Sample records for angola antarctica antigua

  1. antigua and barbuda: Topics by E-print Network

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

    Bahamas Barbados Belize Bermuda British Antarctic Territory Steiner, Ullrich 3 Angola Croatia Iceland Nepal Sri Lanka Antigua & Barbuda Cuba India Netherlands St. Kitts & Nevis...

  2. angola iran nigeria: Topics by E-print Network

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

    and the Question of Street Politics Illinois at Chicago, University of 12 Angola Croatia Iceland Nepal Sri Lanka Antigua & Barbuda Cuba India Netherlands St. Kitts & Nevis...

  3. Antigua and Barbuda-Caribbean Community (CARICOM) Sustainable...

    Open Energy Info (EERE)

    Jump to: navigation, search Name Antigua and Barbuda-Caribbean Community (CARICOM) Sustainable Energy Roadmap and Strategy AgencyCompany Organization Inter-American...

  4. Angola: World Oil Report 1991

    SciTech Connect (OSTI)

    Not Available

    1991-08-01T23:59:59.000Z

    This paper reports that prospects of Angola, free of political complications, are certain to bring a flurry of interest from oil firms and could mean an influx of foreign capital. Licensing will be under production-sharing terms, but incentives may be offered due to increased risks inherent in deeper water. Long term security and stability remain uncertain. In addition to Unita and previously communist MPLA, new factions from 16 years of civil war are gaining support and increasing possibilities for violence. Oil firms consider production-sharing terms high and current price cap clauses keep them from realizing benefits from price increases after contracts are signed. However, geology and exploration successes have overshadowed concerns.

  5. Angola: Energy Resources | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty EditCalifornia: Energy Resources JumpAnaconda, Montana: Energy| Open EnergyAngola:

  6. Antigua and Barbuda: Energy Resources | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty EditCalifornia: Energy Resources JumpAnaconda, Montana:InformationAntigua and

  7. Antigua and Barbuda: Energy Resources | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty EditCalifornia: Energy Resources JumpAnaconda, Montana:InformationAntigua

  8. Crude Existence: The Politics of Oil in Northern Angola

    E-Print Network [OSTI]

    Reed, Kristin

    2009-01-01T23:59:59.000Z

    instalações específicas da PIR. Jornal de Angola, June 27.the rapid intervention police (PIR) in the municipality at aassured civilians that the PIR’s mission in Soyo would be “

  9. Crude Existence: The Politics of Oil in Northern Angola

    E-Print Network [OSTI]

    Reed, Kristin

    2009-01-01T23:59:59.000Z

    iolence as Angola nears peak oil production and a widerproduction cuts may forestall peak oil by a few years, butAngolan oil production capacity is expected to peak between

  10. Crude Existence: The Politics of Oil in Northern Angola

    E-Print Network [OSTI]

    Reed, Kristin

    2009-01-01T23:59:59.000Z

    aimed at securing oil resources in the Gulf of Guinea (of (as yet unproven) oil resources in Angola (EIA 2008; Lylemost valuable natural resource: oil. But oil extraction—both

  11. Crude Existence: The Politics of Oil in Northern Angola

    E-Print Network [OSTI]

    Reed, Kristin

    2009-01-01T23:59:59.000Z

    Petroleum. 2007a. Angola LNG: A Lesson in How to Win Friendsand Zoe Eisenstein. 2004. LNG Plants Seed of Hope in Soyo.a liquefied natural gas (LNG) plant to process and export

  12. National Science Foundation, Lake Hoare, Antarctica | Department...

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

    National Science Foundation, Lake Hoare, Antarctica National Science Foundation, Lake Hoare, Antarctica Photo of a Photovoltaic System Located at Lake Hoare, Antarctica Lake Hoare...

  13. Angola, New York: Energy Resources | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcat Place:Alvan2809328°,Anfu Guanshan HydropowerTexas:Angola on

  14. antarctica terra antartica: Topics by E-print Network

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

    abundance in the Ross Sea: An alternative explanation CiteSeer Summary: The southwestern Ross Sea (Antarctica) supports a large bloom of Phaeocystis antarctica in the Ross...

  15. antarctica: Topics by E-print Network

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

    projection parcelled polar regions between projecting lobes. A series of Eckert Equal-Area images attenuated the earth into a neat oval track; Antarctica appeared as a smear on...

  16. Angola on the Lake, New York: Energy Resources | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcat Place:Alvan2809328°,Anfu Guanshan HydropowerTexas:Angola on the

  17. Earth Planets Space, 52, 329336, 2000 Rock magnetism of sediments in the Angola-Namibia upwelling system

    E-Print Network [OSTI]

    Yamazaki, Toshitsugu

    Earth Planets Space, 52, 329­336, 2000 Rock magnetism of sediments in the Angola-Namibia upwelling system with special reference to loss of magnetization after core recovery Toshitsugu Yamazaki1 , Peter A Magnetism, University of Minnesota, Minneapolis, MN 55455-0128, U.S.A. 3Hawaii Institute of Geophysics

  18. Bedmap2: improved ice bed, surface and thickness datasets for Antarctica

    E-Print Network [OSTI]

    2013-01-01T23:59:59.000Z

    Antarctica (MOA) image map: Digital media, National Snow andmodel of Antarctica: Digital media, National Snow and IceThickness, 2009–2011: Digital media, NASA Distributed Active

  19. antarctica glacier etude: Topics by E-print Network

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

    Andrew G. 7 Plio-Pleistocene history of Ferrar Glacier, Antarctica: Implications for climate and ice sheet stability Geosciences Websites Summary: The areal distribution and...

  20. Antarctica: measuring glacier velocity from satellite images

    SciTech Connect (OSTI)

    Lucchitta, B.K.; Ferguson, H.M.

    1986-11-28T23:59:59.000Z

    Many Landsat images of Antarctica show distinctive flow and crevasse features in the floating part of ice streams and outlet glaciers immediately below their grounding zones. Some of the features, which move with the glacier or ice stream, remain visible over many years and thus allow time-lapse measurements of ice velocities. Measurements taken from Landsat images of features on Byrd Glacier agree well with detailed ground and aerial observations. The satellite-image technique thus offers a rapid and cost-effective method of obtaining average velocities, to a first order of accuracy, of many ice streams and outlet glaciers near their termini.

  1. Epicormic Schoots in a Permian Gymnosperm from Antarctica

    E-Print Network [OSTI]

    Decombeix, Anne-Laure; Taylor, Edith L.; Taylor, Thomas N.

    2010-01-01T23:59:59.000Z

    Two anatomically preserved gymnosperm trunks with clusters of epicormic shoots are described from the Late Permian of Antarctica. The best-preserved trunk is 14 cm long. It has a small circular parenchymatous pith and 9 ...

  2. antarctica chamisso hariot: Topics by E-print Network

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

    projection parcelled polar regions between projecting lobes. A series of Eckert Equal-Area images attenuated the earth into a neat oval track; Antarctica appeared as a smear on...

  3. antarctica soils studied: Topics by E-print Network

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

    C. Deser Y. Okumura; D. P. Schneider 2010-01-01 371 Changes in atmospheric heavy metals and metalloids in Dome C (East Antarctica) ice back to 672.0 kyr BP (Marine...

  4. Tropical Pacific Influence on the Source and Transport of Marine Aerosols to West Antarctica

    E-Print Network [OSTI]

    Criscitiello, Alison S.

    The climate of West Antarctica is strongly influenced by remote forcing from the tropical Pacific. For example, recent surface warming over West Antarctica reflects atmospheric circulation changes over the Amundsen Sea, ...

  5. Submarine geomorphology of Eastern Ross Sea and Sulzberger Bay, Antarctica

    E-Print Network [OSTI]

    Lepley, Larry Kent

    1964-01-01T23:59:59.000Z

    SUBMARINE GEOMORPHOLOGY OF EASTERN ROSS SEA AND SULZBERGER BAY, ANTARCTICA A Thocis By Submitted to the Graduate College of the Texas A 6 H Universicy in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE lanum...- ': Bsfhpeotrg l. Outer Snelf ?. ? Q ? ~elf =Bepr eeoione 3. inner Shelf 4~ B id gee S ed haunts l. Antaratic Uorine Sedhaento B seclhnents of Eastern Rom ssa - suleborgsr Boy Dissuasion Outer Shelf a. Ihwtstio, Xsostatio, snd Qlaoia1 Sister@ b. ?h igin...

  6. ANTARCIC.XLS HerculesNeve(VictoriaLand,EastAntarctica)

    E-Print Network [OSTI]

    Short, Daniel

    Antarctica(ng cm-' yf ') Ave (Tyr-) (Tyi') (Tvr') Year AustralianPb Consumption FluxPb (petrol) BrazilianPb Consumption (petrol) Aus.+Braz.Pb Consumption (petrol) 1991 I OOn 1989 1988 1987 I 986 1985 1984 0 0 . 1 0.2 0 19841988 1987 Year ---{- FluxPb --o--Aus.+Braz.PbConsumption(petrol) ANTARCIC.XLS 1986 1985 #12;

  7. ancianos cuba 2003-2005: Topics by E-print Network

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

    (Di Giovine 2009) that spreads over the world Tanaka, Maki 2011-01-01 85 Angola Croatia Iceland Nepal Sri Lanka Antigua & Barbuda Cuba India Netherlands St. Kitts & Nevis...

  8. agropecuarioen matanzas cuba: Topics by E-print Network

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

    (Di Giovine 2009) that spreads over the world Tanaka, Maki 2011-01-01 55 Angola Croatia Iceland Nepal Sri Lanka Antigua & Barbuda Cuba India Netherlands St. Kitts & Nevis...

  9. International 31st March 2014

    E-Print Network [OSTI]

    Davies, Christopher

    Canary Islands Cape Verde Cayman Islands Central African Republic Ceuta Chad Chile Afghanistan Aland Islands Albania Algeria Andorra Angola Anguilla Antigua / Barbuda Argentina Armenia Aruba Ascension Island Australia Austria Azerbaijan Bahamas

  10. Climatology of katabatic winds in the McMurdo dry valleys, southern Victoria Land, Antarctica

    E-Print Network [OSTI]

    Fountain, Andrew G.

    Climatology of katabatic winds in the McMurdo dry valleys, southern Victoria Land, Antarctica of katabatic winds largely controls winter (June to August) temperatures, increasing 1°C per 1% increase of katabatic winds in the McMurdo dry valleys, southern Victoria Land, Antarctica, J. Geophys. Res., 109, D

  11. ESTIMATION OF SNOW ACCUMULATION IN ANTARCTICA USING AUTOMATED ACOUSTIC DEPTH GAUGE MEASUREMENTS

    E-Print Network [OSTI]

    Wisconsin at Madison, University of

    ESTIMATION OF SNOW ACCUMULATION IN ANTARCTICA USING AUTOMATED ACOUSTIC DEPTH GAUGE MEASUREMENTS microwave sounders, snow gauges, or radar are not feasible or not available in Antarctica at the present precipitation, remains largely unknown. Acoustic depth gauges (ADG) provide the only concrete real

  12. The effect of substrate structure on the chemoselectivity of Candida1 antarctica lipase B-catalyzed acylation of amino-alcohols2

    E-Print Network [OSTI]

    Boyer, Edmond

    challenge. The current work describes the different15 behavior shown by Candida antarctica lipase B (Novozym

  13. Accidents and opportunities: a history of the radio echo-sounding of Antarctica, 1958-79 

    E-Print Network [OSTI]

    Siegert, Martin; Turchetti, S.; Dean, K.; Naylor, S.

    2008-01-01T23:59:59.000Z

    This paper explores the history of radio echo-sounding (RES), a technique of glaciological surveying that from the late 1960s has been used to examine Antarctica's sub-glacial morphology. Although the origins of RES can ...

  14. Secondary Growth in Vertebraria Roots from the Late Permian of Antarctica: A Change in Developmental Timing

    E-Print Network [OSTI]

    Decombeix, Anne-Laure; Taylor, Edith L.; Taylor, Thomas N.

    2009-06-01T23:59:59.000Z

    Permineralized Vertebraria roots from the late Permian of the Central Transantarctic Mountains, Antarctica, are investigated to understand the unusual vascular anatomy of the genus. The specimens range from ?1 mm to several ...

  15. antarctica y000027 y000097: Topics by E-print Network

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

    projection parcelled polar regions between projecting lobes. A series of Eckert Equal-Area images attenuated the earth into a neat oval track; Antarctica appeared as a smear on...

  16. Incorporation of particulates into accreted ice above subglacial Vostok lake, Antarctica 

    E-Print Network [OSTI]

    Siegert, M. J.; Royston-Bishop, G.; Priscu, J. C.; Tranter, M.; Christner, B.; Lee, V.

    2005-01-01T23:59:59.000Z

    The nature of microscopic particulates in meteoric and accreted ice from the Vostok (Antarctica) ice core is assessed in conjunction with existing ice-core data to investigate the mechanism by which particulates are ...

  17. Ice Shelf Water plume flow beneath Filchner-Ronne Ice Shelf, Antarctica

    E-Print Network [OSTI]

    Feltham, Daniel

    the thinning of Pine Island Glacier in West Antarctica and the collapse of parts of the Larsen Ice Shelf temperature variation is called the ``ice pump'' [Lewis and Perkin, 1983; Jenkins and Bombosch, 1995]. [5

  18. MONITORING STRATIFICATION AND CURRENTS AT THE CONTINENTAL SLOPE OF THE SCOTIA SEA, ANTARCTICA 

    E-Print Network [OSTI]

    Thornton, Melanie 1989-

    2011-05-02T23:59:59.000Z

    fulfillment of the requirements for the designation as UNDERGRADUATE RESEARCH SCHOLAR A Senior Scholars Thesis by MELANIE R. THORNTON MONITORING STRATIFICATION AND CURRENTS AT THE CONTINENTAL SLOPE OF THE SCOTIA SEA, ANTARCTICA Approved by... of the requirements for the designation as UNDERGRADUATE RESEARCH SCHOLAR A Senior Scholars Thesis by MELANIE R. THORNTON iii ABSTRACT Monitoring Stratification and Currents at the Continental Slope of the Scotia Sea, Antarctica. (April 2011...

  19. Ice-induced enhancement of solar radiation beneath overcast skies near Antarctica

    E-Print Network [OSTI]

    Horvath, Nicholas Charles

    1981-01-01T23:59:59.000Z

    ICE-INDUCED ENHANCEMENT OF SOLAR RADIATION BENEATH OVERCAST SKIES NEAR ANTARCTICA A Thesis by NICHOLAS CHARLES HORVATH Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree... of MASTER OF SCIFNCE May 1981 Major Subject: Meteorology ICE-INDUCED ENHANCEMENT OF SOLAR RADIATION BENEATH OVERCAST SKIES NEAR ANTARCTICA A Thesis by NICHOLAS CHARLES HORVATH Approsed as to style and content by: (Ch irman of Committee) (Member...

  20. Modelling of mineral dust for interglacial and glacial climate conditions with a focus on Antarctica

    SciTech Connect (OSTI)

    Sudarchikova, Natalia; Mikolajewicz, Uwe; Timmreck, C.; O'Donnell, D.; Schurgers, G.; Sein, Dmitry; Zhang, Kai

    2015-01-01T23:59:59.000Z

    Mineral dust cycle responds to insolation-induced climate change and plays an important role in the climate system by affecting the radiative balance of the atmosphere. Polar ice cores provide unique information about deposition of aeolian dust particles in the past which indicates climate variability. In the current study the dust cycle in different climate conditions simulated by ECHAM5-HAM is analyzed. The study is focused on the Southern Hemisphere with emphasis on the Antarctic region. The investigated periods include four interglacial time-slices: the pre-industrial control (CTRL), mid-Holocene (6,000 years BP), Eemian (126,000 years BP), last glacial inception (115,000 years BP) and one glacial time interval: Last Glacial Maximum (LGM) (21,000 years BP). This study is a first attempt to simulate past interglacial dust cycles and to understand the quantitative contribution of different processes, such as emission, atmospheric transport and precipitation to the total dust deposition in Antarctica. Results suggest increased deposition of mineral dust globally and in Antarctica in the past interglacial periods relative to the preindustrial CTRL simulation. Maximum dust deposition in Antarctica was simulated for the glacial period. One of the major factors responsible for the increase of dust deposition in the mid-Holocene and Eemian is enhanced Southern Hemisphere dust emissions. The moderate change of dust deposition in Antarctica in the last glacial inception period is caused by the slightly stronger poleward atmospheric transport efficiency compared to the pre-industrial. In the LGM simulation, dust deposition over Antarctica is substantially increased due to 2.6 times higher Southern Hemisphere dust emissions, 2 times stronger atmospheric transport towards Antarctica, and 30% weaker precipitation over the Southern Ocean. The model is able to reproduce the order of magnitude of dust deposition globally and in Antarctica for the pre-industrial and LGM climate. However more records are needed to validate simulated dust deposition for the past interglacial time-slices.

  1. High-resolution variations in size, number and arrangement of air bubbles in the EPICA DML (Antarctica) ice core

    E-Print Network [OSTI]

    Garbe, Christoph S.

    (Antarctica) ice core Verena BENDEL,1Ã Kai J. UELTZHO¨ FFER,2 Johannes FREITAG,3 Sepp KIPFSTUHL,3 Werner F bubbles in the EPICA Dronning Maud Land (EDML) (Antarctica) ice core, down to the end of the bubble with the palaeo-temperature proxy, dd18 O, and the dust concentration, which means that in Holocene ice

  2. Site testing for submillimetre astronomy at Dome C, Antarctica

    E-Print Network [OSTI]

    Tremblin, P; Schneider, N; Durand, G Al; Ashley, M C B; Lawrence, J S; Luong-Van, D M; Storey, J W V; Durand, G An; Reinert, Y; Veyssiere, C; Walter, C; Ade, P; Calisse, P G; Challita, Z; Fossat, E; Sabbatini, L; Pellegrini, A; Ricaud, P; Urban, J

    2011-01-01T23:59:59.000Z

    Over the past few years a major effort has been put into the exploration of potential sites for the deployment of submillimetre astronomical facilities. Amongst the most important sites are Dome C and Dome A on the Antarctic Plateau, and the Chajnantor area in Chile. In this context, we report on measurements of the sky opacity at 200 um over a period of three years at the French-Italian station, Concordia, at Dome C, Antarctica. We also present some solutions to the challenges of operating in the harsh polar environ- ment. Dome C offers exceptional conditions in terms of absolute atmospheric transmission and stability for submillimetre astron- omy. Over the austral winter the PWV exhibits long periods during which it is stable and at a very low level (0.1 to 0.3 mm). Higher values (0.2 to 0.8 mm) of PWV are observed during the short summer period. Based on observations over three years, a transmission of around 50% at 350 um is achieved for 75% of the time. The 200-um window opens with a typical transmission...

  3. Antarctica X-band MiniSAR crevasse detection radar : final report.

    SciTech Connect (OSTI)

    Sander, Grant J.; Bickel, Douglas Lloyd

    2007-09-01T23:59:59.000Z

    This document is the final report for the Antarctica Synthetic Aperture Radar (SAR) Project. The project involved the modification of a Sandia National Laboratories MiniSAR system to operate at X-band in order to assess the feasibility of an airborne radar to detect crevasses in Antarctica. This radar successfully detected known crevasses at various geometries. The best results were obtained for synthetic aperture radar resolutions of at most one foot and finer. In addition to the main goal of detecting crevasses, the radar was used to assess conops for a future operational radar. The radar scanned large areas to identify potential safe landing zones. In addition, the radar was used to investigate looking at objects on the surface and below the surface of the ice. This document includes discussion of the hardware development, system capabilities, and results from data collections in Antarctica.

  4. Developing a coupled ice flow, meltwater plume model to study Developing a coupled ice flow, meltwater plume model to study interactions beneath ice shelves off the coast of West Antarctica.interactions beneath ice shelves off the coast of West Antarctica

    E-Print Network [OSTI]

    , meltwater plume model to study interactions beneath ice shelves off the coast of West Antarctica.interactions beneath ice shelves off the coast of West Antarctica. Victoria Lee1 (v.lee@bristol.ac.uk), Tony Payne1 on the Antarctic Ice Sheet. Observational studies have shown that ice shelves off the coast of West Antarctica

  5. Don Juan Pond, Antarctica: Near-surface CaCl2-brine feeding Earth's most saline

    E-Print Network [OSTI]

    Marchant, David R.

    Don Juan Pond, Antarctica: Near-surface CaCl2-brine feeding Earth's most saline lake lineae (RSL), thought to represent seasonal brines, has sparked interest in analogous environments watershed and show that this, together with small amounts of meltwater, are capable of generating brines

  6. Pleistocene ice and paleo-strain rates at Taylor Glacier, Antarctica S.M. Aciego a

    E-Print Network [OSTI]

    Severinghaus, Jeffrey P.

    Pleistocene ice and paleo-strain rates at Taylor Glacier, Antarctica S.M. Aciego a , K.M. Cuffey b September 2006 Abstract Ice exposed in ablation zones of ice sheets can be a valuable source of samples for paleoclimate studies and information about long-term ice dynamics. We report a 28-km long stable isotope

  7. New velocity map and mass-balance estimate of Mertz Glacier, East Antarctica, derived from Landsat

    E-Print Network [OSTI]

    Berthier, Etienne

    streams hasbeen measured recently. Pine Island Glacier accelerated by 18 Æ2% between 1992 and 2000 (Rignot-moving glaciers. Repeat visible or near-infrared images of the same area can be used to track the displace- mentNew velocity map and mass-balance estimate of Mertz Glacier, East Antarctica, derived from Landsat

  8. Eocene circulation of the Southern Ocean: Was Antarctica kept warm by subtropical waters?

    E-Print Network [OSTI]

    Döös, Kristofer

    climate model simulations. We find that the EAC did not penetrate to high latitudes and ocean heatEocene circulation of the Southern Ocean: Was Antarctica kept warm by subtropical waters? Matthew suddenly grew and ocean productivity patterns changed. Previous studies conjectured that poleward

  9. Viscous flow lobes in central Taylor Valley, Antarctica: Origin as remnant buried glacial ice

    E-Print Network [OSTI]

    Marchant, David R.

    its terminus, the ESL flows at a rate of 2.4 to 6.7 mm a-1 . The loose drift that caps the buried ice temperatures show that intermittent melting is most likely possible during summer months where buried ice is 35Viscous flow lobes in central Taylor Valley, Antarctica: Origin as remnant buried glacial ice Kate

  10. Inferring surface heat flux distributions guided by a global seismic model: particular application to Antarctica

    E-Print Network [OSTI]

    Shapiro, Nikolai

    -flow measurements are rare or entirely absent. This will result in a smooth global heat-flow map that may proveInferring surface heat flux distributions guided by a global seismic model: particular application to Antarctica Nikolai M. Shapiro*, Michael H. Ritzwoller Department of Physics, Center for Imaging the Earth

  11. The bipolar diatoms Thalassiosira antarctica Comber and Porosira glacialis (Grun) J2rg.: morphology and autecology of disjunct populations

    E-Print Network [OSTI]

    Villareal, Tracy Alan

    1981-01-01T23:59:59.000Z

    antarctica Karsten Frenguellip 1960 Amh~ ~k'll '' . t' lt (G . )Cl. ~GA E *I d' Ot p Pd ' h d . El I G'' Thalassiosira heshing (Grun. ) Gran A~t*hl hk''Eh Triceratium arcticum Brightwell Rhizosolenia alata f, inermis (Castr. ) Rust. Hasle, 1976... Thalassiosira antarctica Comber P ' El ' I' (G . ) Jd E. If't* h' ~ uf' d d(G . ) E I 10 Expedition (Table 1). Neither author speculated on the origin of the disjunct populations. Hasle and Heimdal (1968) added Thalassiosira antarctica Comber to the list...

  12. The bipolar diatoms Thalassiosira antarctica Comber and Porosira glacialis (Grun) J2rg.: morphology and autecology of disjunct populations 

    E-Print Network [OSTI]

    Villareal, Tracy Alan

    1981-01-01T23:59:59.000Z

    antarctica Karsten Frenguellip 1960 Amh~ ~k'll '' . t' lt (G . )Cl. ~GA E *I d' Ot p Pd ' h d . El I G'' Thalassiosira heshing (Grun. ) Gran A~t*hl hk''Eh Triceratium arcticum Brightwell Rhizosolenia alata f, inermis (Castr. ) Rust. Hasle, 1976... Thalassiosira antarctica Comber P ' El ' I' (G . ) Jd E. If't* h' ~ uf' d d(G . ) E I 10 Expedition (Table 1). Neither author speculated on the origin of the disjunct populations. Hasle and Heimdal (1968) added Thalassiosira antarctica Comber to the list...

  13. Ultra-low rare earth element content in accreted ice from sub-glacial Lake Vostok, Antarctica

    E-Print Network [OSTI]

    Howat, Ian M.

    Ultra-low rare earth element content in accreted ice from sub-glacial Lake Vostok, Antarctica Paolo. We suggest that such ultra-low concentrations are unlikely to be representative of the real REE

  14. Environmental effects of the US Antarctic Program`s use of balloons in Antarctica

    SciTech Connect (OSTI)

    McCold, L.N.; Eddlemon, G.K.; Blasing, T.J.

    1995-06-01T23:59:59.000Z

    The USAP uses balloons in Antarctica to conduct scientific research, to facilitate safe air transport, and to provide data for global weather predictions. However, there is the possibility that balloons or their payloads may adversely affect Antarctic fauna or flora. The purpose of this study is to provide background information upon which the USAP may draw when complying with its responsibilities under the National Environmental Policy Act of 1969, the Antarctic Treaty, and the Madrid Protocol.

  15. The transition zone between the oceanic and shelf regimes around Antarctica

    E-Print Network [OSTI]

    Kim, Seong-Joong

    1995-01-01T23:59:59.000Z

    of MASTER OF SCIENCE Approved as to style and content by: Worth D, No in, Jr. (Co-Chair of Committee) Thomas Whitworth 111 (Co-Chair of Committee) Daren B, H. Cline (Member) David A. Brooks (Head of Department) August 1995 Major Subject...: Oceanography ABSTRACT The Transition Zone between the Oceanic and Shelf Regimes around Antarctica. (August 1995) Seong-Joong Kim, B. S. , Chungnam National Universtty Co-Chairs of Advisory Committee: Dr. Worth D. Nowlin, Jr. Dr. Thomas Whitworth 111...

  16. The Possible Pollen Cone of the Late Triassic Conifer Heidiphyllum/Telemachus (Voltziales) From Antarctica

    E-Print Network [OSTI]

    Bomfleur, Benjamin; Serbet, Rudolph; Taylor, Edith L.; Taylor, Thomas N.

    2011-01-01T23:59:59.000Z

    with the permission of the publisher. The original published version can be found at the link below. Bomfleur, B., Serbet, R., Taylor, E., and Taylor, N. 2011. The Possible Pollen Cone of the Late Triassic Conifer Heidiphyllum/Telemachus (Voltziales) From... Formgattungen peltater ma¨nnlicher Koniferenblu¨ten. Senckenbergiana Lethaea, 60, 1–37. HERMSEN, E.J., TAYLOR, T.N. & TAYLOR, E.L. 2007. A voltzialean pollen cone from the Triassic of Antarctica. Review of Palaeobotany and Palynology, 144, 113–122. KYLE, R...

  17. Submm/FIR astronomy in Antarctica: Potential for a large telescope facility

    E-Print Network [OSTI]

    Vincent Minier; V. Minier; L. Olmi; P. -O. Lagage; L. Spinoglio; G. A. Durand; E. Daddi; D. Galilei; H. Gallee; C. Kramer; D. Marrone; E. Pantin; L. Sabbatini; N. Schneider; N. Tothill; L. Valenziano; C. Veyssiere

    2008-05-16T23:59:59.000Z

    Preliminary site testing datasets suggest that Dome C in Antarctica is one of the best sites on Earth for astronomical observations in the 200 to 500 micron regime, i.e. for far-infrared (FIR) and submillimetre (submm) astronomy. We present an overview of potential science cases that could be addressed with a large telescope facility at Dome C. This paper also includes a presentation of the current knowledge about the site characterics in terms of atmospheric transmission, stability, sky noise and polar constraints on telescopes. Current and future site testing campaigns are finally described.

  18. Observations of unusual fast-ice conditions in the southwest Ross Sea, Antarctica: preliminary analysis of iceberg and

    E-Print Network [OSTI]

    Boyce, C. Kevin

    ice (referred to as pack ice) which had several days earlier been part of the integrated AnnalsObservations of unusual fast-ice conditions in the southwest Ross Sea, Antarctica: preliminary of their presence, extensive landfast sea ice (fast ice) waxed and waned along the Victoria Land coast, with maximum

  19. The Earth Institute, Columbia University8 annual donor report 2010 9 the ice sheets of antarctica are not

    E-Print Network [OSTI]

    The Earth Institute, Columbia University8 annual donor report 2010 9 the ice sheets of antarctica research scientist at the Lamont- Doherty Earth Observatory. In order to model the fate of polar ice sheets cheaply. Secrets Beneath the Ice Experts at the Lamont-Doherty Earth Observatory, including senior

  20. THE PRECIPITATION REGIME OF DRONNING MAUD LAND, ANTARCTICA, DERIVED FROM AMPS (ANTARCTIC MESOSCALE PREDICTION SYSTEM) ARCHIVE DATA

    E-Print Network [OSTI]

    Schlosser, Elisabeth

    THE PRECIPITATION REGIME OF DRONNING MAUD LAND, ANTARCTICA, DERIVED FROM AMPS (ANTARCTIC MESOSCALE. Manning2) 1) Institute of Meteorology and Geophysics, University of Innsbruck, Austria 2) Mesoscale the temporal and spatial distribution of precipitation in DML using AMPS (Antarctic Mesoscale Prediction System

  1. Molecular mechanism of the hydration of Candida antarctica1 lipase B in gas phase: water adsorption isotherms and molecular2

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Molecular mechanism of the hydration of Candida antarctica1 lipase B in gas phase: water and selectivity of enzymes in organic solvents or33 in gas phase. The molecular mechanism of the hydration - 2919" DOI : 10.1002/cbic.200900544 #12;2 ABSTRACT32 Hydration is a major determinant of activity

  2. Electric Vehicle Performance at McMurdo Station (Antarctica) and Comparison with McMurdo Station Conventional Vehicles

    SciTech Connect (OSTI)

    Sears, T.; Lammert, M.; Colby, K.; Walter, R.

    2014-09-01T23:59:59.000Z

    This report examines the performance of two electric vehicles (EVs) at McMurdo, Antarctica (McMurdo). The study examined the performance of two e-ride Industries EVs initially delivered to McMurdo on February 16, 2011, and compared their performance and fuel use with that of conventional vehicles that have a duty cycle similar to that of the EVs used at McMurdo.

  3. In situ radioglaciological measurements near Taylor Dome, Antarctica and implications for UHE neutrino astronomy

    E-Print Network [OSTI]

    D. Besson; J. Jenkins; S. Matsuno; J. Nam; M. Smith; S. W. Barwick; J. J. Beatty; W. R. Binns; C. Chen; P. Chen; J. M. Clem; A. Connolly; P. F. Dowkontt; M. A. DuVernois; R. C. Field; D. Goldstein; P. W. Gorham; A. Goodhue; C. Hast; C. L. Hebert; S. Hoover; M. H. Israel; J. Kowalski; J. G. Learned; K. M. Liewer; J. T. Link; E. Lusczek; B. Mercurio; C. Miki; P. Miocinovic; C. J. Naudet; J. Ng; R. Nichol; K. Palladino; K. Reil; A. Romero-Wolf; M. Rosen; L. Ruckman; D. Saltzberg; D. Seckel; G. S. Varner; D. Walz; F. Wu

    2008-10-07T23:59:59.000Z

    Radiowave detection of the Cherenkov radiation produced by neutrino-ice collisions requires an understanding of the radiofrequency (RF) response of cold polar ice. We herein report on a series of radioglaciological measurements performed approximately 10 km north of Taylor Dome Station, Antarctica from Dec. 6, 2006 - Dec. 16, 2006. Using RF signals broadcast from: a) an englacial discone, submerged to a depth of 100 meters and broadcasting to a surface dual polarization horn receiver, and b) a dual-polarization horn antenna on the surface transmitting signals which reflect off the underlying bed and back up to the surface receiver, we have made time-domain estimates of both the real (index-of-refraction) and imaginary (attenuation length) components of the complex ice dielectric constant. We have also measured the uniformity of ice response along two orthogonal axes in the horizontal plane. We observe a wavespeed asymmetry of order 0.1%, projected onto the vertical propagation axis, consistent with some previous measurements, but somewhat lower than others.

  4. In situ radioglaciological measurements near Taylor Dome, Antarctica and implications for UHE neutrino astronomy

    E-Print Network [OSTI]

    Besson, D; Matsuno, S; Nam, J; Smith, M

    2007-01-01T23:59:59.000Z

    Radiowave detection of the Cherenkov radiation produced by neutrino-ice collisions requires an understanding of the radiofrequency (RF) response of cold polar ice. We herein report on a series of radioglaciological measurements performed approximately 10 km north of Taylor Dome Station, Antarctica from Dec. 6, 2006 - Dec. 16, 2006. Using RF signals broadcast from: a) an englacial discone, submerged to a depth of 100 meters and broadcasting to a surface dual polarization horn receiver, and b) a dual-polarization horn antenna on the surface transmitting signals which reflect off the underlying bed and back up to the surface receiver, we have made time-domain estimates of both the real (index-of-refraction) and imaginary (attenuation length) components of the complex ice dielectric constant. We have also measured the uniformity of ice response along two orthogonal axes in the horizontal plane. We observe a wavespeed asymmetry of order 0.1%, projected onto the vertical propagation axis, consistent with some previ...

  5. Structural redesign of lipase B from Candida antarctica by circular permutation and incremental truncation.

    SciTech Connect (OSTI)

    Qian, Zhen; Horton, John R.; Cheng, Xiadong; Lutz, Stefan; Emory

    2009-11-02T23:59:59.000Z

    Circular permutation of Candida antarctica lipase B yields several enzyme variants with substantially increased catalytic activity. To better understand the structural and functional consequences of protein termini reorganization, we have applied protein engineering and x-ray crystallography to cp283, one of the most active hydrolase variants. Our initial investigation has focused on the role of an extended surface loop, created by linking the native N- and C-termini, on protein integrity. Incremental truncation of the loop partially compensates for observed losses in secondary structure and the permutants temperature of unfolding. Unexpectedly, the improvements are accompanied by quaternary-structure changes from monomer to dimer. The crystal structures of one truncated variant (cp283{Delta}7) in the apo-form determined at 1.49 {angstrom} resolution and with a bound phosphonate inhibitor at 1.69 {angstrom} resolution confirmed the formation of a homodimer by swapping of the enzyme's 35-residue N-terminal region. Separately, the new protein termini at amino acid positions 282/283 convert the narrow access tunnel to the catalytic triad into a broad crevice for accelerated substrate entry and product exit while preserving the native active-site topology for optimal catalytic turnover.

  6. The bipolar diatoms Thalassiosira antarctica Comber and Porosira glacialis: comparative ultrastructure and physiology of vegetative and resting stages of disjunct populations 

    E-Print Network [OSTI]

    Doucette, Gregory John

    1982-01-01T23:59:59.000Z

    DISCUSSION 116 T. antarctica P, g1 1 ~ 1 1 Note on Diatom Taxonomy R ti g SP 1 ti 1 t ~tti Comparative Physiology of T. antarctica Vegetative and Resting Stages 116 142 154 157 163 SUMMARY 182 LITERATURE CITED 185 VITA 207 LIST OF TABLES Table... in method of reproduction, along with other arguments in support of a link between the centric and pennate diatoms (Hasle, 1973; Ross E Sims, 1973), have lead to a questioning of the validity of this division. Simonsen (1979), although acknowledging...

  7. antigua mina enrique: Topics by E-print Network

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

    Too Many Minas Spoil The Con Texas A&M University - TxSpace Summary: 't write proper porn. There's more to it than just the penis. I mean, erotica. Not porn. Um, sorry. That was...

  8. Copa Lycurgus (antigua Roma) Breve historia de la Nanotecnologa

    E-Print Network [OSTI]

    Muiño, Ricardo Díez

    Nanotecnología El Ministerio japonés de Economía, Comercio e Industria MITI anuncia la bottom-up "atom factory descubren los nanotubos de Carbono Primer informe sobre nanotecnología realizado por la casa Blanca El libro million in California Primer informe sobre la industria nanotecnológica Llamamiento de las Academias

  9. MHK Projects/Seatricity Antigua | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, searchOf KilaueaInformationCygnet.7413°,Scotlandville Bend

  10. Antigua and Barbuda-Regional Implementation Plan for CARICOM's Climate

    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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcat Place:Alvan2809328°,AnfuNorth,OpenAntarisChange Resilience

  11. Antigua and Barbuda-Caribbean Community (CARICOM) Sustainable Energy

    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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual Siteof EnergyInnovation in Carbon Capture and SequestrationAnemoiAnoka Electric

  12. Crude Existence: The Politics of Oil in Northern Angola

    E-Print Network [OSTI]

    Reed, Kristin

    2009-01-01T23:59:59.000Z

    threatening to onshore oil investments in Cabinda. It usedto a $2.2 billion oil and gas investment in Block 14. Oil,the full burden of capital investment, oil corporations also

  13. Crude Existence: The Politics of Oil in Northern Angola

    E-Print Network [OSTI]

    Reed, Kristin

    2009-01-01T23:59:59.000Z

    2005. Bassey, Nnimmo. 2000. “Oil and Gas in Africa. ” Paperat the Gulf of Guinea Oil and Gas Conference. February 5 –6,Mercury from Discharges from Oil and Gas Platforms. http://

  14. Crude Existence: The Politics of Oil in Northern Angola

    E-Print Network [OSTI]

    Reed, Kristin

    2009-01-01T23:59:59.000Z

    Gladstone. Australian Petroleum Production and ExplorationImpacts of Petroleum Production: Initial Results from thesubsistence. “To us, petroleum production is more for those

  15. Crude Existence: The Politics of Oil in Northern Angola

    E-Print Network [OSTI]

    Reed, Kristin

    2009-01-01T23:59:59.000Z

    waged for control of oil reserves. A brutal war wracked theguarantee rights to the oil reserves, offer an opportunitygles over control of oil reserves, but it also encompasses

  16. Crude Existence: The Politics of Oil in Northern Angola

    E-Print Network [OSTI]

    Reed, Kristin

    2009-01-01T23:59:59.000Z

    tion. A drop in world oil prices, coupled with a decrease indisbursements declined and oil prices dropped sharply inThe drastic drop in oil prices and further agricultural

  17. Crude Existence: The Politics of Oil in Northern Angola

    E-Print Network [OSTI]

    Reed, Kristin

    2009-01-01T23:59:59.000Z

    and ranks 17th in crude oil production globally (EIA 2008).the country’s crude oil production averaged only 157,770s production of nearly 2 million barrels of crude oil per

  18. Crude Existence: The Politics of Oil in Northern Angola

    E-Print Network [OSTI]

    Reed, Kristin

    2009-01-01T23:59:59.000Z

    www.int.iol.co.za. ———. 2004b. Heavy Oil Slick Oozes ontoThat Converts Ultra-Heavy Oil into Clean-Burning Fuel. Marchof heavy and ultra-heavy oil at the Richmond refinery (see

  19. Crude Existence: The Politics of Oil in Northern Angola

    E-Print Network [OSTI]

    Reed, Kristin

    2009-01-01T23:59:59.000Z

    impact of PAHs discharged in produced water should not bePAHs enter the marine environ- ment through the disposal of produced waterwater out of the formation. Mercury, zinc, cadmium, lead, and PAHs

  20. Crude Existence: The Politics of Oil in Northern Angola

    E-Print Network [OSTI]

    Reed, Kristin

    2009-01-01T23:59:59.000Z

    water Reserves. Oil and Gas Journal. 101(44):54. NovemberSteady Worldwide. Oil and Gas Journal. 101(44):49. November

  1. Angola-Nationally Appropriate Mitigation Actions (NAMAs) in the...

    Open Energy Info (EERE)

    Mitigation Actions (NAMAs) in the Congo Basin AgencyCompany Organization Environment Canada, International Institute for Sustainable Development (IISD) Sector Climate, Energy,...

  2. Crude Existence: The Politics of Oil in Northern Angola

    E-Print Network [OSTI]

    Reed, Kristin

    2009-01-01T23:59:59.000Z

    1998. Chevron Richmond Refinery to Pay $540,000. October15,Flournoy, Craig. 2000. Refinery Accidents, Anxiety Increase.City News. 2008. Study: Refinery Pollution Trapped in Homes.

  3. Crude Existence: The Politics of Oil in Northern Angola

    E-Print Network [OSTI]

    Reed, Kristin

    2009-01-01T23:59:59.000Z

    angop.ao. ———. 2004d. Governo concede regime aduaneiro eOctober 1. Folha 8. 2005a. Governo “deu” 80% da terra deLuanda: Imprensa Nacional. Governo Provincial de Cabinda.

  4. Crude Existence: The Politics of Oil in Northern Angola

    E-Print Network [OSTI]

    Reed, Kristin

    2009-01-01T23:59:59.000Z

    Mercury from Discharges from Oil and Gas Platforms. http://2003. “The Question of Oil and Gas, Its Impact on the SocialMore Deep- water Reserves. Oil and Gas Journal. 101(44):54.

  5. Crude Existence: The Politics of Oil in Northern Angola

    E-Print Network [OSTI]

    Reed, Kristin

    2009-01-01T23:59:59.000Z

    their next meal and huff petrol as a form of escape (Masonblowing up only a small petrol storage tank at the port, butThere was no soap, no petrol, nothing. [My sister and I

  6. Crude Existence: The Politics of Oil in Northern Angola

    E-Print Network [OSTI]

    Reed, Kristin

    2009-01-01T23:59:59.000Z

    Remain Stable Despite Oil Production Cut. Octo- ber25.Chevron Expects Daily Oil Production of 620,000 Barrels in2008f. Oil Production Reaches 1.9 Million Barrels Per Day.

  7. Crude Existence: The Politics of Oil in Northern Angola

    E-Print Network [OSTI]

    Reed, Kristin

    2009-01-01T23:59:59.000Z

    Holing 1990:29,24). Oil pollution also presents a threat toof the dangers of oil pollution” (Sonangol 2005). Thebearing the toxic burden of oil pollution. Ironically, these

  8. Crude Existence: The Politics of Oil in Northern Angola

    E-Print Network [OSTI]

    Reed, Kristin

    2009-01-01T23:59:59.000Z

    varieties are favored. Synthetic-based muds are less solublerisk. Safer synthetic drilling muds are widely available butof water-based barite muds and synthetic drilling fluids at

  9. Ablation on Taylor Glacier, Antarctica

    E-Print Network [OSTI]

    Bliss, Andrew Knisely

    2011-01-01T23:59:59.000Z

    south of Taylor Glacier. White (cold) cloud streaks are alsosouth of Taylor Glacier. White (cold) cloud streaks are also

  10. Ablation on Taylor Glacier, Antarctica

    E-Print Network [OSTI]

    Bliss, Andrew Knisely

    2011-01-01T23:59:59.000Z

    ready to carry a set of solar panels up a hill for a GPSbeing charged by the solar panels. In the winter it remainedbatteries. Station 3’s solar panel failed in early October

  11. Molecular markers of antifolate resistance in Plasmodium falciparum isolates from Luanda, Angola

    E-Print Network [OSTI]

    2011-01-01T23:59:59.000Z

    Denoncin A, van Herp M, Balkan S, Dujardin JC, D’AlessandroD, Kwezi E, Priotto G, Balkan S, Bakyaita N, Brockman A,

  12. ‘Working the system’ : affect, amnesia and the aesthetics of power in the ‘New Angola’ 

    E-Print Network [OSTI]

    Schubert, Johannes Gabriel

    2014-07-01T23:59:59.000Z

    How political authority and legitimacy are sustained in societies marked by socio-economic inequality and political exclusion is a long-standing preoccupation in the social sciences. Since the end of its civil war in ...

  13. Characterization of organic matter in the Oligocene (Chattian) turbiditic fine grained deposits, offshore Angola

    E-Print Network [OSTI]

    Boyer, Edmond

    is discontinuous and produces layers of sediment in which OM quantity, type and diagenesis are heterogeneous (Cowie

  14. Regional tectonostratigraphy of the pre-salt in the Benguela-Namibe Basins, Angola

    E-Print Network [OSTI]

    Henderson, Gideon

    and Further Reading Brownfield, M.E. and Charpentier, R.R. (2006). Geology and total petroleum systems

  15. Angola-Nationally Appropriate Mitigation Actions (NAMAs) in the Congo Basin

    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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty EditCalifornia: Energy Resources JumpAnaconda, Montana: Energy| Open Energy

  16. National Science Foundation - Lake Hoare, Antarctica | Department...

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

    field site is conducted all summer and requires an energy source that does not cause pollution or engine noise. The photovoltaic system (PV) that was installed at this site is 1.2...

  17. Convex Approaches to Text Summarization

    E-Print Network [OSTI]

    Gawalt, Brian

    2012-01-01T23:59:59.000Z

    obama, reported violence, president, state, new, said, military, mr nigerian, nigerias, africa, kenya, angola, muslim,

  18. Sectoral trends in global energy use and greenhouse gas emissions

    E-Print Network [OSTI]

    2006-01-01T23:59:59.000Z

    Uzbekistan, Cyprus, Gibralta, Malta Antigua and Barbuda,Ireland, Italy, Luxembourg, Malta, Netherlands, Norway,

  19. admiralty bay antarctica: Topics by E-print Network

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

    E. Distefano; S. Messina; G. Cutispoto 2008-07-18 103 BAY AREA PARK RELATIONAL CREEK Computer Technologies and Information Sciences Websites Summary: BAY AREA PARK CODD...

  20. antarctica preliminary results: Topics by E-print Network

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

    Common oak (Quercus robur L) is one of the most valuable- an oak" is well known in Croatia and in world markets. However, difficulties with natural regeneration Paris-Sud XI,...

  1. Basal melt rates beneath Whillans Ice Stream, West Antarctica

    E-Print Network [OSTI]

    Beem, Lucas H.; Jezek, Ken C.; Van Der Veen, C. J.

    2010-08-05T23:59:59.000Z

    Basal water lubricates and enables the fast flow of the West Antarctic ice streams which exist under low gravitational driving stress. Identification of sources and rates of basal meltwater production can provide insight into the dynamics of ice...

  2. Surface Energy Balance of the Taylor Glacier, Antarctica

    E-Print Network [OSTI]

    Bliss, Andrew

    2005-01-01T23:59:59.000Z

    G. L. Dana. Surface energy balance and meltwater productionice sheet: a comparison of energy-balance and a degree-dayvariations in the surface energy balance of haut glacier d’

  3. antarctica larsen ice: Topics by E-print Network

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

    artificial and natural icing conditions MIT - DSpace Summary: Real-time measurements of ice growth during artificial and natural icing conditions were conducted using an...

  4. ardley island antarctica: Topics by E-print Network

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

    images were used to convey information about diverse planetary resources including food, energy, and minerals. Each topic was presented with overarching authority, in a myriad of...

  5. antarctica dry valley: Topics by E-print Network

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

    Astronomy conducted includes optical, IR, THz & sub-mm, measurements of the CMBR, solar, as well as high energy astrophysics involving measurement of cosmic rays, gamma...

  6. antarctica ca 480ka: Topics by E-print Network

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

    Astronomy conducted includes optical, IR, THz & sub-mm, measurements of the CMBR, solar, as well as high energy astrophysics involving measurement of cosmic rays, gamma rays...

  7. antarctica resultados preliminares: Topics by E-print Network

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

    opens with a typical transmission... Tremblin, P; Schneider, N; Durand, G Al; Ashley, M C B; Lawrence, J S; Luong-Van, D M; Storey, J W V; Durand, G An; Reinert, Y; Veyssiere, C;...

  8. antarctica bacterium pseudoalteromonas: Topics by E-print Network

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

    opens with a typical transmission... Tremblin, P; Schneider, N; Durand, G Al; Ashley, M C B; Lawrence, J S; Luong-Van, D M; Storey, J W V; Durand, G An; Reinert, Y; Veyssiere, C;...

  9. antarctica trebouxiophyceae chlorophyta: Topics by E-print Network

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

    opens with a typical transmission... Tremblin, P; Schneider, N; Durand, G Al; Ashley, M C B; Lawrence, J S; Luong-Van, D M; Storey, J W V; Durand, G An; Reinert, Y; Veyssiere, C;...

  10. ACCUMULATION RATE MEASUREMENTS AT TAYLOR DOME, EAST ANTARCTICA

    E-Print Network [OSTI]

    Marshall, Hans-Peter

    .Weshowthatrobustmassbalancemeas- urementsinthisenvironmentmustrelyonspatialand/ortemporal averaging. Introduction The existence of glaciers, ice caps, and ice sheets depends-term potential to affect sea level through changing ice volume. Except in some coastal areas, it is a polar of these ice bodies present distinct challenges for measur- ing the various components of mass balance. The

  11. A solar photovoltaic power system for use in Antarctica

    SciTech Connect (OSTI)

    Kohout, L.L.; Merolla, A.; Colozza, A.

    1993-12-01T23:59:59.000Z

    A solar photovoltaic power system was designed and built at the NASA Lewis Research Center as part of the NASA/NSF Antarctic Space Analog Program. The system was installed at a remote field camp at Lake Hoare in the Dry Valleys, and provided a six-person field team with electrical power for personal computers and printers, lab equipment, lighting, and a small microwave oven. The system consists of three silicon photovoltaic sub-arrays delivering a total of 1.5 kWe peak power, three lead-acid gel battery modules supplying 2.4 kWh, and an electrical distribution system which delivers 120 Vac and 12 Vdc to the user. The system was modularized for ease of deployment and operation. Previously the camp has been powered by diesel generators, which have proven to be both noisy and polluting. The NSF, in an effort to reduce their dependence on diesel fuel from both an environmental and cost standpoint, is interested in the use of alternate forms of energy, such as solar power. Such a power system also will provide NASA with important data on system level deployment and operation in a remote location by a minimally trained crew, as well as validate initial integration concepts.

  12. National Science Foundation, Lake Hoare, Antarctica | 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 onYouTube YouTube Note: Since the.pdfBreaking ofOilNEW HAMPSHIRE BUILDSEnergy 1DepartmentAugustNational Science

  13. Discrepancies in Shortwave Diffuse Measured and Modeled Irradiances in Antarctica

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power AdministrationField Campaign:INEA : Papers Subfolders inDiscovery of

  14. "Angola Is Not Just about Oil, War and Poverty": Reflections on Angolan Soccer, Nationalism and the Run to the 2006 World Cup Finals

    E-Print Network [OSTI]

    Cleveland, Todd

    2007-01-01T23:59:59.000Z

    only for its prodigious oil reserves, protracted civil war (for its prodigious oil reserves, protracted civil war (1975-

  15. Margaret Kowalski Economics and Chinese Studies

    E-Print Network [OSTI]

    Andrews, Peter B.

    of Chinese "Checkbook Diplomacy" on Oil Production in Angola, Nigeria, and Sudan China's economic boom and incredible increase in energy consumption have recently the market in Angola, Nigeria, and Sudan. Many Western companies are concerned

  16. Institutionalizing Unsustainability: The Paradox of Global Climate Governance

    E-Print Network [OSTI]

    Stevenson, Hayley

    2013-01-01T23:59:59.000Z

    energy sup- plies and developing relations with numerous fossil fuel exporting coun- tries, including Venezuela, Nigeria, Sudan, Angola, Syria, Egypt,

  17. 2009-2010 RISO's The Accounting Club

    E-Print Network [OSTI]

    Wiegner, Tracy N.

    Angola Study Group Hilo Colony of the Phi Delta Chi Pharmacy Fraternity Hilo Ultimate Frisbee Org. (UFO

  18. Contribution of ocean, fossil fuel, land biosphere, and biomass burning carbon fluxes to seasonal and interannual variability in atmospheric CO 2

    E-Print Network [OSTI]

    2008-01-01T23:59:59.000Z

    Storhofdi Iceland Canary Islands Jubany Antarctica KeyGuam Halley Bay Antarctica Canary Islands Key Biscayne FL

  19. Evolution and Relationships of the Conifer Seed Cone Telemachus: Evidence from the Triassic of Antarctica

    E-Print Network [OSTI]

    Escapa, Ignacio H.; Decombeix, Anne-Laure; Taylor, Edith L.; Taylor, Thomas N.

    2010-06-01T23:59:59.000Z

    employed to observe external char- acters of the cones. Using this technique, we embedded the specimens in Bio-Plastic, and the shale was chemically mac- erated using 48% hydrofluoric acid until the rock was digested (Escapa et al. 2010). Cuticles...

  20. antarctica 137cs 40k: Topics by E-print Network

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

    Research, Rudjer Bo and honey, samples of which were collected from the Republic of Croatia 4 years after the Chernobyl accidentkg. cesium radioactivity flower pollen ...

  1. Isotopic measurements of solar noble gases in individual micrometeorites from Greenland and Antarctica

    SciTech Connect (OSTI)

    Olinger, C.T.

    1990-01-01T23:59:59.000Z

    Noble gases are studied in individual 100 micron-size particles selected from Greenland and Antarctic glacial sediments. Noble gas isotopic and elemental patterns confirm the extraterrestrial origin of 81 out of 302 particles studied. Micrometeorites in this size range are particularly interesting because they correspond to the peak of the meteoritic mass flux distribution. Many particles studied are compositionally and morphologically similar to known meteoritic materials.

  2. Seismic and acoustic observations at Mount Erebus Volcano, Ross Island, Antarctica, 19941998

    E-Print Network [OSTI]

    Rowe, Charlotte

    the lava lake surface; however, this depth could be exaggerated by near-field radial tilt. Seismic and Kienle, 1986; Kaminuma, 1994). Additional remote monitoring included infrasonic microphones (Dibble et al., 1984; Kaminuma et al., 1985) and, from 1986 to 1990, television surveillance of the lava lake (Dibble

  3. Incorporation of particulates into accreted ice above subglacial Lake Vostok, Antarctica G. Royston-Bishop1

    E-Print Network [OSTI]

    Priscu, John C.

    core depths were filtered through 0.2 µm polycarbonate membranes and secondary electron images were dramatic changes in the D and 18 O signatures, gas content, crystal size and electrical conductivity

  4. Incorporation of particulates into accreted ice above subglacial Vostok lake, Antarctica

    E-Print Network [OSTI]

    Christner, Brent C.

    polycarbonate membranes, and secondary electron images were collected at Â500 magnification using a scanning conductivity suggest that the ice comprises lake water which has refrozen to the underside of the ice sheet

  5. Decadal-scale variations in ice flow along Whillans Ice Stream and its tributaries, West Antarctica

    E-Print Network [OSTI]

    Stearns, Leigh; Jezek, K.A.; Van der Veen, C.J.

    2005-01-01T23:59:59.000Z

    We investigate velocity changes occurring along Whillans Ice Stream (WIS) by comparing velocities derived from repeat aerial photographs acquired in 1985–89 (average date of 1987) to interferometric satellite radar (InSAR) velocities collected...

  6. Bedmap2: improved ice bed, surface and thickness datasets for Antarctica

    E-Print Network [OSTI]

    2013-01-01T23:59:59.000Z

    Subglacial topography inferred from ice surface ter- rainSubglacial topography inferred from ice surface ter- rainsurface eleva- tion, ice thickness and subglacial topography

  7. Biological characteristics of Uphausia superba dan in acoustically detected aggregations near Elephant Island, Antarctica

    E-Print Network [OSTI]

    Yeager, Marilyn Smith

    1994-01-01T23:59:59.000Z

    . , 1986), mating behavior (NAITo et al. , 1986) and molting stage (BucHHoLz, 1985). However, RIcKETTs et. al. (1992) argued that krill did not seem to form groups based solely on biological similarity (length, maturity, gender), but noted that krill...

  8. Tide-induced microseismicity in the Mertz glacier grounding area, East Antarctica

    E-Print Network [OSTI]

    Bascou, Jérôme

    LiTA (Architecture de la Lithosphère de Terre Adélie) project comprises four broadband three-component seismic]. [4] The sinuous geometry of the Mertz grounding line, defined by double-difference interferometric with the bedrock topography, together with the tide-induced ver- tical and lateral displacement resulting in along

  9. Use of uranium^thorium dating to determine C reservoir eects in lakes: examples from Antarctica

    E-Print Network [OSTI]

    Henderson, Gideon

    Use of uranium^thorium dating to determine past 14 C reservoir e¡ects in lakes: examples from of dissolved `dead' carbon or to slow air^water exchange. Here we use the TIMS uranium^thorium disequilibrium

  10. Palaeofibulus Gen. nov., a Clamp-Bearing Fungus from the Triassic of Antarctica

    E-Print Network [OSTI]

    Osborn, Jeffrey M.; Taylor, Thomas N.; White, James F. Jr.

    1989-07-01T23:59:59.000Z

    10764 Triadelphia was erected by Shearer and Crane (1971) to accommodate a single species, T. het-erospora, a saprophyte on balsa wood blocks sub-merged in the Patuxent River, Maryland. Tria-delphia heterospora characteristically produces two different...

  11. Palaeofibulus gen. nov., a clamp-bearing fungus from the Triassic of Antarctica

    E-Print Network [OSTI]

    Osborn, Jeffrey M.; Taylor, Thomas N.; White, James F. Jr.

    1989-01-05T23:59:59.000Z

    10764 Triadelphia was erected by Shearer and Crane (1971) to accommodate a single species, T. het-erospora, a saprophyte on balsa wood blocks sub-merged in the Patuxent River, Maryland. Tria-delphia heterospora characteristically produces two different...

  12. Transoceanic wave propagation links iceberg calving margins of Antarctica with storms in tropics and Northern Hemisphere

    E-Print Network [OSTI]

    Boyce, C. Kevin

    could not verify this due to shut- down of their power supply (solar panels). [4] A close examination during the season of winter darkness, due to reliance on photovoltaic power). A spectrogram constructed

  13. antarctica x-band minisar: Topics by E-print Network

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

    where the dynamics of a flat Universe are dominated by forces exerted by the Dark Energy and Dark Matter. The South Pole Telescope (SPT) is a newly-operational 10 m diameter...

  14. Tide Model Accuracy in the Amundsen Sea, Antarctica, from InSAR Observations of Ice

    E-Print Network [OSTI]

    draining this region are out of balance; satellite records have documented glacier thinning, acceleration is currently losing ice mass at a rate comparable to that of the entire Greenland Ice Sheet. · Glaciers the flow of ice is removed using a prediction derived from tracking features in SAR backscatter intensity

  15. Correlation of Cycles in Lava Lake Motion and Degassing at Erebus Volcano, Antarctica

    E-Print Network [OSTI]

    Peters, Nial; Oppenheimer, Clive; Killingsworth, Drea Rae; Frechette, Jed; Kyle, Philip

    2014-08-19T23:59:59.000Z

    the figure for clarity.314 5. Discussion Given the apparent complexity of Erebus’s shallow magmatic system [e.g. Zandomeneghi315 et al., 2013] and the sensitivity of multi-phase flows to small changes in system parameters316 [e.g. Molina et al., 2012... :24 on 17 December 2012) have been omitted from the figure for clarity. 5. Discussion Given the apparent complexity of Erebus’s shallow magmatic system [e.g., Zandomeneghi et al., 2013] and the sensitivity of multiphase flows to small changes in system...

  16. Little Ice Age cold interval in West Antarctica: Evidence from borehole temperature at the West Antarctic

    E-Print Network [OSTI]

    Severinghaus, Jeffrey P.

    future climate changes. The LIA cooling was associated with a time of lower solar irradiance.1. The Last 1000 Years [2] The Northern Hemisphere experienced a widespread cooling from about 1400 to 1850 C of event is key to our knowledge of the variability in the climate system, and to our ability to forecast

  17. Provenance and glacial history of very fine quartz sand from the Weddell Sea, Antarctica

    E-Print Network [OSTI]

    Smith, Caryn Hallett

    1988-01-01T23:59:59.000Z

    in which they grew as well as the processes to which they have been exposed, either concurrent with or subsequent to their liberation from the parent rock (Moss, 1966; Mazzullo and Magenheimer, 1987). Accordingly quartz grains from a diversity of source.... Alternatively, Leg 113 drilling results suggest the origin of these central basin sediments are from West Antarctic sources, based on lithic grains thought to have been derived fran the Jurassic and Cretaceous sedimentary rocks of the southern Antarctic...

  18. IceCube-Gen2: A Vision for the Future of Neutrino Astronomy in Antarctica

    E-Print Network [OSTI]

    IceCube-Gen2 Collaboration; :; M. G. Aartsen; M. Ackermann; J. Adams; J. A. Aguilar; M. Ahlers; M. Ahrens; D. Altmann; T. Anderson; G. Anton; C. Arguelles; T. C. Arlen; J. Auffenberg; S. Axani; X. Bai; I. Bartos; S. W. Barwick; V. Baum; R. Bay; J. J. Beatty; J. Becker Tjus; K. -H. Becker; S. BenZvi; P. Berghaus; D. Berley; E. Bernardini; A. Bernhard; D. Z. Besson; G. Binder; D. Bindig; M. Bissok; E. Blaufuss; J. Blumenthal; D. J. Boersma; C. Bohm; F. Bos; D. Bose; S. Böser; O. Botner; L. Brayeur; H. -P. Bretz; A. M. Brown; N. Buzinsky; J. Casey; M. Casier; E. Cheung; D. Chirkin; A. Christov; B. Christy; K. Clark; L. Classen; F. Clevermann; S. Coenders; G. H. Collin; J. M. Conrad; D. F. Cowen; A. H. Cruz Silva; J. Daughhetee; J. C. Davis; M. Day; J. P. A. M. de André; C. De Clercq; S. De Ridder; P. Desiati; K. D. de Vries; M. de With; T. DeYoung; J. C. Dí andaz-Vélez; M. Dunkman; R. Eagan; B. Eberhardt; T. Ehrhardt; B. Eichmann; J. Eisch; S. Euler; J. J. Evans; P. A. Evenson; O. Fadiran; A. R. Fazely; A. Fedynitch; J. Feintzeig; J. Felde; K. Filimonov; C. Finley; T. Fischer-Wasels; S. Flis; K. Frantzen; T. Fuchs; T. K. Gaisser; R. Gaior; J. Gallagher; L. Gerhardt; D. Gier; L. Gladstone; T. Glüsenkamp; A. Goldschmidt; G. Golup; J. G. Gonzalez; J. A. Goodman; D. Góra; D. Grant; P. Gretskov; J. C. Groh; A. Groß; C. Ha; C. Haack; A. Haj Ismail; P. Hallen; A. Hallgren; F. Halzen; K. Hanson; J. Haugen; D. Hebecker; D. Heereman; D. Heinen; K. Helbing; R. Hellauer; D. Hellwig; S. Hickford; J. Hignight; G. C. Hill; K. D. Hoffman; R. Hoffmann; A. Homeier; K. Hoshina; F. Huang; W. Huelsnitz; P. O. Hulth; K. Hultqvist; A. Ishihara; E. Jacobi; J. Jacobsen; G. S. Japaridze; K. Jero; O. Jlelati; B. J. P. Jones; M. Jurkovic; O. Kalekin; A. Kappes; T. Karg; A. Karle; T. Katori; U. F. Katz; M. Kauer; A. Keivani; J. L. Kelley; A. Kheirandish; J. Kiryluk; J. Kläs; S. R. Klein; J. -H. Köhne; G. Kohnen; H. Kolanoski; A. Koob; L. Köpke; C. Kopper; S. Kopper; D. J. Koskinen; M. Kowalski; C. B. Krauss; A. Kriesten; K. Krings; G. Kroll; M. Kroll; J. Kunnen; N. Kurahashi; T. Kuwabara; M. Labare; J. L. Lanfranchi; D. T. Larsen; M. J. Larson; M. Lesiak-Bzdak; M. Leuermann; J. LoSecco; J. Lünemann; J. Madsen; G. Maggi; K. B. M. Mahn; S. Marka; Z. Marka; R. Maruyama; K. Mase; H. S. Matis; R. Maunu; F. McNally; K. Meagher; M. Medici; A. Meli; T. Meures; S. Miarecki; E. Middell; E. Middlemas; N. Milke; J. Miller; L. Mohrmann; T. Montaruli; R. W. Moore; R. Morse; R. Nahnhauer; U. Naumann; H. Niederhausen; S. C. Nowicki; D. R. Nygren; A. Obertacke; S. Odrowski; A. Olivas; A. Omairat; A. O'Murchadha; T. Palczewski; L. Paul; Ö. Penek; J. A. Pepper; C. Pérez de los Heros; C. Pfendner; D. Pieloth; E. Pinat; J. L. Pinfold; J. Posselt; P. B. Price; G. T. Przybylski; J. Pütz; M. Quinnan; L. Rädel; M. Rameez; K. Rawlins; P. Redl; I. Rees; R. Reimann; M. Relich; E. Resconi; W. Rhode; M. Richman; B. Riedel; S. Robertson; J. P. Rodrigues; M. Rongen; C. Rott; T. Ruhe; B. Ruzybayev; D. Ryckbosch; S. M. Saba; H. -G. Sander; J. Sandroos; P. Sandstrom; M. Santander; S. Sarkar; K. Schatto; F. Scheriau; T. Schmidt; M. Schmitz; S. Schoenen; S. Schöneberg; A. Schönwald; A. Schukraft; L. Schulte; O. Schulz; D. Seckel; Y. Sestayo; S. Seunarine; M. H. Shaevitz; R. Shanidze; M. W. E. Smith; D. Soldin; S. Söldner-Rembold; G. M. Spiczak; C. Spiering; M. Stamatikos; T. Stanev; N. A. Stanisha; A. Stasik; T. Stezelberger; R. G. Stokstad; A. Stöß andl; E. A. Strahler; R. Ström; N. L. Strotjohann; G. W. Sullivan; H. Taavola; I. Taboada; A. Taketa; A. Tamburro; H. K. M. Tanaka; A. Tepe; S. Ter-Antonyan; A. Terliuk; G. Teš; andi?; S. Tilav; P. A. Toale; M. N. Tobin; D. Tosi; M. Tselengidou; E. Unger; M. Usner; S. Vallecorsa; N. van Eijndhoven; J. Vandenbroucke; J. van Santen; S. Vanheule; M. Vehring; M. Voge; M. Vraeghe; C. Walck; M. Wallraff; Ch. Weaver; M. Wellons; C. Wendt; S. Westerhoff; B. J. Whelan; N. Whitehorn; C. Wichary; K. Wiebe; C. H. Wiebusch; D. R. Williams; H. Wissing; M. Wolf; T. R. Wood; K. Woschnagg; S. Wren; D. L. Xu; X. W. Xu; Y. Xu; J. P. Yanez; G. Yodh; S. Yoshida; P. Zarzhitsky; J. Ziemann; M. Zoll

    2014-12-18T23:59:59.000Z

    The recent observation by the IceCube neutrino observatory of an astrophysical flux of neutrinos represents the "first light" in the nascent field of neutrino astronomy. The observed diffuse neutrino flux seems to suggest a much larger level of hadronic activity in the non-thermal universe than previously thought and suggests a rich discovery potential for a larger neutrino observatory. This document presents a vision for an substantial expansion of the current IceCube detector, IceCube-Gen2, including the aim of instrumenting a $10\\,\\mathrm{km}^3$ volume of clear glacial ice at the South Pole to deliver substantial increases in the astrophysical neutrino sample for all flavors. A detector of this size would have a rich physics program with the goal to resolve the sources of these astrophysical neutrinos, discover GZK neutrinos, and be a leading observatory in future multi-messenger astronomy programs.

  19. Supraglacial lakes on the Larsen B Ice Shelf, Antarctica, and Paakitsoq Region, Greenland: a comparative study

    E-Print Network [OSTI]

    Banwell, Alison F.; Caballero, Martamaria; Arnold, Neil S.; Glasser, Neil F.; Cathles, L. Mac; MacAyeal, Douglas R.

    2014-05-01T23:59:59.000Z

    .epsl.2011.04.014. 427 Box, J. E., and K. Ski (2007), Remote sounding of Greenland supraglacial melt lakes: 428 implications for subglacial hydraulics, J. Glaciol., 53(181), 257–265, 429 doi:10.3189/172756507782202883. 430 Bromwich, D. H., J. P. Nicolas... , Geophys. Res. Lett., 39(16), L16504, 510 doi:10.1029/2012GL052413. 511 Mobley, C. D. (1994), Light and water: radiative transfer in natural waters. 512 Academic Press, San Diego, 592. 513 Phillips, H. A. (1998), Surface meltstreams on the Amery Ice...

  20. Recent cytheracean ostracodes from McMurdo Sound and the Ross Sea, Antarctica

    E-Print Network [OSTI]

    Benson, R. H.

    1964-11-16T23:59:59.000Z

    , shells, and carapaces was excellent, allowing many features of the ostracodes to be studied that are not visible in many fossil forms. There was little evidence of agitation of the waters overlying the bot- tom. The spicules and bryozoan pieces exhibited... diaphragm held on by a friction cap. The diaphragm consisted of a standard machine washer oxidized with a blow torch. The specimens were stained with silver nitrate, heated to oxidize the silver, immersed in glycerol, and lighted with three standard...

  1. Soil Biology & Biochemistry 38 (2006) 30193034 Terrestrial ecosystem processes of Victoria Land, Antarctica

    E-Print Network [OSTI]

    Wall, Diana

    2006-01-01T23:59:59.000Z

    and Environmental Sciences, University of Stirling, Stirling FK9 4LA, Scotland, UK c Landcare Research, Private Bag diversity and biomass of organisms contributing to ecosystem processes (Campbell and Claridge, 1987; Freck

  2. Aspects of mechanical design for an infrared robotic telescope in Antarctica: IRAIT

    E-Print Network [OSTI]

    Igor Di VArano

    2006-09-22T23:59:59.000Z

    The purpose of this thesis is to focus attention on the mechanical aspects in designing an infrared telescope, IRAIT (International Robotic Antarctic Infrared Telescope), with aperture size of 80 cm, f#=21, entirely robotic and remote controlled, which must operate at Dome C, on Antarctic Plateau, starting on Summer 2007. Before illustrating in detail the choice criteria of different mechanical components, in order to satisfy stress requirements and structural verification, and the final design solutions we have adopted,firstly a few tissues must be considered. They mainly concern the preference for Dome C as probably the best observing site in the world, the scientific targets, instruments and tools necessary to reach such goals. The mechanical structure of telescope has been analyzed, and results retrieved by the static and dynamic analysis through a finite element software are illustrated. They concern the behavior of single parts, subassemblies and overall structure to active loads applied. It is shown that, as a matter of fact, thermal stress can be reckoned as the most influent of all static loads. A dynamic analysis of some critical subassemblies was used,in order to determine the frequency response of the system aiming at its best insulation from vibrations.

  3. 100 Years of Humans in Antarctica1 by Lily Whiteman, National Science Foundation2

    E-Print Network [OSTI]

    South Bohemia, University of

    that is currently being used to study the nature of14 mysterious dark matter. Below the surface of the ice sheet warming of water temperatures may be31 influencing the proliferation of undersea giants, including

  4. antarctica reveals non-organic: Topics by E-print Network

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

    opens with a typical transmission... Tremblin, P; Schneider, N; Durand, G Al; Ashley, M C B; Lawrence, J S; Luong-Van, D M; Storey, J W V; Durand, G An; Reinert, Y; Veyssiere, C;...

  5. Bedmap2: improved ice bed, surface and thickness datasets for Antarctica

    E-Print Network [OSTI]

    2013-01-01T23:59:59.000Z

    of the Potential Sea-Level Rise from a Col- lapse of theof floating ice and sea level rise, Geophys. Res. Lett. ,contribution to sea-level rise (58 m) are simi- lar to those

  6. Monitoring Isostatic Rebound in Antarctica with the Use of Continuous Remote GPS Observations

    E-Print Network [OSTI]

    Tregoning, Paul

    such application is the monitoring of (postgla- cial) isostatic rebound. When large ice caps melt, the lithosphere varies depend- ing on the shape of the ice cap and both the amount and timing of the melting that has on the Lambert Giacier and surrounding piateau. distinguish between different models of ice melting

  7. An unexpected journey: experimental insights into magma and volatile transport beneath Erebus volcano, Antarctica

    E-Print Network [OSTI]

    Iacovino, Kayla

    2014-06-10T23:59:59.000Z

    fugacity of the volatile component and the concentration of that volatile dissolved in the melt. Because of the poor fit of our CO2 data to a power law regression, the pure-CO2 experiments of Lesne et al. (2011b) were used to create these isobars... /mantle boundary. Seismic and gravitational investigations on and around Ross Island suggest that this boundary is ?20 km deep (Cooper et al., 1994; Finotello et al., 2011; Newhall & Dzurisin, 1989). The evolution of the Erebus cone itself is inferred to have taken...

  8. MONITORING STRATIFICATION AND CURRENTS AT THE CONTINENTAL SLOPE OF THE SCOTIA SEA, ANTARCTICA

    E-Print Network [OSTI]

    Thornton, Melanie 1989-

    2011-05-02T23:59:59.000Z

    over tidal to seasonal time scales. 11 Figure 5. Vertical Sections for Hydrographic Stations near 53?W. Vertical sections of potential temperature (?C), salinity and neutral density (kg m-3) for 2009 ACROSS hydrographic stations near 53... with the ?-S scatter from moored instruments and nearby CTD hydrographic stations from the ACROSS (2009) and ESASSI (2008) cruises. Tidal components were removed from the half-hourly raw current data by applying a 40- hour low pass filter. Then inferences...

  9. Screening fungi isolated from historic Discovery Hut on Ross Island, Antarctica for cellulose degradation

    E-Print Network [OSTI]

    Blanchette, Robert A.

    and supplies were abandoned. The hut was also used extensively by four other expeditions in the Heroic Age the south. After use by Shackleton's 1914­1917 Imperial Trans-Antarctic expedition, the hut was abandoned ships and scientists from the nearby research facilities, Scott Base and McMurdo Station. Of the three

  10. untitled

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

    Emirates. b Includes Algeria, Angola (January 2007-present), Ecuador (1983-1992), Indonesia, Iran, Iraq, Kuwait, Libya, Nigeria, Qatar, Saudi Arabia, United Arab Emirates and...

  11. --No Title--

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

    Emirates. 2 Includes Algeria, Angola (January 2007-present), Ecuador (1983-1992), Indonesia, Iran, Iraq, Kuwait, Libya, Nigeria, Qatar, Saudi Arabia, United Arab Emirates and...

  12. untitled

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

    Emirates. c Includes Algeria, Angola (January 2007-present), Ecuador (1983-1992), Indonesia, Iran, Iraq, Kuwait, Libya, Nigeria, Qatar, Saudi Arabia, United Arab Emirates and...

  13. Countries - U.S. Energy Information Administration (EIA)

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

    Angola Australia Azerbaijan Brazil Canada China Colombia Congo (Brazzaville) Ecuador Egypt India Indonesia Iran Iraq Japan Kazakhstan Korea, South Kuwait Libya Malaysia Mexico...

  14. U.S. Energy Information Administration (EIA)

    Gasoline and Diesel Fuel Update (EIA)

    Angola Australia Azerbaijan Brazil Canada China Colombia Congo (Brazzaville) Ecuador Egypt India Indonesia Iran Iraq Japan Kazakhstan Korea, South Kuwait Libya Malaysia Mexico...

  15. SOBRE VIRTUAL -Estudios de grado Ingeniera Civil

    E-Print Network [OSTI]

    Escolano, Francisco

    Administración y dirección de empresas Arquitectura Arquitectura Técnica (antigua Ingeniería de la Edificación

  16. 90E 120 150E 180 150W 120 90 60 30W 0 30E 60 DSDP Legs 196 ( ), ODP Legs 100210 ( ), IODP Expeditions 301352 ( )

    E-Print Network [OSTI]

    GREENLAND EUROPE AFRICA SOUTH AMERICA NORTH AMERICA ASIA AUSTRALIA ANTARCTICA INDIAN OCEAN PACIFIC ASIA AUSTRALIA ANTARCTICA INDIAN OCEAN PACIFIC OCEAN ATLANTIC OCEAN ARCTIC OCEAN SOUTHERN OCEAN AMERICA NORTH AMERICA ASIA AUSTRALIA ANTARCTICA INDIAN OCEAN PACIFIC OCEAN ATLANTIC OCEAN ARCTIC OCEAN

  17. Profiling Float Observations of the Upper Ocean Under Sea Ice off the Wilkes Land Coast of Antarctica

    E-Print Network [OSTI]

    Riser, Stephen C.

    the water column is weakly stratified due to brine rejection and is therefore only marginally stable brine rejection associated with sea ice formation results in dense shelf waters, which mix, the salt in seawater is excluded. The expelled salt remains as pockets of brine in the ice until it slowly

  18. Russian Scientists Breach Antarctica's Lake Vostok--Confirmed1 by Christine Dell'Amore for National Geographic News2

    E-Print Network [OSTI]

    South Bohemia, University of

    evidence that21 microbes could live in the subglacial lake, deriving energy from minerals by "eating rocks the ancient lake, the28 team started taking careful steps to ensure the project won't contaminate the lake the ice samples35 could contaminate them, since the Russian team isn't using clean technology in the upper

  19. Lidar observations of polar mesospheric clouds at Rothera, Antarctica (67.5S, 68.0W)

    E-Print Network [OSTI]

    Chu, Xinzhao

    Chu,1 Graeme J. Nott,2 Patrick J. Espy,2 Chester S. Gardner,1 Jan C. Diettrich,2 Mark A. Clilverd,2 and Martin J. Jarvis2 Received 15 September 2003; revised 15 October 2003; accepted 30 October 2003. Diettrich, M. A. Clilverd, and M. J. Jarvis (2004), Lidar observations of polar mesospheric clouds

  20. Reproductive strategies of Weddell seals in McMurdo Sound, Antarctica: relationship among vocalizations, behaviors, and social interactions

    E-Print Network [OSTI]

    Rousseau, Ludivine Blandine

    2007-09-17T23:59:59.000Z

    and the most frequently observed free-ranging female Yellow 1….. 27 6 Tree diagram for pattern 1: Pink emits a growl as a female leaves or swims away from the breathing hole ……………………. 36 7 Tree diagram for pattern 2: Pink emits a mew when Yellow 1..., and transported into the research hut. Video cameras and recorders of dive depth, swim speed, heart-rate and tail strokes were mounted on the head and back of these free- ranging seals. After an 18-hour recovery period, seals were released into the artificial...

  1. The History of Astrophysics in Antarctica Ahn, H. S., et al. 2002, Advanced Thin Ionization Calorimeter (ATIC) Update, American Physical

    E-Print Network [OSTI]

    Burton, Michael

    . A., Schinckel, A. E. T., & Storey, J. W. V. 1998, Antarctic Fiber Optic Spectrometer, PASP, 110, 306., et al. 2001, Observation of high-energy neutrinos using Cerenkov detectors embedded deep in Antarctic Observations of the Easter 2001 Solar Particle Event, ApJ, 610, L103 Boccas, M., Ashley, M. C. B., Phillips, M

  2. Comments on the Regional Climate Variability Driven by Foehn Winds in the McMurdo Dry Valleys, Antarctica

    E-Print Network [OSTI]

    Sienicki, Krzysztof

    2013-01-01T23:59:59.000Z

    The main objection to Speirs, McGowan, Steinhoff and Bromwich work arises from the lack of analyses of the probability distribution functions of underlying processes leading to wind formation of which velocities are measured by automated weather stations and reported in the paper. Mathematically a rigorous definition of calculating the correlation coefficient (Pearson product-moment correlation coefficient) of averages does not exist. Therefore the authors numbers as given in Table II represent a set of randomly calculated figures. The authors suggestion in relation to a few of these random numbers that some of them have statistical significance at the 95% level is erroneous since no relationship exists between correlation coefficient of averages and statistical significance. Therefore Speirs et al. main conclusion that the - SAM is found to significantly influence foehn wind frequency at McMurdo Dry Valleys is unfounded.

  3. Inter-annual sea-ice dynamics and micro-algal biomass in winter pack ice of Marguerite Bay, Antarctica

    E-Print Network [OSTI]

    Stewart, Frank

    in this region (Stammerjohn et al., 2003; Stammerjohn and Smith, 1996). Changes in mesoscale ice dynamics

  4. Soil Biology & Biochemistry 38 (2006) 30653082 Soil carbon turnover in the McMurdo Dry Valleys, Antarctica

    E-Print Network [OSTI]

    Wall, Diana

    2006-01-01T23:59:59.000Z

    Soil Biology & Biochemistry 38 (2006) 3065­3082 Soil carbon turnover in the McMurdo Dry Valleys Valleys are among the most inhospitable soil environments on Earth due to climate and substrate because likely sources of organic matter are 102 ­104 yrs old and in situ soil respiration is typically

  5. Airborne UHF Radar for Fine Resolution Mapping of Near Surface Accumulation Layers in Greenland and West Antarctica

    E-Print Network [OSTI]

    Lewis, Cameron Scott

    2010-11-01T23:59:59.000Z

    ). .................................................................................................................................................................................. 98 FIGURE 83. SCREENSHOT OF ADS LINECALC SOLUTION FOR 40 MIL WIDTH MICROSTRIP. .............................................................. 105 FIGURE 84. TRACE OVER-ETCH CROSS-SECTION [36...

  6. A 12,000 year record of explosive volcanism in the Siple Dome Ice Core, West Antarctica

    E-Print Network [OSTI]

    Dunbar, Nelia W.

    of tephra found in the SDMA core: Balenny Island, Pleiades, Mount Berlin, Mount Takahe, and Mount Melbourne]. Continuous long-term records of SO4 2À concentrations [Mayewski et al., 1986, 1997; Legrand et al., 1988 acidity records from electrical conductivity (ECM) [Hammer et al., 1980; Hammer, 1983; Taylor et al., 1993

  7. Changes in black carbon deposition to Antarctica from two ice core records, A.D. 1850-2000

    E-Print Network [OSTI]

    Meskhidze, Nicholas

    Climate and Environment CRC, University of Tasmania, Hobart, TAS, Australia, [5] Australian Nuclear. (2007). In the cold room, previously cut one meter ice core sticks of 3x3cm, are melted continuously on a heated melter head specifically designed to eliminate contamination from the atmosphere

  8. High resistance to oxidative damage in the Antarctic midge Belgica antarctica, and developmentally linked expression of genes encoding superoxide

    E-Print Network [OSTI]

    Lee Jr., Richard E.

    antioxidant enzymes, superoxide dismutase (SOD) and catalase (Cat), and showed that SOD mRNA was expressed upregulated in response to sunlight. Total antioxidant capacity of the adults was higher than and fragmentation of the peptide chain to total enzyme inactivation by superoxide anions (Stadtman, 1986). ROS can

  9. Geochemistry of back arc basin volcanism in Bransfield Strait, Antarctica: Subducted contributions and along-axis variations

    E-Print Network [OSTI]

    Kurapov, Alexander

    /chemistry; 3640 Mineralogy and Petrology: Igneous petrology; 3655 Mineralogy and Petrology: Major element composition; 3670 Mineralogy and Petrology: Minor and trace element composition; KEYWORDS: back arc basin

  10. Long-term experimental warming reduces soil nematode populations in the McMurdo Dry Valleys, Antarctica

    E-Print Network [OSTI]

    Wall, Diana

    warming is expected to increase snow and glacial melt, resulting in higher stream discharge, rising lake levels, and an increase in areas of moist soil, but the potential influence of warming and associated changes in hydrology on the soil ecosystem is poorly understood. To examine the effects of soil warming

  11. Microbial Diversity Studies in Sediments of Perennially Ice-covered Lakes, McMurdo Dry Valleys, Antarctica

    E-Print Network [OSTI]

    Tang, Chao

    2009-01-01T23:59:59.000Z

    Hypersaline Lakes of the Wadi An Natrun, Egypt. MicrobialDimitriu et al. , 2008) and the Wadi An Natrun Lakes (Mesbah

  12. Microbial Diversity Studies in Sediments of Perennially Ice-covered Lakes, McMurdo Dry Valleys, Antarctica

    E-Print Network [OSTI]

    Tang, Chao

    2009-01-01T23:59:59.000Z

    perennial ice cover. Sedimentology 38: 363-379. Takacs,perennial ice cover. Sedimentology 38: 363-379. Suzuki, M. ,perennial ice cover. Sedimentology 38: 363-379. Tamaki, H. ,

  13. Marine air intrusion into the Adelie Land sector of East Antarctica: A study using the regional climate model (MAR)

    E-Print Network [OSTI]

    Gallée, Hubert

    , and often, precipitation in the coastal regions. Extratropical cyclones also advect cloud cover ahead of them as they track eastward. The presence of clouds greatly effects the reflected radiation of the atmosphere. In summer their main impact is to decrease the short wave radiation coming to Earth, while

  14. Power Plays & Capacity Constraints: The Selection of Defendants in WTO Disputes

    E-Print Network [OSTI]

    Guzman, Andrew T; Simmons, Beth A.

    2005-01-01T23:59:59.000Z

    US * Bangladesh is the only LDC to have participated in DSU1995-1997 and LI from 1998-2002. LDC S 68 Afghanistan AngolaZambia To qualify as an LDC a country must have a gross

  15. POWER PLAYS & CAPACITY CONSTRAINTS: THE SELECTION OF DEFENDANTS IN WTO DISPUTES

    E-Print Network [OSTI]

    Guzman, Andrew T; Simmons, Beth A

    2005-01-01T23:59:59.000Z

    US * Bangladesh is the only LDC to have participated in DSU1995-1997 and LI from 1998-2002. LDC S 68 Afghanistan AngolaZambia To qualify as an LDC a country must have a gross

  16. Energy Independence for North America - Transition to the Hydrogen...

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

    Non-OPEC*** 3,407 ***includes but not limited to Angola, Colombia, Russia, China, Norway and United Kingdom. 175.60 billion barrels U.S. PADD V 4.85 billion barrels U.S. PADD...

  17. TABLE40.CHP:Corel VENTURA

    Gasoline and Diesel Fuel Update (EIA)

    1,986 Angola ... 63,341 285 1,577 0 0 0 0 443 0 0 Argentina ... 13,047 1,355 0 1,842 1,634 0 272 820 0 0...

  18. TABLE36.CHP:Corel VENTURA

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

    7,565 5 117 Angola ... 5,371 0 0 0 0 0 0 383 0 0 Argentina ... 0 0 0 313 380 0 230 284 0 0 Bahamas...

  19. TABLE43.CHP:Corel VENTURA

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

    0 1,005 Angola ... 20,829 285 1,577 0 0 0 0 0 0 0 Argentina ... 1,065 1,151 0 260 0 0 42 0 0 0 Australia...

  20. TABLE35.CHP:Corel VENTURA

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

    9,379 5 217 Angola ... 11,020 0 80 0 0 0 0 383 0 0 Argentina ... 1,972 0 0 313 380 0 230 284 0 0 Australia...

  1. TABLE41.CHP:Corel VENTURA

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

    402 911 Angola ... 33,919 0 0 0 0 0 0 443 0 0 Argentina ... 0 204 0 1,582 1,634 0 230 820 0 0 Bahamas...

  2. TABLE23.CHP:Corel VENTURA

    Gasoline and Diesel Fuel Update (EIA)

    0 107 19 0 18 Angola ... 1,853 0 0 0 0 0 0 0 0 0 Canada ... 30,038 3,557 0 0 76 0 107 19 0 18 Colombia...

  3. Writing on Multiple Journeys

    E-Print Network [OSTI]

    Robbins, Sarah; Pullen, Ann Ellis

    2012-01-01T23:59:59.000Z

    Travel--Angola.  I. Pullen, Ann Ellis, 1943- II. Darling,America by Sarah Robbins and Ann Ellis Pullen (c) 2011 byAmerica by Sarah Robbins and Ann Ellis Pullen (c) 2011 by

  4. Draft January 13, (ver 12) Africas technology leap are we part of the development?

    E-Print Network [OSTI]

    . Examples are countries like South Africa, Kenya, Nigeria and Angola. A driving factor has been Brazilian, ABB, Head of Public Affairs - Sweden and Northern Europe Region "Sun-energy project Sub Saharan Africa

  5. International Human Rights Activism in the United States during the Cold War

    E-Print Network [OSTI]

    Ramirez, Zachary Steven

    2013-01-01T23:59:59.000Z

    would be a reemergence of Kurdistan during World War II,the genocides in Iraqi Kurdistan, the former Yugoslavia, orAfghanistan, Somaliland, Iraqi Kurdistan, and Angola all had

  6. Volunteer Day Notes from the Office

    E-Print Network [OSTI]

    Pilyugin, Sergei S.

    students, listed by the country you put down when you signed in: Angola Argentina Bolivia Brazil Burkina policy to be strict with both punctuality and attendance. Also, it has to do with culture. To Americans

  7. Volunteer Weekend The Next Trip

    E-Print Network [OSTI]

    Pilyugin, Sergei S.

    is a list of the many places of origin of our students: Angola Argentina Bolivia Brazil Burkina Faso Chile and Culture Q: Why are the teachers really strict with punctuality? A: First of all, the official ELI policy

  8. 172 Rodrfguez, F.C. y Corges, J.-C. 1 Arqueologa Espadal 26 (2006) 1 171-192 Introduccion

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    2006-01-01T23:59:59.000Z

    antiguas ccn- turiaciones (Ardio Gil y Gurt, 1994) C01DO de los vestigios dei habitat rural, que pretiere cruce en los extremos de un gran rio va a favorecer, por supuesto, el desarrollo de

  9. Conservation Biology, Pages 158167 Volume 17, No. 1, February 2003

    E-Print Network [OSTI]

    Jenkins, David G.

    efímeros remanentes de Illinois. También llevamos a cabo simulaciones celulares autómatas para examinar los existente de crustáceos. Las simulaciones indican que la conversión de la antigua pradera húmeda en

  10. The Climate of the McMurdo, Antarctica, Region as Represented by One Year of Forecasts from the Antarctic Mesoscale Prediction System*

    E-Print Network [OSTI]

    Howat, Ian M.

    System (AMPS) was implemented in October 2000. AMPS employs a limited-area model, the Polar fifth-generation and seasonal distributions of wind direction and speed, 2-m temperature, mean sea level pressure, precipitation influence on the near-surface winds. Time-mean vortices occur in the lee of Ross Island, perhaps a factor

  11. Mutations in the stereospecificity pocket and at the entrance of1 the active site of Candida antarctica lipase B enhancing enzyme2

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    enantioselectivity toward pentan-2-23 ol, in solid/gas reactor. Besides, the width and shape of the hydrophobic,10]. The fast-reacting enantiomer21 positions its medium-sized substituent in the stereospecificity pocket

  12. Dealing with a fast changing environment: the trophic ecology of the southern elephant seal (Mirounga leonina) and crabeater seal (Lobodon carcinophaga) in the western Antarctica Peninsula

    E-Print Network [OSTI]

    Huckstadt, Luis Alfredo

    2012-01-01T23:59:59.000Z

    species in the seasonal pack ice zone. The main goal of myassociated with the pack ice. This species is a specialistthe Southern food web in the pack ice zone, and therefore a

  13. Latest Neoproterozoic to Mid-Cambrian age for the main deformation phases of the Transantarctic Mountains: new stratigraphic and isotopic constraints from the Pensacola Mountains, Antarctica

    E-Print Network [OSTI]

    Rowell, A. J.; Van Schmus, W. R.; Storey, B. C.; Fetter, A. H.; Evans, K. R.

    2001-03-01T23:59:59.000Z

    and monitored by analysis of NBS SRM-983 radiogenic Pb. Uranium was loaded on the same filament with the Pb and analysed as UO 2 + ; uranium fractionation was monitored using NBS SRM U-500. Uncertainties in U/Pb ratios due to uncertainties in fractionation...

  14. Phosphorus Fractions in Soils of Taylor Valley, Antarctica S. W. Blecker, J. A. Ippolito,* J. E. Barrett, D. H. Wall, R. A. Virginia, and K. L. Norvell

    E-Print Network [OSTI]

    Wall, Diana

    , respectively. We utilized a sequential inorganic P extraction procedure, analyzing for a series of labile weathering of P-bearing minerals at the Fryxell site inferred from the greater P levels found in most

  15. Dealing with a fast changing environment: the trophic ecology of the southern elephant seal (Mirounga leonina) and crabeater seal (Lobodon carcinophaga) in the western Antarctica Peninsula

    E-Print Network [OSTI]

    Huckstadt, Luis Alfredo

    2012-01-01T23:59:59.000Z

    elephant seals from Patagonia. Marine Mammal Science 26:430-juvenile elephant seals from Patagonia. Mar Mamm Sci 26:430-

  16. The bipolar diatoms Thalassiosira antarctica Comber and Porosira glacialis: comparative ultrastructure and physiology of vegetative and resting stages of disjunct populations

    E-Print Network [OSTI]

    Doucette, Gregory John

    1982-01-01T23:59:59.000Z

    in method of reproduction, along with other arguments in support of a link between the centric and pennate diatoms (Hasle, 1973; Ross E Sims, 1973), have lead to a questioning of the validity of this division. Simonsen (1979), although acknowledging.... , Crawford, 1981; Syvertsen s Hasle, in preparation; von Stosch, 1980) . But in many instances the discovery of new structures (e. g. , Fryxeli, 1975b; Hasle, 1972; Ross I Sims, 1972) has revealed more natural phylogenetic relationships among the diatoms...

  17. Analysis of the Use of Wind Energy to Supplement the Power Needs at McMurdo Station and Amundsen-Scott South Pole Station, Antarctica

    SciTech Connect (OSTI)

    Baring-Gould, I.; Robichaud, R.; McLain, K.

    2005-05-01T23:59:59.000Z

    This report summarizes an analysis of the inclusion of wind-driven power generation technology into the existing diesel power plants at two U.S. Antarctic research stations, McMurdo and Amundsen-Scott South Pole Station. Staff at the U.S. Department of Energy's National Renewable Energy Laboratory (NREL) conducted the analysis. Raytheon Polar Services, which currently holds the private sector support contract for the two research stations, was a major contributor to this report. To conduct the analysis, available data were obtained on the wind resources, power plant conditions, load, and component cost. Whenever possible, we validated the information. We then used NREL's Hybrid2 power system modeling software to analyze the potential and cost of using wind turbine generators at the two aforementioned facilities. Unfortunately, the power systems and energy allocations at McMurdo and South Pole Station are being redeveloped, so it is not possible to validate future fuel use. This report is an initial assessment of the potential use of wind energy and should be followed by further, more detailed analysis if this option is to be considered further.

  18. Diatom species composition and abundance in water column assemblages from five drill sites in Prydz Bay, Antarctica, Ocean Drilling Program Leg 119: distributional patterns 

    E-Print Network [OSTI]

    Kang, Sung-Ho

    1989-01-01T23:59:59.000Z

    , 1958; Frenguelli and Orlando, 1958; Manguin, 1960; Cassie, 1963, Hargraves, 1968; Hasle, 1969; Fenner e! al. , 1976). Quantitative diatom studies have become numemus, but there are still few available for the Antarctic region. Although phytoplankton... studies have covered extensive areas of the Southern Ocean (Hart, 1942; Boden, 1949; Hasle, 1956, 1969; Marumo, 1957; Kozlova, 1966; Zernova, 1970; Steyaert, 1973a, b, 1974; and Jacques er al. , 1979), while very few are related to inshore waters. Only...

  19. Diatom species composition and abundance in water column assemblages from five drill sites in Prydz Bay, Antarctica, Ocean Drilling Program Leg 119: distributional patterns

    E-Print Network [OSTI]

    Kang, Sung-Ho

    1989-01-01T23:59:59.000Z

    . . . . . . . . . . . . . . . . . . . . . 25 6. Contour plots of total full diatom abundance (cells 1 I x 104) in the upper 200 m along the transect at the Prydz Bay drill sites, 18 Jan. - 3 Feb. 1988. (A) Temporal distribution, (B) Spatial distribution.... . . . . . . . . . . . . . . . . . . . 27 7, Contourplotsof total empty diatom abundance (cells 1 I x 104) in the upper 200 m along the transect at the Prydz Bay drill sites, 18 Jan. - 3 Feb. 1988. (A) Temporal distribution, (B) Spatial distribution...

  20. 2009 Community Sequencing Program: Life Under Ice

    SciTech Connect (OSTI)

    Victo Kunin, PhD (Project co-PI) [Project co-PI; Microbial Ecology Group, DOE JGI; Phil Hugenholtz, PhD (CSP Project PI) [CSP Project PI; Microbial Ecology Program Head, DOE JGI

    2008-09-25T23:59:59.000Z

    A JGI Multimedia Presentation: Buried deep beneath the surface of Antarctica is a fresh water lake, Lake Vostok.

  1. Geophys. J. Int. (2009) 178, 729741 doi: 10.1111/j.1365-246X.2009.04158.x GJISeismology

    E-Print Network [OSTI]

    2009-01-01T23:59:59.000Z

    of the Darling Mobile Belt or Pinjarra Orogen into the interior of East Antarctica. Key words: Mantle processes

  2. Contribution of ocean, fossil fuel, land biosphere, and biomass burning carbon fluxes to seasonal and interannual variability in atmospheric CO 2

    E-Print Network [OSTI]

    2008-01-01T23:59:59.000Z

    Antarctica Key Biscayne FL Kumukahi HA Kazakhstan SaryTau Kazakhstan Plateau Wisconsin Tower La Jolla CA Lampedusa

  3. 2009 Community Sequencing Program: Life Under Ice

    ScienceCinema (OSTI)

    Victo Kunin, PhD (Project co-PI); Microbial Ecology Group, DOE JGI; Phil Hugenholtz, PhD (CSP Project PI); Microbial Ecology Program Head, DOE JGI

    2010-09-01T23:59:59.000Z

    A JGI Multimedia Presentation: Buried deep beneath the surface of Antarctica is a fresh water lake, Lake Vostok.

  4. Sea Level Rise, Green Greenland & Fantabulous Inference To be removed from Jim Hansen's e-mail list respond to sender with REMOVE as subject

    E-Print Network [OSTI]

    Hansen, James E.

    Sea Level Rise, Green Greenland & Fantabulous Inference To be removed from Jim Hansen's e-mail list on changes occurring in the past few years on Antarctica and Greenland. Mass loss from West Antarctica within the century is higher for West Antarctica than for Greenland, because West Antarctic ice sits

  5. 12/05/12 11:10Meteorieten uit Antarctica naar Belgi -HLN.be Page 1 of 3http://www.hln.be/hln/nl/961/Wetenschap/article/detail/1355091/2011/11/29/Meteorieten-uit-Antarctica-naar-Belgie.dhtml

    E-Print Network [OSTI]

    Claeys, Philippe

    Stakingsaanzegging treinbestuurders voor 22 mei Wilders: "Rutte slaat als een wildebras om zich heen" Droog maar

  6. The feasibility of reservoir monitoring using time-lapse marine CSEM Arnold Orange1

    E-Print Network [OSTI]

    Key, Kerry

    . Since then, the concept has been embraced with enthusiasm by the exploration in- dustry, mainly. Although addressing these factors may be challenging using current exploration CSEM practices several years ago in a test by Statoil over the Girassol prospect, offshore Angola Ellingsrud et al., 2002

  7. The Oxford Programme on the Changing Character of War

    E-Print Network [OSTI]

    Oxford, University of

    The Oxford Programme on the Changing Character of War Seminars Michaelmas Term 2013 Lunchtime Discussions with Changing Character of War Seminars are at 1.00pm, Seminar Room G, Manor Road Building, Oxford Oliveira (Oxford) War and Peace in Angola Tuesday 22nd October Professor Christopher Coker (LSE) Men at War

  8. AFRICA ASIA SOUTH AMERICA Algeria Afghanistan Argentina

    E-Print Network [OSTI]

    Oxford, University of

    AFRICA ASIA SOUTH AMERICA Algeria Afghanistan Argentina Angola Armenia Bolivia Benin Azerbaijan Senegal Syria Seychelles Taiwan (Republic of China) Sierra Leone Tajikistan Somalia Thailand South Africa Kazakhstan Guinea Korea (North) Guinea-Bissau Korea (South) Kenya Kuwait Lesotho Kyrgyzstan Liberia Lao PDR

  9. We highlight the selective ionization of acidic components of crude oils and naphthenates by negative-ion electrospray

    E-Print Network [OSTI]

    We highlight the selective ionization of acidic components of crude oils and naphthenates sample consumption. Angola and offshore Canadian crude oils and Athabasca bitumen were used as supplied differences of acidic species in crude oils and naphthenates and also afford structural characterization

  10. The Congo deep-sea fan: how far and for how long? A basin-wide view of the interaction between a giant submarine fan

    E-Print Network [OSTI]

    Demouchy, Sylvie

    basement at about 8 s (TWT). The seismic interpretation was carried out using Sismage Research TM software of thousands of km of 2D seismic-reflection profiles from the ZaiAngo project across the Congo-Angola passive to a re-interpretation of the post-rift history of sediment supply in the basin and a reconsideration

  11. INSTITUT D'ECONOMIE ET DE POLITIQUE DE L'ENERGIE

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    INSTITUT D'ECONOMIE ET DE POLITIQUE DE L'ENERGIE La libéralisation du marché gazier européen et ses, Turkménistan, cf. annexe 1), les pays du Golfe, l'Afrique de l'Ouest (Nigeria, Angola), l'Amérique du Sud

  12. Supplement 15, Parasite-Subject Catalogue: Hosts

    E-Print Network [OSTI]

    Humphrey, Judith M.; Segal, Dorothy B.; Beard, Mary I.; Edwards, Shirley J.; Kirby, Margie D.

    1966-01-01T23:59:59.000Z

    Persia Jack, K. M., 1962 a, 289 Persia Jack, K. M., 1962 a, 272, 277 all from Angola Jack, K. M., 1962 a, 283 French Guinea Jack, K. M., 1962 a, 287 British Somaliland, Upper Egypt, Abyssinia Jack, K. M., 1962 a, 287 Kurdistan, Cyprus, South...

  13. LEIOCEPHALIDAE 1989 Leiocephalinae Frost and Etheridge, Misc. Publ. Mus. Nat. Hist. Univ.

    E-Print Network [OSTI]

    , Hispaniola, Navassa, and Martinique. Recently extinct species were found on Barbuda and Antigua, Anguilla, Guadeloupe, Hispaniola, Puerto Rico, and Jamaica. Leiocephalus Gray 1827 Leiocephalus Gray, Philos. Mag, 84: 1. Range: Cuba and nearby islands, the Cayman Islands, the Bahama Islands, Hispaniola

  14. Digestible threonine requirement of starter and finisher swine

    E-Print Network [OSTI]

    Saldana, Carlos Ivan

    1992-01-01T23:59:59.000Z

    . , Panamerican Agricultural School, Honduras, B. S. , Santa Maria La Antigua University, Panama Chair of Advisory Committee: Dr. Darrell A. Knabe Growth tr ials using 198 startei (28-d of age, 6 kg initially, 28 d trial duration) and 120 f inisher (58 kg...

  15. Oyamel fir forest trunks provide thermal advantages for overwintering monarch butterflies in Mexico

    E-Print Network [OSTI]

    Williams, Ernest H.

    Oyamel fir forest trunks provide thermal advantages for overwintering monarch butterflies in Mexico, UniversidadNacionalAutonomadeMexico,AntiguaCarreteraaPa´ tzcuaro,Morelia,Michoacan,Mexico,5 InstitutodeGeografi´aCiudad Universitaria,UniversidadNacionalAutonomadeMexico,Coyoacan,MexicoD.F.,Mexico,6 Departmentof

  16. acid levels contribute: Topics by E-print Network

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

    sea level by 7 m. Keywords: sea level; ice sheet; Greenland; Antarctica; climate change 1 Huybrechts, Philippe 7 Contribution of the Active Site Histidine Residues of...

  17. area networks deployment: Topics by E-print Network

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

    networks of such autonomous solar robots is provided. Index Terms Mobile Robot, Solar Power, Antarctica. I. Laura Ray; Er Price; Er Streeter; Daniel Denton; James H. Lever 138...

  18. Atomistic Model for the Polyamide Formation from ?-Lactam...

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

    Model for the Polyamide Formation from ?-Lactam Catalyzed by Candida Antarctica Lipase B. Atomistic Model for the Polyamide Formation from ?-Lactam Catalyzed by Candida...

  19. E-Print Network 3.0 - acts propagation studies Sample Search...

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

    the Amery Ice Shelf, East Antarctica Summary: An investigation into the forces that drive ice-shelf rift propagation on the Amery Ice Shelf, East... receivers and seismometers...

  20. antarctic dry valley: Topics by E-print Network

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

    UK b Department of Geological Sciences and Institute.V. All rights reserved. Keywords: Uranium isotopes; Dry Valleys; Antarctica; Weathering; Lake chemistry 1 isotopes. The supply...

  1. antarctic dry valleys: Topics by E-print Network

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

    UK b Department of Geological Sciences and Institute.V. All rights reserved. Keywords: Uranium isotopes; Dry Valleys; Antarctica; Weathering; Lake chemistry 1 isotopes. The supply...

  2. Gail Gutowski J.J. Pickle Research Campus, Bldg. 196

    E-Print Network [OSTI]

    Yang, Zong-Liang

    and Evolution (GIMBLE) Project West Antarctica, Dec 2012 ­ Feb 2013 Airborne geophysical survey including radar, LiDAR, gravimetry, and magnetometry. Roles included

  3. antarctic limpet nacella: Topics by E-print Network

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

    than from anywhere else on earth. Contrary to the popular conception of Antarctica, the climate high on the plateau features low wind speeds, mostly clear skies and relatively...

  4. antarctic inter-tidal limpets: Topics by E-print Network

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

    than from anywhere else on earth. Contrary to the popular conception of Antarctica, the climate high on the plateau features low wind speeds, mostly clear skies and relatively...

  5. antarctic climate variability: Topics by E-print Network

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

    ranges poleward. The endemic shelf fauna of Antarctica is especially vulnerable to climate-mediated biological invasions because cold temperatures currently exclude the...

  6. antarctic mesozooplankton community: Topics by E-print Network

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

    ranges poleward. The endemic shelf fauna of Antarctica is especially vulnerable to climate-mediated biological invasions because cold temperatures currently exclude the...

  7. aga mitte kigile: Topics by E-print Network

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

    the Weddell Sea, Antarctica during the Winter Weddell Outflow Study from August until October 2006. Open Access Theses and Dissertations Summary: ??Der pltzliche Abfall der...

  8. azapa valley northern: Topics by E-print Network

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

    Dry Valley lakes, Antarctica Environmental Sciences and Ecology Websites Summary: evaluation of silicon biogeochemistry in the Taylor Valley lakes, Southern Victoria Land, was...

  9. antarctic microalga koliella: Topics by E-print Network

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

    ranges poleward. The endemic shelf fauna of Antarctica is especially vulnerable to climate-mediated biological invasions because cold temperatures currently exclude the...

  10. antarctic monothalamous foraminiferans: Topics by E-print Network

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

    ranges poleward. The endemic shelf fauna of Antarctica is especially vulnerable to climate-mediated biological invasions because cold temperatures currently exclude the...

  11. antarctic midge belgica: Topics by E-print Network

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

    Cranston, Peter S. 8 Dehydration-induced cross tolerance of Belgica antarctica larvae to cold and heat is facilitated by trehalose accumulation Environmental Sciences and Ecology...

  12. 115 year ice-core data from Akademii Nauk ice cap, Severnaya Zemlya: high-resolution record of Eurasian Arctic climate change

    E-Print Network [OSTI]

    Fischer, Hubertus

    ice core has been drilled within the framework of the European Project for Ice Coring in Antarctica of Antarctica. Drilling reached bedrock during the last field season 2005/06 providing ice over a time span. Since Ca2+ is derived from terrestrial dust and marine sources, the non-sea-salt calcium concentrations

  13. Stable isotope (18 Cl) evidence for multiple fluid histories in mid-Atlantic

    E-Print Network [OSTI]

    Long, Bernard

    on sea salt aerosol deposition in the study area of the new EPICA (European Project for Ice Coring in Antarctica) deep drilling in Dronning Maud Land (DML), Antarctica, has been investigated. Comparison of ice core records with reanalysis data showed that recent sea salt concentrations are strongly influenced

  14. Prevalence of the Antarctic Circumpolar Wave over the last two millenia recorded in Dronning Maud Land ice

    E-Print Network [OSTI]

    Fischer, Hubertus

    on sea salt aerosol deposition in the study area of the new EPICA (European Project for Ice Coring in Antarctica) deep drilling in Dronning Maud Land (DML), Antarctica, has been investigated. Comparison of ice core records with reanalysis data showed that recent sea salt concentrations are strongly influenced

  15. 1, 7797, 2007 Reconstructing the

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    expansion of ocean water, changes in terrestrial storage of water, melting of smaller ice caps and glaciers contribution' the contribution to sea-level change from all glaciers and ice caps outside the large ice sheets of Greenland and Antarctica. Included are the glaciers and ice caps on Greenland and Antarctica which

  16. Supplement 20, Part 5, Parasite-Subject Catalogue: Parasites: Arthropoda and Miscellaneous Phyla

    E-Print Network [OSTI]

    Shaw, Judith H.; Hood, Martha W.

    1975-01-01T23:59:59.000Z

    Acanthochondria tenuis Pearse, A. S., [1953 c], 223- n. sp. 225, figs. 97-102 Ogcocephalus nasutus Alligator Harbor, Florida Acanthocolax nov. gen. Vervoort, W., 1969 a, 1, 113- Bomolochidae 115 tod: A. similis nov. spec. Acanthocolax similis Vervoort, W...) Goff, M. L.; Loomis, R. ?.; and Brennan, J. M., 1972 a Acomatacarus (ifyracarus) lemnisconyia n. sp. Lemniscomys striatus Vercammen-Grandjean, P. H., 1957 c, 13, 1 A-15, 17, fig. I Alto Chicapa, Lunda, Angola Giesbrecht, W., 1895 b, 179...

  17. Africa: Prosperous times

    SciTech Connect (OSTI)

    NONE

    1996-08-01T23:59:59.000Z

    Political instability and corruption is the rule, rather than the exception, in Africa`s main producing regions, but exploration and production prospects there are bright and attractive to foreign operators. The paper discusses exploration, drilling, resource development, and production in Nigeria, Libya, Algeria, Egypt, Angola, Congo, Gabon, and Tunisia. The other countries of Africa are briefly mentioned, i.e., Cameroon, Cote D`Ivoire, South Africa, Sudan, Namibia, Equatorial Guinea, Eritrea, Zaire, Mozambique, Ghana, Niger, and Seychelles.

  18. Reservoir and stimulation analysis of a Devonian Shale gas field

    E-Print Network [OSTI]

    Shaw, James Stanley

    1986-01-01T23:59:59.000Z

    . The Gas Research Institute (GRI) which sponsored this work under GRI Contract No. 5084-213-0980, "Analysis of Eastern Devonian Gas Shales Production Data;" 2. Doug Terry and Joe Petty with Union Drilling, Inc. who showed great interest in this study... and enhance productivity. ~St h The Devonian Shales in the Mason County Field study area can be subdivided using gamma ray logs as follows (in descending order): Upper Devonian Undivided, Huron Shale Member of the Ohio Shale, Java Formation, Angola Shale...

  19. Chirac Said “Non” – Or Did He? Revisiting U.S. - UN Diplomacy on the 2003 Iraq War

    E-Print Network [OSTI]

    Rrecchia, Stefano

    2015-01-01T23:59:59.000Z

    could for the most part be financed through sales of Iraqi oil.29 The belief that a protracted stabilization mission would be unnecessary in Iraq further reduced any incentive to secure UN approval as a means of legitimating the war and facilitating... Washington significant leverage over its foreign policy. Germany and Syria, by contrast, were firmly opposed. That put all the weight on the other six nonpermanent members, who remained uncommitted: Mexico, Chile, Pakistan, Angola, Cameroon, and Guinea...

  20. Oil and gas developments in central and southern Africa in 1986

    SciTech Connect (OSTI)

    Hartman, J.B.

    1987-10-01T23:59:59.000Z

    Fewer wells and less footage were drilled in 1986 compared to 1985. Total drilling decreased by 23% as 217 wells were completed compared to 289 in 1985. Footage drilled during 1986 declined by 52%; about 1.3 million ft were drilled compared to about 2.7 million feet in 1985. The success rate for exploration wells of 34% during 1986 is due to considerably higher success rates in Nigeria and Gabon compared to 1985. Significant discoveries were made in Nigeria, Angola, Congo, and Gabon. Seismic acquisition was the major geophysical activity during 1986. Seismic activity (2-D and 3-D) decreased by 12% to about 230 crew-months. Total 2-D seismic kilometers recorded increased by 26% to about 82,000 km due to significant 2-D marine seismic activity in Nigeria and Angola. Surface geology, photogeology, geochemistry, gravimetry, and aeromagnetic surveys decreased compared to 1985. Total oil production in 1986 was 834 million bbl (about 2.2 million BOPD), an increase of 2%, with the most significant increased in Cameroon and Angola. The production share of OPEC countries (Nigeria and Gabon) versus non-OPEC countries increased to 72% in 1986 compared to 67% in 1985. 32 figures, 5 tables.

  1. El CELCIT en la formación teatral latinoamericana

    E-Print Network [OSTI]

    Gené , Juan Carlos

    1993-10-01T23:59:59.000Z

    más producto de la inmigración europea que de antiguas raíces originales; comunidades con fuerte influencia cultural de la negritud y, finalmente, una tajante línea divisoria entre Hispano y Luso América, de naturaleza idiomática. En América Latina... institución me confió su conducción. La tarea comenzó naturalmente en Caracas, por la práctica permanente de talleres que fueron definiendo necesidades y orientaciones. Una década de práctica docente de un equipo de maestros estable, al que se agregaban...

  2. The grotesque in Don Quijote de la Mancha by Miguel de Cervantes Saavedra and The Tyrant by Ramon Del Valle-Inclan 

    E-Print Network [OSTI]

    Peterson, Valerie Hoppe

    1994-01-01T23:59:59.000Z

    LO GROTESCO EN DON UIJOTE DE LA MANCHA POR MIGUEL DE CERVANTES SAAVEDRA Y TIRANO BANDERAS POR RAMON DEL VALLE-INCLAN Tesis por VALERIE HOPPE PETERSON Presentada a la Oficina de Estudios Graduados de Texas A&M University En cumplimiento... socio- psicologico. El estudio del arte popular era el estudio del hombre y su sociedad, sus intereses, su entretenamiento, sus deseos y demandas, sus quejas y criticas. Wright queria apoyar una teori. a antigua que deci. a que lo grotesco expresaba...

  3. El laberinto de la indigenidad: Cómo se determina quién es indígena maya ch’orti’ en Guatemala, Honduras y El Salvador

    E-Print Network [OSTI]

    Metz, Brent

    2012-01-01T23:59:59.000Z

    idioma primero y privilegiado de Dios. Dios prefiere oraciones en ch’orti’. Las fuerzas de la naturaleza personificadas en santos, como las cuatro direcciones, el sol, la tierra, el agua y el viento, son fundamentales en la visión tradicional del..., una dieta con altos porcentajes de maíz y frijoles cocinados con recetas antiguas, trabajo agrícola sin maquinaria, baja educación e incluso menosprecio hacia ella, el uso de yerbas medicinales y la producción de artesanías utilitarias. La raíz de...

  4. Rotordynamic analysis with shell elements for the transfer matrix method

    E-Print Network [OSTI]

    L'Antigua, Edward Anthony

    1989-01-01T23:59:59.000Z

    Committee) Al B. elazzo1o (Member) John T. Tielki g (Member) Michael J. Rabins (Head of Department) August 1989 111 ABSTRACT Rotordynamic Analysis with Shell Elements for the Transi'er Matrix Method. (August 1989) Edward Anthony L'Antigua, B. M... Varying Bending Load with (-') = . 01, and Varying ( ? ) ratio. Table 2. Nondimensional Flexibilities (aEv ) for Cylindrical Sections (8 = 0) with Varying ( ? ) and (?-) Ratios. Table 3. Nondimensional Flexibilities (bEr = oEr ) for Cylindrical...

  5. Antarctic Glossopterids: Clarifying and Comparing Reproductive Structures

    E-Print Network [OSTI]

    Ryberg, Patricia Elizabeth

    2009-08-20T23:59:59.000Z

    Glossopterid reproductive structures, both impressions and permineralizations, have been known from Antarctica for decades, but little detailed work has been done on them to date. Impression fossils from the Central ...

  6. adult female weddell: Topics by E-print Network

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

    Schller, Myriam 2007-01-01 34 Provenance and glacial history of very fine quartz sand from the Weddell Sea, Antarctica Texas A&M University - TxSpace Summary: December 1988...

  7. Systematics and biogeography of the Gondwanan Orthocladiinae (Diptera: Chironomidae)

    E-Print Network [OSTI]

    Cranston, Peter S.

    likely mechanism for transoceanic movement, potentially facilitated by West Wind Drift or anti-cyclone hand, were congruent with the proposed ages of separation of the two continents from Antarctica. Taken

  8. Shear measurements across the northern margin of Whillans Ice Stream

    E-Print Network [OSTI]

    Van Der Veen, C.J.; Jezek, K.; Stearns, Leigh

    2007-01-01T23:59:59.000Z

    Field measurements of surface deformation across the northern shear margin of Whillans Ice Stream, West Antarctica, were analyzed to better understand the processes controlling the position and migration of this margin. Four lines of poles extending...

  9. artificial night sky: Topics by E-print Network

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

    the Canadian High Arctic. Law, Nicholas M; Wulfken, Philip; Ratzloff, Jeffrey; Kavanaugh, Dustin 2014-01-01 110 The i-band Sky brightness and Transparency at Dome A, Antarctica...

  10. Dream big, design intensely, build exceptionally: Department of Electrical and Computer Engineering

    E-Print Network [OSTI]

    Amin, S. Massoud

    -Up Donors Thanks to donations from U of MN alumni Russ Penrose (EE`49) (left) and Micro Control Company CEO became involved in technology called optical borehole logging because of his interest in Antarctica

  11. Investigation of coastal dynamics of the Antarctic Ice Sheet using sequential Radarsat SAR images

    E-Print Network [OSTI]

    Tang, Sheng-Jung

    2009-05-15T23:59:59.000Z

    Increasing human activities have brought about a global warming trend, and cause global sea level rise. Investigations of variations in coastal margins of Antarctica and in the glacial dynamics of the Antarctic Ice Sheet provide useful diagnostic...

  12. Investigation of Glacial Dynamics in the Lambert Glacier-Amery Ice Shelf System (LAS) Using Remote Sensing

    E-Print Network [OSTI]

    Chi, Zhaohui 1982-

    2012-12-10T23:59:59.000Z

    Numerous recent studies have documented dynamic changes in the behaviors of large marine-terminating outlet glaciers and ice streams in Greenland, the Antarctic Peninsula, and West Antarctica. However, fewer observations of outlet glaciers and ice...

  13. Ice shelf-ocean interactions in a general circulation model : melt-rate modulation due to mean flow and tidal currents

    E-Print Network [OSTI]

    Dansereau, Véronique

    2012-01-01T23:59:59.000Z

    Interactions between the ocean circulation in sub-ice shelf cavities and the overlying ice shelf have received considerable attention in the context of observed changes in flow speeds of marine ice sheets around Antarctica. ...

  14. Antarctic sea ice control on ocean circulation in present and glacial climates

    E-Print Network [OSTI]

    Ferrari, Raffaele

    In the modern climate, the ocean below 2 km is mainly filled by waters sinking into the abyss around Antarctica and in the North Atlantic. Paleoproxies indicate that waters of North Atlantic origin were instead absent below ...

  15. SPARTANADVENTURES SPARTAN PATHWAYS

    E-Print Network [OSTI]

    of Patagonia Dog Sledding in Northern Michigan Antarctica February Wolves of Yellowstone Cuba March Mekong, Cozumel, Belize City, Santo Tomas, Roatán, Costa Maya TREASURES OF PATAGONIA (VIA AUSTRALIA) January 11

  16. Designing Marine Protected Areas for the South American Sea Lion (Otaria byronia) in the Argentine Patagonia

    E-Print Network [OSTI]

    Padula, Cynthia Gabriela

    2014-01-01T23:59:59.000Z

    a variability off Patagonia based on SeaWiFS data. JournalD. (2003). Mamíferos marinos de Patagonia y Antártida [Marine mammals of Patagonia and Antarctica]. Buenos Aires:

  17. ECOLOGY AND EVOLUTION SEMINAR SERIES*

    E-Print Network [OSTI]

    Ishida, Yuko

    ECOLOGY AND EVOLUTION SEMINAR SERIES* WINTER 2013 ECL 296 (CRN 50337) / PBG 292 (CRN 64677 24 The Modern Ecology of Ice-Covered Lakes in Antarctica: A Journey Back JANUARY 31 Lizards in an Evolutionary Tree: Ecology and Adaptive Radiation

  18. Massive disturbance of the daytime lower ionosphere by the giant g-ray flare from magnetar SGR 180620

    E-Print Network [OSTI]

    California at Berkeley, University of

    . The perturbations of the 21.4 kHz NPM (Lualualei, Hawaii) signal observed at PA (Palmer Station, Antarctica. 2. Observations [5] The amplitude/phase of NPM signal at PA (the entire >12 Mm path illuminated by g

  19. Control on (234 U) in lake water: A study in the Dry Valleys

    E-Print Network [OSTI]

    Henderson, Gideon

    .V. All rights reserved. Keywords: Uranium isotopes; Dry Valleys; Antarctica; Weathering; Lake chemistry 1 isotopes. The supply of 234 U is therefore limited by decay of 238 U, suggesting that the two uranium

  20. Protist, Vol. 158, 3, January 2007 http://www.elsevier.de/protis

    E-Print Network [OSTI]

    Simpson, Larry

    in the atmosphere over Antarctica is another recent concern since this may allow UV irradiation to affect phytoplankton in the ocean at the base of the world's food chain. Failures of most of the world's fisheries have

  1. Ice sheets

    E-Print Network [OSTI]

    Bentley, Charles G.; Thomas, Robert H.; Velicogna, Isabella

    2007-01-01T23:59:59.000Z

    mitigates recent sea-level rise. Science, 308, 1898-1901J. (2004). Accelerated sea-level rise from West Antarctica.and contributions to sea-level rise: 1992-2002. Journal of

  2. Why Should You Collaborate with the PLHC?

    E-Print Network [OSTI]

    . Adrian Howkins History of climate change, Antarctica, world environmental history · Help measure the scale and consequences of anthropogenic climate change Historic, American West, irrigated landscapes, agriculture, national parks history Dr

  3. The invertebrate fossils of Seymour Island, Antarctic Peninsula, and their role in our understanding of the Eocene climate

    E-Print Network [OSTI]

    Wilson, Mark A.

    The invertebrate fossils of Seymour Island, Antarctic Peninsula, and their role in our;Collins | 2 Cover artwork: Seymour Island ­ Antarctica 2003 By: Kurtis Burmeister National Science Foundation Source: Antarctic Photo Library United States Antarctic Program #12;Collins | 3 TABLE

  4. Turmoil doesn`t dampen enthusiasm

    SciTech Connect (OSTI)

    NONE

    1997-08-01T23:59:59.000Z

    The paper discusses the outlook for the African gas and oil industries. Though Africa remains politically and economically volatile, its vast energy potential is becoming increasingly attractive to foreign oil and gas companies. Separate evaluations are given for Algeria, Egypt, Nigeria, Angola, Libya, Congo, Gabon, Tunisia, Cameroon, Cote D`Ivoire, and briefly for South Africa, Sudan, Equatorial Guinea, Ghana, Zaire, Benin, Mozambique, Chad, Namibia, Tanzania, Eritrea, Guinea-Bissau, Senegal, Morocco, Sao Tome and Principe, Ethiopia, Niger, Madagascar, Rwanda, Mauritania, Seychelles, Uganda, and Liberia.

  5. Africa: Unrest and restrictive terms limit abundant potential. [Oil and gas exploration and development in Africa

    SciTech Connect (OSTI)

    Not Available

    1993-08-01T23:59:59.000Z

    This paper summarizes the drilling and exploration activity of the oil and gas industries of Egypt, Libya, Tunisia, Algeria, Morocco, Nigeria, Cameroon, Gabon, the Congo, Angola, and South Africa. Information is provided on current and predicted trends in well drilling activities (both onshore and offshore), numbers of new wells, footage information, production statistics and what fields accounted for this production, and planned new exploration activities. The paper also describes the current status of government policies and political problems affecting the oil and gas industry.

  6. Angold 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcat Place:Alvan2809328°,Anfu Guanshan HydropowerTexas:Angola

  7. Anhui Jinli Corporation | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcat Place:Alvan2809328°,Anfu Guanshan HydropowerTexas:AngolaAnhui

  8. Anhui Jinli Power Development Co Ltd | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcat Place:Alvan2809328°,Anfu Guanshan HydropowerTexas:AngolaAnhuiCo

  9. On-Site Wastewater Treatment Systems: Sand Filters (Spanish)

    E-Print Network [OSTI]

    Lesikar, Bruce J.; Enciso, Juan

    2000-10-13T23:59:59.000Z

    Arena filtrante Fosa s?ptica de dos compartimientos con c?mara de bombeo Descarga al campo de absorci?n L-5229S 8-00 Figura 1: Un sistema de filtro de arena. Sistemas individuales para el tratamiento de aguas negras Filtro de arena Bruce Lesikar y... Juan Enciso Promotores Especialistas de Ingenier?a Agr?cola El Sistema Universitario Texas A&M L a filtraci?n por arena es una de las tecnolog?as de tratamiento de aguas negras m?s antiguas que se conoce. Si se dise?a, construye, opera y mantiene...

  10. Oil and gas developments in central and southern Africa in 1987

    SciTech Connect (OSTI)

    Hartman, J.B.; Walker, T.L.

    1988-10-01T23:59:59.000Z

    Significant rightholding changes took place in central and southern Africa during 1987. Angola, Benin, Congo, Gabon, Ghana, Guinea, Guinea Bissau, Mauritania, Seychelles, Somali Republic, Tanzania, Zaire, and Zambia announced awards or acreage open for bidding. Decreases in exploratory rightholdings occurred in Cameroon, Congo, Cote d'Ivoire, Equatorial Guinea, Gabon, Kenya, Namibia, South Africa, and Tanzania. More wells and greater footage were drilled in 1987 than in 1986. Total wells increased by 18% as 254 wells were completed compared to 217 in 1986. Footage drilled during the year increased by 46% as about 1.9 million ft were drilled compared to about 1.3 million ft in 1986. The success rate for exploration wells in 1987 improved slightly to 36% compared to 34% in 1986. Significant discoveries were made in Nigeria, Angola, Congo, and Gabon. Seismic acquisition in 1987 was the major geophysical activity during the year. Total oil production in 1987 was 773 million bbl (about 2.1 million b/d), a decrease of 7%. The decrease is mostly due to a 14% drop in Nigerian production, which comprises 60% of total regional production. The production share of OPEC countries (Nigeria and Gabon) versus non-OPEC countries of 67% remained unchanged from 1986. 24 figs., 5 tabs.

  11. African oil plays

    SciTech Connect (OSTI)

    Clifford, A.J. (BHP Petroleum, Melbourne, Victoria (Australia))

    1989-09-01T23:59:59.000Z

    The vast continent of Africa hosts over eight sedimentary basins, covering approximately half its total area. Of these basins, only 82% have entered a mature exploration phase, 9% have had little or no exploration at all. Since oil was first discovered in Africa during the mid-1950s, old play concepts continue to bear fruit, for example in Egypt and Nigeria, while new play concepts promise to become more important, such as in Algeria, Angola, Chad, Egypt, Gabon, and Sudan. The most exciting developments of recent years in African oil exploration are: (1) the Gamba/Dentale play, onshore Gabon; (2) the Pinda play, offshore Angola; (3) the Lucula/Toca play, offshore Cabinda; (4) the Metlaoui play, offshore Libya/Tunisia; (5) the mid-Cretaceous sand play, Chad/Sudan; and (6) the TAG-I/F6 play, onshore Algeria. Examples of these plays are illustrated along with some of the more traditional oil plays. Where are the future oil plays likely to develop No doubt, the Saharan basins of Algeria and Libya will feature strongly, also the presalt of Equatorial West Africa, the Central African Rift System and, more speculatively, offshore Ethiopia and Namibia, and onshore Madagascar, Mozambique, and Tanzania.

  12. Technique for continuous high-resolution analysis of trace substances in firn and ice cores

    SciTech Connect (OSTI)

    Roethlisberger, R.; Bigler, M.; Hutterli, M.; Sommer, S.; Stauffer, B.; Junghans, H.G.; Wagenbach, D.

    2000-01-15T23:59:59.000Z

    The very successful application of a CFA (Continuous flow analysis) system in the GRIP project (Greenland Ice Core Project) for high-resolution ammonium, calcium, hydrogen peroxide, and formaldehyde measurements along a deep ice core led to further development of this analysis technique. The authors included methods for continuous analysis technique. The authors included methods for continuous analysis of sodium, nitrate, sulfate, and electrolytical conductivity, while the existing methods have been improved. The melting device has been optimized to allow the simultaneous analysis of eight components. Furthermore, a new melter was developed for analyzing firn cores. The system has been used in the frame of the European Project for Ice Coring in Antarctica (EPICA) for in-situ analysis of several firn cores from Dronning Maud Land, Antarctica, and for the new ice core drilled at Dome C, Antarctica.

  13. Re-evaluation of total and Umkehr ozone data from NOAA-CMDL Dobson spectrophotometer observatories. Final report

    SciTech Connect (OSTI)

    Komhyr, W.D.; Quincy, D.M.; Grass, R.D.; Koenig, G.L. [Univ. of Colorado, Boulder, CO (United States)] [Univ. of Colorado, Boulder, CO (United States); [National Oceanic and Atmospheric Administration, Boulder, CO (United States). Climate Monitoring and Diagnostics Lab.

    1995-12-01T23:59:59.000Z

    This report describes work to improve the quality of total ozone and Umkehr data obtained in the past at the NOAA Climate Monitoring and Diagnostics Laboratory and the Dobson spectrophotometer ozone observatories. The authors present results of total ozone data re-evaluations for ten stations: Byrd, Antarctica; Fairbanks, Alaska; Hallett, Antarctica; Huancayo, Peru; Haute Provence, France; Lauder, New Zealand; Perth, Australia; Poker Flat, Alaska; Puerto Montt, Chile; and South Pole, Antarctica. The improved data will be submitted in early 1996 to the World Meteorological Organization (WMO) World Ozone Data Center (WODC), and the Atmospheric Environment Service for archiving. Considerable work has been accomplished, also, in reevaluating Umkehr data from seven of the stations, viz., Huancayo, Haute Provence, Lauder, Perth, Poker Flat, Boulder, Colorado; and Mauna Loa, Hawaii.

  14. The Antarctic climate anomaly and galactic cosmic rays

    E-Print Network [OSTI]

    Svensmark, H

    2006-01-01T23:59:59.000Z

    It has been proposed that galactic cosmic rays may influence the Earth's climate by affecting cloud formation. If changes in cloudiness play a part in climate change, their effect changes sign in Antarctica. Satellite data from the Earth Radiation Budget Experiment (ERBE) are here used to calculate the changes in surface temperatures at all latitudes, due to small percentage changes in cloudiness. The results match the observed contrasts in temperature changes, globally and in Antarctica. Evidently clouds do not just respond passively to climate changes but take an active part in the forcing, in accordance with changes in the solar magnetic field that vary the cosmic-ray flux.

  15. Ecological Modelling 221 (2010) 11841193 Contents lists available at ScienceDirect

    E-Print Network [OSTI]

    Priscu, John C.

    2010-01-01T23:59:59.000Z

    abundance and primary production in Lake Hoare, Antarctica Radu Herbeib, , W. Berry Lyonsb , Johanna and Southern Ocean Studies, University of Tasmania, Hobart, Australia b The Ohio State University, Columbus, OH Keywords: Lake Hoare MCM-LTER Bayesian methods Correlation analysis Gaussian Markov random fields a b s t r

  16. Effect of atmospheric water vapor on modification of stable isotopes in near-surface snow on ice sheets

    E-Print Network [OSTI]

    Walden, Von P.

    in the near-surface snow of East Antarctica. The processes of forced ventilation, pore-space diffusion to forced ventilation for several annual cycles. Postdepositional modification during the Last Glacial. Introduction [2] Stable isotopes of water in polar snow and ice have long been regarded as proxies for local

  17. Ann. Geophys., 25, 20452051, 2007 www.ann-geophys.net/25/2045/2007/

    E-Print Network [OSTI]

    Boyer, Edmond

    , re- lated to field aligned currents flowing along the geomagnetic Correspondence to: L. Cafarella the 2004­2005 summer expedition in Antarctica, a geomagnetic French-Italian observatory was installed; UT=LT-8) very close to the geomagnetic pole. In this paper we present some pecu- liarities

  18. Atmos. Chem. Phys., 13, 21652175, 2013 www.atmos-chem-phys.net/13/2165/2013/

    E-Print Network [OSTI]

    Meskhidze, Nicholas

    with cyclone depth (energy) and wind intensity around Antarctica. 1 Introduction Since the mid-1980s the ozone-013, Rio de Janeiro, RJ, Brazil 2Centro Polar e Clim´atico, Instituto de Geoci^encias, UFRGS, Av. Bento Goncalves 9500, 91501-970, Porto Alegre, RS, Brazil 3Environmental Engineering Department, Federal

  19. OCTOBER 1998 1999S T O S S E L E T A L . 1998 American Meteorological Society

    E-Print Network [OSTI]

    Drijfhout, Sybren

    of brine release due to sea ice formation and that of employing more variable winds over SO sea ice. 1 that, by brine release through sea ice formation. Sea ice modifies the heat exchange and freshwater regions around Antarctica is often enhanced by the addition of brine associated with freezing (e

  20. ANTARCTIC SEA ICE BIOLOGICAL PROCESSES, INTERACTIONS, AND VARIABILITY ANTARCTIC RESEARCH SERIES, VOLUME 73, PAGES 45-83

    E-Print Network [OSTI]

    Moline, Mark

    conducted in pack ice communities that flowed into the vicin- ity of Palmer Station, Antarctica, between August and November, 1993. Pack ice provided incomplete protection to frazil ice algae from the damaging--../ ANTARCTIC SEA ICE BIOLOGICAL PROCESSES, INTERACTIONS, AND VARIABILITY ANTARCTIC RESEARCH

  1. Iceberg Paper Published in Geophysical Research Letters 29(7), 10.1029/2001 GLO, 2002

    E-Print Network [OSTI]

    Ross Sea, Antarctica, restricted the normal drift of pack ice, resulting in heavier spring/ summer pack formation of the Ross Sea polynya, a region of diminished sea ice cover in the midst of heavy pack ice north ecosystems. The B-15 iceberg, which calved off the Ross Ice Shelf in the biologically productive southwestern

  2. Paleogene cooling (55-30 MA) as inferred from oxygen isotope variation within mollusc shells

    E-Print Network [OSTI]

    Kobashi, Takuro

    2001-01-01T23:59:59.000Z

    by the sudden appearance of a major continental glacier on Antarctica. We examine this cooling trend by analyzing oxygen isotope variation within mollusc shells from the Gulf Coastal Plain of the southern U.S. Our records show a secular cooling trend of mean...

  3. Bacteria beneath the West Antarctic Ice Sheet Brian Lanoil,1

    E-Print Network [OSTI]

    Priscu, John C.

    Bacteria beneath the West Antarctic Ice Sheet Brian Lanoil,1 * Mark Skidmore,1 John C. Priscu,2, particularly those that lie beneath polar ice sheets, are beginning to be recog- nized as an important part Vostok, Antarctica, no sub-ice sheet environments have been shown to support microbial ecosystems. Here

  4. 4, 709732, 2007 Ice-shelf ocean

    E-Print Network [OSTI]

    Boyer, Edmond

    OSD 4, 709­732, 2007 Ice-shelf ­ ocean interactions at Fimbul Ice Shelf M. R. Price Title Page published in Ocean Science Discussions are under open-access review for the journal Ocean Science Ice-shelf ­ ocean interactions at Fimbul Ice Shelf, Antarctica from oxygen isotope ratio measurements M. R. Price 1

  5. Origin and Phylogeny of Microbes Living in Permanent Antarctic Lake Ice

    E-Print Network [OSTI]

    Priscu, John C.

    Origin and Phylogeny of Microbes Living in Permanent Antarctic Lake Ice D. A. Gordon,1, * J. Priscu of bacteria and cyanobacteria colonizing sediment particles in the per- manent ice cover of an Antarctic lake collected from a depth of 2.5 m in the 4-m-thick ice cover of Lake Bonney, McMurdo Dry Valleys, Antarctica

  6. Eos, Vol. 91, No. 29, 20 July 2010 Water and wet sediments under ice sheets

    E-Print Network [OSTI]

    Priscu, John C.

    Eos, Vol. 91, No. 29, 20 July 2010 Water and wet sediments under ice sheets can play an important role in regulating the rate of ice stream flow in Antarctica, particularly over short time scales. Indeed, the discharge of subglacial lakes has been linked to an increase in ice velocity of Byrd Glacier

  7. Joseph S. Levy Research Scientist Associate

    E-Print Network [OSTI]

    Yang, Zong-Liang

    ://people.oregonstate.edu/~levyjos/index.html http://www.ig.utexas.edu/people/staff/jlevy/ Education Postdoc College of Earth, Ocean, & Atmospheric Change in Garwood Valley: Monitoring Buried Glacier Melt and Exploring `Péwé's Lost Lake' (NSF Office Valley, Antarctica. (NSF Office of Polar Programs Antarctic Earth science Division. Award ANT-1142184 PI

  8. Beryllium and Other Trace Elements in Paragneisses and Anatectic Veins of the

    E-Print Network [OSTI]

    Sandiford, Mike

    Beryllium and Other Trace Elements in Paragneisses and Anatectic Veins of the Ultrahigh-bearing paragneisses. KEY WORDS: Antarctica; beryllium; granulite facies; microprobe; sapphirine INTRODUCTION Beryllium in granitic pegmatites where beryllium minerals, most com- monly beryl, are found (e.g. London & Evensen, 2002

  9. Soil Biology & Biochemistry 38 (2006) 30013002 A synthesis of soil biodiversity and ecosystem functioning in

    E-Print Network [OSTI]

    Wall, Diana

    2006-01-01T23:59:59.000Z

    and ecosystem functioning in Victoria Land, Antarctica Since the 1970s, ecological research on the ice and nutritional resources. These ecosystems are taxonomically and functionally simple, thus providing and comprehensively than is normally the case for soils and to link soil species explicitly with ecosystem functioning

  10. The effect of energetic electron precipitation on middle mesospheric night-time ozone during and after a moderate

    E-Print Network [OSTI]

    Bergen, Universitetet i

    mainly by large fluxes of high-energy protons with energies >100 MeV, has been observed and modeled 14 November 2012. [1] Using a ground-based microwave radiometer at Troll Station, Antarctica (72 S, 2 satellite data were used to identify the precipitating particles and to characterize their energy, spatial

  11. Ice Stream C slowdown is not stabilizing West Antarctic Ice Sheet S Anandakrishnan RB Alleyy

    E-Print Network [OSTI]

    Jacobel, Robert W.

    Ice Stream C slowdown is not stabilizing West Antarctic Ice Sheet S Anandakrishnan RB Alleyy RW Jacobelz H Conwayx March 24, 1999 Abstract Changes in the flow of ice stream C likely indicate a continuing part of ice stream C, West Antarctica largely stagnated over the last few centuries, while upglacier

  12. Surface Impedance Tomography for Antarctic Sea Ice

    E-Print Network [OSTI]

    Golden, Kenneth M.

    Surface Impedance Tomography for Antarctic Sea Ice C. Sampsona , K. M. Goldena , A. Gullya , A. P, Australia Abstract During the 2007 SIPEX expedition in pack ice off the coast of East Antarctica, we measured the electrical conductivity of sea ice via surface impedance tomography. Resistance data from

  13. Sea Ice in the Global Climate System Kenneth M. Golden1

    E-Print Network [OSTI]

    Golden, Kenneth M.

    Sea Ice in the Global Climate System Kenneth M. Golden1 , Elizabeth Hunke2 , Cecilia Bitz3 Figure 2. The Antarctic sea ice pack with an open lead in the distance. (K. M. Golden) Figure 1. Pancake ice in the Southern Ocean off the coast of East Antarctica. (K. M. Golden

  14. IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, VOL. 40, NO. 7, JULY 2002 1605 Surface Roughness Characterizations of Sea Ice and

    E-Print Network [OSTI]

    Kurapov, Alexander

    , surface roughness data from airborne laser altimeter transects correlate well with MISR-derived estimates of surface roughness. In Antarctica, ablation-related blue-ice areas, which are difficult to distinguish from bare ice exposed by crevasses, are easily detected using multiangular data. These unusual ablation

  15. New study details glacier ice loss following ice shelf July 25, 2011

    E-Print Network [OSTI]

    Cambridge, University of

    of several ice shelves in Antarctica led to acceleration of the glaciers that feed into them. CombiningNew study details glacier ice loss following ice shelf collapse July 25, 2011 Contact: Anthony Lane further demonstrates how important ice shelves are to Antarctic glaciers.' Shuman is lead author

  16. VOLUME 93 NUMBER 8 21 FEBRUARY 2012

    E-Print Network [OSTI]

    Howat, Ian M.

    transverse rift developed across the floating terminus of West Antarctica's Pine Island Glacier, less than 5 years after its last large calving event, in 2007 (Figure 1). Pine Island Glacier's retreat has accelerated sub- stantially in the past 2 decades, and it is now losing 50 gigatons of ice per year

  17. Production rate of cosmogenic 21 Ne in quartz estimated from 10

    E-Print Network [OSTI]

    Shuster, David L.

    Production rate of cosmogenic 21 Ne in quartz estimated from 10 Be, 26 Al, and 21 Ne concentrations Antarctica production rate calibration We estimated the production rate of 21 Ne in quartz using a set production rate. As the erosion rate can be determined from 10 Be and 26 Al concentrations, this allows

  18. Data Center Selected Data Sets and Data Collections Complete data set listings available through each individual data center. For more information about NASA's

    E-Print Network [OSTI]

    Sheet Melt Characteristics Derived from Passive Microwave Data· GLAS/ICESat 500 m Laser Altimetry1 Physical Properties Data Center Selected Data Sets and Data Collections Complete data set Digital Elevation Model of Antarctica· GLAS/ICESat 1 km Laser Altimetry Digital Elevation Model

  19. A. Camacho, et al., Int. J. of Design & Nature and Ecodynamics. Vol. 7, No. 3 (2012) 239250 2012 WIT Press, www.witpress.com

    E-Print Network [OSTI]

    Justel Eusebio, Ana

    of Mathematics, Universidad Autónoma de Madrid, Spain. 6Agencia Estatal de Meteorologia, Spain. ABSTRACT Remote, environmental prognoses, Maritime Antarctica, regional warming, remote lakes, sensor systems, simple food webs in hydrology, biogeo- chemical cycles and the composition of biological communities and species interactions

  20. Global Climate Change and Demand for Energy

    E-Print Network [OSTI]

    Subramanian, Venkat

    -CARES) Washington University in St. Louis #12;9 Jun ­ Jul ­ Aug Temperature Anomaly Distribution Frequency of air and water temperatures Losses of ice from Greenland and Antarctica Sea-level rise Energy demands 169 390 327 90 16 H2O, CO2, O3 Earth receives visible light from hot Sun and Earth radiates to space

  1. Water plays a different role on activation thermodynamic parameters of alcoholysis reaction catalyzed by Lipase in gaseous and organic media

    E-Print Network [OSTI]

    Boyer, Edmond

    on catalysis [3]. Indeed, by varying the partial pressure of each compound in the carrier gas, it is possible by immobilized Candida antarctica lipase B (CALB) has been compared in a continuous solid/gas reactor of activation in the gas phase were different from the ones in the organic phase, the inverse trends being

  2. ORIGINAL PAPER Identity and physiology of a new psychrophilic eukaryotic

    E-Print Network [OSTI]

    Priscu, John C.

    in response to environmental change than other well studied cold-adapted chlorophytes. Keywords Antarctica Á version of this article (doi:10.1007/s00792-008-0176-4) contains supplementary material, which. Czymmek Á T. E. Hanson Delaware Biotechnology Institute, University of Delaware, 15 Innovation Way, Newark

  3. IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, VOL. 37, NO. 3, MAY 1999 1671 Cryosphere Applications of NSCAT Data

    E-Print Network [OSTI]

    Long, David G.

    IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, VOL. 37, NO. 3, MAY 1999 1671 Cryosphere covering Greenland and Antarctica add to the polar heat sink effect by their additional influence upon. Hence, monitoring of polar ice is of particular interest to the remote sensing and climate change

  4. Annales Geophysicae, 23, 24252432, 2005 SRef-ID: 1432-0576/ag/2005-23-2425

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    in annual global irradiance based on data from the Global Energy Balance Archive (GEBA) on a 2.5Ã? 2. The statistical analysis showed that atmospheric transmission under clear conditions decreased rapidly across the world has been reduced by about 10% from 1960 to 1990. These include stations in Antarctica

  5. CUSTOM INTEGRATED AMPLIFIER CHIP FOR VLF MAGNETIC RECEIVER

    E-Print Network [OSTI]

    chips. With these new opportunities for using BJTs in integrated designs, low frequency amplifiers used in low noise applications can be integrated for the first time. In this thesis, a low impedance custom, and noise specifications for long term deployment in Antarctica. The low impedance magnetic antenna (1 ­1 m

  6. Primer on glacier flows Christian Heining

    E-Print Network [OSTI]

    Sainudiin, Raazesh

    Primer on glacier flows Christian Heining University of Bayreuth, Germany, Department of Applied Mechanics and Fluid Dynamics 1. Why is it important to understand the physics of glaciers? - Glaciers ocean sediments (ice shelfs in antarctica) o pollen - Glaciers contribute to the raise

  7. Glacier-climate studies in New Zealand Researchers in the Antarctic Research Centre have increasingly

    E-Print Network [OSTI]

    IceSked Glacier-climate studies in New Zealand Researchers in the Antarctic Research Centre have glacier fluctuations, mass balance measurements and ice core records in Antarctica and New Zealand allows of the Franz Josef Glacier. Andrew has recently secured a Victoria University Post-doctoral Fellowship

  8. THE CONTRIBUTION OF GREENLAND ICE SHEET MELTING TO

    E-Print Network [OSTI]

    THE CONTRIBUTION OF GREENLAND ICE SHEET MELTING TO GLOBAL SEA-LEVEL CHANGE Conor Mc three major sources, the Greenland ice sheet, Antarctica, and other eustatic components. Each has its own predictable spatial signal, and particular attention was paid to the Greenland ice sheet, given

  9. This is the sixth annual "Major Sponsored Programs and Faculty Awards for Research and Creative Activity" report. This booklet

    E-Print Network [OSTI]

    Farritor, Shane

    in the past year, setting new drilling records in Antarctica, winning the nation's highest honor for technology and building an ultra-fast, high-intensity laser that has the highest combination of peak power and repetition rate of any U.S. laser. Our sponsored funding continues to grow, with awards of $171.9 million

  10. Letting Go: True autonomy in an AUV

    E-Print Network [OSTI]

    Griffiths, Gwyn

    Will be needed if we are to explore the ocean beneath EuropaÕs ice-covered surface. #12;Satellite images,000 feet Which is which? #12;Face of the Ronne Ice Shelf, Antarctica `To penetrate this barrier) Distancefromseasurface(m) Start Point Surfacing for GPS position fixing Terrain Following #12;Studies in Upper Ocean

  11. Geophysical Fluid Dynamics Laboratory Review

    E-Print Network [OSTI]

    ice from continent out to open ocean to melt ­ Avoids coldfresh bias around Antarctica (led to excess seaice) · Lagrangian model of icebergs · Exporting fresh cap beyond shelf edge increases is most useful for ocean climate? ­ Some issues affecting zcoords also affect hybrid coords if coordinate

  12. IOP PUBLISHING ENVIRONMENTAL RESEARCH LETTERS Environ. Res. Lett. 7 (2012) 034029 (8pp) doi:10.1088/1748-9326/7/3/034029

    E-Print Network [OSTI]

    2012-01-01T23:59:59.000Z

    ice caps covering less than 50 000 km2 and other permanent ice globally outside of Antarctica.1088/1748-9326/7/3/034029 The contribution of glacier melt to streamflow Neil Schaner1, Nathalie Voisin2, Bart Nijssen1 and Dennis P Asia region. Keywords: glacier melt, streamflow S Online supplementary data available from stacks

  13. The Earth had been a very warm and pleasant planet for more

    E-Print Network [OSTI]

    Archimedes and the bath tub), but if the ice caps of Greenland or Antarctica were to melt (or slide, Earth would have been clearly recognisable from space as a green and blue planet with ice caps on both), and we may be on our way back to the single-capped planet of the Pliocene. Ice loss In the last 30 years

  14. Postdoctoral position Antarctic ice sheet modelling Free University of Brussels (VUB)

    E-Print Network [OSTI]

    Huybrechts, Philippe

    systems and ice caps, and in ice sheets in both polar regions (Greenland and Antarctica). The project as improved treatments for basal processes (basal sliding below ice sheet, basal melting below ice shelvesPostdoctoral position ­ Antarctic ice sheet modelling Free University of Brussels (VUB) The Ice

  15. The Cryosphere, 1, 5965, 2007 www.the-cryosphere.net/1/59/2007/

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    ). Thermal expansion of ocean water, changes in terrestrial storage of water, melting of smaller ice caps by "glacier contribu- tion" the contribution to sea-level change from all glaciers and ice caps outside the large ice sheets of Greenland and Antarctica. Included are the glaciers and ice caps on Green- land

  16. Scientific news Actualidad cientifica Actualit scientifique

    E-Print Network [OSTI]

    outburst floods from the ice caps. The largest increase, known by paleoclimatologists as `Melt-Water Pulse have risen by 120m, largely caused by the melting polar ice caps (shown here in Antarctica). Retracing/J.Orempuller©Univ.Colorado/A.Jennings Exceptional rise in sea levels revealed #12;to Melt-Water Pulse 1A, particularly the Laurentide ice cap

  17. INTERNATIONAL JOURNAL OF ENERGY RESEARCH Int. J. Energy Res. (2009)

    E-Print Network [OSTI]

    Ashley, Michael C. B.

    2009-01-01T23:59:59.000Z

    , high-efficiency diesel generator selected to power remote experiments on the Antarctic plateau Wiley & Sons, Ltd. KEY WORDS: diesel engine; high altitude; antarctica; remote generation 1-efficiency diesel generators. Six of these generators are installed in PLATO, the PLATeau Observatory [3

  18. Tim Naish, Senior Scientist at the Institute of Geological and Nuclear Sciences (GNS) has started a part time position as Deputy Director of the Antarctic Research Centre. Tim

    E-Print Network [OSTI]

    Drilling) Project, leading a combined Foundation for Research Science and Technology grant to ARC, GNS partnerships with organisations such as Webster Drilling and Antarctica New Zealand, which are so crucial to work at GNS, leading research projects in New Zealand Quaternary climate history. Tim gained his Ph

  19. On 26th December 2006, at the ANDRILL McMurdo Ice Shelf (MIS) drill site, the final section of core was retrieved from the

    E-Print Network [OSTI]

    on the cores at the drill site. ANDRILL was one of the largest projects ever supported by Antarctica New: Technology Gives Scientists Plenty to Work On The ANDRILL drill site team Looking up the drilling mast #12;IIceSked On 26th December 2006, at the ANDRILL McMurdo Ice Shelf (MIS) drill site, the final section

  20. Clim. Past, 3, 243259, 2007 www.clim-past.net/3/243/2007/

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    , Sendai, Japan 6Physics Institute, University of Bern, Switzerland 7New Energy Resources Research Center, Kitami Institute of Technology, Kitami, Japan 8Frontier Collaborative Research Center, Yokohama, Japan to construct the age scales at the Dome C and Dome Fuji drilling sites (East Antarctica). The poorly

  1. http://research.unl.edu ANNUALREPORT20062007

    E-Print Network [OSTI]

    Farritor, Shane

    drilling records in Antarctica, winning the nation's highest honor for technology and building an ultra and international collaborations is propelling our research into new arenas, producing new products and technologies at the University of Nebraska­Lincoln have pushed the frontiers in their disciplines in the past year, setting new

  2. Summer STEM Institute for K12 Educators

    E-Print Network [OSTI]

    Virginia Tech

    Jacomen As new technologies enter the classroom, some of the best are hanging right on your classroom wall.m. ­ 1:00 p.m. 9:00 a.m. ­ 1:00 p.m. Interactive Learning Boards and Smartboard Technology z Royce for elementary science curriculum grades 2-5. ANDRILL's (Antarctica Geological Drilling) Environmental Literacy

  3. 3, 1961, 2007 Ice flow modelling at

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    , Switzerland 7 New Energy Resources Research Center, Kitami Institute of Technology, Kitami, Japan 8 Frontier drilling sites (East Antarctica). The poorly constrained glaciological parameters at each site drilling sites, which is also characterized by bumps corresponding to variations in surface elevation

  4. MBA Member Marine Policy Form Please return to the MBA via

    E-Print Network [OSTI]

    Watson, Andrew

    strategies Additional Comments and information: Regions Regions Cont. England Latin America and Caribbean England Energy (Oil and gas) Species status/protection Scotland Energy (renewable) Water quality Northern United Kingdom Central and South Asia Europe Artic and Antarctica North America Australasia #12;

  5. Africa: It's good news, bad news - again

    SciTech Connect (OSTI)

    Not Available

    1986-08-01T23:59:59.000Z

    This article presents the outlook for African petroleum. Observations include: Nigerian oil revenues will be $6-7 billion this year, down 50% from '84; Egyptian drillers are still going strong in the Western Desert and Gulf of Suez; Algeria is looking for natural gas buyers, and they have plenty of gas to sell-cheap; Even with new petroleum legislation, Tunisian production and reserves are falling; Libya's bozo leader is feeling the effects of falling oil revenues and falling bombs; Angola continues as a hot spot of activity with 42 successful oil strikes last year; Crude production jumped 29% in Cameroun last year with three new fields onstream; Congo is another West African winner due to major commitments by Elf and Agip.

  6. San Jose Accord: energy aid or petroleum-marketing strategy

    SciTech Connect (OSTI)

    Not Available

    1982-09-30T23:59:59.000Z

    The San Jose Accord was signed in San Jose, Costa Rica on August 3, 1980 by the Presidents of Venezuela and Mexico, whereby the two countries mutually committed to supply the net imported domestic oil consumption of several Central American and Caribbean countries. Countries initially participating in the program are: Barbados, Costa Rica, Dominican Republic, El Salvador, Guatemala, Honduras, Jamaica, Nicaragua, and Panama. Seven eastern Caribbean countries were to meet on October 7 to petition for inclusion in the Accord, namely: Antigua, St. Kitt/Nevis, Montserrat, Dominica, St. Lucia, St. Vincent, and Grenada. The official language of the Accord is presented, and the operative status of the Accord two years after signing is discussed. Specific briefs about some of the individual countries in the Accord are included. The fuel price/tax series for the Western Hemisphere countries is updated.

  7. Development and operation of a photovoltaic power system for use at remote Antarctic sites

    SciTech Connect (OSTI)

    Piszczor, M.F.; Kohout, L.L.; Manzo, M. [National Aeronautics and Space Administration, Cleveland, OH (United States). Lewis Research Center; Colozza, A.J. [NYMA, Brook Park, OH (United States)

    1994-12-31T23:59:59.000Z

    A photovoltaic power system, designed and built at the NASA Lewis Research Center, has successfully operated over the past two summer seasons at a remote site in Antarctica, providing utility-type power for a six-person field team. The system was installed at the Lake Hoare site for approximately five weeks during late 1992, put into storage for the Antarctic winter, and then used again during the 1993 season. The photovoltaic power system consists of three silicon photovoltaic sub-arrays delivering a total of 1.5 kWe peak power, three lead-acid gel battery modules supplying 2.4 kWh, and an electrical distribution system which delivers 120 Vac and 12 Vdc to the user. The system worked extremely well in providing quiet, reliable power. The experience gained from early system demonstrations such as this should be beneficial in accelerating the transition toward future PV systems in Antarctica and other similar areas.

  8. 90E 120 150 180 210 240 270 300 330 0 30 60 OCEAN ATLANTIC

    E-Print Network [OSTI]

    GREENLAND EUROPE AFRICA SOUTH AMERICA NORTH AMERICA ASIA AUSTRALIA ANTARCTICA INDIAN OCEAN PACIFIC OCEAN ATLANTIC OCEAN ARCTIC OCEAN 418 625 626-636 637-641 642-644 645 646 647 648-649 650-656 657-659 660-661 662 1102-1103 1104-1106 1107 1108-1118 1119 1120 1121 1122 1123 1124 1125 1126-1134 998-1001 SOUTHERN OCEAN

  9. 90E 120 150 180 210 240 270 300 330 0 30 60 SOUTH AMERICA

    E-Print Network [OSTI]

    GREENLAND EUROPE AFRICA SOUTH AMERICA NORTH AMERICA ASIA AUSTRALIA ANTARCTICA INDIAN OCEAN PACIFIC OCEAN Reentry cone use 126/793B 127/797C 210/1276A,B 45/395A 127/794C PACIFIC OCEAN #12; ATLANTIC OCEAN ARCTIC OCEAN 44/390A 86/577,A,B 113/689B 113/690C 119/738C 120/750A 121/752B 122/761C 122

  10. PILOT and cosmic shear

    E-Print Network [OSTI]

    W. Saunders

    2008-01-29T23:59:59.000Z

    Cosmic shear offers a remarkbly clean way to measure the equation of state of the Universe and its evolution. Resolution over a wide field is paramount, and Antarctica offers unique possibilities in this respect. There is an order of magnitude gain in speed over temperate sites, or a factor three in surface density. This means that PILOT outperforms much larger telescopes elsewhere, and can compete with the proposed DUNE space mission. Keywords: Antarctic astronomy, Surveys, Adaptive optics, Weak lensing

  11. A possible change in mass balance of Greenland and Antarctic ice sheets in the coming century

    SciTech Connect (OSTI)

    Ohmura, A.; Wild, M. [Swiss Federal Institute of Technology, Zurich (Switzerland)] [Swiss Federal Institute of Technology, Zurich (Switzerland); Bengtsson, L. [Max Planck Institute for Meteorology, Hamburg (Germany)] [Max Planck Institute for Meteorology, Hamburg (Germany)

    1996-09-01T23:59:59.000Z

    A high-resolution GCM is found to simulate precipitation and surface energy balance of high latitudes with high accuracy. This opens new possibilities to investigate the future mass balance of polar glaciers and its effect on sea level. The surface mass balance of the Greenland and the Antarctic ice sheets is simulated using the ECHAM3 GCM with T106 horizontal resolution. With this model, two 5-year integrations for the present and doubled carbon dioxide conditions based on the boundary conditions provided by the ECHAM1/T21 transient to what extent the effect of climate change on the mass balance on the two largest glaciers of the world can differ. On Greenland one sees a slight decrease in accumulation and a substantial increase in melt, while on Antarctica a large increase in accumulation without melt is projected. Translating the mass balances into terms of sea-level equivalent, the Greenland discharge causes a sea level rise of 1.1 mm yr{sup {minus}1}, while the accumulation on Antarctica tends to lower it by 0.9 mm yr{sup {minus}1}. The change in the combined mass balance of the two continents is almost zero. The sea level change of the next century can be affected more effectively by the thermal expansion of seawater and the mass balance of smaller glaciers outside of Greenland and Antarctica. 24 refs., 11 figs., 2 tabs.

  12. Tropical Africa: Land Use, Biomass, and Carbon Estimates for 1980 (NDP-055)

    SciTech Connect (OSTI)

    Brown, S.

    2002-04-16T23:59:59.000Z

    This document describes the contents of a digital database containing maximum potential aboveground biomass, land use, and estimated biomass and carbon data for 1980. The biomass data and carbon estimates are associated with woody vegetation in Tropical Africa. These data were collected to reduce the uncertainty associated with estimating historical releases of carbon from land use change. Tropical Africa is defined here as encompassing 22.7 x 10{sup 6} km{sup 2} of the earth's land surface and is comprised of countries that are located in tropical Africa (Angola, Botswana, Burundi, Cameroon, Cape Verde, Central African Republic, Chad, Congo, Benin, Equatorial Guinea, Ethiopia, Djibouti, Gabon, Gambia, Ghana, Guinea, Ivory Coast, Kenya, Liberia, Madagascar, Malawi, Mali, Mauritania, Mozambique, Namibia, Niger, Nigeria, Guinea-Bissau, Zimbabwe (Rhodesia), Rwanda, Senegal, Sierra Leone, Somalia, Sudan, Tanzania, Togo, Uganda, Burkina Faso (Upper Volta), Zaire, and Zambia). The database was developed using the GRID module in the ARC/INFO{trademark} geographic information system. Source data were obtained from the Food and Agriculture Organization (FAO), the U.S. National Geophysical Data Center, and a limited number of biomass-carbon density case studies. These data were used to derive the maximum potential and actual (ca. 1980) aboveground biomass values at regional and country levels. The land-use data provided were derived from a vegetation map originally produced for the FAO by the International Institute of Vegetation Mapping, Toulouse, France.

  13. HIGH ABUNDANCES OF PRESOLAR SILICATES IN ANTARCTIC MICROMETEORITES; IMPLICATIONS FOR THEIR COMETARY ORIGINS. T. Yada1,2,3

    E-Print Network [OSTI]

    Syowa Station, in East Antarctica [8, 9]. Seven fine-grained AMMs, T98NF2, -H3, -H5, -G6, -G8, TT54B397 silicates in T98H5 (grains 1P1, 4P1 and 15P1), three Group 4 presolar silicates in T98G8 (grains 4P1, 8P1 been revised to be 50 ppm. For three presolar-silicate-bearing AMMs, TT54B397, T98H5, and ­G8

  14. Extreme Science (LBNL Science at the Theater)

    SciTech Connect (OSTI)

    Ajo-Franklin, Caroline; Klein, Spencer; Minor, Andrew; Torok, Tamas

    2012-02-27T23:59:59.000Z

    On Feb. 27, 2012 at the Berkeley Repertory Theatre, four Berkeley Lab scientists presented talks related to extreme science - and what it means to you. Topics include: Neutrino hunting in Antarctica. Learn why Spencer Klein goes to the ends of the Earth to search for these ghostly particles. From Chernobyl to Central Asia, Tamas Torok travels the globe to study microbial diversity in extreme environments. Andrew Minor uses the world's most advanced electron microscopes to explore materials at ultrahigh stresses and in harsh environments. And microbes that talk to computers? Caroline Ajo-Franklin is pioneering cellular-electrical connections that could help transform sunlight into fuel.

  15. Wind energy applications guide

    SciTech Connect (OSTI)

    anon.

    2001-01-01T23:59:59.000Z

    The brochure is an introduction to various wind power applications for locations with underdeveloped transmission systems, from remote water pumping to village electrification. It includes an introductory section on wind energy, including wind power basics and system components and then provides examples of applications, including water pumping, stand-alone systems for home and business, systems for community centers, schools, and health clinics, and examples in the industrial area. There is also a page of contacts, plus two specific example applications for a wind-diesel system for a remote station in Antarctica and one on wind-diesel village electrification in Russia.

  16. Atmospheric CO{sub 2} concentrations the CSIRO (Australia) monitoring program from aircraft 1972 - 1981

    SciTech Connect (OSTI)

    Beardsmore, D.J.; Pearman, G.I. [Commonwealth Scientific Industrial Research Organization (CSIRO), Victoria (Australia). Division of Atmospheric Research

    1984-09-01T23:59:59.000Z

    Atmospheric CO{sub 2} concentrations were measured in the troposphere and lower stratosphere over the Australia-New Zealand region and as far south as Antarctica for the period 1972-1981. The samples were collected from aircraft over a large range of latitudes and altitudes. The sampling program has been based on the cooperation of the Australia Department of Transport, Quantas Airways, Trans Australia Airlines, the United States, New Zealand and Australian Air Forces and occasional chartering of light aircraft for special purposes.

  17. The thermophysics of glaciers

    SciTech Connect (OSTI)

    Zotikov, I.A.

    1986-01-01T23:59:59.000Z

    This volume presents the results of experimental and theoretical work on the thermodynamics of ice sheets and glaciers. The author has carried out extensive field work in both the Soviet Union and Antarctica over the last 25 years and has contributed to the understanding of the thermophysics of glaciers. The topics covered in this volume embrace heat flow measurement and temperature distributions in glaciers, the thermal drilling of glaciers, the melting and freezing of ice sheets, and other thermophysical problems. Also included are topics of relevance to glacial engineering.

  18. Iron Fertilization of the Southern Ocean: Regional Simulation and Analysis of C-Sequestration in the Ross Sea

    SciTech Connect (OSTI)

    Kevin Arrigo

    2012-03-13T23:59:59.000Z

    A modified version of the dynamic 3-dimensional mesoscale Coupled Ice, Atmosphere, and Ocean model (CIAO) of the Ross Sea ecosystem has been used to simulate the impact of environmental perturbations upon primary production and biogenic CO2 uptake. The Ross Sea supports two taxonomically, and spatially distinct phytoplankton populations; the haptophyte Phaeocystis antarctica and diatoms. Nutrient utilization ratios predict that P. antarctica and diatoms will be driven to nitrate and phosphate limitation, respectively. Model and field data have confirmed that the Ross Sea is iron limited with only two-thirds of the macronutrients consumed by the phytoplankton by the end of the growing season. In this study, the CIAO model was improved to simulate a third macronutrient (phosphate), dissolved organic carbon, air-sea gas exchange, and the carbonate system. This enabled us to effectively model pCO2 and subsequently oceanic CO2 uptake via gas exchange, allowing investigations into the affect of alleviating iron limitation on both pCO2 and nutrient drawdown.

  19. Photometric Variability in the CSTAR Field: Results From the 2008 Data Set

    E-Print Network [OSTI]

    Wang, Songhu; Zhou, Xu; Zhou, Ji-Lin; Fu, Jian-Ning; Yang, Ming; Liu, Huigen; Xie, Jiwei; Wang, Lifan; Wang, Lingzhi; Wittenmyer, R A; Ashley, M C B; Feng, Long-Long; Gong, Xuefei; Lawrence, J S; Liu, Qiang; Luong-Van, D M; Ma, Jun; Peng, Xiyan; Storey, J W V; Wu, Zhenyu; Yan, Jun; Yang, Huigen; Yang, Ji; Yuan, Xiangyan; Zhang, Tianmeng; Zhang, Xiaojia; Zhu, Zhenxi; Zou, Hu

    2015-01-01T23:59:59.000Z

    The Chinese Small Telescope ARray (CSTAR) is the first telescope facility built at Dome A, Antarctica. During the 2008 observing season, the installation provided long-baseline and high-cadence photometric observations in the i-band for 18,145 targets within 20 deg2 CSTAR field around the South Celestial Pole for the purpose of monitoring the astronomical observing quality of Dome A and detecting various types of photometric variability. Using sensitive and robust detection methods, we discover 274 potential variables from this data set, 83 of which are new discoveries. We characterize most of them, providing the periods, amplitudes and classes of variability. The catalog of all these variables is presented along with the discussion of their statistical properties.

  20. Observing the Birth of Supermassive Black Holes with the Planned ICECUBE Neutrino Detector

    E-Print Network [OSTI]

    Xiangdong Shi; George Fuller; Francis Halzen

    1998-12-27T23:59:59.000Z

    It has been suggested that the supermassive black holes, at the centers of galaxies and quasars, may initially form in single collapses of relativistic star clusters or supermassive stars built-up during the evolution of dense star clusters. We show that it may be possible for ICECUBE (a planned 1 km^3 neutrino detector in Antarctica) to detect the neutrino bursts associated with those collapses at redshift $z\\la 0.2$ with a rate of $\\sim$ 0.1 to 1 burst per year. Such detections could give new insights into the formation of structure in the universe, especially when correlated with gravitational wave signatures or even gamma-ray bursts.

  1. West antarctic ice sheet collapse: Chimera or clear danger

    SciTech Connect (OSTI)

    Alley, R.B. (Pennsylvania State Univ., University Park, PA (United States)); MacAyeal, D.R. (Univ. of Chicago, IL (United States))

    1993-01-01T23:59:59.000Z

    The specter of a west antarctic collapse has been with us for 25 years. Recently, certain official assessments concerned primarily with the future response to projected global warming have concluded that Antarctica will not cause much sea-level rise within the planning horizon of a century or so. At the same time startling new results on ice sheet (in)stability have been emerging, pointing to less stability then previously believed. Some recent results are reviewed briefly: Heinrich layers in the North Atlantic show basally lubricated surges of the Laurentide ice sheet; the west antarctic ice sheet collapsed recently; the modern west antarctic ice sheet is changing rapidly locally; the bed of ice stream B is exceptionally well lubricated by water and water-saturated soft sediments; the modern ice sheet is thinning slowly on average; a model west antarctic ice sheet undergoes rapid collapses long after forcing and probably related to penetration of warmth to the bed. 23 refs.

  2. Save with Solar Newsletter, Vol. 2, Issue 1, Spring 1999

    SciTech Connect (OSTI)

    Patrina Eiffert.

    1999-05-26T23:59:59.000Z

    Save with Solar is a quarterly bulletin produced under the Department of Energy's Federal Energy Management Program for all those who are planning or working on installations of solar and other renewable energy technologies in the Federal government's facilities. Contents include technical information about today's solar technologies and information about the programs, policies, procurement practices, and incentives that support the deployment of renewable energy in the Federal sector. Among the topics covered in this issue is a two-page article about how solar energy is being used by the National Science Foundation in NSF outposts in Antarctica. The newsletter also describes projects that meet the goals of the President's Million Solar Roofs Initiative.

  3. Save with Solar Newsletter, Vol. 2, Issue 1, Spring 1999

    SciTech Connect (OSTI)

    Eiffert, P.

    1999-05-26T23:59:59.000Z

    ''Save with Solar'' is a quarterly bulletin produced under the Department of Energy's Federal Energy Management Program for all those who are planning or working on installations of solar and other renewable energy technologies in the Federal government's facilities. Contents include technical information about today's solar technologies and information about the programs, policies, procurement practices, and incentives that support the deployment of renewable energy in the Federal sector. Among the topics covered in this issue is a two-page article about how solar energy is being used by the National Science Foundation in NSF outposts in Antarctica. The newsletter also describes projects that meet the goals of the President's Million Solar Roofs Initiative.

  4. Science & Technology Review January/February 2009

    SciTech Connect (OSTI)

    Bearinger, J P

    2008-11-20T23:59:59.000Z

    This month's issue has the following articles: (1) Protecting Our Military Forces--Commentary by John C. Doesburg; (2) Sniffing the Air with an Electronic Nose--A Livermore-designed minuscule sensor could sniff the air to warn of toxic chemicals in manufacturing plants, on city streets, or during battle; (3) Simulations Explain High-Energy-Density Experiments--A 'grand challenge' project on Livermore's Atlas supercomputer reveals the physics of high-energy-density experiments; (4) Seeing Condensed Matter in a New Light--New x-ray diffraction experiments reveal the ultrafast dynamics of a nanoscale solid structure as it evolves over picosecond timescales; and (5) Environment, Safety, and Health in the Extreme--While working in an Antarctica base camp, one Laboratory manager learned important lessons in safety and environmental stewardship.

  5. Science at the Theatre - Extreme Science - Promo Video

    SciTech Connect (OSTI)

    Klein, Spencer

    2012-01-01T23:59:59.000Z

    On Feb. 27 at 7 pm at the Berkeley Repertory Theatre, join four Berkeley Lab scientists as they discuss extreme science -- and what it means to you. Topics include: Neutrino hunting in Antarctica. Learn why Spencer Klein goes to the ends of the Earth to search for these ghostly particles. From Chernobyl to Central Asia, Tamas Torok travels the globe to study microbial diversity in extreme environments. Andrew Minor uses the world's most advanced electron microscopes to explore materials at ultrahigh stresses and in harsh environments. And microbes that talk to computers? Caroline Ajo-Franklin is pioneering cellular-electrical connections that could help transform sunlight into fuel. Go here for more information and to view videos of previous Science at the Theater events: http://www.lbl.gov/LBL-PID/fobl/

  6. Temperature Profiles and the Effect of AGN on Submillimeter Emission from BLAST Observations of Resolved Galaxies

    E-Print Network [OSTI]

    Wiebe, Donald V; Bock, James J; Chapin, Edward L; Devlin, Mark J; Dicker, Simon; Griffin, Matthew; Gundersen, Joshua O; Halpern, Mark; Hargrave, Peter C; Hughes, David H; Klein, Jeff; Marsden, Gaelen; Martin, Peter G; Mauskopf, Philip; Netterfield, Calvin B; Olmi, Luca; Pascale, Enzo; Patanchon, Guillaume; Rex, Marie; Scott, Douglas; Semisch, Christopher; Thomas, Nicholas; Truch, Matthew D P; Tucker, Carole; Tucker, Gregory S; Viero, Marco P

    2009-01-01T23:59:59.000Z

    Over the course of two flights, the Balloon-borne Large Aperture Submillimeter Telescope (BLAST) made resolved maps of seven nearby (BLAST05), BLAST observed a single nearby galaxy, NGC 4565. During the December 2006 flight from Antarctica (BLAST06), BLAST observed the nearby galaxies NGC 1097, NGC 1291, NGC 1365, NGC 1512, NGC 1566, and NGC 1808. We fit physical dust models to a combination of BLAST observations and other available data for the the galaxies with Spitzer data. We fit a modified blackbody to the remaining galaxies to obtain total dust mass and mean dust temperature. For the four galaxies with Spitzer data, we also produce maps and radial profiles of dust column density and temperature. We measure the fraction of BLAST detected flux originating from the central cores of these galaxies and use this to calculate a "core fraction", an upper limit on the "AGN fraction" of submillimeter detected galaxies. Fin...

  7. Science at the Theatre - Extreme Science - Promo Video

    ScienceCinema (OSTI)

    Klein, Spencer

    2013-05-29T23:59:59.000Z

    On Feb. 27 at 7 pm at the Berkeley Repertory Theatre, join four Berkeley Lab scientists as they discuss extreme science -- and what it means to you. Topics include: Neutrino hunting in Antarctica. Learn why Spencer Klein goes to the ends of the Earth to search for these ghostly particles. From Chernobyl to Central Asia, Tamas Torok travels the globe to study microbial diversity in extreme environments. Andrew Minor uses the world's most advanced electron microscopes to explore materials at ultrahigh stresses and in harsh environments. And microbes that talk to computers? Caroline Ajo-Franklin is pioneering cellular-electrical connections that could help transform sunlight into fuel. Go here for more information and to view videos of previous Science at the Theater events: http://www.lbl.gov/LBL-PID/fobl/

  8. Testing of a Stirling cycle cooler

    SciTech Connect (OSTI)

    Chen, F.C.; Keshock, E.G.; Murphy, R.W.

    1988-09-01T23:59:59.000Z

    Stirling cycle coolers have long been used as low temperature refrigeration devices. They are relatively compact, reliable, commercially available, and use helium as the working fluid. The Stirling cycle, in principle, can be used for household refrigeration and heat pumping applications as well. Currently, these applications are almost entirely provided by the vapor compression technology using chlorofluorocarbons (CFCs) as working fluids. It has been known that CFCs cause depletion of the ozone layer that protects the earth against harmful levels of ultraviolet radiation from the sun. A recent report of a ''hole'' in the ozone layer above Antarctica and of possible environmental and health consequences from ozone depletion aroused public attention. The urgent need to reduce the future used of CFCs should instigate investigation of non-CFC alternative technologies. The Stirling cooler technology, which does not use CFCs, could be a viable alternative. A laboratory test of the performance of a Stirling cooler is reported and its implications for household refrigeration are explored. 11 refs., 6 figs., 2 tabs.

  9. Ultraviolet radiation in the southern seas in early spring 1993

    SciTech Connect (OSTI)

    Wendler, G.; Quakenbush, T. [Univ. of Alaska, Fairbanks, AK (United States)

    1994-12-31T23:59:59.000Z

    The National Science Foundation research vessel Nathaniel B. Palmer carried out a cruise to Antarctica in early spring of 1993. It left Punta Arenas, Chile, close to the tip of South America on 11 August 1993. sailed south for 3 days to the tip of The Antarctic Peninsula, stopping at O`Higgens and Palmer Stations, and from there went southwest and into the Bellingshausen sea. On 10 September, it reached the most southerly position, 71{degrees}S, some distance north of the Thurston Island. From there, it went as far as 110{degrees}W before returning to Punta Arenas. The main purpose of the cruise was to investigate the snow- and sea-ice thickness, properties, and structures in this part of the southern oceans. It also allowed us to carry out continuous radiation measurements. We measured the following fluxes: global radiation (Eppley PSP), infrared incoming radiation (Eppley Pyrgeometer PIR), ultraviolet-A radiation (Eppley UV meter), ultraviolet-B radiation (Yankee Environmental Systems), and pitch and roll of the ship (Lucas Sensing Systems, Inc.). All instruments were sampled twice per second (Campbell Scientific, Model 21 X), and a notebook computer (ASI Patriot) stored 1-minute averages of the radiation data and 1-minute standard deviation of the ship`s pitch and roll. Visual observations of cloud cover were also recorded. 2 refs., 3 figs.

  10. The Design and Performance of IceCube DeepCore

    E-Print Network [OSTI]

    The IceCube Collaboration

    2011-09-25T23:59:59.000Z

    The IceCube neutrino observatory in operation at the South Pole, Antarctica, comprises three distinct components: a large buried array for ultrahigh energy neutrino detection, a surface air shower array, and a new buried component called DeepCore. DeepCore was designed to lower the IceCube neutrino energy threshold by over an order of magnitude, to energies as low as about 10 GeV. DeepCore is situated primarily 2100 m below the surface of the icecap at the South Pole, at the bottom center of the existing IceCube array, and began taking physics data in May 2010. Its location takes advantage of the exceptionally clear ice at those depths and allows it to use the surrounding IceCube detector as a highly efficient active veto against the principal background of downward-going muons produced in cosmic-ray air showers. DeepCore has a module density roughly five times higher than that of the standard IceCube array, and uses photomultiplier tubes with a new photocathode featuring a quantum efficiency about 35% higher than standard IceCube PMTs. Taken together, these features of DeepCore will increase IceCube's sensitivity to neutrinos from WIMP dark matter annihilations, atmospheric neutrino oscillations, galactic supernova neutrinos, and point sources of neutrinos in the northern and southern skies. In this paper we describe the design and initial performance of DeepCore.

  11. A subtropical fate awaited freshwater discharged from glacial Lake Agassiz

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

    Condron, Alan; Winsor, Peter

    2011-02-01T23:59:59.000Z

    The 8.2 kyr event is the largest abrupt climatic change recorded in the last 10,000 years, and is widely hypothesized to have been triggered by the release of thousands of kilometers cubed of freshwater into the North Atlantic Ocean. Using a high-resolution (1/6°) global, ocean-ice circulation model we present an alternative view that freshwater discharged from glacial Lake Agassiz would have remained on the continental shelf as a narrow, buoyant, coastal current, and would have been transported south into the subtropical North Atlantic. The pathway we describe is in contrast to the conceptual idea that freshwater from this lake outburstmore »spread over most of the sub-polar North Atlantic, and covered the deep, open-ocean, convection regions. This coastally confined freshwater pathway is consistent with the present-day routing of freshwater from Hudson Bay, as well as paleoceanographic evidence of this event. Using a coarse-resolution (2.6°) version of the same model, we demonstrate that the previously reported spreading of freshwater across the sub-polar North Atlantic results from the inability of numerical models of this resolution to accurately resolve narrow coastal flows, producing instead a diffuse circulation that advects freshwater away from the boundaries. To understand the climatic impact of freshwater released in the past or future (e.g. Greenland and Antarctica), the ocean needs to be modeled at a resolution sufficient to resolve the dynamics of narrow, coastal buoyant flows.« less

  12. A prototype station for ARIANNA: a detector for cosmic neutrinos

    E-Print Network [OSTI]

    Lisa Gerhardt; Spencer R. Klein; Thorsten Stezelberger; Steve Barwick; Kamlesh Dookayka; Jordan Hanson; Ryan Nichol

    2010-05-27T23:59:59.000Z

    The Antarctic Ross Iceshelf Antenna Neutrino Array (ARIANNA) is a proposed detector for ultra-high energy astrophysical neutrinos. It will detect coherent radio Cherenkov emission from the particle showers produced by neutrinos with energies above about 10^17 eV. ARIANNA will be built on the Ross Ice Shelf just off the coast of Antarctica, where it will eventually cover about 900 km^2 in surface area. There, the ice-water interface below the shelf reflects radio waves, giving ARIANNA sensitivity to downward going neutrinos and improving its sensitivity to horizontally incident neutrinos. ARIANNA detector stations will each contain 4-8 antennas which search for brief pulses of 50 MHz to 1 GHz radio emission from neutrino interactions. We describe a prototype station for ARIANNA which was deployed in Moore's Bay on the Ross Ice Shelf in December 2009, discuss the design and deployment, and present some initial figures on performance. The ice shelf thickness was measured to be 572 +/- 6 m at the deployment site.

  13. Polarization dependence of radiowave propagation through Antarctic ice

    E-Print Network [OSTI]

    Dave Z. Besson

    2008-03-30T23:59:59.000Z

    Using a bistatic radar system on the ice surface, we have studied radiofrequency reflections off internal layers in Antarctic ice at the South Pole. In our measurement, the total propagation time of ~ns-duration, vertically broadcast radio signals, as a function of polarization axis in the horizontal plane, provides a direct probe of the geometry-dependence of the ice permittivity to depths of 1--2 km. Previous studies in East Antarctica have interpreted the measured azimuthal dependence of reflected signals as evidence for birefringent-induced interference effects, which are proposed to result from preferred alignment of the crystal orientation fabric (COF) axis. To the extent that COF alignment results from the bulk flow of ice across the Antarctic continent, we would expect a measurable birefringent asymmetry at South Pole, as well. Although we also observe clear dependence of reflected amplitude on polarization angle in our measurements, we do not observe direct evidence for birefringent-induced time-delay effects at the level of 0.1 parts per mille.

  14. Comparative Theoretical Study of the Ring-Opening Polymerization of Caprolactam vs Caprolactone Using QM/MM Methods

    SciTech Connect (OSTI)

    Elsasser, Brigitta M.; Schoenen, Iris; Fels, Gregor

    2013-06-07T23:59:59.000Z

    Candida antarctica lipase B (CALB) efficiently catalyzes the ring-opening polymerization of lactones to high molecular weight products in good yield. In contrast, an efficient enzymatic synthesis of polyamides has so far not been described in the literature. This obvious difference in enzyme catalysis is the subject of our comparative study of the initial steps of a CALB catalyzed ring-opening polymerization of ?- caprolactone and ?-caprolactam. We have applied docking tools to generate the reactant state complex and performed quantum mechanical/molecular mechanical (QM/MM) calculations at the density functional theory (DFT) PBE0 level of theory to simulate the acylation of Ser105 by the lactone and the lactam, respectively, via the corresponding first tetrahedral intermediates. We could identify a decisive difference in the accessibility of the two substrates in the ring-opening to the respective acyl enzyme complex as the attack of ?-caprolactam is hindered because of an energetically disfavored proton transfer during this part of the catalytic reaction while ?-caprolactone is perfectly processed along the widely accepted pathway using the catalytic triade of Ser105, His224, and Asp187. Since the generation of an acylated Ser105 species is the crucial step of the polymerization procedure, our results give an explanation for the unsatisfactory enzymatic polyamide formation and opens up new possibilities for targeted rational catalyst redesign in hope of an experimentally useful CALB catalyzed polyamide synthesis.

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

    SciTech Connect (OSTI)

    Baring-Gould, I.; Corbus, D.

    2007-12-01T23:59:59.000Z

    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.

  16. Advance of East Antarctic outlet glaciers during the Hypsithermal: Implications for the volume state of the Antarctic ice sheet under global warming

    SciTech Connect (OSTI)

    Domack, E.W. (Hamilton College, Clinton, NY (United States)); Jull, A.J.T. (Univ. of Arizona, Tucson (United States)); Nakao, Seizo (Geological Survey of Japan, Ibaraki (Japan))

    1991-11-01T23:59:59.000Z

    The authors present the first circum-East Antarctic chronology for the Holocene, based on 17 radiocarbon dates generated by the accelerator method. Marine sediments form around East Antarctica contain a consistent, high-resolution record of terrigenous (ice-proximal) and biogenic (open-marine) sedimentation during Holocene time. This record demonstrates that biogenic sedimentation beneath the open-marine environment on the continental shelf has been restricted to approximately the past 4 ka, whereas a period of terrigenous sedimentation related to grounding line advance of ice tongues and ice shelves took place between 7 and 4 ka. An earlier period of open-marine (biogenic sedimentation) conditions following the late Pleistocene glacial maximum is recognized from the Prydz Bay (Ocean Drilling Program) record between 10.7 and 7.3 ka. Clearly, the response of outlet systems along the periphery of the East Antarctic ice sheet during the mid-Holocene was expansion. This may have been a direct consequence of climate warming during an Antarctic Hypsithermal. Temperature-accumulation relations for the Antarctic indicate that warming will cause a significant increase in accumulation rather than in ablation. Models that predict a positive mass balance (growth) of the Antarctic ice sheet under global warming are supported by the mid-Holocene data presented herein.

  17. Geoscience laser altimeter system - stellar reference system

    SciTech Connect (OSTI)

    Millar, Pamela S.; Sirota, J. Marcos [NASA Goddard Space Flight Center, Laser Remote Sensing Branch, Code 924, Greenbelt, Maryland, 20771 (United States); University of Maryland at Baltimore County, 5401 Wilkens Ave, Baltimore, Maryland, 21228-5398 (United States)

    1998-01-15T23:59:59.000Z

    GLAS is an EOS space-based laser altimeter being developed to profile the height of the Earth's ice sheets with {approx}15 cm single shot accuracy from space under NASA's Mission to Planet Earth (MTPE). The primary science goal of GLAS is to determine if the ice sheets are increasing or diminishing for climate change modeling. This is achieved by measuring the ice sheet heights over Greenland and Antarctica to 1.5 cm/yr over 100 kmx100 km areas by crossover analysis (Zwally 1994). This measurement performance requires the instrument to determine the pointing of the laser beam to {approx}5 urad (1 arcsecond), 1-sigma, with respect to the inertial reference frame. The GLAS design incorporates a stellar reference system (SRS) to relate the laser beam pointing angle to the star field with this accuracy. This is the first time a spaceborne laser altimeter is measuring pointing to such high accuracy. The design for the stellar reference system combines an attitude determination system (ADS) with a laser reference system (LRS) to meet this requirement. The SRS approach and expected performance are described in this paper.

  18. Reaction of the accumulation zone portions of glaciers to climatic change

    SciTech Connect (OSTI)

    Whillans, I.M.

    1981-05-20T23:59:59.000Z

    The response of the accumulation regions of glaciers to changes in accumulation rate and in surface temperature is calculated by considering perturbations to the ice flow. The analysis is limited to glaciers in whch flow is dominated by internal shear and not by bottom sliding and for which flowliners are geographically paralled. In general, glaciers begin to alter thickness immediately after a change in accumulation rate, but the effect of a change in surface temperature is delayed by the time for this temperature change to penetrate to depth in the glacier. A warming leads to glacial thinning. The amount and timing of the response is very different for different glaciers. Characteristic times are on the order of tens of years for mountain glaciers and ten of thousands of years for the east antarctic ice sheet. As an example, the theory is applied to the ice sheet near Byrd Station, Antarctica. For hypothetical changes in surface accumulation rate and temperature, rates and amounts of thickness change are calculated, and it is found that the measured thinning is probably too fast to have been caused by climatic variation alone. The effects of hypothetical climatic variations on the depth-age and depth-temperature relationships through the ice sheet are also calculated. It is hoped that the theory will prove valuable in the interpreation of future drill hole results.

  19. Glacier calving, dynamics, and sea-level rise. Final report

    SciTech Connect (OSTI)

    Meier, M.F.; Pfeffer, W.T.; Amadei, B.

    1998-08-01T23:59:59.000Z

    The present-day calving flux from Greenland and Antarctica is poorly known, and this accounts for a significant portion of the uncertainty in the current mass balance of these ice sheets. Similarly, the lack of knowledge about the role of calving in glacier dynamics constitutes a major uncertainty in predicting the response of glaciers and ice sheets to changes in climate and thus sea level. Another fundamental problem has to do with incomplete knowledge of glacier areas and volumes, needed for analyses of sea-level change due to changing climate. The authors proposed to develop an improved ability to predict the future contributions of glaciers to sea level by combining work from four research areas: remote sensing observations of calving activity and iceberg flux, numerical modeling of glacier dynamics, theoretical analysis of the calving process, and numerical techniques for modeling flow with large deformations and fracture. These four areas have never been combined into a single research effort on this subject; in particular, calving dynamics have never before been included explicitly in a model of glacier dynamics. A crucial issue that they proposed to address was the general question of how calving dynamics and glacier flow dynamics interact.

  20. Paleoenviromental data from less-investigated polar regions

    SciTech Connect (OSTI)

    Vaikmae, R.

    1992-03-01T23:59:59.000Z

    The Arctic holds extensive records of past climatic and environmental changes. Stable isotope variations in polar ice are in many cases important records of paleoclimatic information. Deep ice cores from Antarctica and Greenland, reaching back through the last glaciation, have provided valuable information about the Earth's climate in the past. This paper discusses the oxygen-18 variations in intermediate-depth ice cores from smaller ice caps of Svalbard, Severnaya Zemlya (North Land) and from the marginal area of the Antarctic ice sheet, covering the time span from 1000 to 8000 years B.P. All profiles studied clearly reflect the main climatic events during this time interval. However, small shifts in time exist between details on different curves. Most probably this is due to certain asynchronity in climatic changes in the various regions. There are extensive areas in the Arctic, especially in its eastern sector, where no glaciers currently exist and, possibly, in some areas never existed in the past either. These are the areas of permafrost where several forms of ice occur Within the ground. The source water for most types of ground ice originates from precipitation, but unlike glacier ice, the range of mechanisms for the formation of ground ice is very large, which considerably complicates the interpretation of their isotopic characteristics. For paleoclimatic and paleopermafrost reconstructions, the isotopic content of polygonal wedge ice seems to be most promising. The attempts to use isotopic records from segregated ice for paleoenvironmental research will also be discussed.

  1. Interpolation of scattered temperature data measurements onto a worldwide regular grid using radial basis functions with applications to global warming

    SciTech Connect (OSTI)

    Kansa, E.J.; Axelrod, M.C.; Kercher, J.R.

    1994-05-01T23:59:59.000Z

    Our current research into the response of natural ecosystems to a hypothesized climatic change requires that we have estimates of various meteorological variables on a regularly spaced grid of points on the surface of the earth. Unfortunately, the bulk of the world`s meteorological measurement stations is located at airports that tend to be concentrated on the coastlines of the world or near populated areas. We can also see that the spatial density of the station locations is extremely non-uniform with the greatest density in the USA, followed by Western Europe. Furthermore, the density of airports is rather sparse in desert regions such as the Sahara, the Arabian, Gobi, and Australian deserts; likewise the density is quite sparse in cold regions such as Antarctica Northern Canada, and interior northern Russia. The Amazon Basin in Brazil has few airports. The frequency of airports is obviously related to the population centers and the degree of industrial development of the country. We address the following problem here. Given values of meteorological variables, such as maximum monthly temperature, measured at the more than 5,500 airport stations, interpolate these values onto a regular grid of terrestrial points spaced by one degree in both latitude and longitude. This is known as the scattered data problem.

  2. A subtropical fate awaited freshwater discharged from glacial Lake Agassiz

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

    Condron, Alan [Univ. of Massachusetts, Amherst, MA (United States). Climate System Research Center, Dept. of Geosciences; Winsor, Peter [Univ. of Alaska, Fairbanks, AK (United States). Inst. of Marine Science, School of Fisheries and Ocean Sciences

    2011-02-01T23:59:59.000Z

    The 8.2 kyr event is the largest abrupt climatic change recorded in the last 10,000 years, and is widely hypothesized to have been triggered by the release of thousands of kilometers cubed of freshwater into the North Atlantic Ocean. Using a high-resolution (1/6°) global, ocean-ice circulation model we present an alternative view that freshwater discharged from glacial Lake Agassiz would have remained on the continental shelf as a narrow, buoyant, coastal current, and would have been transported south into the subtropical North Atlantic. The pathway we describe is in contrast to the conceptual idea that freshwater from this lake outburst spread over most of the sub-polar North Atlantic, and covered the deep, open-ocean, convection regions. This coastally confined freshwater pathway is consistent with the present-day routing of freshwater from Hudson Bay, as well as paleoceanographic evidence of this event. Using a coarse-resolution (2.6°) version of the same model, we demonstrate that the previously reported spreading of freshwater across the sub-polar North Atlantic results from the inability of numerical models of this resolution to accurately resolve narrow coastal flows, producing instead a diffuse circulation that advects freshwater away from the boundaries. To understand the climatic impact of freshwater released in the past or future (e.g. Greenland and Antarctica), the ocean needs to be modeled at a resolution sufficient to resolve the dynamics of narrow, coastal buoyant flows.

  3. A prototype station for ARIANNA: a detector for cosmic neutrinos

    SciTech Connect (OSTI)

    Gerhardt, L.; Klein, S.; Stezelberger, T.; Barwick, S.; Dookayka, K.; Hanson, J.; Nichol, R.

    2010-05-27T23:59:59.000Z

    The Antarctic Ross Iceshelf Antenna Neutrino Array (ARIANNA) is a proposed detector for ultra-high energy astrophysical neutrinos. It will detect coherent radio Cherenkov emission from the particle showers produced by neutrinos with energies above about 1017 eV. ARIANNA will be built on the Ross Ice Shelf just off the coast of Antarctica, where it will eventually cover about 900 km2 in surface area. There, the ice-water interface below the shelf reflects radio waves, giving ARIANNA sensitivity to downward going neutrinos and improving its sensitivity to horizontally incident neutrinos. ARIANNA detector stations will each contain 4-8 antennas which search for brief pulses of 50 MHz to 1 GHz radio emission from neutrino interactions. We describe a prototype station for ARIANNA which was deployed in Moore's Bay on the Ross Ice Shelf in December 2009, discuss the design and deployment, and present some initial figures on performance. The ice shelf thickness was measured to be 572 +- 6 m at the deployment site.

  4. BLAST OBSERVATIONS OF RESOLVED GALAXIES: TEMPERATURE PROFILES AND THE EFFECT OF ACTIVE GALACTIC NUCLEI ON FIR TO SUBMILLIMETER EMISSION

    SciTech Connect (OSTI)

    Wiebe, Donald V.; Chapin, Edward L.; Halpern, Mark; Marsden, Gaelen [Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1 (Canada); Ade, Peter A. R.; Griffin, Matthew; Hargrave, Peter C.; Mauskopf, Philip; Pascale, Enzo [School of Physics and Astronomy, Cardiff University, 5 The Parade, Cardiff, CF24 3AA (United Kingdom); Bock, James J. [Jet Propulsion Laboratory, Pasadena, CA 91109-8099 (United States); Devlin, Mark J.; Dicker, Simon; Klein, Jeff; Rex, Marie [Department of Physics and Astronomy, University of Pennsylvania, 209 South 33rd Street, Philadelphia, PA 19104 (United States); Gundersen, Joshua O. [Department of Physics, University of Miami, 1320 Campo Sano Drive, Coral Gables, FL 33146 (United States); Hughes, David H. [Instituto Nacional de AstrofIsica Optica y Electronica, Aptdo. Postal 51 y 216, 72000 Puebla (Mexico); Martin, Peter G. [Canadian Institute for Theoretical Astrophysics, University of Toronto, 60 St. George Street, Toronto, ON M5S 3H8 (Canada); Netterfield, Calvin B. [Department of Physics, University of Toronto, 60 St. George Street, Toronto, ON M5S 1A7 (Canada); Olmi, Luca [Istituto di Radioastronomia, Largo E. Fermi 5, I-50125, Firenze (Italy); Patanchon, Guillaume [Laboratoire APC, 10, rue Alice Domon et Leonie Duquet 75205 Paris (France)

    2009-12-20T23:59:59.000Z

    Over the course of two flights, the Balloon-borne Large Aperture Submillimeter Telescope (BLAST) made resolved maps of seven nearby (<25 Mpc) galaxies at 250, 350, and 500 mum. During its 2005 June flight from Sweden, BLAST observed a single nearby galaxy, NGC 4565. During the 2006 December flight from Antarctica, BLAST observed the nearby galaxies NGC 1097, NGC 1291, NGC 1365, NGC 1512, NGC 1566, and NGC 1808. We fit physical dust models to a combination of BLAST observations and other available data for the galaxies observed by Spitzer. We fit a modified blackbody to the remaining galaxies to obtain total dust mass and mean dust temperature. For the four galaxies with Spitzer data, we also produce maps and radial profiles of dust column density and temperature. We measure the fraction of BLAST detected flux originating from the central cores of these galaxies and use this to calculate a 'core fraction', an upper limit on the 'active galactic nucleus fraction' of these galaxies. We also find our resolved observations of these galaxies give a dust mass estimate 5-19 times larger than an unresolved observation would predict. Finally, we are able to use these data to derive a value for the dust mass absorption coefficient of kappa = 0.29 +- 0.03 m{sup 2} kg{sup -1} at 250 mum. This study is an introduction to future higher-resolution and higher-sensitivity studies to be conducted by Herschel and SCUBA-2.

  5. Estimating present climate in a warming world: a model-based approach

    SciTech Connect (OSTI)

    Raeisaenen, J.; Ruokolainen, L. [University of Helsinki (Finland). Division of Atmospheric Sciences and Geophysics

    2008-09-30T23:59:59.000Z

    Weather services base their operational definitions of 'present' climate on past observations, using a 30-year normal period such as 1961-1990 or 1971-2000. In a world with ongoing global warming, however, past data give a biased estimate of the actual present-day climate. Here we propose to correct this bias with a 'delta change' method, in which model-simulated climate changes and observed global mean temperature changes are used to extrapolate past observations forward in time, to make them representative of present or future climate conditions. In a hindcast test for the years 1991-2002, the method works well for temperature, with a clear improvement in verification statistics compared to the case in which the hindcast is formed directly from the observations for 1961-1990. However, no improvement is found for precipitation, for which the signal-to-noise ratio between expected anthropogenic changes and interannual variability is much lower than for temperature. An application of the method to the present (around the year 2007) climate suggests that, as a geographical average over land areas excluding Antarctica, 8-9 months per year and 8-9 years per decade can be expected to be warmer than the median for 1971-2000. Along with the overall warming, a substantial increase in the frequency of warm extremes at the expense of cold extremes of monthly-to-annual temperature is expected.

  6. The tectonic development of south-central Asia and the paleogeographic setting of its hydrocarbon resources

    SciTech Connect (OSTI)

    Scotese, C.R. (Shell Development Co., Houston, TX (USA)); Tyrell, W.W. Jr. (Amoco Production Co., Houston, TX (USA)); Maher, K.A. (Shell Development Co., Houston, TX (USA))

    1990-05-01T23:59:59.000Z

    The countries of south-central Asia (Afghanistan to Thailand) are made up of fragments of Gondwana that collided with the southern margin of Eurasia during the Mesozoic and Cenozoic. The Cimmerian terranes (Turkey, Iran, Afghanistan, Qiang Tang, and Burma-Malaya) rifted away from Gondwana beginning in the Late Carboniferous and were accreted to Asia during the Late Triassic-Jurassic. The Lhasa terrane, presumably also derived from Gondwana, was accreted during the Late Jurassic. By the Early Cretaceous, India-Madagascar had separated from Africa and from Australia-Antarctica. In the middle Cretaceous, India rapidly rifted away from Madagascar, and during the early Eocene collided with Asia giving rise to the Tibetam Plateau and the mountain belts from Afghanistan through Burma. The sedimentary basins and petroleum provinces adjacent to and south of these collision zones are best understood when viewed in the context of their tectonic history and paleogeographic setting. About 7 billion bbl of oil and 50 tcf of gas have been discovered in south-central Asia, mostly in Cenozoic deltaic sandstones or marine carbonate reservoirs in rift (Cambay), passive margin (Bombay shelf), and foreland basins (Assam, Indux, Potwar, Bengal) in India, Pakistan, and Bangladesh, and in a fore-arc setting in Burma. Source rocks are mostly Paleogene shale, but some Paleozoic and Mesozoic sources be present in Pakistan. New exploration is underway or will begin soon in India, Bangladesh, Nepal, and Burma.

  7. Beryllium-10 in the Taylor Dome ice core: Applications to Antarctic glaciology and paleoclimatology

    SciTech Connect (OSTI)

    Steig, E.J.

    1996-12-31T23:59:59.000Z

    An ice core was drilled at Taylor dome, East Antarctica, reaching to bedrock at 554 meters. Oxygen-isotope measurements reveal climatic fluctuations through the last interglacial period. To facilitate comparison of the Taylor Dome paleoclimate record with geologic data and results from other deep ice cores, several glaciological issues need to be addressed. In particular, accumulation data are necessary as input for numerical ice-flow-models, for determining the flux of chemical constituents from measured concentrations, and for calculation of the offset in age between ice and trapped air in the core. The analysis of cosmogenic beryllium-10 provides a geochemical method for constraining the accumulation-rate history at Taylor Dome. High-resolution measurements were made in shallow firn cores and snow pits to determine the relationship among beryllium-10 concentrations, wet and dry deposition mechanisms, and snow-accumulation rates. Comparison between theoretical and measured variations in deposition over the last 75 years constrains the relationship between beryllium-10 deposition and global average production rates. The results indicate that variations in geomagnetically-modulated production-rate do not strongly influence beryllium-10 deposition at Taylor Dome. Although solar modulation of production rate is important for time scales of years to centuries, snow-accumulation rate is the dominant control on ice-core beryllium-10 concentrations for longer periods. Results show that the Taylor Dome core can be used to provide new constraints on regional climate over the last 130,000 years, complementing the terrestrial and marine geological record from the Dry Valley, Transantarctic Mountains and western Ross Sea.

  8. Polar versus temperate grounding-line sedimentary systems and marine glacier stability during sea level rise by global warming

    SciTech Connect (OSTI)

    Powell, R.D. (Illinois Univ., DeKalb, IL (United States). Geology Dept.); Pyne, A.R. (Victoria Univ., Wellington (New Zealand). Antarctic Research Center); Hunter, L.E.; Rynes, N.R.

    1992-01-01T23:59:59.000Z

    Marine-ending glaciers may retreat with global warming as sea level rises by ocean thermal expansion. If the sea floor rises by sediment accumulation, then glaciers may not feel the effect of sea level rise. A submersible ROV and other techniques have been used to collect data from temperate and polar glaciers to compare sediment production and mass balance of their grounding-line systems. Temperature Alaskan valley glaciers flow at about 0.2--2 km/a and have high volumes of supraglacial, englacial and subglacial debris. However, most sediment contributed to the base of their tidewater cliffs comes from subglacial streams or squeezing out subglacial sediment and pushing it with other marine sediment into a morainal bank. Blue Glacier, a thin, locally fed polar glacier in Antarctica, flows slowly and has minimal glacial debris. The grounding-line system at the tidewater cliff is a morainal bank that forms solely by pushing of marine sediment. An Antarctic polar outlet glacier, Mackay Glacier, terminating as a floating glacier-tongue, has similar volumes of basal debris to Alaskan temperature glaciers and flows at 250 m/a. However, no subglacial streams issued from Mackay's grounding line and all sedimentation was by rockfall and grainfall rainout from seawater undermelt of the tongue. A grounding-line wedge of glacimarine diamicton is deposited over subglacial (lodgement ) till. Although Antarctic grounding-line accumulation rates are three orders of magnitude smaller than Alaskan rates, both are capable of compensating for predicted rises in sea level by thermal heating from global warming.

  9. Aerosol remote sensing in polar regions

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

    Tomasi, C.; Wagener, R.; Kokhanovsky, A. A.; Lupi, A.; Ritter, C.; Smirnov, A.; O Neill, N. T.; Stone, R. S.; Holben, B. N.; Nyeki, S.; Wehrli, C.; Stohl, A.; Mazzola, M.; Lanconelli, C.; Vitale, V.; Stebel, K.; Aaltonen, V.; de Leeuw, G.; Rodriguez, E.; Herber, A. B.; Radionov, V. F.; Zielinski, T.; Petelski, T.; Sakerin, S. M.; Kabanov, D. M.; Xue, Y.; Mei, L.; Istomina, L.; Wagener, R.; McArthur, B.; Sobolewski, P. S.; Kivi, R.; Courcoux, Y.; Larouche, P.; Broccardo, S.; Piketh, S. J.

    2015-01-01T23:59:59.000Z

    Multi-year sets of ground-based sun-photometer measurements conducted at 12 Arctic sites and 9 Antarctic sites were examined to determine daily mean values of aerosol optical thickness ?(?) at visible and near-infrared wavelengths, from which best-fit values of Ångström's exponent ? were calculated. Analysing these data, the monthly mean values of ?(0.50 ?m) and ? and the relative frequency histograms of the daily mean values of both parameters were determined for winter–spring and summer–autumn in the Arctic and for austral summer in Antarctica. The Arctic and Antarctic covariance plots of the seasonal median values of ? versus ?(0.50 ?m) showed: (i) a considerable increase in ?(0.50 ?m) for the Arctic aerosol from summer to winter–spring, without marked changes in ?; and (ii) a marked increase in ?(0.50 ?m) passing from the Antarctic Plateau to coastal sites, whereas ? decreased considerably due to the larger fraction of sea-salt aerosol. Good agreement was found when comparing ground-based sun-photometer measurements of ?(?) and ? at Arctic and Antarctic coastal sites with Microtops measurements conducted during numerous AERONET/MAN cruises from 2006 to 2013 in three Arctic Ocean sectors and in coastal and off-shore regions of the Southern Atlantic, Pacific, and Indian Oceans, and the Antarctic Peninsula. Lidar measurements were also examined to characterise vertical profiles of the aerosol backscattering coefficient measured throughout the year at Ny-Ålesund. Satellite-based MODIS, MISR, and AATSR retrievals of ?(?) over large parts of the oceanic polar regions during spring and summer were in close agreement with ship-borne and coastal ground-based sun-photometer measurements. An overview of the chemical composition of mode particles is also presented, based on in-situ measurements at Arctic and Antarctic sites. Fourteen log-normal aerosol number size-distributions were defined to represent the average features of nuclei, accumulation and coarse mode particles for Arctic haze, summer background aerosol, Asian dust and boreal forest fire smoke, and for various background austral summer aerosol types at coastal and high-altitude Antarctic sites. The main columnar aerosol optical characteristics were determined for all 14 particle modes, based on in-situ measurements of the scattering and absorption coefficients. Diurnally averaged direct aerosol-induced radiative forcing and efficiency were calculated for a set of multimodal aerosol extinction models, using various Bidirectional Reflectance Distribution Function models over vegetation-covered, oceanic and snow-covered surfaces. These gave a reliable measure of the pronounced effects of aerosols on the radiation balance of the surface–atmosphere system over polar regions.

  10. Aerosol remote sensing in polar regions

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

    Tomasi, C.; Wagener, R.; Kokhanovsky, A. A.; Lupi, A.; Ritter, C.; Smirnov, A.; O Neill, N. T.; Stone, R. S.; Holben, B. N.; Nyeki, S.; et al

    2015-01-01T23:59:59.000Z

    Multi-year sets of ground-based sun-photometer measurements conducted at 12 Arctic sites and 9 Antarctic sites were examined to determine daily mean values of aerosol optical thickness ?(?) at visible and near-infrared wavelengths, from which best-fit values of Ångström's exponent ? were calculated. Analysing these data, the monthly mean values of ?(0.50 ?m) and ? and the relative frequency histograms of the daily mean values of both parameters were determined for winter–spring and summer–autumn in the Arctic and for austral summer in Antarctica. The Arctic and Antarctic covariance plots of the seasonal median values of ? versus ?(0.50 ?m) showed: (i)more »a considerable increase in ?(0.50 ?m) for the Arctic aerosol from summer to winter–spring, without marked changes in ?; and (ii) a marked increase in ?(0.50 ?m) passing from the Antarctic Plateau to coastal sites, whereas ? decreased considerably due to the larger fraction of sea-salt aerosol. Good agreement was found when comparing ground-based sun-photometer measurements of ?(?) and ? at Arctic and Antarctic coastal sites with Microtops measurements conducted during numerous AERONET/MAN cruises from 2006 to 2013 in three Arctic Ocean sectors and in coastal and off-shore regions of the Southern Atlantic, Pacific, and Indian Oceans, and the Antarctic Peninsula. Lidar measurements were also examined to characterise vertical profiles of the aerosol backscattering coefficient measured throughout the year at Ny-Ålesund. Satellite-based MODIS, MISR, and AATSR retrievals of ?(?) over large parts of the oceanic polar regions during spring and summer were in close agreement with ship-borne and coastal ground-based sun-photometer measurements. An overview of the chemical composition of mode particles is also presented, based on in-situ measurements at Arctic and Antarctic sites. Fourteen log-normal aerosol number size-distributions were defined to represent the average features of nuclei, accumulation and coarse mode particles for Arctic haze, summer background aerosol, Asian dust and boreal forest fire smoke, and for various background austral summer aerosol types at coastal and high-altitude Antarctic sites. The main columnar aerosol optical characteristics were determined for all 14 particle modes, based on in-situ measurements of the scattering and absorption coefficients. Diurnally averaged direct aerosol-induced radiative forcing and efficiency were calculated for a set of multimodal aerosol extinction models, using various Bidirectional Reflectance Distribution Function models over vegetation-covered, oceanic and snow-covered surfaces. These gave a reliable measure of the pronounced effects of aerosols on the radiation balance of the surface–atmosphere system over polar regions.« less

  11. A Geochemical and Sedimentary Record of High Southern Latitude Holocene Climate Evolution from Lago Fagnano, Tierra del Fuego

    SciTech Connect (OSTI)

    Moy, C M; Dunbar, R B; Guilderson, T P; Waldmann, N; Mucciarone, D A; Recasens, C; Austin, J A; Anselmetti, F S

    2010-11-19T23:59:59.000Z

    Situated at the southern margin of the hemispheric westerly wind belt and immediately north of the Antarctic Polar Frontal zone, Tierra del Fuego is well-positioned to monitor coupled changes in the ocean-atmosphere system of the high southern latitudes. Here we describe a Holocene paleoclimate record from sediment cores obtained from Lago Fagnano, a large lake in southern Tierra del Fuego at 55{sup o}S, to investigate past changes in climate related to these two important features of the global climate system. We use an AMS radiocarbon chronology for the last 8,000 years based on pollen concentrates, thereby avoiding contamination from bedrock-derived lignite. Our chronology is consistent with a tephrochronologic age date for deposits from the middle Holocene Volcan Hudson eruption. Combining bulk organic isotopic ({delta}{sup 13}C and {delta}{sup 15}N) and elemental (C and N) parameters with physical sediment properties allow us to better understand sediment provenance and transport mechanisms and to interpret Holocene climate and tectonic change during the last 8,000 years. Co-variability and long-term trends in C/N ratio, carbon accumulation rate, and magnetic susceptibility reflect an overall Holocene increase in the delivery of terrestrial organic and lithogenic material to the deep eastern basin. We attribute this variability to westerly wind-derived precipitation. Increased wind strength and precipitation in the late Holocene drives the Nothofagus forest eastward and enhances run-off and terrigenous inputs to the lake. Superimposed on the long-term trend are a series of abrupt 9 negative departures in C/N ratio, which constrain the presence of seismically-driven mass flow events in the record. We identify an increase in bulk {delta}{sup 13}C between 7,000 and 5,000 cal yr BP that we attribute to enhanced aquatic productivity driven by warmer summer temperatures. The Lago Fagnano {delta}{sup 13}C record shows similarities with Holocene records of sea surface temperature from the mid-latitude Chilean continental shelf and Antarctic air temperatures from the Taylor Dome ice core record in East Antarctica. Mid-Holocene warming occurred simultaneously across the Antarctic Frontal Zone, and in particular, in locations currently influenced by the Antarctic Circumpolar Current.