haney & veyedclimatologies. J Clim mesoscale variability across ocean

  10. NA IM- Associate Administrator for Information Management & Chief...

    National Nuclear Security Administration (NNSA)

    IM- Associate Administrator for Information Management & Chief Information Officer | National Nuclear Security Administration Facebook Twitter Youtube Flickr RSS People Mission...

  11. NA APM - Associate Administrator for Acquisition & Project Management...

    National Nuclear Security Administration (NNSA)

    APM - Associate Administrator for Acquisition & Project Management | National Nuclear Security Administration Facebook Twitter Youtube Flickr RSS People Mission Managing the...

  12. Spills and leaks Associated with Shale Gas Development

    E-Print Network [OSTI]

    Walter, M.Todd

    1 Spills and leaks Associated with Shale Gas Development (Updated April 27th , 2012) Brief of toxic chemicals, contaminated water, or hazardous materials. Spills and leaks associated with shale gas associated with shale gas development will depend on the pace and scale with which the industry grows

  13. Oklahoma 4-H Alumni Association Membership Form Name Maiden Name

    E-Print Network [OSTI]

    Balasundaram, Balabhaskar "Baski"

    Oklahoma 4-H Alumni Association Membership Form Name Maiden Name Home County County Residing Awards/Trips Your membership in the Oklahoma 4-H Alumni Association is an investment in the future of Oklahoma 4-H. Half of your dues will be invested in maintaining the 4-H Alumni Association and the 4-H

  14. A report by Civic Enterprises and the National Peace Corps Association in partnership with Peter D. Hart Research Associates

    E-Print Network [OSTI]

    Snider, Barry B.

    . Hart Research Associates By: John M. Bridgeland, Harris Wofford, Kevin F.F. Quigley, Jessica A. Milano

  15. Membrane associated phospholipase C from bovine brain

    SciTech Connect (OSTI)

    Lee, K.; Ryu, S.H.; Suh, P.; Choi, W.C.; Rhee, S.G.

    1987-05-01

    Cytosolic fractions of bovine brain contain 2 immunologically distinct phosphoinositide-specific phospholipase (PLC), PLC-I and PLC-II, whose MW are 150,000 and 145,000 respectively, under a denaturing condition. Monoclonal antibodies were derived against each form and specific radioimmunoassays were developed. Distribution of PLC-I and PLC-II in cytosolic and particulate fractions was measured using the radioimmunoassay. More than 90% of PLC-II was found in the cytosolic fraction, while the anti-PLC-I antibody cross-reacting protein was distributed nearly equally between the soluble fraction and the 2 M KCl extract of particulate fraction. The PLC enzyme in the particulate fraction was purified to homogeneity, yielding 2 proteins of 140 KDa and 150 KDa when analyzed on SDS-PAGE. Neither of the 2 enzymes cross-reacted with anti-PLC-II antibodies, but both could be immunoblotted by all 4 different anti-PLC-I antibodies. This suggests that the 140 KDa PLC was derived from the 150 KDa form. The 150 Kda form from particulate fraction was indistinguishable from the cytosolic PLC-I when their mixture was analyzed on SDS-PAGE. In addition, the elution profile of tryptic peptides derived from the 150 KDa particulate form was identical to that of cytosolic PLC-I. This result indicates that PLC-I is reversibly associated to membranes.

  16. Sponsors of CIEEDAC: Natural Resources Canada, Canadian Industry Program for Energy Conservation, Aluminium Industry Association, Canadian Petroleum Products Institute, Canadian Portland Cement Association, Canadian Pulp

    E-Print Network [OSTI]

    , Canadian Pulp and Paper Association, Canadian Steel Producers Association, Canadian Textiles InstituteSponsors of CIEEDAC: Natural Resources Canada, Canadian Industry Program for Energy Conservation, Aluminium Industry Association, Canadian Petroleum Products Institute, Canadian Portland Cement Association

  17. Associated Particle Tagging (APT) in Magnetic Spectrometers

    SciTech Connect (OSTI)

    Jordan, David V.; Baciak, James E.; Stave, Sean C.; Chichester, David; Dale, Daniel; Kim, Yujong; Harmon, Frank

    2012-10-16

    Summary In Brief The Associated Particle Tagging (APT) project, a collaboration of Pacific Northwest National Laboratory (PNNL), Idaho National Laboratory (INL) and the Idaho State University (ISU)/Idaho Accelerator Center (IAC), has completed an exploratory study to assess the role of magnetic spectrometers as the linchpin technology in next-generation tagged-neutron and tagged-photon active interrogation (AI). The computational study considered two principle concepts: (1) the application of a solenoidal alpha-particle spectrometer to a next-generation, large-emittance neutron generator for use in the associated particle imaging technique, and (2) the application of tagged photon beams to the detection of fissile material via active interrogation. In both cases, a magnetic spectrometer momentum-analyzes charged particles (in the neutron case, alpha particles accompanying neutron generation in the D-T reaction; in the tagged photon case, post-bremsstrahlung electrons) to define kinematic properties of the relevant neutral interrogation probe particle (i.e. neutron or photon). The main conclusions of the study can be briefly summarized as follows: Neutron generator: • For the solenoidal spectrometer concept, magnetic field strengths of order 1 Tesla or greater are required to keep the transverse size of the spectrometer smaller than 1 meter. The notional magnetic spectrometer design evaluated in this feasibility study uses a 5-T magnetic field and a borehole radius of 18 cm. • The design shows a potential for 4.5 Sr tagged neutron solid angle, a factor of 4.5 larger than achievable with current API neutron-generator designs. • The potential angular resolution for such a tagged neutron beam can be less than 0.5o for modest Si-detector position resolution (3 mm). Further improvement in angular resolution can be made by using Si-detectors with better position resolution. • The report documents several features of a notional generator design incorporating the alpha-particle spectrometer concept, and outlines challenges involved in the magnetic field design. Tagged photon interrogation: • We investigated a method for discriminating fissile from benign cargo-material response to an energy-tagged photon beam. The method relies upon coincident detection of the tagged photon and a photoneutron or photofission neutron produced in the target material. The method exploits differences in the shape of the neutron production cross section as a function of incident photon energy in order to discriminate photofission yield from photoneutrons emitted by non-fissile materials. Computational tests of the interrogation method as applied to material composition assay of a simple, multi-layer target suggest that the tagged-photon information facilitates precise (order 1% thickness uncertainty) reconstruction of the constituent thicknesses of fissile (uranium) and high-Z (Pb) constituents of the test targets in a few minutes of photon-beam exposure. We assumed an 18-MeV endpoint tagged photon beam for these simulations. • The report addresses several candidate design and data analysis issues for beamline infrastructure required to produce a tagged photon beam in a notional AI-dedicated facility, including the accelerator and tagging spectrometer.

  18. Next-Generation Ecosystem Experiments (NGEE Arctic)

    E-Print Network [OSTI]

    (CLM 4.0) for improved prediction of carbon cycle processes and net energy balance feedbacks on Earth and subsurface systems #12;Properties and Processes are Important #12;Thawing Thermokarst Thermal erosion Surface mechanisms that underlie the processes that control carbon and energy transfer in the biosphere

  19. A geospatial analysis of Arctic marine traffic

    E-Print Network [OSTI]

    Eucker, William

    2012-04-10

    , and multi-year sea ice (Wadhams, 2000). A consistent record of sea-ice thickness distribution has been provided by upward-directed sonar measurements recorded on undersea traverses of nuclear powered submarines (Rothrock et al., 2007... is confirmed by the decreasing average thickness of the ice pack since 1976 based on upward-directed sonar measurements from declassified nuclear submarine traverses. Figure 3 shows this observed decrease in sea- ice thickness based on measurements...

  20. Science Needs in the Arctic Larry Hinzman

    E-Print Network [OSTI]

    , fluxes and pathways? How do liquid water films and freeze-thaw processes influence microbial activity Francis et al., JGR 2009 #12;Permafrost covers about 25% of the terrestrial area. Degradation

  1. Arctic Energy Technology Development Laboratory (Part 3)

    SciTech Connect (OSTI)

    See OSTI ID Number 960443

    2008-12-31

    Various laboratory tests were carried at the R & D facility of BJ Services in Tomball, TX with BJ Services staff to predict and evaluate the performance of the Ceramicrete slurry for its effective use in permafrost cementing operations. Although other standards such as those of the American Standard for Testing Materials (ASTM) and Construction Specification Institute (CSI) exist, all these tests were standardized by the API. A summary of the tests traditionally used in the cement slurry design as well as the API tests reference document are provided in Table 7. All of these tests were performed within the scope of this research to evaluate properties of the Ceramicrete.

  2. (ARCTIC WHALE ECOLOGY STUDY) 2013 Cruise Report

    E-Print Network [OSTI]

    of 51 This report was prepared by the ARCWEST principal investigators: Nancy A. Friday1 , Ph.D., Phillip.30 million square kilometers). This area was more than 50% less than that of two decades ago. The speed-round presence of large whales is needed in the Chukchi Sea planning area. Timing and location of whale

  3. Disappearing Arctic Lakes L. C. Smith,1

    E-Print Network [OSTI]

    . The regional totals indicate a net decline in Siberian lake cover but mask an interesting spatial pattern with water (SOM text). Such observations are in apparent conflict with the phenomenon seen here and also near surveys at the Alaskan site suggest that warming temperatures lead to thinning and eventual Bbreaching

  4. Arctic Lower Troposphere Observed Structure (ALTOS)

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 OutreachProductswsicloudwsiclouddenDVA N C E D B L O O D SFederal8823 Revision 02August 1, Lower Troposphere

  5. ARM - Field Campaign - Arctic Cloud Infrared Imaging

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach HomeA Better Anode Design to Improve4AJ01) (See22, 2012IIIAtlantic (ACE-ENA)Study the

  6. ARM - Arctic Lower Troposphere Observed Structure (ALTOS)

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail.TheoryTuesday, August 10, 20102016Study (CHAPS)Archive Campaign Details News

  7. turner_poster.arctic_bbhrp.ppt

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effectWorkingLosThe 26thI D- 6 0 4 2 r m mCharacterizing the Water Vapor

  8. Path to Economic Sovereignty: Arctic Opportunities

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousMathematicsEnergyInterested PartiesBuilding energy codes havePUBLICof

  9. Ice in Arctic Mixed-phase Stratocumulus

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverse (JournalvivoHighHussein KhalilResearch88 Sign In AboutWorkshop:Ice Nuclei

  10. Evaluating Model Parameterizations of Arctic Processes

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would like submitKansasCommunitiesof Energy8) Wigner Home ·the Effect of Upper-Level

  11. North Slope Co. Northwest Arctic Co.

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustments (Billion Cubic Feet) Wyoming Dry NaturalPrices1Markets16 (next20, 200820087 DOE/NASEONABOE

  12. North Slope Co. Northwest Arctic Co.

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustments (Billion Cubic Feet) Wyoming Dry NaturalPrices1Markets16 (next20, 200820087 DOE/NASEONABOEGas

  13. North Slope Co. Northwest Arctic Co.

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustments (Billion Cubic Feet) Wyoming Dry NaturalPrices1Markets16 (next20, 200820087

  14. Press Roundtable with U.S. Energy Secretary Bodman & U.S. Agriculture...

    Energy Savers [EERE]

    you think BP or any oil company can be trusted now to build and maintain the proposed natural gas pipeline in Alaska, or drill in ANWR for oil if it's ever opened up? MR. BODMAN:...

  15. Fluorescent dyes for probing cellular functions associated with...

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

    fluorescence dyes suitable for visualization of specific cellular functions associated with electron beam damage and carry out electron microscopy imaging of labelled cells....

  16. Voluntary Protection Program Onsite Review, Oak Ridge Associated...

    Broader source: Energy.gov (indexed) [DOE]

    whether Oak Ridge Associated Universities Oak Ridge Institute for Science and Education is continuing to perform at a level deserving DOE-VPP Star recognition. The Team...

  17. Roadmap: Systems/Industrial Engineering Technology Associate of Applied Science

    E-Print Network [OSTI]

    Sheridan, Scott

    Roadmap: Systems/Industrial Engineering Technology ­ Associate of Applied Science [RE Kent Core Summary below Semester Four: [17 Credit Hours] MERT 22009 Robotics and Flexible Automation 3

  18. Notice of Intent (NOI) for Storm Water Discharges Associated...

    Open Energy Info (EERE)

    (NOI) for Storm Water Discharges Associated with Construction Activities under TPDES General Permit (TXR150000) Jump to: navigation, search OpenEI Reference LibraryAdd to library...

  19. Delta-Montrose Electric Association- Commercial Energy Efficiency Rebate Program

    Broader source: Energy.gov [DOE]

    Delta-Montrose Electric Association (DMEA) offers a variety of rebates to commercial customers which upgrade to energy efficient equipment. Rebates are available for energy efficient heat pumps,...

  20. Delta-Montrose Electric Association- Residential Energy Efficiency Rebate Program

    Broader source: Energy.gov [DOE]

    Delta-Montrose Electric Association (DMEA) offers a variety of rebates for customers who buy energy efficient appliances and equipment. Rebates are available for energy efficient electric water...

  1. San Miguel Power Association- Energy Efficiency Rebate Program

    Broader source: Energy.gov [DOE]

    San Miguel Power Association (SMPA) offers a variety of rebates to customers for the purchase and installation of energy efficient equipment and appliances. Both residential and commercial...

  2. American Gas Association Memorandum Summarizing Ex Parte Communication...

    Energy Savers [EERE]

    Memorandum Summarizing Ex Parte Communication American Gas Association Memorandum Summarizing Ex Parte Communication On October 9, 2014, a workshop was hosted by the American Gas...

  3. Illinois Solar Energy Association- Renewable Energy Credit Aggregation Program

    Broader source: Energy.gov [DOE]

    The Illinois Solar Energy Association offers the Renewable Energy Credit Aggregation Program (RECAP) to Illinois solar photovoltaic (PV) system owners, providing them with an opportunity to recei...

  4. New Mexico Associated-Dissolved Natural Gas, Reserves in Nonproducing...

    U.S. Energy Information Administration (EIA) Indexed Site

    Reserves in Nonproducing Reservoirs, Wet (Billion Cubic Feet) New Mexico Associated-Dissolved Natural Gas, Reserves in Nonproducing Reservoirs, Wet (Billion Cubic Feet) Decade...

  5. ,"Federal Offshore, Gulf of Mexico, Louisiana & Alabama Associated...

    U.S. Energy Information Administration (EIA) Indexed Site

    Of Series","Frequency","Latest Data for" ,"Data 1","Federal Offshore, Gulf of Mexico, Louisiana & Alabama Associated-Dissolved Natural Gas Proved Reserves, Wet After Lease...

  6. ,"New Mexico Associated-Dissolved Natural Gas Proved Reserves...

    U.S. Energy Information Administration (EIA) Indexed Site

    Name","Description"," Of Series","Frequency","Latest Data for" ,"Data 1","New Mexico Associated-Dissolved Natural Gas Proved Reserves, Wet After Lease...

  7. ,"Federal Offshore, Gulf of Mexico, Texas Associated-Dissolved...

    U.S. Energy Information Administration (EIA) Indexed Site

    Of Series","Frequency","Latest Data for" ,"Data 1","Federal Offshore, Gulf of Mexico, Texas Associated-Dissolved Natural Gas Proved Reserves, Wet After Lease...

  8. A Primitive Alkali Basaltic Stratovolcano And Associated Eruptive...

    Open Energy Info (EERE)

    Significance Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: A Primitive Alkali Basaltic Stratovolcano And Associated Eruptive Centres,...

  9. Bioenergy Technologies Office: Association of Fish and Wildlife...

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

    U.S. Department of Energy Bioenergy Technologies Office Association of Fish & Wildlife Agencies Agricultural Conservation Committee Meeting March 29, 2013 Kristen Johnson...

  10. Los Alamos National Laboratory names Jeffrey Mousseau Associate...

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

    been hired as the new associate director for Environmental Programs. Contact Colleen Curran Communications Office (505) 664-0344 Email "Jeff shares my personal commitment to...

  11. Southern Pine Electric Power Association- Residential Energy Efficiency Rebate Program

    Broader source: Energy.gov [DOE]

    Southern Pine Electric Power Association offers the Comfort Advantage Home Program which provides rebates on heat pumps to new homes which meet certain Comfort Advantage weatherization standards....

  12. Coast Electric Power Association- Commercial Energy Efficiency Rebate Program

    Broader source: Energy.gov [DOE]

    Coast Electric Power Association provides incentives for commercial customers to increase the energy efficiency of facilities. Rebates are provided for new or replacement energy efficient heat...

  13. TOP 10 VULNERABILITIES OF CONTROL SYSTEMS AND THEIR ASSOCIATED...

    Broader source: Energy.gov (indexed) [DOE]

    Vulnerabilities of Control Systems and Their Associated Migitations (2006) Introduction SCADA Security for Managers and Operators DOE National SCADA Test Bed Program Multi-Year...

  14. Top 10 Vulnerabilities of Control Systems and Their Associated...

    Broader source: Energy.gov (indexed) [DOE]

    and Theif Associated Mitigations (2006) More Documents & Publications Introduction SCADA Security for Managers and Operators TOP 10 VULNERABILITIES OF CONTROL SYSTEMS AND...

  15. UVB-Sensitive solar urticaria possibly associated with terbinafine

    E-Print Network [OSTI]

    Kuo, Sandy; Sivamani, Raja K

    2014-01-01

    and prognosis of idiopathic solar urticaria: a cohort of 87possible terbinafine-associated solar urticaria. Terbinafineshould be aware that solar urticarial, albeit rare, is

  16. High-resolution genetic mapping of allelic variants associated...

    Office of Scientific and Technical Information (OSTI)

    associated with Populus cell wall phenotypes determined independently using pyrolysis Molecular Beam Mass Spectrometry (pyMBMS), saccharification assay and wet chemistry...

  17. Geothermal Energy Association Honors Two NRELians with Top Recognition...

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

    association that supports the expanded use of geothermal energy and the development of geothermal resources worldwide for electrical power generation and direct-heat uses. More...

  18. LWZ-0023- In the Matter of Universities Research Association, Inc.

    Broader source: Energy.gov [DOE]

    Universities Research Association, Inc. (URA) is the management and operating contractor for the Department of Energy's (the DOE) Superconducting Super Collider Laboratory (the Laboratory) in...

  19. QER- Comment of Electric Power Supply Association 4

    Broader source: Energy.gov [DOE]

    Please find the attached comments of the Electric Power Supply Association on the Department of Energy’s Quadrennial Energy Review due October 10, 2014.

  20. QER- Comment of Electric Power Supply Association 2

    Broader source: Energy.gov [DOE]

    Please find the attached comments of the Electric Power Supply Association on the Department of Energy’s Quadrennial Energy Review due October 10, 2014. Respectfully submitted,