Sample records for greenland ice sheet

  1. Complex systems influence melting of Greenland ice sheet

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

    Complex systems influence melting of Greenland ice sheet Complex systems influence melting of Greenland ice sheet International research team's field work shows that, well, things...

  2. Coherent radar ice thickness measurements over the Greenland ice sheet

    E-Print Network [OSTI]

    Gogineni, S. Prasad; Tammana, Dilip; Braaten, David A.; Leuschen, C.; Legarsky, J.; Kanagaratnam, P.; Stiles, J.; Allen, C.; Jezek, K.; Akins, T.

    2001-12-27T23:59:59.000Z

    We developed two 150-MHz coherent radar depth sounders for ice thickness measurements over the Greenland ice sheet. We developed one of these using connectorized components and the other using radio frequency integrated circuits (RFICs). Both...

  3. 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

  4. Azimuth Variation in Microwave Backscatter over the Greenland Ice Sheet

    E-Print Network [OSTI]

    Long, David G.

    Azimuth Variation in Microwave Backscatter over the Greenland Ice Sheet Ivan S. Ashcraft and David backscatter measurements are becoming an important tool for monitoring the dynamic behavior of the Greenland ice sheet. However, most Greenland studies assume constant backscatter for varying azimuth angles

  5. Greenland Ice Sheet Retreat Since the Little Ice Age

    E-Print Network [OSTI]

    Beitch, Marci Jillian

    2014-01-01T23:59:59.000Z

    and I. Willis (2012), Greenland's shrinking ice cover: "fastfluctuations in southeast Greenland, Nat. Geosci. , 5(6),T. Decker (2011), Analysis of Greenland marine- terminating

  6. Ice sheets

    E-Print Network [OSTI]

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

    2007-01-01T23:59:59.000Z

    is eroding West Antarctic Ice Sheet. Geophysical Researchand Yungel, J. (2000). Greenland Ice Sheet: High-Elevation2004). The west Antarctic ice sheet and long term climate

  7. white paper, 9 March 2009 An ice core to reconstruct Greenland ice sheet mass balance

    E-Print Network [OSTI]

    Box, Jason E.

    white paper, 9 March 2009 1 An ice core to reconstruct Greenland a handful of years suggest a profound Greenland ice sheet mass balance sensitivity (2000) found that the Greenland ice sheet lost as much as 2/3 its current

  8. Hydrological and biogeochemical cycling along the Greenland ice sheet margin

    E-Print Network [OSTI]

    Bhatia, Maya Pilar, 1979-

    2012-01-01T23:59:59.000Z

    Global warming has led to a significant increase in Greenland ice sheet (GrIS) melt and runoff since 1990, resulting in escalated export of fresh water and associated sediment to the surrounding North Atlantic and Arctic ...

  9. Home Atmosphere Sea Ice Ocean Land Greenland Biology Greenland Ice Sheet Mass Balance

    E-Print Network [OSTI]

    Box, Jason E.

    , thinning and breakup of Jakobshavn Glacier's (SW Greenland) floating ice tongue and acceleration-to-year variability in GrIS mass turnover, e.g. sudden glacier accelerations (Rignot and Kanagartnam 2006). Since or 2005. Physical response mechanisms, such as hydraulic acceleration of the ice sheet from continued

  10. Determining Greenland Ice Sheet sensitivity to regional climate change: one-way coupling of a 3-D thermo-mechanical ice sheet model with a mesoscale climate model

    E-Print Network [OSTI]

    Schlegel, Nicole-Jeanne

    2011-01-01T23:59:59.000Z

    in running RCM’s over Greenland to produce high-qualityoutlet glaciers. For Greenland, this detail is specificallyCurrently, no coupled Greenland Ice Sheet model experiment

  11. Update of Greenland Ice Sheet Mass Loss: Exponential? 26 December 2012

    E-Print Network [OSTI]

    Hansen, James E.

    1 Update of Greenland Ice Sheet Mass Loss: Exponential? 26 December 2012 James Hansen and Makiko Sato Shepherd et al. (2012) provide an update of the mass loss by the Greenland ice sheet (and at the data seems warranted. A crucial question is how rapidly the Greenland (or Antarctic) ice sheet can

  12. Greenland Ice Sheet Surface Air Temperature Variability: 18402007* JASON E. BOX

    E-Print Network [OSTI]

    Howat, Ian M.

    Greenland Ice Sheet Surface Air Temperature Variability: 1840­2007* JASON E. BOX Byrd Polar, seasonal, and annual mean Greenland ice sheet near- surface air temperatures. Independent observations Greenland in autumn and southern Greenland in winter. Spring trends marked the 1920s warming onset, while

  13. Impact of Greenland and Antarctic ice sheet interactions on climate sensitivity

    E-Print Network [OSTI]

    Goelzer, Heiko

    Impact of Greenland and Antarctic ice sheet interactions on climate sensitivity H. Goelzer · P versions including interactive Greenland and Ant- arctic ice sheet models and model versions with fixed ice a few global climate models exist that include dynami- cally coupled models for the Greenland (e

  14. Multi-Annual Changes in Microwave Backscatter over the Greenland Ice Sheet

    E-Print Network [OSTI]

    Long, David G.

    Multi-Annual Changes in Microwave Backscatter over the Greenland Ice Sheet Ivan S. Ashcraft in the location of key ice facies/zones on the Greenland ice sheet are considered key indicators of global climate the SIR al- gorithm to produce u" images, the meiisurements made by these sensors over Greenland

  15. Ocean Challenge, Vol.19, Autumn 2012 Early Online The shrinking Greenland ice Sheet

    E-Print Network [OSTI]

    Johnson, Helen

    Ocean Challenge, Vol.19, Autumn 2012 Early Online The shrinking Greenland ice Sheet The Greenland and south-east- ern Greenland. Higher ocean temperatures are thought to have played a role. However, the circulation within Greenland's fjords is not well known, and the interaction between glacial ice and the ocean

  16. Relating Microwave Backscatter Azimuth Modulation to Surface Properties of the Greenland Ice Sheet

    E-Print Network [OSTI]

    Long, David G.

    Relating Microwave Backscatter Azimuth Modulation to Surface Properties of the Greenland Ice Sheet modulation of the normalized radar cross- section in satellite data sets over Greenland is investigated. Data sastrugi are estimated. I. INTRODUCTION The Greenland ice sheet is a critical area of study in esti- mating

  17. Earliest Holocene south Greenland ice sheet retreat within its late Holocene extent

    E-Print Network [OSTI]

    Earliest Holocene south Greenland ice sheet retreat within its late Holocene extent Anders E, British Columbia, Canada Abstract Early Holocene summer warmth drove dramatic Greenland ice sheet (GIS Greenland, significantly earlier than previous estimates, and 6.8 ± 0.1 ka to 7.9 ± 0.1 ka in southwest

  18. Radar Measurements of Ice Sheet Thickness of Outlet Glaciers in Greenland D. Braaten+

    E-Print Network [OSTI]

    Kansas, University of

    Radar Measurements of Ice Sheet Thickness of Outlet Glaciers in Greenland D. Braaten+ and S of Kansas Lawrence, KS 66045 U.S.A. Abstract ­ We have conducted airborne measurements over the Greenland the mass balance of the Greenland ice sheet, the University of Kansas has been operating an airborne radio

  19. Remote sensing of Greenland ice sheet using multispectral near-infrared and visible radiances

    E-Print Network [OSTI]

    Dozier, Jeff

    Remote sensing of Greenland ice sheet using multispectral near-infrared and visible radiances Petr microwave methods. The method should be useful for long-term monitoring of the melt area of the Greenland of MODIS retrievals of the western portion of the Greenland ice sheet over the period 2000 to 2006

  20. Geoid displacement about Greenland resulting from past and present-day mass changes in the Greenland Ice Sheet

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Geoid displacement about Greenland resulting from past and present- day mass changes in the Greenland Ice Sheet K. Fleming, Z. Martinec, and J. Hagedoorn Geodesy and Remote Sensing, Geo-isostatic adjustment (GIA) following the Last Glacial Maximum and from present- day mass changes in the Greenland Ice

  1. Analysis of the Greenland ice sheet loss from remote sensing data*

    E-Print Network [OSTI]

    Analysis of the Greenland ice sheet loss from remote sensing data* Peter Limkilde Svendsen, Allan corresponding to the missing data removed. 2950 730.5 365.25 183 122 50 40 30 20 0 0.05 0.1 0.15 Greenland frequency content, amplitude spectrum Period [d] Amplitude[m] Greenland mean Greenland maximum Figure 1: EWH

  2. Net accumulation of the Greenland ice sheet: High resolution modeling of climate changes

    E-Print Network [OSTI]

    Born, Andreas

    : Kiilsholm, S., J. H. Christensen, K. Dethloff, and A. Rinke, Net accumulation of the Greenland ice sheetNet accumulation of the Greenland ice sheet: High resolution modeling of climate changes Sissi, Denmark Klaus Dethloff and Annette Rinke Alfred Wegener Institute for Polar and Marine Research

  3. Response of the Greenland and Antarctic Ice Sheets to Multi-Millennial Greenhouse Warming in the Earth

    E-Print Network [OSTI]

    Goelzer, Heiko

    Response of the Greenland and Antarctic Ice Sheets to Multi-Millennial Greenhouse Warming of the Greenland and Antarctic ice sheets to sustained multi-millennial greenhouse warming. Use was made of fully polar regions. This leads to an almost complete disintegration of the Greenland ice sheet after 3

  4. Acceleration of the Greenland ice sheet mass loss as observed by GRACE: Confidence and sensitivity

    E-Print Network [OSTI]

    Acceleration of the Greenland ice sheet mass loss as observed by GRACE: Confidence and sensitivity: Greenland mass loss acceleration confidence intervals GRACE a b s t r a c t We examine the scale and spatial distribution of the mass change acceleration in Greenland and its statistical significance, using processed

  5. A spatially calibrated model of annual accumulation rate on the Greenland Ice Sheet (19582007)

    E-Print Network [OSTI]

    Howat, Ian M.

    on the Greenland Ice Sheet (1958­2007) Evan W. Burgess,1 Richard R. Forster,1 Jason E. Box,2,3 Ellen Mosley 10 September 2009; accepted 21 October 2009; published 10 April 2010. [1] Past estimates of Greenland patterns, which are modeled via spatial interpolation of root mean squared errors. Mean 1958­2007 Greenland

  6. 07/06/2009 Melting Ice Could Lead to Massive Waves of Climate Refugees Treehugger 06/30/2009 MELTING GREENLAND ICE SHEETS MAY THREATEN

    E-Print Network [OSTI]

    Hu, Aixue

    /30/2009 MELTING GREENLAND ICE SHEETS MAY THREATEN NORTHEAST U.S., CANADA Federal News Service 06/30/2009 Sea raises spectre of displaced humanity peopleandplanet.net 06/16/2009 Melting Greenland Ice Sheets May Report - Online 06/02/2009 Melting Greenland Ice Sheets May Threaten Northeast, Canada usagnet 06

  7. Probabilistic calibration of a Greenland Ice Sheet model using spatially-resolved synthetic observations: toward projections of ice mass loss with uncertainties

    E-Print Network [OSTI]

    Haran, Murali

    1 Probabilistic calibration of a Greenland Ice Sheet model using spatially-resolved synthetic on how well the model reproduces the Greenland Ice Sheet profile. We improve on the previous state et al., 2012). Here, we focus on the Greenland Ice Sheet component of future sea level rise

  8. Modelling Lake Volumes and Runoff on the Western Greenland Ice Sheet 

    E-Print Network [OSTI]

    Lund, Sarah

    Supra-glacial lakes can act as a key regulator of variable surface meltwater to the ice-bed interface on the Greenland Ice Sheet. In light of recent numerical studies focussing on the impact of variable surface meltwater inputs to ice sheet dynamics...

  9. Decay of the Greenland Ice Sheet due to surface-meltwater-induced acceleration of basal sliding

    E-Print Network [OSTI]

    Greve, Ralf

    2009-01-01T23:59:59.000Z

    Simulations of the Greenland Ice Sheet are carried out with a high-resolution version of the ice-sheet model SICOPOLIS for several global-warming scenarios for the period 1990-2350. In particular, the impact of surface-meltwater-induced acceleration of basal sliding on the stability of the ice sheet is investigated. A parameterization for the acceleration effect is developed for which modelled and measured mass losses of the ice sheet in the early 21st century agree well. The main findings of the simulations are: (i) the ice sheet is generally very susceptible to global warming on time-scales of centuries, (ii) surface-meltwater-induced acceleration of basal sliding leads to a pronounced speed-up of ice streams and outlet glaciers, and (iii) this ice-dynamical effect accelerates the decay of the Greenland Ice Sheet as a whole significantly, but not catastrophically, in the 21st century and beyond.

  10. Effect of the potential melting of the Greenland Ice Sheet on the Meridional Overturning Circulation and global climate in the future

    E-Print Network [OSTI]

    Han, Weiqing

    Effect of the potential melting of the Greenland Ice Sheet on the Meridional Overturning February 2011 Keywords: Atlantic Meridional Overturning Circulation Sea level Greenland Ice Sheet Global of the Greenland Ice Sheet since the mid-1990s. This increased ice sheet mass loss might be an evidence of global

  11. Did changes in the Subpolar North Atlantic trigger the recent mass loss from the Greenland Ice Sheet?

    E-Print Network [OSTI]

    Straneo, Fiamma

    Did changes in the Subpolar North Atlantic trigger the recent mass loss from the Greenland Ice) Leigh A. Stearns (University of Kansas) The Greenland Ice Sheet's (GIS) contribution to sea level rise and nearly-simultaneous acceleration of several outlet glaciers in Greenland's western and southeastern

  12. Modelling the hydrology of the Greenland ice sheet 

    E-Print Network [OSTI]

    Karatay, Mehmet Rahmi

    2011-06-28T23:59:59.000Z

    This thesis aims to better understand the relationships between basal water pressure, friction, and sliding mechanisms at ice sheet scales. In particular, it develops a new subglacial hydrology model (Hydro) to explicitly ...

  13. High-Resolution Monitoring of Internal Layers Over the Greenland Ice Sheet P. Kanagaratnam, S.P. Gogineni

    E-Print Network [OSTI]

    Kansas, University of

    High-Resolution Monitoring of Internal Layers Over the Greenland Ice Sheet P. Kanagaratnam, S ice plays an important role in the rise of the Earth's sea level. A key variable in assessing the mass balance of an ice sheet is accumulation rate, which is currently determined from ice cores and pits

  14. Evolution of supra-glacial lakes across the Greenland Ice Sheet 

    E-Print Network [OSTI]

    Sundal, Aud

    2008-12-05T23:59:59.000Z

    We used 268 cloud-free Moderate-resolution Imaging Spectroradiometer (MODIS) images spanning the melt seasons 2003 and 2005-2007 to study the seasonal evolution of supra-glacial lakes in three different regions of the Greenland ice sheet. Lake area...

  15. A meteorological experiment in the melting zone of the Greenland ice sheet

    SciTech Connect (OSTI)

    Oerlemans, J. (Utrecht Univ. (Netherlands)); Vugts, H.F. (Free Univ. of Amsterdam (Netherlands))

    1993-03-01T23:59:59.000Z

    Preliminary results are described from a glaciometeorological experiment carried out in the margin (melting zone) of the Greenland ice sheet in the summers of 1990 and 1991. This work was initiated within the framework of a Dutch research program on land ice and sea level change. Seven meteostations were operated along a transect running from the tundra well onto the ice sheet. At the ice edge, humidity, temperature, and wind profiles were obtained with a tethered balloon. On the ice sheet, 90 km from the edge, a boundary-layer research unit, including a sound detecting and ranging system (SODAR) and a radio acoustic sounding system (RASS), was established. Although focusing on the relation between surface energy balance, glacier mass balance, and ice flow, the experiment has also delivered a unique dataset on the dynamics of the atmospheric boundary layer around the warm tundra-cold ice sheet transition. Unexpected behavior was found for the surface albedo during the melt season. Lowest values are not found close to the ice edge, which is usual for glaciers, but higher on the ice sheet. Meltwater accumulation due to inefficient surface drainage was found to be the cause for this. The wind regime is dominated by katabatic flow from the ice sheet. The katabatic layer is typically 100-200 m thick. Close to the ice edge, the flow exhibits a very regular daily rhythm, with maximum wind speed in the afternoon. Farther on the ice sheet, the regime changes, and wind speed reaches maximum values in late night/early morning.

  16. Focused synthetic aperture radar processing of ice-sounder data collected over the Greenland ice sheet

    E-Print Network [OSTI]

    Legarsky, J.; Gogineni, Sivaprasad; Akins, T. L.

    2001-10-01T23:59:59.000Z

    We developed a synthetic aperture radar (SAR) processing algorithm for airborne/spaceborne ice-sounding radar systems and applied it to data collected in Greenland. By using focused SAR (phase-corrected coherent averaging), we improved along...

  17. Using ice cores from the East Antarctic Ice Sheet, scientists have been able to study

    E-Print Network [OSTI]

    Using ice cores from the East Antarctic Ice Sheet, scientists have been able to study ice's ice sheets. Ice sheets are huge areas of permanent ice. There are only three ice sheets on Earth: the Greenland Ice Sheet, the West Antarctic Ice Sheet, and the East Antarctic Ice Sheet. The Greenland Ice Sheet

  18. 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.

  19. Spread of ice mass loss into northwest Greenland observed by GRACE and GPS

    E-Print Network [OSTI]

    Khan, Shfaqat Abbas; Wahr, John; Bevis, Michael; Velicogna, Isabella; Kendrick, Eric

    2010-01-01T23:59:59.000Z

    oscillations and seasonal ice mass fluctuations, Eos Trans.2007), Rapid changes in ice discharge from Greenland outletW. et al. (2004), Greenland Ice Sheet: Increased coastal

  20. Evaluation of the MODIS (MOD10A1) daily snow albedo product over the Greenland ice sheet

    E-Print Network [OSTI]

    Box, Jason E.

    Evaluation of the MODIS (MOD10A1) daily snow albedo product over the Greenland ice sheet Julienne C Abstract This study evaluates the performance of the beta-test MODIS (MOD10A1) daily albedo product using with the launch of the first Landsat. Since then, a wide range of optical-wavelength sensors have been launched

  1. Acceleration of the contribution of the Greenland and Antarctic ice sheets to sea level rise

    E-Print Network [OSTI]

    Rignot, E.; Velicogna, I.; van den Broeke, M. R; Monaghan, A.; Lenaerts, J. T. M

    2011-01-01T23:59:59.000Z

    make a large sea?level rise contribu- tion, Geophys. Res.and Antarctic ice sheets to sea level rise E. Rignot, 1,2 I.ice sheets to sea level rise, Geophys. Res. Lett. , 38,

  2. Runoff simulations from the Greenland ice sheet at Kangerlussuaq from 2006-2007 to 2007/08. West Greenland

    SciTech Connect (OSTI)

    Mernild, Sebastian Haugard [Los Alamos National Laboratory; Hasholt, Bent [UNIV OF COPENHAGEN; Van Den Broeke, Michiel [UTRECHT UNIV; Liston, Glen [COLORADO STATE UNIV

    2009-01-01T23:59:59.000Z

    This study focuses on runoff from a large sector of the Greenland Ice Sheet (GrIS) - the Kangerlussuaq drainage area, West Greenland - for the runoff observation period 2006/07 to 2007/08. SnowModel, a state-of-the-art snow-evolution modeling system, was used to simulate winter accumulation and summer ablation processes, including runoff. Independent in situ end-of-winter snow depth and high-resolution runoff observations were used for validation of simulated accumulation and ablation processes. Runoff was modeled on both daily and hourly time steps, filling a data gap of runoff exiting part of the GrIS. Using hourly meteorological driving data instead of smoothed daily-averaged data produced more realistic meteorological conditions in relation to snow and melt threshold surface processes, and produced 6-17% higher annual cumulative runoff. The simulated runoff series yielded useful insights into the present conditions of inter-seasonal and inter-annual variability of Kangerlussuaq runoff, and provided an acceptable degree of agreement between simulated and observed runoff. The simulated spatial runoff distributions, in some areas of the GrIS terminus, were as high as 2,750 mm w.eq. of runoff for 2006/07, while only 900 mm w.eq was simulated for 2007/08. The simulated total runoff from Kangerlussuaq was 1.9 km{sup 3} for 2006/07 and 1.2 km{sup 3} for 2007/08, indicating a reduction of 35-40% caused by the climate conditions and changes in the GrIS freshwater storage. The reduction in runoff from 2006/07 to 2007/08 occurred simultaneously with the reduction in the overall pattern of satellite-derived GrIS surface melt from 2007 to 2008.

  3. Determining Greenland Ice Sheet sensitivity to regional climate change: one-way coupling of a 3-D thermo-mechanical ice sheet model with a mesoscale climate model

    E-Print Network [OSTI]

    Schlegel, Nicole-Jeanne

    2011-01-01T23:59:59.000Z

    Jakobshavn I. Rinks Observed Historic Flux (km 3 ice/year)I. Rinks * Outlets fed by the Northeast Greenland Ice StreamRinks, measured in 2000). Figure 3.1: Steady-state (A) topography (m) and (C) ice

  4. Determining Greenland Ice Sheet sensitivity to regional climate change: one-way coupling of a 3-D thermo-mechanical ice sheet model with a mesoscale climate model

    E-Print Network [OSTI]

    Schlegel, Nicole-Jeanne

    2011-01-01T23:59:59.000Z

    ice sheet model with a mesoscale climate model By Nicole-ice sheet model with a mesoscale climate model Copyrightice sheet model with a mesoscale climate model by Nicole-

  5. Increased Runoff from Melt from the Greenland Ice Sheet: A Response to Global Warming

    E-Print Network [OSTI]

    Huybrechts, Philippe

    conditions over the ablation zone of the ice sheet, which caused a record melt extent. The year 2006 mass balance changes of the GrIS. Airborne and satellite laser-altimetry data analyses were used

  6. Greenland ice sheet surface mass-balance modeling in a 131-year perspective, 1950-2080

    SciTech Connect (OSTI)

    Mernild, Sebastian Haugard [Los Alamos National Laboratory; Liston, Glen [COLORADO STATE UNIV.; Hiemstra, Christopher [COLORADO STATE UNIV.; Christensen, Jens [DANISH METEOROLOGICAL INS.

    2009-01-01T23:59:59.000Z

    Fluctuations in the Greenland Ice Sheet (GrIS) surface mass-balance (SMB) and freshwater influx to the surrounding oceans closely follow climate fluctuations and are of considerable importance to the global eustatic sea level rise. SnowModel, a state-of-the-art snow-evolution modeling system, was used to simulate variations in the GrIS melt extent, surface water balance components, changes in SMB, and freshwater influx to the ocean. The simulations are based on the IPCC scenario AlB modeled by the HIRHAM4 RCM (using boundary conditions from ECHAM5 AOGCM) from 1950 through 2080. In-situ meteorological station (GC-Net and WMO DMI) observations from inside and outside the GrIS were used to validate and correct RCM output data before it was used as input for SnowModel. Satellite observations and independent SMB studies were used to validate the SnowModel output and confirm the model's robustness. We simulated a {approx}90% increase in end-of-summer surface melt extent (0.483 x 10{sup 6} km{sup 2}) from 1950 to 2080, and a melt index (above 2,000-m elevation) increase of 138% (1.96 x 10{sup 6} km{sup 2} x days). The greatest difference in melt extent occured in the southern part of the GrIS, and the greatest changes in the number of melt days was seen in the eastern part of the GrIS ({approx}50-70%) and was lowest in the west ({approx}20-30%). The rate of SMB loss, largely tied to changes in ablation processes, lead to an enhanced average loss of 331 km{sup 3} from 1950 to 2080, an average 5MB level of -99 km{sup 3} for the period 2070-2080. GrIS surface freshwater runoff yielded an eustatic rise in sea level from 0.8 {+-} 0.1 (1950-1959) to 1.9 {+-} 0.1 mm (2070-2080) sea level equivalent (SLE) y{sup -1}. The accumulated GrIS freshwater runoff contribution from surface melting equaled 160 mm SLE from 1950 through 2080.

  7. Elastic uplift in southeast Greenland due to rapid ice mass loss Shfaqat A. Khan,1

    E-Print Network [OSTI]

    Larson, Kristine

    Elastic uplift in southeast Greenland due to rapid ice mass loss Shfaqat A. Khan,1 John Wahr,2] The rapid unloading of ice from the southeastern sector of the Greenland ice sheet between 2001 and 2006), Elastic uplift in southeast Greenland due to rapid ice mass loss, Geophys. Res. Lett., 34, L21701, doi:10

  8. Climate-driven interannual ice mass evolution in Greenland I. Bergmanna

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Climate-driven interannual ice mass evolution in Greenland I. Bergmanna , G. Ramillienb , FUniversit´e de Toulouse, UPS, OMP, GET, Toulouse, France Abstract We re-evaluate the Greenland mass balance of the Greenland Ice Sheet (GrIS), especially the recent deceleration of ice loss in 2009-2010, once seasonal

  9. Sandia National Laboratories: Ice-Sheet Simulation Code Matures...

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

    Research & Capabilities Ice-flow velocity magnitude myr on the surface of the Greenland Ice Sheet, as computed by the AlbanyFELIX finite element code. Ice-flow velocity...

  10. MODIS snow albedo bias at high solar zenith angles relative to theory and to in situ observations in Greenland

    E-Print Network [OSTI]

    Wang, Xianwei; Zender, Charles S

    2010-01-01T23:59:59.000Z

    glacial lakes across the Greenland Ice Sheet. Remote Sensing2000. Online article: Greenland climate network (GC- Net)characteristics on the Greenland Ice Sheet using MODIS and

  11. 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

  12. Greenland temperature, climate change, and human society during the last 11,600 years

    E-Print Network [OSTI]

    Kobashi, Takuro

    2007-01-01T23:59:59.000Z

    temperatures directly from the Greenland Ice Sheet. Science2006. The 8.2ka event from Greenland ice cores. QuaternaryJouzel, Isotope calibrated Greenland temperature record over

  13. Increasing runoff and sediment load from the Greenland ice sheet at kangerlussuaq (Sonder Stromfjord) in a 30-year perspective, 1979-2008

    SciTech Connect (OSTI)

    Mernild, Sebastian Haugard [Los Alamos National Laboratory; Liston, Glen [COLORADO STATE UNIV.; Hasholt, Bent [UNIV OF COPENGAGEN; Steffen, Konrad [UNIV OF COLORADO; Van Den Broeke, Michiel [UTRECHT UNIV; Mcgrath, Daniel [UNIV OF COLORADO; Yde, Jacob [UNIV OF AARHUS

    2009-01-01T23:59:59.000Z

    This observation and modeling study provides insights into runoff and sediment load exiting the Watson River drainage basin, Kangerlussuaq, West Greenland during a 30 year period (1978/79-2007/08) when the climate experienced increasing temperatures and precipitation. The 30-year simulations quantify the terrestrial freshwater and sediment output from part of the Greenland Ice Sheet (GrIS) and the land between the GrIS and the ocean, in the context of global warming and increasing GrIS surface melt. We used a snow-evolution modeling system (SnowModel) to simulate the winter accumulation and summer ablation processes, including runoff and surface mass balance (SMB), of the Greenland ice sheet. Observed sediment concentrations were related to observed runoff, producing a sediment-load time series. To a large extent, the SMB fluctuations could be explained by changes in net precipitation (precipitation minus evaporation and sublimation), with 8 out of 30 years having negative SMB, mainly because of relatively low annual net precipitation. The overall trend in net precipitation and runoff increased significantly, while 5MB increased insignificantly throughout the simulation period, leading to enhanced precipitation of 0.59 km{sup 3} w.eq. (or 60%), runoff of 0.43 km{sup 3} w.eq (or 54%), and SMB of 0.16 km3 w.eq. (or 86%). Runoff rose on average from 0.80 km{sup 3} w.eq. in 1978/79 to 1.23 km{sup 3} w.eq. in 2007/08. The percentage of catchment oudet runoff explained by runoff from the GrIS decreased on average {approx} 10%, indicating that catchment runoff throughout the simulation period was influenced more by precipitation and snowmelt events, and less by runoff from the GrIS. Average variations in the increasing Kangerlussuaq runoff from 1978/79 through 2007/08 seem to follow the overall variations in satellite-derived GrIS surface melt, where 64% of the variations in simulated runoff were explained by regional melt conditions on the GrIS. Throughout the simulation period, the sediment load varied from a minimum of 0.96 x 10{sup 6} t y{sup -1} in 1991/92 to a maximum of 3.52 x 10{sup 6} t y{sup -1} in 2006/07, showing an average increase of sediment load of 9.42 x 10{sup 5} t (or 72%) throughout the period.

  14. A new bed elevation dataset for Greenland

    E-Print Network [OSTI]

    2013-01-01T23:59:59.000Z

    and bed data set for the Greenland ice sheet 1. Measure-bed elevation dataset for Greenland J. L. Bamber 1 , J. A.face mass balance of the Greenland ice sheet revealed by

  15. North and northeast Greenland ice discharge from satellite radar interferometry

    SciTech Connect (OSTI)

    Rignot, E.J. [California Institute of Technology, Pasadena, CA (United States)] [California Institute of Technology, Pasadena, CA (United States); Gogineni, S.P. [Univ. of Kansas, Lawrence, KS (United States)] [Univ. of Kansas, Lawrence, KS (United States); Krabill, W.B. [NASA Goddard Space Flight Center, Wallops Island, VA (United States)] [and others] [NASA Goddard Space Flight Center, Wallops Island, VA (United States); and others

    1997-05-09T23:59:59.000Z

    Ice discharge from north and northeast Greenland calculated from satellite radar interferometry data of 14 outlet glaciers is 3.5 times that estimated from iceberg production. The satellite estimates, obtained at the grounding line of the outlet glaciers, differ from those obtained at the glacier front, because basal melting is extensive at the underside of the floating glacier sections. The results suggest that the north and northeast parts of the Greenland ice sheet may be thinning and contributing positively to sea-level rise. 24 refs., 3 figs., 1 tab.

  16. Satellite investigations of ice dynamics and supraglacial lake development in Greenland 

    E-Print Network [OSTI]

    Briggs, Kate Hannah

    2012-06-25T23:59:59.000Z

    This thesis aims to improve the current understanding of the processes which control the flow variability of Greenland Ice Sheet (GrIS) outlet glaciers. The most recent Intergovernmental Governmental Panel on Climate ...

  17. Received 26 Aug 2013 | Accepted 22 Apr 2014 | Published 21 May 2014 Ice sheets as a significant source of highly

    E-Print Network [OSTI]

    Benning, Liane G.

    , but are rarely considered as active components of the global iron cycle. The ocean waters around both ice sheets, Katherine Lee1 & Jon Telling1 The Greenland and Antarctic Ice Sheets cover B10% of global land surface concentrations in subglacial runoff from a large Greenland Ice Sheet catchment reveal the potential for globally

  18. Global ice sheet modeling

    SciTech Connect (OSTI)

    Hughes, T.J.; Fastook, J.L. [Univ. of Maine, Orono, ME (United States). Institute for Quaternary Studies

    1994-05-01T23:59:59.000Z

    The University of Maine conducted this study for Pacific Northwest Laboratory (PNL) as part of a global climate modeling task for site characterization of the potential nuclear waste respository site at Yucca Mountain, NV. The purpose of the study was to develop a global ice sheet dynamics model that will forecast the three-dimensional configuration of global ice sheets for specific climate change scenarios. The objective of the third (final) year of the work was to produce ice sheet data for glaciation scenarios covering the next 100,000 years. This was accomplished using both the map-plane and flowband solutions of our time-dependent, finite-element gridpoint model. The theory and equations used to develop the ice sheet models are presented. Three future scenarios were simulated by the model and results are discussed.

  19. Elastic uplift in southeast Greenland due to rapid ice mass loss

    E-Print Network [OSTI]

    Khan, Shfaqat A.; Wahr, John; Stearns, Leigh; Hamilton, Gordon; van Dam, Tonie; Larson, Kristine M.; Francis, Olivier

    2007-11-01T23:59:59.000Z

    [1] The rapid unloading of ice from the southeastern sector of the Greenland ice sheet between 2001 and 2006 caused an elastic uplift of ?35 mm at a GPS site in Kulusuk. Most of the uplift results from ice dynamic-induced volume losses on two nearby...

  20. The Melting of Greenland William H. Lipscomb

    E-Print Network [OSTI]

    Born, Andreas

    ). AnAn ice capice cap is a mass of glacier ice smaller than 50,000 kmis a mass of glacier ice smaller is negligibleSurface melting is negligible Antarctic ice thicknessAntarctic ice thickness (British Antarctic of the Greenland iceMuch of the Greenland ice sheet may have meltedsheet may have melted Greenland minimum extent

  1. Improvement of radar ice-thickness measurements of Greenland outlet glaciers using SAR processing

    E-Print Network [OSTI]

    Braaten, David A.; Gogineni, S. Prasad; Tammana, Dilip; Namburi, Saikiran; Paden, John; Gurumoorthy, Krishna K.

    2002-01-01T23:59:59.000Z

    Extensive aircraft-based radar ice-thickness measurements over the interior and outlet-glacier regions of the Greenland ice sheet have been obtained by the University of Kansas since 1993, with the latest airborne surveys conducted in May 2001...

  2. Constraining MODIS snow albedo at large solar zenith angles: Implications for the surface energy budget in Greenland

    E-Print Network [OSTI]

    Wang, Xianwei; Zender, Charles S

    2010-01-01T23:59:59.000Z

    surface albedo of the Greenland ice sheet: satellite-derivedand J. Box. 2001. Surface climatology of the Greenland IceSheet: Greenland climate net- work 1995-1999. J. Geophys.

  3. Holocene sea-ice variations in Greenland: onshore evidence

    E-Print Network [OSTI]

    Ingólfsson, Ólafur

    Holocene sea-ice variations in Greenland: onshore evidence Ole Bennike* (Geological Survey of Denmark and Greenland, Øster Voldgade 10, DK-1350 Copenhagen K, Denmark) Received 12 August 2002; revised manuscript accepted 2 April 2003 Abstract: The oldest dated driftwood log from northern Greenland is c. 9300

  4. Feasibility of reconstructing paleoatmospheric records of selected alkanes, methyl halides, and sulfur gases from Greenland ice cores

    E-Print Network [OSTI]

    Aydin, M.; Williams, M. B; Saltzman, E. S

    2007-01-01T23:59:59.000Z

    firn and ice at Summit, Greenland, J. Geophys. Res. , 98,AL. : TRACE GASES IN GREENLAND ICE CORE ¨ . Andreae Kettle,and sulfur gases from Greenland ice cores M. Aydin, 1 M. B.

  5. 2, 879921, 2006 Ice-sheet evolution

    E-Print Network [OSTI]

    Boyer, Edmond

    CPD 2, 879­921, 2006 Ice-sheet evolution during the last climatic cycle S. Charbit et al. Title reconstructions of the Northern Hemisphere ice sheets through the last glacial-interglacial cycle S. Charbit1 , C­921, 2006 Ice-sheet evolution during the last climatic cycle S. Charbit et al. Title Page Abstract

  6. Home Atmosphere Sea Ice Ocean Land Greenland Biology , L.-S. Bai

    E-Print Network [OSTI]

    Box, Jason E.

    Home Atmosphere Sea Ice Ocean Land Greenland Biology Greenland J. E. Box 1 , L.-S. Bai 1 , R across the southern half of Greenland led to substantially higher west coast sea ice thickness and concentration. Even so, record-setting summer temperatures around Greenland, combined with an intense melt

  7. A tentative reconstruction of the last interglacial and glacial inception in Greenland based on new gas measurements in the Greenland Ice

    E-Print Network [OSTI]

    Chappellaz, Jérôme

    A tentative reconstruction of the last interglacial and glacial inception in Greenland based on new gas measurements in the Greenland Ice Core Project (GRIP) ice core Amaelle Landais,1 Je September 2003. [1] The disturbed stratigraphy of the ice in the lowest 10% of the Greenland GRIP ice core

  8. Greenland snow accumulation estimates from satellite radar scatterometer data

    E-Print Network [OSTI]

    Long, David G.

    Greenland snow accumulation estimates from satellite radar scatterometer data Mark R. Drinkwater accumulation on the Greenland ice sheet. Microwave radar backscatter images of Greenland are derived using (or decrease) in net snow accumulation on the polar ice caps. The net mass balance of the Greenland

  9. Interannual variability of Arctic sea ice export into the East Greenland Current

    E-Print Network [OSTI]

    Rohling, Eelco

    Interannual variability of Arctic sea ice export into the East Greenland Current K. A. Cox,1 J. D cycle, Arctic sea ice decline, and increasing Greenland glacial melt. Here we use new d18 O data from the East Greenland Current system at Cape Farewell and Denmark Strait to determine the relative proportions

  10. A 600-year annual 10 Be record from the NGRIP ice core, Greenland

    E-Print Network [OSTI]

    Wehrli, Bernhard

    A 600-year annual 10 Be record from the NGRIP ice core, Greenland A.-M. Berggren,1 J. Beer,2 G only one record (Dye-3, Greenland) providing annual resolution over several centuries. Here we report the NGRIP site in Greenland. NGRIP and Dye-3 10 Be exhibits similar long-term variability, although

  11. GREENLAND INLAND ICE MELT-OFF: ANALYSIS OF GLOBAL GRAVITY DATA FROM THE GRACE SATELLITES

    E-Print Network [OSTI]

    GREENLAND INLAND ICE MELT-OFF: ANALYSIS OF GLOBAL GRAVITY DATA FROM THE GRACE SATELLITES Allan A) in meters starting at 29 July 2002 and ending at 25 August 2010. Results focussing on Greenland show indications of a transition taking place in the mass loss in Greenland from mid-2004 to early 2006. Index

  12. Ice-front variation and tidewater behavior on Helheim and Kangerdlugssuaq Glaciers, Greenland

    E-Print Network [OSTI]

    Tsai, Victor C.

    Ice-front variation and tidewater behavior on Helheim and Kangerdlugssuaq Glaciers, Greenland Ian Glaciers, Greenland, from 2001 to 2006, a period in which they retreated and sped up. These data show and retreat in less than a century indicates that tidewater glaciers in Greenland can advance rapidly

  13. A New Coherent Radar for Ice Sounding in Greenland A. Moussessian

    E-Print Network [OSTI]

    Kansas, University of

    A New Coherent Radar for Ice Sounding in Greenland A. Moussessian 1 , R.L. Jordan 1 , E. Rodriguez of this radar on board a P-3 aircraft took place in May of 1999 over Greenland with successful results blanking. The first deployment of this radar took place in May of 1999 in Greenland. During this deployment

  14. NOTES AND CORRESPONDENCE Surface Melting over Ice Shelves and Ice Sheets as Assessed from Modeled

    E-Print Network [OSTI]

    Meissner, Katrin Juliane

    NOTES AND CORRESPONDENCE Surface Melting over Ice Shelves and Ice Sheets as Assessed from Modeled of ice shelves and their progenitor ice sheets. To explore the magnitude of surface melt occurring over modern ice shelves and ice sheets in a climate scenario forced by anthropogenic emissions of carbon

  15. EnvironmentThe MIT Press 2011 The Fate of Greenland

    E-Print Network [OSTI]

    Jackson, Daniel

    EnvironmentThe MIT Press 2011 #12;NEW The Fate of Greenland Lessons from Abrupt Climate Change above, Greenland offers an endless vista of whiteness interrupted only by scattered ponds of azure-colored melt water. Ninety percent of Greenland is covered by ice; its ice sheet, the largest outside

  16. Advanced Review Greenland climate change: from

    E-Print Network [OSTI]

    Bhatt, Uma

    Advanced Review Greenland climate change: from the past to the future Val´erie Masson-Delmotte,1 cores in and around Greenland allow us to place the current trends in regional climate, ice sheet lake sediments in southern Greenland document major environmental and climatic conditions during

  17. IDENTIFYING ICE HYDROMETEOR SIGNATURES ABOVE SUMMIT, GREENLAND USING A MULTI-INSTRUMENT APPROACH

    E-Print Network [OSTI]

    Wisconsin at Madison, University of

    IDENTIFYING ICE HYDROMETEOR SIGNATURES ABOVE SUMMIT, GREENLAND USING A MULTI. These retrievals, however, may be adversely affected by ice hydrometeors commonly observed in mixed phase clouds. Research on the effect of ice hydrometeors on the microwave signal is insufficient. We establish that ice

  18. Neglecting ice-atmosphere interactions underestimates ice sheet melt in millennial-scale deglaciation simulations

    E-Print Network [OSTI]

    Pritchard, M. S.; Bush, A. B.; Marshall, S. J.

    2008-01-01T23:59:59.000Z

    Laurentide and Innutian ice sheets during the Last Glacialclimate of the laurentide ice sheet at the LGM, J. Clim. ,1958), The flow law of ice: A discussion of the assumptions

  19. The ice sheet model The polythermal ice sheet

    E-Print Network [OSTI]

    Calov, Reinhard

    with a temperature at the pressure melting point, the latter being considered as a bi- nary mixture of ice and small a year. Sediment Sliding The sliding velocity over sediment reads which applies if the basal ice Hudson Bay and Hudson Strait has become temperate (see Figure 4d,e), fast basal sliding appears leading

  20. Feasibility of reconstructing paleoatmospheric records of selected alkanes, methyl halides, and sulfur gases from Greenland ice cores

    E-Print Network [OSTI]

    Saltzman, Eric

    , and sulfur gases from Greenland ice cores M. Aydin,1 M. B. Williams,1 and E. S. Saltzman1 Received 7-lived atmospheric trace gases were measured in 25 ice core samples from Summit, Greenland. Samples were selected. The CH3Br results are consistent with previous observations of ``excess'' CH3Br in Greenland firn air

  1. 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

  2. Microstructure through an ice sheet Tobias Binder1, a

    E-Print Network [OSTI]

    Garbe, Christoph S.

    Microstructure through an ice sheet Tobias Binder1, a , Ilka Weikusat2, b , Johannes Freitag2, c.Garbe@iwr.uni-heidelberg.de, e Dietmar.Wagenbach@iup.uni-heidelberg.de, f Sepp.Kipfstuhl@awi.de Keywords: Ice, microstructure characterization, grain boundary curvature, image processing Abstract. Ice cores through an ice sheet can

  3. greenland Field seminar The integrating experience of the IGErT traineeship is

    E-Print Network [OSTI]

    Lotko, William

    greenland Field seminar The integrating experience of the IGErT traineeship is the Greenland Field processes on the Greenland ice sheet at Summit Camp, and environmental policy and science communication in Nuuk, the capital of Greenland. The Dartmouth IGErT is administered by the Institute of arctic Studies

  4. SeaWinds views Greenland Ivan S. Ashcraft and David G. Long

    E-Print Network [OSTI]

    Long, David G.

    SeaWinds views Greenland Ivan S. Ashcraft and David G. Long Brigham Young University, MERS facies in Greenland. The duration of the summer melt over the Greenland ice sheet is calculated using backscatter images of Greenland are produced to investigate diurnal varia- tions in backscatter measurements

  5. alloys sheet processed: Topics by E-print Network

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

    DiscussionPaper|DiscussionPaper| Abstract The influence of a reduced Greenland ice sheet (GrIS) on Greenland's surface climate during the Eemian interglacial is studied using a...

  6. Greenland Observed at High Resolution by the Seasat Scatterometer

    E-Print Network [OSTI]

    Long, David G.

    Greenland Observed at High Resolution by the Seasat Scatterometer D.G. Long', P.J. Hardin2, and RA to SASS data for the study of Greenland's ice sheet. We present a time series of the radar backscatter images over Greenland covering the time period July-September 1978. The images provide an island

  7. 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.

  8. ICE SHEET SOURCES OF SEA LEVEL RISE AND FRESHWATER DISCHARGE

    E-Print Network [OSTI]

    Carlson, Anders

    ICE SHEET SOURCES OF SEA LEVEL RISE AND FRESHWATER DISCHARGE DURING THE LAST DEGLACIATION Anders E the sources of sea level rise and freshwater dis- charge to the global oceans associated with retreat of ice­10 m sea level rise at 19.0­19.5 ka, sourced largely from Northern Hemisphere ice sheet retreat

  9. Ice Thickness Measurements of the Southwest Greenland 2000-m Contour Line J. J. Legarsky, S.P. Gogineni, P. Kanagaratnam, T. L. Akins and Y. C. Wong

    E-Print Network [OSTI]

    Kansas, University of

    Ice Thickness Measurements of the Southwest Greenland 2000-m Contour Line J. J. Legarsky, S Laborato~ performed ice thickness measurements along several flights in the southern part of Greenland. We of the Greenland. INTRODUCTION Since 1993, we have been performing radar ice thickness measurements as a part

  10. Modeling the evolution of polar ice sheets: Ice sheet system model workshop; Bergen, Norway, 2-4 June 2014

    E-Print Network [OSTI]

    Larour, E; Schlegel, N; Morlighem, M

    2014-01-01T23:59:59.000Z

    Model Workshop; Bergen, Norway, 2?4 June 2014 The Ice SheetUniversity of Bergen in Norway, in June 2014. This is the

  11. Coupled models and parallel simulations for three-dimensional full-Stokes ice sheet modeling

    SciTech Connect (OSTI)

    Zhang, Huai [Graduate University of Chinese Academy of Sciences; Ju, Lili [University of South Carolina; Gunzburger, Max [Florida State University; Ringler, Todd [Los Alamos National Laboratory; Price, Stephen [Los Alamos National Laboratory

    2011-01-01T23:59:59.000Z

    A three-dimensional full-Stokes computational model is considered for determining the dynamics, temperature, and thickness of ice sheets. The governing thermomechanical equations consist of the three-dimensional full-Stokes system with nonlinear rheology for the momentum, an advective-diffusion energy equation for temperature evolution, and a mass conservation equation for icethickness changes. Here, we discuss the variable resolution meshes, the finite element discretizations, and the parallel algorithms employed by the model components. The solvers are integrated through a well-designed coupler for the exchange of parametric data between components. The discretization utilizes high-quality, variable-resolution centroidal Voronoi Delaunay triangulation meshing and existing parallel solvers. We demonstrate the gridding technology, discretization schemes, and the efficiency and scalability of the parallel solvers through computational experiments using both simplified geometries arising from benchmark test problems and a realistic Greenland ice sheet geometry.

  12. Past Accumulation Rates of the Western Antarctic Ice Sheet Near an Ice Divide 

    E-Print Network [OSTI]

    Child, Sarah

    2009-08-12T23:59:59.000Z

    The study of accumulation rates of ice is a direct link to the evolution of ice sheet. It is believed by scientists that ice sheet evolution will aid in the mystery of climate change and may lead to predictions about climates in the future...

  13. 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

  14. Levoglucosan as a specific marker of fire events in Greenland snow

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Levoglucosan as a specific marker of fire events in Greenland snow By NATALIE KEHRWALD1 *, ROBERTA collected from a 3 m snow pit at Summit, Greenland (72820?N, 38845?W; 3270 m a.s.l.), with a known, through their eastward transport and deposition on the Greenland ice sheet, and their eventual burial

  15. Response of a marineterminating Greenland outlet glacier to abrupt cooling 8200 and 9300 years ago

    E-Print Network [OSTI]

    Briner, Jason P.

    Response of a marineterminating Greenland outlet glacier to abrupt cooling 8200 and 9300 years ago 16 December 2011. [1] Longterm records of Greenland outletglacier change extending beyond the satellite era can inform future predictions of Greenland Ice Sheet behavior. Of particular relevance

  16. The deglaciation and neoglaciation of Upernavik Isstrm, Greenland Jason P. Briner a,

    E-Print Network [OSTI]

    Briner, Jason P.

    The deglaciation and neoglaciation of Upernavik Isstrøm, Greenland Jason P. Briner a, , Lena Geological Survey of Denmark and Greenland, Øster Voldgade 10, 1350 Copenhagen-K, Denmark c Department 2013 Available online 21 October 2013 Keywords: Greenland Ice Sheet Upernavik Isstrøm Holocene

  17. High variability of Greenland surface temperature over the past 4000 years estimated from trapped air

    E-Print Network [OSTI]

    Severinghaus, Jeffrey P.

    High variability of Greenland surface temperature over the past 4000 years estimated from trapped 10 October 2011; accepted 11 October 2011; published 10 November 2011. [1] Greenland recently is impacting the Greenland ice sheet and in turn accelerating global sealevel rise. Yet, it remains imprecisely

  18. Increasing Temporal Resolution in Greenland Ablation Estimation Using Passive and Active Microwave Data

    E-Print Network [OSTI]

    Long, David G.

    Increasing Temporal Resolution in Greenland Ablation Estimation Using Passive and Active Microwave of these measurements provides an increased understanding of the diurnal melt cycle over Greenland and estimation of the melt profile. I. INTRODUCTION Accurate estimation of the mass balance of the Greenland ice sheet

  19. Modeling the Fracture of Ice Sheets on Parallel Computers

    SciTech Connect (OSTI)

    Waisman, Haim [Columbia University] [Columbia University; Tuminaro, Ray [Sandia National Labs] [Sandia National Labs

    2013-10-10T23:59:59.000Z

    The objective of this project was to investigate the complex fracture of ice and understand its role within larger ice sheet simulations and global climate change. This objective was achieved by developing novel physics based models for ice, novel numerical tools to enable the modeling of the physics and by collaboration with the ice community experts. At the present time, ice fracture is not explicitly considered within ice sheet models due in part to large computational costs associated with the accurate modeling of this complex phenomena. However, fracture not only plays an extremely important role in regional behavior but also influences ice dynamics over much larger zones in ways that are currently not well understood. To this end, our research findings through this project offers significant advancement to the field and closes a large gap of knowledge in understanding and modeling the fracture of ice sheets in the polar regions. Thus, we believe that our objective has been achieved and our research accomplishments are significant. This is corroborated through a set of published papers, posters and presentations at technical conferences in the field. In particular significant progress has been made in the mechanics of ice, fracture of ice sheets and ice shelves in polar regions and sophisticated numerical methods that enable the solution of the physics in an efficient way.

  20. Laurentide Ice Sheet meltwater and abrupt climate change during the last glaciation

    SciTech Connect (OSTI)

    Hill, H W; Flower, B P; Quinn, T M; Hollander, D J; Guilderson, T P

    2005-10-02T23:59:59.000Z

    A leading hypothesis to explain abrupt climate change during the last glacial cycle calls on fluctuations in the margin of the North American Laurentide Ice Sheet (LIS), which may have routed freshwater between the Gulf of Mexico (GOM) and North Atlantic, affecting North Atlantic Deep Water (NADW) variability and regional climate. Paired measurements of {delta}O and Mg/Ca of foraminiferal calcite from GOM sediments reveal five episodes of LIS meltwater input from 28-45 thousand years ago (ka) that do not match the millennial-scale Dansgaard-Oeschger (D/O) warmings recorded in Greenland ice. We suggest that summer melting of the LIS may occur during Antarctic warming and likely contributed to sea-level variability during Marine Isotope Stage 3 (MIS 3).

  1. Changes in Sea-Level associated with Modi cations of the Mass Balance of the Greenland and Antarctic

    E-Print Network [OSTI]

    Changes in Sea-Level associated with Modi cations of the Mass Balance of the Greenland and Antarctic Ice Sheets over the 21st Century V eronique Bugnion Abstract Changes in runo from Greenland for estimating melting and runo . All models are solved on 20 and 40 km grids respectively for Greenland

  2. Adaptive mesh, finite volume modeling of marine ice sheets Stephen L. Cornforda

    E-Print Network [OSTI]

    Adaptive mesh, finite volume modeling of marine ice sheets Stephen L. Cornforda , Daniel F. Martinb Abstract Continental scale marine ice sheets such as the present day West Antarctic Ice Sheet are strongly phenomenon of this kind is the migration of the grounding line -- the division between ice in contact

  3. Ice sheets and their dynamics Continuum thermo-mechanical model of a glacier

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Ice sheets and their dynamics Continuum thermo-mechanical model of a glacier Shallow Ice Approximation (SIA) SIA-I Iterative Improvement Technique Benchmarks Numerical modeling of ice-sheet dynamics and Cartography, Zdiby 1.6.2010 Ondej Soucek Ph.D. defense #12;Ice sheets and their dynamics Continuum thermo

  4. An in situ measurement of the radio-frequency attenuation in ice at Summit Station, Greenland

    E-Print Network [OSTI]

    J. Avva; J. M. Kovac; C. Miki; D. Saltzberg; A. G. Vieregg

    2014-09-30T23:59:59.000Z

    We report an in situ measurement of the electric field attenuation length at radio frequencies for the bulk ice at Summit Station, Greenland, made by broadcasting radio-frequency signals vertically through the ice and measuring the relative power in the return ground bounce signal. We find the depth-averaged field attenuation length to be 947 +92/-85 meters at 75 MHz. While this measurement has clear radioglaciological applications, the radio clarity of the ice also has implications for the detection of ultra-high energy (UHE) astrophysical particles via their radio emission in dielectric media such as ice. The measured attenuation length at Summit Station is comparable to previously measured radio-frequency attenuation lengths at candidate particle detector sites around the world, and strengthens the case for Summit Station as the most promising northern site for UHE neutrino detection.

  5. Hydrology and dynamics of a land-terminating Greenland outlet glacier 

    E-Print Network [OSTI]

    Bartholomew, Ian David

    2012-11-29T23:59:59.000Z

    The purpose of this thesis is to investigate the hydrology and dynamics of a land-terminating outlet glacier on the western margin of the Greenland Ice Sheet (GrIS). The investigations are motivated by uncertainty about ...

  6. Complex systems influence melting of Greenland ice sheet

    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 Administration would like submit the followingthMeasurementsMay-20,-2015 SignComplex systems

  7. Team advances understanding of the Greenland Ice Sheet's meltwater

    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. DOE Office of ScienceandMesa del SolStrengthening a solidSynthesis of 2D AlloysTrails News Home | ORNL | News

  8. TERAGRID 2007 CONFERENCE, MADISON, WI 1 Cyberinfrastructure for Remote Sensing of Ice Sheets

    E-Print Network [OSTI]

    TERAGRID 2007 CONFERENCE, MADISON, WI 1 Cyberinfrastructure for Remote Sensing of Ice Sheets Dr rise and melting ice sheets is the application domain of this project. It is an issue of global impor of computationally intensive tools and models that will help them measure and predict the response of ice sheets

  9. Increasing the Scalability of PISM for High Resolution Ice Sheet Models Phillip Dickens

    E-Print Network [OSTI]

    Dickens, Phillip M.

    Increasing the Scalability of PISM for High Resolution Ice Sheet Models Phillip Dickens School at large. One important piece of the climate puzzle is how the dynamics of large-scale ice sheets developed several simulation models to predict and understand the behavior of large-scale ice sheets

  10. ESTIMATING BEDROCK AND SURFACE LAYER BOUNDARIES AND CONFIDENCE INTERVALS IN ICE SHEET RADAR IMAGERY USING MCMC

    E-Print Network [OSTI]

    Menczer, Filippo

    ESTIMATING BEDROCK AND SURFACE LAYER BOUNDARIES AND CONFIDENCE INTERVALS IN ICE SHEET RADAR IMAGERY and Computing Indiana University Bloomington, Indiana USA ABSTRACT Climate models that predict polar ice sheet behavior require accurate measurements of the bedrock-ice and ice-air bound- aries in ground

  11. BOREAS INTRODUCTION Fennoscandian Ice Sheet in MIS 3 Introduction

    E-Print Network [OSTI]

    Wohlfarth, Barbara

    an important re- ference for the safety assessments performed by the Swedish Nuclear Fuel and Waste Management nuclear fuel repositories. Our knowledge regarding the history of the Fennoscandian Ice Sheet during forcing mechanisms, and offers data sets that are necessary for assessing the long-term safety of spent

  12. Intelligent Matchmaking for Polar Ice Sheet Data Collection and Delivery

    E-Print Network [OSTI]

    Kansas, University of

    of intelligent radars integrated into robotic vehicles. They autonomously decide where and how to measure to map near- surface layers. These sensors are integrated into two vehicles; an autonomous robotic Abstract-- The PRISM (Polar Radar for Ice Sheet Measurement) project is developing mobile, autonomous

  13. 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...

  14. Time-variable gravity observations of ice sheet mass balance: Precision and limitations of the GRACE satellite data

    E-Print Network [OSTI]

    Velicogna, I.; Wahr, J.

    2013-01-01T23:59:59.000Z

    observations, Science, 314, Peltier, W. R. (2004), Globalice history models (ICE5G [Peltier, 2004] and Fleming andfor Greenland; ICE5G [Peltier, 2004] and IJ05 [Ivins and

  15. Under consideration for publication in J. Fluid Mech. 1 Ocean waves and ice sheets

    E-Print Network [OSTI]

    Craster, Richard

    ; Wadhams & Holt, 1991) to pack ice (Robin, 1963) and even glacial ice tongues (Holdsworth, 1969; Squire etUnder consideration for publication in J. Fluid Mech. 1 Ocean waves and ice sheets By N. J waves incident on ice­covered ocean. The ice cover is idealized as a plate of elastic material for which

  16. FactSheet-TWP_ICE.indd

    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 AdministrationField8,Dist. Category UC-lFederalFYRANDOM DRUG TESTINGFactFact SheetsARMWarm

  17. A Computational Study of the Spreading of Oil Underneath a Sheet of Ice

    E-Print Network [OSTI]

    Soatto, Stefano

    A Computational Study of the Spreading of Oil Underneath a Sheet of Ice Mark Sussman Department) Abstract The spreading of oil underneath a sheet of ice is computed using an adaptive level set method the final steady profile of a body of oil under ice in water. The computational models are used to make

  18. The environmental record in glaciers and ice sheets

    SciTech Connect (OSTI)

    Oeschger, H.; Langway, C.C. Jr. (eds.)

    1989-01-01T23:59:59.000Z

    This book conveys from different points of view a sense of the variables involved in the formation and movement of glacial ice and the kinds of information held in the various glaciers. It also covers methodology and presents examples of recent findings and unexplored pathways. Verifying ice core chronology is a major challenge. Radioactive constituents such as {sup 14}C, {sup 10}Be, and {sup 81}Kr produced in the atmosphere by cosmic radiation can be useful for dating within the ranges of their respective half-lives. Abrupt changes in carbon dioxide concentration during an approximately 10,000-year period at a depth of about 2 kilometers in ice from the Dye 3 core (southern Greenland) and their evident correlation with changes in {sup 18}O values arouse great curiosity. Other abrupt (on a geologic time scale) changes in such parameters bear witness to large changes in climate in periods of a century or less. The presence of pollen testifies to the large body of unexploited information in these cores. Dating of pollen deposits, identification of species, and correlation of the resulting data with varve information on continental and ocean sediments should give new insight into climate change, species adaptation, forest migration, and back trajectories of air masses.

  19. Where might we find evidence of a Last Interglacial West Antarctic Ice Sheet collapse in Antarctic ice core records?

    E-Print Network [OSTI]

    Siddall, Mark

    increased melting from valley glaciers and small ice caps (estimated ~0.6±0.1 m, Radi and Hock, 2010), oceanWhere might we find evidence of a Last Interglacial West Antarctic Ice Sheet collapse in Antarctic ice core records? S.L. Bradley a, , M. Siddall a , G.A. Milne b , V. Masson-Delmotte c , E. Wolff d

  20. Geomorphology and dynamics of the British-Irish Ice Sheet in western Scotland 

    E-Print Network [OSTI]

    Finlayson, Andrew

    2014-06-30T23:59:59.000Z

    Predicting the long-term behaviour of present-day ice sheets is hampered by the short timescales of our observations and restricted knowledge of the subglacial environment. Studying palaeoice sheets can help by revealing ...

  1. Simulation of the Fennoscandian ice sheet during the last glaciation using

    E-Print Network [OSTI]

    sliding is triggered when basal temperatures reach melting point of ice sliding is proportional to power- mechanical ice sheet model coupled to an isostatic adjustment model. The model predicts thermal conditions

  2. Ice-sheet model sensitivities to environmental forcing and their use in projecting future sea level (the SeaRISE project)

    E-Print Network [OSTI]

    2013-01-01T23:59:59.000Z

    for shallow polythermal ice sheets. Philos. Trans. R. Soc.doi:10.3189/2013JoG12J125 Ice-sheet model sensitivities to1993) On the initiation of ice sheets. Ann. Glaciol. , 18,

  3. Gas ageice age differences and the chronology of the Vostok ice core, M. L. Bender,1

    E-Print Network [OSTI]

    Chappellaz, Jérôme

    Gas age­ice age differences and the chronology of the Vostok ice core, 0­100 ka M. L. Bender,1 G. [1] Gas is trapped in polar ice at depths of $50­120 m and is therefore significantly younger than cores (Vostok, Dome Fuji, and Dome C). We recorrelate the gas records of Vostok and Greenland Ice Sheet

  4. This news release accompanies the press conference, "Greenland Glaciers: What Lies Beneath," to be given Wednesday, December 16, 2009, at 9:00 a.m. PT (12:00 NOON ET) at the American Geophysical Union Meeting

    E-Print Network [OSTI]

    Howat, Ian M.

    on acceleration and ice loss -- through fast-moving outlet glaciers that connect the inland ice sheet to the ocean-cost technologies to track the flow of glaciers and get a glimpse of what lies beneath the ice. As ice melts, water-more- This news release accompanies the press conference, "Greenland Glaciers: What Lies Beneath

  5. Reconstruction of the Past and Forecast of the Future European and British Ice Sheets and Associated Sea–Level Change 

    E-Print Network [OSTI]

    Hagdorn, Magnus K M

    The aim of this project is to improve our understanding of the past European and British ice sheets as a basis for forecasting their future. The behaviour of these ice sheets is investigated by simulating them using a ...

  6. rsted Lecture at DTU, 1 November 2013 at 14:00 Mechanics on our planet: Ice sheets,

    E-Print Network [OSTI]

    , Hydraulic fractures James R. Rice (Harvard) Ice sheet collaborators: Thibaut Perol (Harvard), John D. Platt (Univ.Col.London), John D. Platt (Harvard), John W. Rudnicki (Northwestern) #12;The major ice sheets

  7. Ice sheet limits in Norway and on the Norwegian continental shelf Jan Mangerud

    E-Print Network [OSTI]

    Ingólfsson, �lafur

    Ice sheet limits in Norway and on the Norwegian continental shelf Jan Mangerud University of Bergen, Department of Geology, Allégt. 41, N-5007 Bergen, Norway Jan.Mangerud@geol.uib.no Introduction Ice sheets the author will briefly review present knowledge of the glacial history of Norway. The recon- struction

  8. View of NY harbor from the JOIDES Resolution in an ice-free world (73 m rise)

    E-Print Network [OSTI]

    less dense global 20th century warming ~0.6°C 1.6 mm/yr sea-level rise Melting Glaciers & Ice Caps? Melting Mountain Glaciers and Ice Caps: Alpine glaciers 0.6 mm/yr Greenland Ice Cap IPCC2001: near 0-80 cm IPPC 2007 error: 20-60 cm (does not include ice sheet melting) http

  9. 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

  10. Modelling West Antarctic ice sheet growth and collapse through the past five million years

    E-Print Network [OSTI]

    , isolated ice caps on West Antarctic islands. Transitions between glacial, intermediate and collapsed states temperature and specified sea level. A new parameterization of sub- ice-shelf ocean melt based on modernLETTERS Modelling West Antarctic ice sheet growth and collapse through the past five million years

  11. Feasibility study for mapping the polar ice bottom topography using interferometric synthetic-aperture

    E-Print Network [OSTI]

    Kansas, University of

    interferometric synthetic-aperture radar processing for basal surface topography mapping of the thickest GreenlandFeasibility study for mapping the polar ice bottom topography using interferometric synthetic sheets. Ice bottom topography drives ice dynamics, which affects the mass balance. Accurate information

  12. 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

  13. 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...

  14. A parallel high-order accurate finite element nonlinear Stokes ice sheet model and benchmark experiments

    SciTech Connect (OSTI)

    Leng, Wei [Chinese Academy of Sciences; Ju, Lili [University of South Carolina; Gunzburger, Max [Florida State University; Price, Stephen [Los Alamos National Laboratory; Ringler, Todd [Los Alamos National Laboratory,

    2012-01-01T23:59:59.000Z

    The numerical modeling of glacier and ice sheet evolution is a subject of growing interest, in part because of the potential for models to inform estimates of global sea level change. This paper focuses on the development of a numerical model that determines the velocity and pressure fields within an ice sheet. Our numerical model features a high-fidelity mathematical model involving the nonlinear Stokes system and combinations of no-sliding and sliding basal boundary conditions, high-order accurate finite element discretizations based on variable resolution grids, and highly scalable parallel solution strategies, all of which contribute to a numerical model that can achieve accurate velocity and pressure approximations in a highly efficient manner. We demonstrate the accuracy and efficiency of our model by analytical solution tests, established ice sheet benchmark experiments, and comparisons with other well-established ice sheet models.

  15. Scalable, Efficient, and Accurate Community Ice Sheet Model (SEACISM) PRINCIPAL INVESTIGATOR: Katherine J. Evans

    E-Print Network [OSTI]

    as a component of the Community Earth System Model (CESM); the computation- ally-modern Glimmer-CISM could need to provide better ice sheet dynamics simu- lations in Earth system models to more accurately

  16. The shallow shelf approximation as a "sliding law" in a thermomechanically coupled ice sheet model

    E-Print Network [OSTI]

    Bueler, Ed

    2008-01-01T23:59:59.000Z

    The shallow shelf approximation is a better ``sliding law'' for ice sheet modeling than those sliding laws in which basal velocity is a function of driving stress. The shallow shelf approximation as formulated by \\emph{Schoof} [2006a] is well-suited to this use. Our new thermomechanically coupled sliding scheme is based on a plasticity assumption about the strength of the saturated till underlying the ice sheet in which the till yield stress is given by a Mohr-Coulomb formula using a modeled pore water pressure. Using this scheme, our prognostic whole ice sheet model has convincing ice streams. Driving stress is balanced in part by membrane stresses, the model is computable at high spatial resolution in parallel, it is stable with respect to parameter changes, and it produces surface velocities seen in actual ice streams.

  17. 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

  18. Rapid Holocene Deglaciation of the Labrador Sector of the Laurentide Ice Sheet ANDERS E. CARLSON* AND PETER U. CLARK

    E-Print Network [OSTI]

    Kurapov, Alexander

    Bay 8.4 cal ka BP (Barber et al. 1999), which caused the LIS to fragment into three ice caps that wereRapid Holocene Deglaciation of the Labrador Sector of the Laurentide Ice Sheet ANDERS E. CARLSON, in final form 31 January 2007) ABSTRACT Retreat of the Laurentide Ice Sheet (LIS) following the Last

  19. Rapid Holocene Deglaciation of the Labrador Sector of the Laurentide Ice Sheet ANDERS E. CARLSON* AND PETER U. CLARK

    E-Print Network [OSTI]

    ), which caused the LIS to fragment into three ice caps that were rem- nants of the three originallyRapid Holocene Deglaciation of the Labrador Sector of the Laurentide Ice Sheet ANDERS E. CARLSON, in final form 31 January 2007) ABSTRACT Retreat of the Laurentide Ice Sheet (LIS) following the Last

  20. A Bayesian Network for Autonomous Sensor Control during Polar Ice Sheet Measurements

    E-Print Network [OSTI]

    Kansas, University of

    of environmental and sensor- related factors. The PRISM sensors are placed on autonomous robotic vehicles ("roversA Bayesian Network for Autonomous Sensor Control during Polar Ice Sheet Measurements Sudha sheets. An important component of PRISM is an intelligent, autonomous Synthetic Aperture Radar that can

  1. Constraints on the lake volume required for hydro-fracture through ice sheets

    E-Print Network [OSTI]

    Skemer, Philip

    Constraints on the lake volume required for hydro-fracture through ice sheets M. J. Krawczynski,1 M April 2009; published 16 May 2009. [1] Water-filled cracks are an effective mechanism to drive hydro to rapidly drive hydro-fractures through 1­1.5 km of subfreezing ice. This represents $98% of the meltwater

  2. An update on land-ice modeling in the CESM

    SciTech Connect (OSTI)

    Lipscomb, William H [Los Alamos National Laboratory

    2011-01-18T23:59:59.000Z

    Mass loss from land ice, including the Greenland and Antarctic ice sheets as well as smaller glacier and ice caps, is making a large and growing contribution to global sea-level rise. Land ice is only beginning to be incorporated in climate models. The goal of the Land Ice Working Group (LIWG) is to develop improved land-ice models and incorporate them in CESM, in order to provide useful, physically-based sea-level predictions. LJWG efforts to date have led to the inclusion of a dynamic ice-sheet model (the Glimmer Community Ice Sheet Model, or Glimmer-CISM) in the Community Earth System Model (CESM), which was released in June 2010. CESM also includes a new surface-mass-balance scheme for ice sheets in the Community Land Model. Initial modeling efforts are focused on the Greenland ice sheet. Preliminary results are promising. In particular, the simulated surface mass balance for Greenland is in good agreement with observations and regional model results. The current model, however, has significant limitations: The land-ice coupling is one-way; we are using a serial version of Glimmer-CISM with the shallow-ice approximation; and there is no ice-ocean coupling. During the next year we plan to implement two-way coupling (including ice-ocean coupling with a dynamic Antarctic ice sheet) with a parallel , higher-order version of Glimmer-CISM. We will also add parameterizations of small glaciers and ice caps. With these model improvements, CESM will be able to simulate all the major contributors to 21st century global sea-level rise. Results of the first round of simulations should be available in time to be included in the Fifth Assessment Report (ARS) of the Intergovernmental Panel on Climate Change.

  3. Observations of hydroxyl and peroxy radicals and the impact of BrO at Summit, Greenland in 2007 and 2008

    E-Print Network [OSTI]

    2011-01-01T23:59:59.000Z

    investigations at Summit, Greenland: An overview, J.upon ice particles in the Greenland snowpack, Geophys. Res.the snowpack at Summit, Greenland, Atmos. Environ. , 36,

  4. Challenges to Understanding the Dynamic Response of Greenland's Marine Terminating Glaciers to Oceanic and Atmospheric Forcing

    E-Print Network [OSTI]

    Straneo, Fiammetta

    The recent retreat and speedup of outlet glaciers, as well as enhanced surface melting around the ice sheet margin, have increased Greenland's contribution to sea level rise to 0.6 ± 0.1 mm yr[superscript ?1] and its ...

  5. Modeling Abrupt Change in Global Sea Level Arising from Ocean - Ice-Sheet Interaction

    SciTech Connect (OSTI)

    David M Holland

    2011-09-24T23:59:59.000Z

    It is proposed to develop, validate, and apply a coupled ocean ice-sheet model to simulate possible, abrupt future change in global sea level. This research is to be carried out collaboratively between an academic institute and a Department of Energy Laboratory (DOE), namely, the PI and a graduate student at New York University (NYU) and climate model researchers at the Los Alamos National Laboratory (LANL). The NYU contribution is mainly in the area of incorporating new physical processes into the model, while the LANL efforts are focused on improved numerics and overall model development. NYU and LANL will work together on applying the model to a variety of modeling scenarios of recent past and possible near-future abrupt change to the configuration of the periphery of the major ice sheets. The project's ultimate goal is to provide a robust, accurate prediction of future global sea level change, a feat that no fully-coupled climate model is currently capable of producing. This proposal seeks to advance that ultimate goal by developing, validating, and applying a regional model that can simulate the detailed processes involved in sea-level change due to oceanÃ?Â? ice-sheet interaction. Directly modeling ocean ice-sheet processes in a fully-coupled global climate model is not a feasible activity at present given the near-complete absence of development of any such causal mechanism in these models to date.

  6. Glaciohydraulic supercooling in former ice sheets? Grahame J. Larson a,*, Daniel E. Lawson b

    E-Print Network [OSTI]

    Lachniet, Matthew S.

    a Department of Geological Sciences, Michigan State University, East Lansing MI 48824, USA b Geophysical Vegas, NV 89154-4010, USA g Department of Geology, Central Michigan University, Mount Pleasant, MI 48859Glaciohydraulic supercooling in former ice sheets? Grahame J. Larson a,*, Daniel E. Lawson b

  7. Quaternary Science Reviews 27 (2008) 941955 Chronological constraints on Cordilleran Ice Sheet glaciomarine

    E-Print Network [OSTI]

    Pedersen, Tom

    2008-01-01T23:59:59.000Z

    ,Ã, A.S. Changb a Department of Geological Sciences, University of Michigan, Ann Arbor, MI 48109 1005Quaternary Science Reviews 27 (2008) 941­955 Chronological constraints on Cordilleran Ice Sheet, USA b School of Earth and Ocean Sciences, University of Victoria, Victoria, BC, Canada Received 12

  8. Development and Applications of the Community Ice Sheet Model

    SciTech Connect (OSTI)

    Hoffman, Matthew J. [Los Alamos National Laboratory; Lipscomb, William H. [Los Alamos National Laboratory; Price, Stephen F. [Los Alamos National Laboratory; Johnson, Jesse [University of Montana; Sacks, William [National Center for Atmospheric Research

    2012-07-23T23:59:59.000Z

    The initial goals of the project are: (1) create a model for land ice that includes relevant and necessary dynamics, physical processes, and couplings; and (2) apply that model to say something more substantial about SLR in Lme for IPCC AR5 (AR6?).

  9. Ice cores drilled from lake and ocean floors, continents, and ice sheets provide geoscientists with the most extensive and accurate picture of the earth!s

    E-Print Network [OSTI]

    Johnson, Andrew

    zer Ice cores drilled from lake and ocean floors, continents, and ice sheets provide geoscientists technologies and advanced equipment like high-resolution color line-scanners and multi-sensor data loggers displays run by a single computer all the way down to the new MacBook. Future development will incorporate

  10. Sensitive response of the Greenland Ice Sheet to surface melt drainage over soft bed

    E-Print Network [OSTI]

    Bougamont, M H; Christoffersen,P.; Hubbard, A. L.; Fitzpatrick, A. A.; Doyle, S. H.; Carter, S. P.

    2014-09-29T23:59:59.000Z

    by detailed energy balance observations. The Cryosphere 6, 199-209, doi:doi:10.5194/tc-6-199-2012 (2012). ... by frictional and geothermal heating accumulates at the 136 bed over the course of winter and is released together with the first SGL drainage 137 events. With either one of these factors included, our model was able to reproduce the 138 2010 spring...

  11. New Method Relates Greenland Ice Sheet Changes to Sea-Level Rise | U.S. DOE

    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:Energy: Grid Integration Redefining What's Possible for Renewable Energy:Nanowire Solar541,9337, 2011R - 445 CU -Standards Beganof

  12. Meltwater effects on flow of Greenland's ice sheet less severe for sea

    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. DOE Office of Science (SC)Integrated Codes |IsLove Your Home andDispositionMechanicalAbout UsHomelevel rise than

  13. Meltwater effects on flow of Greenland's ice sheet less severe for sea

    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. DOE Office of Science (SC)Integrated Codes |IsLove Your Home andDispositionMechanicalAbout UsHomelevel rise

  14. Greenland Ice Sheet "Sliding" a Small Contributor to Future Sea-Level

    Office of Science (SC) Website

    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:Energy: Grid Integration Redefining What'sis Taking Over OurThe Iron4(SC) MappingOctober 12,U.S. DOEGas PhaseGrant/CooperativeRise | U.S.

  15. Earth Planets Space, 57, 895902, 2005 Short time-scale heating of the Earth's mantle by ice-sheet dynamics

    E-Print Network [OSTI]

    Hanyk, Ladislav

    by modeling the linear response of a self-gravitating viscoelastic planet, the gravity field anoma- lies haveEarth Planets Space, 57, 895­902, 2005 Short time-scale heating of the Earth's mantle by ice-scale energy transfer from the ice sheet loading and unloading processes to the Earth's interior via viscous

  16. Formation of lobate debris aprons on Mars: Assessment of regional ice sheet collapse and debris-cover armoring

    E-Print Network [OSTI]

    Marchant, David R.

    not have attained temperatures near or above the ice melting point and retained their current shape, a findFormation of lobate debris aprons on Mars: Assessment of regional ice sheet collapse and debris Keywords: Mars, climate Mars, surface Mars, polar geology Mars, polar caps a b s t r a c t Lobate debris

  17. The satellite gravimetry measurements from GRACE enable analysis of mass changes on Earth, including recent mass loss from ice sheets and glaciers. However, GRACE

    E-Print Network [OSTI]

    Utrecht, Universiteit

    , including recent mass loss from ice sheets and glaciers. However, GRACE resolution is coarse (~300 km), where glaciers have lost ~600 Gt of ice since 2003. CAA consists of a northern part (NCAA), where several large ice caps exist, and a southern part (SCAA), with two large ice caps, many smaller glaciers

  18. 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

  19. Seasonally resolved Alpine and Greenland ice core records of anthropogenic HCl emissions over the 20th century

    E-Print Network [OSTI]

    Fischer, Hubertus

    biomass burning activity in western Europe. From 1925 to 1960 the HCl levels were slightly higher (3­9 ng of atmospheric HCl pollution over Europe and Greenland since the early 20th century. The evaluation of the HCl gÀ1 ), mainly due to growing coal burning emissions in western Europe. In the late 1960s a sharp

  20. Feasibility of reconstructing paleoatmospheric records of selected alkanes, methyl halides, and sulfur gases from Greenland ice cores

    E-Print Network [OSTI]

    Aydin, M.; Williams, M. B; Saltzman, E. S

    2007-01-01T23:59:59.000Z

    drilling fluid, which probably penetrated the ice along fractures that later healed, appear to contaminate C 3 H 8 as well

  1. Dynamically coupling the non-linear Stokes equations with the Shallow Ice Approximation in glaciology: Description and first applications of the ISCAL method

    E-Print Network [OSTI]

    Ahlkrona, Josefin; Kirchner, Nina; Zwinger, Thomas

    2015-01-01T23:59:59.000Z

    We propose and implement a new method, called the Ice Sheet Coupled Approximation Levels (ISCAL) method, for simulation of ice sheet flow in large domains under long time-intervals. The method couples the exact, full Stokes (FS) equations with the Shallow Ice Approximation (SIA). The part of the domain where SIA is applied is determined automatically and dynamically based on estimates of the modeling error. For a three dimensional model problem where the number of degrees of freedom is comparable to a real world application, ISCAL performs almost an order of magnitude faster with a low reduction in accuracy compared to a monolithic FS. Furthermore, ISCAL is shown to be able to detect rapid dynamic changes in the flow. Three different error estimations are applied and compared. Finally, ISCAL is applied to the Greenland Ice Sheet, proving ISCAL to be a potential valuable tool for the ice sheet modeling community.

  2. Measuring Greenland Glacier Dynamics with Remotely Sensed Data

    E-Print Network [OSTI]

    Foga, Steve

    2013-01-15T23:59:59.000Z

    Measuring Greenland Glacier Dynamics with Remotely Sensed Data Steve Foga University of Kansas, Geography M.A. Student Photo by: Phil Pasquini The importance of studying glacier ice Study area Difference in ice velocity of Helheim Glacier...

  3. COMMUNITY PROFILE Greenland, New Hampshire

    E-Print Network [OSTI]

    New Hampshire, University of

    GREENLAND COMMUNITY PROFILE REPORT Greenland, New Hampshire February 3 & 4, 2006 #12;TABLE......................................................................................................................................3 Creating a Community Profile in Greenland

  4. A new era of sub-millimeter GRB afterglow follow-ups with the Greenland Telescope

    E-Print Network [OSTI]

    Urata, Yuji; Asada, Keiichi; Hirashita, Hiroyuki; Inoue, Makoto; Ho, Paul T P

    2015-01-01T23:59:59.000Z

    A planned rapid submillimeter (submm) Gamma Ray Burst (GRBs) follow-up observations conducted using the Greenland Telescope (GLT) is presented. The GLT is a 12-m submm telescope to be located at the top of the Greenland ice sheet, where the high-altitude and dry weather porvides excellent conditions for observations at submm wavelengths. With its combination of wavelength window and rapid responding system, the GLT will explore new insights on GRBs. Summarizing the current achievements of submm GRB follow-ups, we identify the following three scientific goals regarding GRBs: (1) systematic detection of bright submm emissions originating from reverse shock (RS) in the early afterglow phase, (2) characterization of forward shock and RS emissions by capturing their peak flux and frequencies and performing continuous monitoring, and (3) detections of GRBs as a result of the explosion of first-generation stars result of GRBs at a high redshift through systematic rapid follow ups. The light curves and spectra calcul...

  5. OSL ages on glaciofluvial sediment in northern Lower Michigan constrain expansion of the Laurentide ice sheet

    E-Print Network [OSTI]

    Schaetzl, Randall

    , Michigan State University, East Lansing, MI 48824-1117, USA b Department of Earth and Environmental for the MIS 2 (late Wisconsin) advance into central northern Lower Michigan. We suggest that widespread ice chronologic control on the advancing MIS 2 ice margin in this part of Lower Michigan and refine the under

  6. Low time resolution analysis of polar ice cores cannot detect impulsive nitrate events

    E-Print Network [OSTI]

    Smart, D F; Melott, A L; Laird, C M

    2015-01-01T23:59:59.000Z

    Ice cores are archives of climate change and possibly large solar proton events (SPEs). Wolff et al. (2012) used a single event, a nitrate peak in the GISP2-H core, which McCracken et al. (2001a) time associated with the poorly quantified 1859 Carrington event, to discredit SPE-produced, impulsive nitrate deposition in polar ice. This is not the ideal test case. We critique the Wolff et al. analysis and demonstrate that the data they used cannot detect impulsive nitrate events because of resolution limitations. We suggest re-examination of the top of the Greenland ice sheet at key intervals over the last two millennia with attention to fine resolution and replicate sampling of multiple species. This will allow further insight into polar depositional processes on a sub-seasonal scale, including atmospheric sources, transport mechanisms to the ice sheet, post-depositional interactions, and a potential SPE association.

  7. A View of Antarctic Ice-Sheet Evolution from Sea-Level and Deep-Sea Isotope Changes During the Late Cretaceous-Cenozoic

    E-Print Network [OSTI]

    Miller, K. G.; Wright, J. D.; Katz, M. E.; Browning, J. V.; Cramer, B. S.; Wade, Bridget S.; Mizintseva, S. F.

    2008-01-01T23:59:59.000Z

    . Proceedings of the 10th International Symposium on Antarctic Earth Sciences. Washington, DC: The National Academies Press. doi:10.3133/of2007-1047.kp06 A View of Antarctic Ice-Sheet Evolution from Sea-Level and Deep-Sea Isotope Changes During the Late...

  8. Mapping Greenland's mass loss in space and time Christopher Harig1

    E-Print Network [OSTI]

    Simons, Frederik J.

    Mapping Greenland's mass loss in space and time Christopher Harig1 and Frederik J. Simons lost from the Greenland ice cap, based on satellite gravity data collected by the Gravity Recovery distribution of Greenland's mass loss and how the geographical pattern has varied on relatively shorter time

  9. 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.

  10. Glaciers, ice sheets, and sea level: effect of a CO/sub 2/-induced climatic change

    SciTech Connect (OSTI)

    none,

    1985-09-01T23:59:59.000Z

    The workshop examined the basic questions of how much water has been exchanged between land ice and ocean during the last century, what is happening now, and, given existing climate-modeling prediction, how much exchange can be expected in the next century. In addition, the evidence for exchange was examined and gaps in that evidence were identified. The report includes the 23 presentations made at the workshop, summarizes the workshop discussion, and presents the Committee's findings and recommendations. Separate abstracts have been prepared for the 23 presentations.

  11. Comparison and verification of enthalpy schemes for polythermal glaciers and ice sheets with a one-dimensional model

    E-Print Network [OSTI]

    Blatter, Heinz

    2014-01-01T23:59:59.000Z

    The enthalpy method for the thermodynamics of polythermal glaciers and ice sheets is tested and verified by a one-dimensional problem (parallel-sided slab). The enthalpy method alone does not include explicitly the Stefan-type energy- and mass-flux matching conditions at the cold-temperate transition surface (CTS) that separates the upper cold from the lower temperate layer. However, these transition conditions are important for correctly determining the position of the CTS. For the numerical solution of the polythermal slab problem, we consider a two-layer front-tracking scheme as well as three different one-layer schemes that feature a single grid for both layers. Computed steady-state temperature and moisture profiles are verified with exact solutions, and transient solutions computed by the one-layer schemes are compared with those of the two-layer scheme, considered to be a reliable reference. While the conventional one-layer enthalpy scheme (that does not include the transition conditions at the CTS) ca...

  12. Sources and fate of freshwater exported in the East Greenland Current Paul A. Dodd,1,2

    E-Print Network [OSTI]

    Naveira Garabato, Alberto

    Sources and fate of freshwater exported in the East Greenland Current Paul A. Dodd,1,2 Karen J] Monitoring the sources and fate of freshwater in the East Greenland Current (EGC) is important, as this water, with a significant proportion of sea ice drifting into the Nordic Seas or on to the East Greenland Shelf. We conclude

  13. Meltwater flux and runoff modeling in the abalation area of jakobshavn Isbrae, West Greenland

    SciTech Connect (OSTI)

    Mernild, Sebastian Haugard [Los Alamos National Laboratory; Chylek, Petr [Los Alamos National Laboratory; Liston, Glen [COLORADO STATE UNIV.; Steffen, Konrad [UNIV OF COLORADO

    2009-01-01T23:59:59.000Z

    The temporal variability in surface snow and glacier melt flux and runoff were investigated for the ablation area of lakobshavn Isbrae, West Greenland. High-resolution meteorological observations both on and outside the Greenland Ice Sheet (GrIS) were used as model input. Realistic descriptions of snow accumulation, snow and glacier-ice melt, and runoff are essential to understand trends in ice sheet surface properties and processes. SnowModel, a physically based, spatially distributed meteorological and snow-evolution modeling system was used to simulate the temporal variability of lakobshavn Isbrre accumulation and ablation processes for 2000/01-2006/07. Winter snow-depth observations and MODIS satellite-derived summer melt observations were used for model validation of accumulation and ablation. Simulations agreed well with observed values. Simulated annual surface melt varied from as low as 3.83 x 10{sup 9} m{sup 3} (2001/02) to as high as 8.64 x 10{sup 9} m{sup 3} (2004/05). Modeled surface melt occurred at elevations reaching 1,870 m a.s.l. for 2004/05, while the equilibrium line altitude (ELA) fluctuated from 990 to 1,210 m a.s.l. during the simulation period. The SnowModel meltwater retention and refreezing routines considerably reduce the amount of meltwater available as ice sheet runoff; without these routines the lakobshavn surface runoff would be overestimated by an average of 80%. From September/October through May/June no runoff events were simulated. The modeled interannual runoff variability varied from 1.81 x 10{sup 9} m{sup 3} (2001/02) to 5.21 x 10{sup 9} m{sup 3} (2004/05), yielding a cumulative runoff at the Jakobshavn glacier terminus of {approx}2.25 m w.eq. to {approx}4.5 m w.eq., respectively. The average modeled lakobshavn runoff of {approx}3.4 km{sup 3} y{sup -1} was merged with previous estimates of Jakobshavn ice discharge to quantify the freshwater flux to Illulissat Icefiord. For both runoff and ice discharge the average trends are similar, indicating increasing (insignificant) influx of freshwater to the Illulissat Icefiord for the period 2000/01-2006/07. This study suggests that surface runoff forms a minor part of the overall Jakobshavn freshwater flux to the fiord: around 7% ({approx}3.4 km{sup 3} y{sup -1}) of the average annual freshwater flux of {approx}51.0 km{sup 3} y{sup -1} originates from the surface runoff.

  14. Carbon dioxide effects research and assessment program. Environmental and societal consequences of a possible CO/sub 2/-induced climate change: volume II, part I. Response of the West Antarctic ice sheet to CO/sub 2/-induced climatic warming

    SciTech Connect (OSTI)

    Bentley, C.

    1982-04-01T23:59:59.000Z

    The paper proposes a research plan to deal with the question of what the response of the West Antarctic Ice Sheet would be to a rise in global temperatures caused by an anthropogenic CO/sub 2/ buildup in the atmosphere. The plan is designed to answer the following questions: (1) how fast is the ice mass changing now, and why; (2) how will the boundary conditions that affect the ice sheet respond to an atmospheric temperature change and how are those boundary conditions changing now; (3) what will be the response of the ice sheet to changes in boundary conditions; and (4) what can be learned by analogy with what has happened in the past. (ACR)

  15. Journal of Glaciology, Vol. 00, No. 000, 0000 1 Improving maps of ice sheet surface elevation change using1

    E-Print Network [OSTI]

    Howat, Ian M.

    and elevations changes over rapidly changing outlet glaciers in Greenland.11 Measurements from spaceborne and airborne laser altimeters have relatively low errors but12 are spatially limited to the ground tracks and ATM as well as SPOT 5 DEMs from 2007 and 2008 and apply19 it to the outlet glaciers Jakobshavn Isbræ

  16. Isotopic tracing (Sr, Nd, U and Hf) of continental and marine aerosols in an 18th century section of the Dye-3 ice core (Greenland)

    E-Print Network [OSTI]

    Stocker, Thomas

    sea salts strontium neodymium hafnium uranium Determining the sources and pathways of atmospheric and 234 U/238 U activity ratios close to seawater. Nd variations are significant (N6 units) and are decoupled from dust composition, indicating that the Nd composition of seawater is preserved in the ice

  17. 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

  18. Sudden increase in tidal response linked to calving and acceleration at a large Greenland outlet glacier

    E-Print Network [OSTI]

    de Juan, J.; Elosegui, P.; Nettles, M.; Larsen, T.B.; Davis, J.L.; Hamilton, Gordon S.; Stearns, Leigh; Anderson, M.L.; Ekstrom, G.; Ahlstrom, A.P.; Stenseng, L.; Khan, S.A.; Forsberg, R.

    2010-06-23T23:59:59.000Z

    [1] Large calving events at Greenland's largest outlet glaciers are associated with glacial earthquakes and near-instantaneous increases in glacier flow speed. At some glaciers and ice streams, flow is also modulated in a regular way by ocean tidal...

  19. Synoptic Scale Weather Patterns Associated with Annual Snow Accumulation Variability in North-Central Greenland

    E-Print Network [OSTI]

    CHEN, SHU

    2013-08-31T23:59:59.000Z

    Abstract Previous studies on the synoptic forcing of high elevation areas of central Greenland have mostly relied on ice cores, snow pits, mesoscale models, and climate models. In this study, a radar-measured 118-year annual snow accumulation record...

  20. Slow retreat of a land based sector of the West Greenland Ice Sheet during the Holocene Thermal Maximum: evidence from threshold

    E-Print Network [OSTI]

    Briner, Jason P.

    of Geology and Mineral Resources Engineering, Norwegian University of Science and Technology, Sem Særlands to the influence of melt water on global sea level rise and potentially on large-scale ocean circulation and thus the global climate system in general (e.g. Alley et al., 2005, 2010; IPCC, 2007). Recent instrumental data

  1. 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

  2. Journal of Glaciology, Vol. 56, No. 199, 2010 805 Enhancement factors for grounded ice and ice shelves inferred

    E-Print Network [OSTI]

    Gagliardini, Olivier

    shelves inferred from an anisotropic ice-flow model Ying MA,1 Olivier GAGLIARDINI,1 Catherine RITZ,1 on the actual state of stress and strain rate. Within an ice sheet, grounded-ice parts and ice shelves have of ice anisotropy on the flow of grounded ice and ice shelves. For this purpose, a full

  3. Journal of Glaciology, Vol. 00, No. 000, 0000 1 Enhancement factors for grounded ice and ice shelves1

    E-Print Network [OSTI]

    Durand, Gaël

    shelves1 inferred from an anisotropic ice flow model2 Ying MA,1 Olivier GAGLIARDINI,1 Catherine RITZ,1 of stress and strain-rate. Within an ice sheet, grounded ice parts and ice shelves have com-11 pletely of ice anisotropy on the flow of grounded ice and ice shelves. To this pur-14 pose, a full

  4. 1, 351383, 2007 Greenland surface

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    TCD 1, 351­383, 2007 Greenland surface mass balance at the end of this century G. Krinner and N-resolution simulations of the surface mass balance of Greenland at the end of this century G. Krinner and N. Julien LGGE Correspondence to: G. Krinner (krinner@ujf-grenoble.fr) 351 #12;TCD 1, 351­383, 2007 Greenland surface mass

  5. 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...

  6. An ice shelf breakup

    SciTech Connect (OSTI)

    Fahnestock, M. [Univ. of Maryland, College Park, MD (United States)

    1996-02-09T23:59:59.000Z

    Glaciers and ice sheets are controlled by the climate and must change if the conditions that led to their current configurations are changing. These ice masses exist at the interface between the atmosphere, which provides sustaining snowfall and thermal regulation, and the land, which provides a stable base and in many cases the elevation required to reach suitably cold conditions. Ice sheets and glaciers are distributed around the globe and can serve as potential indicators of past climate variability and current climatic trends. 9 refs.

  7. Refining the pattern and relative timing of Cordilleran Ice Sheet retreat: paleogeography and evolution of late-glacial ice-marginal lakes on the southern Fraser Plateau, British Columbia

    E-Print Network [OSTI]

    Brennand, Tracy

    channels Proglacial Subglacial (small) Subglacial (large) Ice marginal ! ! ! ! Crevasse fill ! ! ! ! Grounding line ! ! ! ! Push moraine ! ! ! ! Ribbed moraine Moraines Landforms used in lake stage (foreset/topset contact) Ice-marginal channels Paleolake spillways Lake-bottom sediments Subaqueous fans

  8. XXII ICTAM, 2529 August 2008, Adelaide, Australia EXPERIMENTAL AND THEORETICAL MODELLING OF ICE SHEETSHELF GROUNDING

    E-Print Network [OSTI]

    Worster, M. Grae

    melting of the polar ice caps due to global warming, a dynamical collapse of the ice sheets has the dynamical stability of shelving ice sheets. INTRODUCTION The Antarctic ice cap contains several tensXXII ICTAM, 25­29 August 2008, Adelaide, Australia EXPERIMENTAL AND THEORETICAL MODELLING OF ICE

  9. act era proceedings: Topics by E-print Network

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

    from Greenland ice sheet accumulation: An ERA40 study M. A the Greenland Ice Sheet (GrIS) and large scale circulation patterns, cyclone frequency, and strength. Four climate...

  10. A geocoding information system for Greenland

    E-Print Network [OSTI]

    A geocoding information system for Greenland Janis Siksnans Kongens Lyngby 2012 IMM-MSc-2012-48 #12-XXXX #12;Summary Currently, addressing practices in Greenland do not fully support geocoding. Addressing the current addressing practices in Greenland. Asiaq is a public organization of the Government of Greenland

  11. Greenland Meadows LID Case Study: Water Quality

    E-Print Network [OSTI]

    Greenland Meadows LID Case Study: Water Quality Greenland Meadows is a retail shopping center built in 2008 by Newton, Mass.- based New England Development in Greenland, N.H. The development is located Development and Community Decisions can be found at http://www.unh.edu/unhsc/ftl/ Greenland Meadows features

  12. FEBRUARY 2008|158 THE GREENLAND STIRRING

    E-Print Network [OSTI]

    FEBRUARY 2008|158 THE GREENLAND STIRRING ROD: PRESSURE DRAG AND THE ATLANTIC STORM TRACK Greenland of wintertime planetary waves episodically places Greenland in the path of the polar jet stream and associated­west pressure drag exerted on Greenland's topography. Pressure drag is a key component of the zonal momentum

  13. View of NY harbor from the JOIDES Resolution! in an ice-free world (73 m rise)!

    E-Print Network [OSTI]

    Caps:! Melting land ice adds to ocean volume, but not sea ice! IPCC2001! Alpine! #12;Why Is global sea level Is rising today?! .! Melting mountain glaciers/ice caps ("alpine" and! continental ice sheets error: 20-60 cm (does not include ice sheet melting)! http://www.realclimate.org/images/sealevel_1.jpg

  14. Rapid volume loss from two East Greenland outlet glaciers quantified using repeat stereo satellite imagery

    E-Print Network [OSTI]

    Stearns, Leigh; Hamilton, Gordon S.

    2007-03-14T23:59:59.000Z

    [1] The coastal portions of Kangerdlugssuaq and Helheim glaciers in southeast Greenland lost at least 51 ± 8 km3 yr?1 of ice between 2001–2006 due to thinning and retreat, according to an analysis of sequential digital elevation models (DEMs...

  15. The influence of subglacial hydrology on the flow of West Antarctic ice streams

    E-Print Network [OSTI]

    Baker, Narelle Paula Marie

    2012-04-10T23:59:59.000Z

    Subglacial hydrology is known to influence the flow of ice. However, difficulty in accessing the base of large ice sheets has made determining the interaction between ice streams, basal sediment and water difficult to discern. The aim of this thesis...

  16. FIRST PRINCIPLES MODELING FOR LIDAR SENSING OF COMPLEX ICE SURFACES

    E-Print Network [OSTI]

    Kerekes, John

    FIRST PRINCIPLES MODELING FOR LIDAR SENSING OF COMPLEX ICE SURFACES J. Kerekes, A. Goodenough, S of monitoring the dynamics and mass balance of glaciers, ice caps, and ice sheets. However, it is also known that ice surfaces can have complex 3-dimensional structure, which can challenge their accurate retrieval

  17. Ice Sheets: Byrd Polar Outreach & Education February & March 2014 I would like to begin this month's newsletter with a word of thanks. About three weeks ago, I

    E-Print Network [OSTI]

    Howat, Ian M.

    was the recipient of a generous donation from Betsy Salt and her brother Jeffrey Salt in honor of their father on tours. The donation from the Salt family will allow us to install a first-rate station on the roof. Lastly, BPRC created a mobile exhibit on the ice core drilling program that we will take to Westerville

  18. Environmental Radioactivity in Greenland in 1981

    E-Print Network [OSTI]

    Ris«-R-471 v Environmental Radioactivity in Greenland in 1981 A. Aarkrog, Henning Dahlgaard, Elis July 1962 #12;Risø-R-471 ENVIRONMENTAL RADIOACTIVITY IN GREENLAND IN 1981 A. Aarkrog, Henning Dahlgaard. Measurements of fallout radioactivity in Greenland in 1981 are reported. Strontium-90 (and Cesium-137 in most

  19. Environmental Radioactivity in Greenland in 1978

    E-Print Network [OSTI]

    ·ft I la 0 0 0 0 Risn-R-405 Environmental Radioactivity in Greenland in 1978 A. Aarkrog, Heinz ENVIRONMENTAL RADIOACTIVITY IN GREENLAND IN 1978 A. Aarkrog, Heinz Hansen and J. Lippert Abstract. Heasureaents of fallout radioactivity in Greenland in 1978 are reported. Strontium-90 (and Cesium-137 in most cases

  20. Greenland Meadows LID Case Study: Economics

    E-Print Network [OSTI]

    Greenland Meadows LID Case Study: Economics Utilizing an LID approach that featured porous asphalt and a gravel wetland, a cost-competitive drainage system was designed for a large retail development. Greenland in Greenland, N.H. The development is located on a 56-acre parcel and includes three, one-story retail

  1. Melting of small Arctic ice caps observed from ERS scatterometer time series

    E-Print Network [OSTI]

    Smith, Laurence C.

    Melting of small Arctic ice caps observed from ERS scatterometer time series Laurence C. Smith,1 of melt onset can be observed over small ice caps, as well as the major ice sheets and multi-year sea ice for 14 small Arctic ice caps from 1992­2000. Interannual and regional variability in the timing of melt

  2. Integration Of Reflectance To Study Glacier Surface Using Landsat 7 ETM+: A Case Study Of The Petermann Glacier In Greenland

    E-Print Network [OSTI]

    Gilbes, Fernando

    Integration Of Reflectance To Study Glacier Surface Using Landsat 7 ETM+: A Case Study Of The Petermann Glacier In Greenland Félix O. Rivera Santiago Department Of Geology, University Of Puerto Rico, Mayaguez Campus, P.O. Box 9017 Mayaguez Puerto Rico,00681 Abstract- Glaciers are masses of ice and granular snow

  3. Bowhead whale springtime song off West Greenland Kathleen M. Stafford

    E-Print Network [OSTI]

    Laidre, Kristin L.

    Bowhead whale springtime song off West Greenland Kathleen M. Stafford Applied Physics Laboratory 98105 and Greenland Institute of Natural Resources, Box 570, DK-3900 Nuuk, Greenland M. P. Heide-Jørgensen Greenland Institute of Natural Resources, Box 570, DK-3900 Nuuk, Greenland Received 13 February 2008

  4. By simulating biogeochemical cycles, the Greenland ice sheet, and more--with reach to the lower thermosphere--this system gives the research community a flexible, state-of-the-

    E-Print Network [OSTI]

    climate variability and change. THE COMMUNITY EARTH SYSTEM MODEL A Framework for Collaborative Research in the CCSM4/CESM1 (version 1.0 of the Community Earth System Model) special collection of the Journal processes must be represented before a climate model becomes an Earth system model (ESM), but typically

  5. Recent glacially influenced sedimentary processes on the East Greenland continental slope and deep Greenland Basin

    E-Print Network [OSTI]

    Jakobsson, Martin

    Recent glacially influenced sedimentary processes on the East Greenland continental slope and deep Greenland Basin Marga García a,*, Julian A. Dowdeswell a , Gemma Ercilla b , Martin Jakobsson c a Scott June 2012 Available online xxx Keywords: Greenland Basin Glacially influenced sedimentary processes

  6. 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. ...

  7. A lattice model to simulate ice-structure interaction

    E-Print Network [OSTI]

    Boyer, Edmond

    A lattice model to simulate ice-structure interaction O. Dorival, A. V. Metrikine, A. Simone of Technology P. O. Box 5048, 2600 GA Delft, Netherlands Abstract The interaction between ice sheets, due to the complexity of ice material the use of small-scale experiments is problematic if one aims

  8. 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

  9. Glacial geology and glaciology of the Younger Dryas ice cap in Scotland 

    E-Print Network [OSTI]

    Golledge, Nicholas Robert

    2009-01-01T23:59:59.000Z

    This thesis uses geological field data and numerical ice sheet modelling to study the Younger Dryas ice cap in Scotland. The Younger Dryas stadial is important because it represents the most recent period of high-magnitude ...

  10. Radiocarbon Content of CO 2 Respired from High Arctic Tundra in Northwest Greenland

    E-Print Network [OSTI]

    Czimczik, Claudia I; Welker, Jeffrey M

    2010-01-01T23:59:59.000Z

    J. E. , 2002: Survey of Greenland instrumental temperaturetypes in northwestern Greenland. Arctic, Antarctic, andfen ecosystem in NE-Greenland. Theoretical and Applied

  11. Persistent multi-decadal Greenland temperature fluctuation through the last millennium

    E-Print Network [OSTI]

    Kobashi, Takuro; Severinghaus, Jeffrey P.; Barnola, Jean-Marc; Kawamura, Kenji; Carter, Tara; Nakaegawa, Tosiyuki

    2010-01-01T23:59:59.000Z

    Cappelen J (2006) Extending Greenland temper- ature recordssurface elevation at the Greenland summit. J Glaciol 48:199–hemisphere tempera- ture and Greenland temperature changed

  12. A metapopulation model for Canadian and West Greenland narwhals

    E-Print Network [OSTI]

    Laidre, Kristin L.

    A metapopulation model for Canadian and West Greenland narwhals M. P. Heide-Jørgensen1 , P. R. Richard2 , R. Dietz3 & K. L. Laidre4 1 Greenland Institute of Natural Resources, Nuuk, Greenland 2-Jørgensen, Greenland Institute of Natural Resources, Strandgade 91, 3, DK-1016 Copenhagen K, Denmark. Tel: +45 40257943

  13. INTRODUCTION Information on the abundance of large whales in Greenland

    E-Print Network [OSTI]

    Laidre, Kristin L.

    INTRODUCTION Information on the abundance of large whales in Greenland waters, including fin whales surveys were conducted in West Greenland by the Greenland Fisheries Research Institute (m/v Regina Maris when survey conditions are optimal in Greenlandic waters. Between 1983 and 1993, visual aerial surveys

  14. Greenland's Pressure Drag and the Atlantic Storm Track THOMAS JUNG

    E-Print Network [OSTI]

    Greenland's Pressure Drag and the Atlantic Storm Track THOMAS JUNG European Centre for Medium of Greenland on the Northern Hemisphere wintertime circulation are discussed. Inviscid pressure drag on Greenland's slopes, calculated from reanalysis data, is related to circulation patterns. Greenland lies

  15. 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

  16. 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

  17. Journal of Climate, 2005, Vol 18, p 2903-2921 Maintenance of the Sea-Ice Edge

    E-Print Network [OSTI]

    Bitz, Cecilia

    radiation is the largest component of the ocean energy budget, and the large seasonal range of insolation is known to expand in early winter roughly to the mean position of the ocean thermal front in the Greenland pole depends primarily on coastlines, ice motion, and the melt rate at the ice-ocean interface. At any

  18. Analysis of glacial earthquakes Victor C. Tsai1

    E-Print Network [OSTI]

    Tsai, Victor C.

    , the events cluster into seven regions, all of which correspond to regions of very high ice flow and most, Helheim Glacier, the southeast Greenland glaciers, the northwest Greenland glaciers, Rinks Isbrae that both the Greenland and Antarctic ice sheets are drained by narrow but fast moving features known as ice

  19. (Reduce uncertainty in projection of future sea-level change due to ice wastage)

    SciTech Connect (OSTI)

    Meier, M.F.

    1991-01-01T23:59:59.000Z

    Three basic goals were stated in the original proposal. These were: (1) develop an understanding of the heat and mass flow into subfreezing snow and firn, in order to model the evolution of the temperature distribution and the infiltration rates through the firn; (2) relate changes in climate, as given by general circulation model predictions, to changes in the surface mass and energy balances of glaciers; and (3) use the above results to analyze the effects of changed surface mass and energy balances on the flow of meltwater through snow and firn, and on the runoff from these glaciers, in a CO{sub 2}-affected climate. This final report summarizes our progress toward these goals. The primary product of this research program has been the communication of this progress in the form of publications in the scientific literature and presentations at scientific meetings. Our research activities in the past three years have provided a new basis for modeling of multiphase flow in subfreezing snow, new field data on the structural properties of arctic firn pertinent to hydrological modeling, and estimates of sea level change in response to changing patterns of runoff from the Greenland Ice Sheet. We conclude that forecasts of future sea level changes from all glacier runoff sources may be in error by amounts on the order of +8 cm over the next 150 years, due to the lag in generating runoff to the sea. Our specific research products include two distributed-parameter models of water flow through snow with melting and freezing, a theoretical model of wetting-front advance into subfreezing snow for inclusion in a future model, and a simple large-scale model of the response of Greenland runoff in a changing climate which provides estimates of the effect of melt water refreezing phenomena on sea level changes in response to a range of possible future climates.

  20. The Role of Snow and Ice in the Climate System

    SciTech Connect (OSTI)

    Barry, Roger (NSIDC) [NSIDC

    2007-12-19T23:59:59.000Z

    Global snow and ice cover (the 'cryosphere') plays a major role in global climate and hydrology through a range of complex interactions and feedbacks, the best known of which is the ice - albedo feedback. Snow and ice cover undergo marked seasonal and long term changes in extent and thickness. The perennial elements - the major ice sheets and permafrost - play a role in present-day regional and local climate and hydrology, but the large seasonal variations in snow cover and sea ice are of importance on continental to hemispheric scales. The characteristics of these variations, especially in the Northern Hemisphere, and evidence for recent trends in snow and ice extent are discussed.

  1. 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...

  2. Probing Fukushima with cosmic rays should help speed cleanup...

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

    cancer, anemia gleaned from ribosome research Complex systems influence melting of Greenland ice sheet Related Articles All Stories Rocket flight test at the Energetic Materials...

  3. Los Alamos laser selected for 2020 Mars mission

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

    cancer, anemia gleaned from ribosome research Complex systems influence melting of Greenland ice sheet Related Articles All Stories Simon Gerber, first author of the publication...

  4. Hydrodynamic experiment provides key data for Stockpile Stewardship

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

    cancer, anemia gleaned from ribosome research Complex systems influence melting of Greenland ice sheet Related Articles All Stories This is a time-lapse photograph of the Cosmic...

  5. World's largest single crystal of gold verified by Los Alamos...

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

    cancer, anemia gleaned from ribosome research Complex systems influence melting of Greenland ice sheet Related Articles All Stories Secure computing for the 'Everyman' goes to...

  6. Secure computing for the 'Everyman' goes to market

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

    cancer, anemia gleaned from ribosome research Complex systems influence melting of Greenland ice sheet Related Articles All Stories Scientists detect methane levels three times...

  7. Dark spaces could change the way we think about galaxies

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

    cancer, anemia gleaned from ribosome research Complex systems influence melting of Greenland ice sheet Related Articles All Stories The newly discovered rolling movement shown...

  8. Modeling convection in the Greenland Sea

    E-Print Network [OSTI]

    Bhushan, Vikas

    1998-01-01T23:59:59.000Z

    A detailed examination of the development of a deep convection event observed in the Greenland Sea in 1988-89 is carried out through a combination of modeling, scale estimates, and data analysis. We develop a prognostic ...

  9. doi: 10.1130/G32908.1 2012;40;627-630Geology

    E-Print Network [OSTI]

    Carlson, Anders

    and the effects of Greenland Ice Sheet (GIS) melting on climate over the coming millennium. While some climate., 2009). This sea-level highstand implies substantial melting of the Greenland Ice Sheet (GIS) (Northern the loss of Arctic glaciers and ice caps is included; Otto-Bliesner et al., 2006; Colville et al., 2011

  10. Multi-parameter estimation in glacier models with adjoint and algorithmic differentiation

    E-Print Network [OSTI]

    Davis, Andrew D. (Andrew Donaldson)

    2012-01-01T23:59:59.000Z

    The cryosphere is comprised of about 33 million km³ of ice, which corresponds to 70 meters of global mean sea level equivalent [30]. Simulating continental ice masses, such as the Antarctic or Greenland Ice Sheets, requires ...

  11. american selected papers: Topics by E-print Network

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

    DiscussionPaper|DiscussionPaper| Abstract The influence of a reduced Greenland ice sheet (GrIS) on Greenland's surface climate during the Eemian interglacial is studied using a...

  12. Climate Change and National Security

    E-Print Network [OSTI]

    Alyson, Fleming; Summer, Kelly; Summer, Martin; Lauren, Franck; Jonathan, Mark

    2015-01-01T23:59:59.000Z

    Global surface warming (0C) Assumes that the GHG concentration is stabilized at 2000 levelswarming over a long period would melt all of Greenland’s ice sheet, raising the global sea level

  13. Multiscale modeling of ice deformation behavior M. Montagnata,, O. Castelnaub, P. D. Bonsc, S. H. Fariad,e, O.

    E-Print Network [OSTI]

    Boyer, Edmond

    Multiscale modeling of ice deformation behavior M. Montagnata,, O. Castelnaub, P. D. Bonsc, S. H France (IUF), Paris, France Abstract Understanding the flow of ice in glaciers and polar ice sheets is of increasing relevance in a time of potentially significant climate change. The flow of ice has hitherto

  14. Antarctic ice sheet fertilises the Southern Ocean

    E-Print Network [OSTI]

    Death, R.

    Southern Ocean (SO) marine primary productivity (PP) is strongly influenced by the availability of iron in surface waters, which is thought to exert a significant control upon atmospheric CO2 concentrations on glacial/interglacial ...

  15. The whole world had a case of the ice age shivers

    SciTech Connect (OSTI)

    Kerr, R.A.

    1993-12-24T23:59:59.000Z

    There is now worldwide evidence of short-term increases in the earth's temperature during the last ice ages. This evidence comes from South American glaciers, Antarctic ice cores, and sediment cores from the tropical oceans, as well as Greenland ice cores. Researcher are unsure of the causes of these fluctuations. Some speculate a means for transmitting a climate signal from the North Atlantic to the rest of the world, while others look to some shorter-term version of the orbital variations that pace the cycle of the ice ages.

  16. Extending Greenland temperature records into the late eighteenth century

    E-Print Network [OSTI]

    Feigon, Brooke

    Extending Greenland temperature records into the late eighteenth century B. M. Vinther,1 K. K records for Greenland reach back to the late nineteenth century at a few sites. Combining early record back to the year 1784. The new extended Greenland temperature record is 9% incomplete. There are

  17. Greenland halibut (Reinhardtius hip-poglossoides (Walbaum)) is a deep-

    E-Print Network [OSTI]

    457 Greenland halibut (Reinhardtius hip- poglossoides (Walbaum)) is a deep- water flatfish of high perception of Greenland hali- but as a more free-swimming species than other flatfishes (Merrett and Haedrich. The perception that Greenland hal- ibut may be a pelagically distributed species has primarily been based

  18. Late Quaternary history of Washington Land, North Greenland OLE BENNIKE

    E-Print Network [OSTI]

    Ingólfsson, Ólafur

    Late Quaternary history of Washington Land, North Greenland OLE BENNIKE Bennike, O. 2002 (September): Late Quaternary history of Washington Land, North Greenland. Boreas, Vol. 31, 260­272. Oslo. ISSN 0300-9483. During the last glacial stage, Washington Land in western North Greenland was probably completely inun

  19. AbstractA total of 7244 Greenland halibut (Reinhardtius hippoglossoides,

    E-Print Network [OSTI]

    414 Abstract­A total of 7244 Greenland halibut (Reinhardtius hippoglossoides, Walbaum) were tagged in Greenland waters between 1986 and 1998 to in crease information on stock delinea tions, to clarify migration routes, and to describe the seasonal movements of fjord populations. At present 517 recaptured Greenland

  20. Epidemiology 69 Sander Greenland and Charles Poole1

    E-Print Network [OSTI]

    Gelman, Andrew

    Epidemiology 69 COMMENTARY Sander Greenland and Charles Poole1 accept that P values are here discussed, for example, by Greenland in 2011).2 The formal view of the P value as a probability conditional of the model). I find Greenland and Poole's1 perspective to be valuable: it is important to go beyond criticism

  1. STATE OF THE CLIMATE Jessica Blunden Derek S. Arndt

    E-Print Network [OSTI]

    and ice caps (outside Greenland); Greenland Ice Sheet; Permafrost; Lake ice; Sea ice; Ocean; and Ocean. Conversely, penetration of Arctic air masses into northern and eastern Europe in autumn 2010 and spring 2011 sectors of the Arctic Basin, upper ocean temperatures in summer 2011 were generally warmer than

  2. 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

  3. Interstellar Ices

    E-Print Network [OSTI]

    Boogert, A C A

    2003-01-01T23:59:59.000Z

    Currently ~36 different absorption bands have been detected in the infrared spectra of cold, dense interstellar and circumstellar environments. These are attributed to the vibrational transitions of ~17 different molecules frozen on dust grains. We review identification issues and summarize the techniques required to extract information on the physical and chemical evolution of these ices. Both laboratory simulations and line of sight studies are essential. Examples are given for ice bands observed toward high mass protostars, fields stars and recent work on ices in disks surrounding low mass protostars. A number of clear trends have emerged in recent years. One prominent ice component consists of an intimate mixture between H2O, CH3OH and CO2 molecules. Apparently a stable balance exists between low temperature hydrogenation and oxidation reactions on grain surfaces. In contrast, an equally prominent ice component, consisting almost entirely of CO, must have accreted directly from the gas phase. Thermal proc...

  4. Archimedean Ice

    E-Print Network [OSTI]

    Kari Eloranta

    2009-09-22T23:59:59.000Z

    The striking boundary dependency (the Arctic Circle phenomenon) exhibited in the ice model on the square lattice extends to other planar set-ups. We present these findings for the triangular and the Kagome lattices. Critical connectivity results guarantee that ice configurations can be generated using the simplest and most efficient local actions. Height functions are utilized throughout the analysis. At the end there is a surprise in store: on the remaining Archimedean lattice for which the ice model can be defined, the 3.4.6.4. lattice, the long range behavior is completely different from the other cases.

  5. 1302 VOLUME 16J O U R N A L O F C L I M A T E 2003 American Meteorological Society

    E-Print Network [OSTI]

    Box, Jason E.

    of Greenland Ice Sheet Surface Climate in the HIRHAM Regional Climate Model Using Automatic Weather Station Data JASON E. BOX Byrd Polar Research Center, The Ohio State University, Columbus, Ohio ANNETTE RINKE of Greenland ice sheet surface climate are made with the 0.5 -horizontal resolution HIRHAM regional climate

  6. Greenland-Pearl Causal Diagrams 2 November 2009 1 of 16 CAUSAL DIAGRAMS

    E-Print Network [OSTI]

    California at Los Angeles, University of

    Greenland-Pearl Causal Diagrams 2 November 2009 1 of 16 CAUSAL DIAGRAMS Sander Greenland Department #12;Greenland-Pearl Causal Diagrams 2 November 2009 2 of 16 Introduction From their inception

  7. Longpath DOAS observations of surface BrO at Summit, Greenland

    E-Print Network [OSTI]

    2011-01-01T23:59:59.000Z

    surface BrO at Summit, Greenland J. Stutz 1 , J. L. Thomasimpact of BrO at Summit, Greenland in 2007 and 2008, Atmos.of peroxy radicals at Summit, Greenland during summer 2003,

  8. MEDDELELSER OM GRNLAND BIOSCIENCE 53 2001 Hydroids of Greenland and Iceland

    E-Print Network [OSTI]

    Schuchert, Peter

    MEDDELELSER OM GRØNLAND · BIOSCIENCE 53 · 2001 Hydroids of Greenland and Iceland (Cnidaria, Hydrozoa) PETER SCHUCHERT #12;PETER SCHUCHERT. Hydroids of Greenland and Iceland (Cnidaria, Hydrozoa Meddelelser om Grønland Meddelelser om Grønland, which is Danish for Monographs on Greenland, has published

  9. Influence of large-scale teleconnection patterns on methane sulfonate ice core records in Dronning Maud Land

    E-Print Network [OSTI]

    Fischer, Hubertus

    temperature difference. This salt-based storage of heat at depth is analogous to Convectively Available). First widely recognized as more than climatic ``noise'' by the drilling of two deep Greenland summit ice coherent pattern of climate in- stability. Broecker first proposed that a ``salt oscillator

  10. Fact Sheet

    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 AdministrationField8,Dist. Category UC-lFederalFYRANDOM DRUG TESTINGFact Sheet The two

  11. Fact Sheet

    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. DOE Office of Science (SC) Environmental Assessments (EA)Budget » FY 2014FacilitiesSheet 300 Area 100-B,C

  12. Fact Sheet

    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. DOE Office of Science (SC) Environmental Assessments (EA)Budget » FY 2014FacilitiesSheet 300 Area 100-B,CPage |

  13. Fact Sheet

    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. DOE Office of Science (SC) Environmental Assessments (EA)Budget » FY 2014FacilitiesSheet 300 Area 100-B,CPage |

  14. Fact Sheet

    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. DOE Office of Science (SC) Environmental Assessments (EA)Budget » FY 2014FacilitiesSheet 300 Area 100-B,CPage

  15. Fact Sheets

    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. DOE Office of Science (SC) Environmental Assessments (EA)Budget » FY 2014FacilitiesSheet 300 AreaFACT

  16. Fact Sheets

    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. DOE Office of Science (SC) Environmental Assessments (EA)Budget » FY 2014FacilitiesSheet 300 AreaFACTFact

  17. area east greenland: Topics by E-print Network

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

    schemes and link to the Gateshead Cycling 35 Constraining MODIS snow albedo at large solar zenith angles: Implications for surface energy budget in Greenland Geosciences...

  18. SOME CHILLING CONSIDERATIONS ABOUT GLOBAL WARMING

    E-Print Network [OSTI]

    Schwartz, Stephen E.

    of Arizona #12;Weiss and Overpeck, University of Arizona #12;MELTING OF GREENLAND ICE CAP Satellite Complete melt of the Greenland ice sheet would raise the level of the global ocean 7 meters. #12 thousand years Polar ice cores #12;GREENHOUSE GAS FORCING AND CHANGE IN GLOBAL MEAN SURFACE TEMPERATURE

  19. Patchogue, New York February 25, 2009

    E-Print Network [OSTI]

    Schwartz, Stephen E.

    , University of Arizona #12;MELTING OF GREENLAND ICE CAP Satellite determination of extent of glacial melt 1992 vs 2002 4002,egdirbmaC,tnemssessAtcapmIetamilCcitcrA Complete melt of the Greenland ice sheet would Polar ice cores #12;GREENHOUSE GAS FORCING AND CHANGE IN GLOBAL MEAN SURFACE TEMPERATURE 1855-2004 -0

  20. CHILLING CONSIDERATIONS GLOBAL WARMING

    E-Print Network [OSTI]

    Schwartz, Stephen E.

    (millionsofsquarekilometers) 30 20 10 MELTING OF GREENLAND ICE CAP Satellite determination of maximum extent of glacial melt Complete melt of the Greenland ice sheet would raise the level of the global ocean 23 feet. ASAN Steffen IS INCREASING Global carbon dioxide concentration over the last thousand years Polar ice cores #12;Mann et al

  1. Iced Coffee Iced Yerba Mate "Tea"

    E-Print Network [OSTI]

    Iced Coffee Iced Yerba Mate "Tea" Iced Yerba Mate Latte Iced Chai Tea Latte Original, Green Tea Canned Soda Xing Tea Bottled Water Arizona Teas Energy Drinks Red Bull, SF Red Bull & Bing Jones Sodas $0 Cafe au Lait Hot Tea Yerba Mate "Tea" Yerba Mate Latte Chai Tea Latte - Original, Green Tea, or Sugar

  2. Fact Sheet Fact Sheet Fact Sheet Fact Sheet Fact Sheet Fact Sheet

    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 AdministrationField8,Dist. Category UC-lFederalFYRANDOM DRUG TESTINGFact Sheet The twoFact

  3. Fact Sheet Fact Sheet Fact Sheet Fact Sheet Fact Sheet Fact Sheet

    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 AdministrationField8,Dist. Category UC-lFederalFYRANDOM DRUG TESTINGFact Sheet The twoFactB

  4. Dynamometer Testing (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2010-11-01T23:59:59.000Z

    This fact sheet describes the dynamometer and its testing capabilities at the National Wind Technology Center.

  5. Abundance of narwhals (Monodon monoceros) on the hunting grounds in Greenland

    E-Print Network [OSTI]

    Laidre, Kristin L.

    Abundance of narwhals (Monodon monoceros) on the hunting grounds in Greenland M. P. HEIDE Greenland Institute of Natural Resources, Bok 570, 3900 Nuuk, Greenland (MPH, KLL, RGH) RUWPA, University to subsistence hunting by Inuit in Greenland and Canada. Scientific advice on the sustainable levels of removals

  6. Changes in the Dynamics of Marine-Terminating Outlet Glaciers in West Greenland (2000-2009)

    E-Print Network [OSTI]

    Howat, Ian M.

    Changes in the Dynamics of Marine-Terminating Outlet Glaciers in West Greenland (2000-2009) 1 2 3 of Greenland's marine-terminating outlet glaciers indicate a rapid and complex response to external forcing Greenland's northwestern margin, it is unclear whether west Greenland glaciers have undergone

  7. Greenland: 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: navigation, search OpenEI ReferenceJump to: navigation,IISrlMassachusetts: EnergyGreenland:

  8. Greenland New Energy | 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 directedAnnual Siteof Energy 2,AUDIT REPORTEnergyFarms A SUKHydrogen Company JumpGreenchoiceGreenland New

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

    E-Print Network [OSTI]

    Darby, Dennis

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

  10. Experimental Investigation of Direct Expansion Dynamic Ice-on-coil Storage System Used in Residential Buildings

    E-Print Network [OSTI]

    Zheng, M.; Kong, F.; Han, Z.; Liu, W.

    2006-01-01T23:59:59.000Z

    better heat exchanger ability caused by the larger surface of sheet ice, steady and low chilled water temperature was directly extracted from an ice storage tank. The longitudinal and axial fin-added coils improved the COP of the refrigerating unit...

  11. A radio air shower surface detector as an extension for IceCube and IceTop

    E-Print Network [OSTI]

    J. Auffenberg; T. Gaisser; K. Helbing; T. Huege; T. Karg; A. Karle

    2007-08-24T23:59:59.000Z

    The IceCube neutrino detector is built into the Antarctic ice sheet at the South Pole to measure high energy neutrinos. For this, 4800 photomultiplier tubes (PMTs) are being deployed at depths between 1450 and 2450 meters into the ice to measure neutrino induced charged particles like muons. IceTop is a surface air shower detector consisting of 160 Cherenkov ice tanks located on top of IceCube. To extend IceTop, a radio air shower detector could be built to significantly increase the sensitivity at higher shower energies and for inclined showers. As air showers induced by cosmic rays are a major part of the muonic background in IceCube, IceTop is not only an air shower detector, but also a veto to reduce the background in IceCube. Air showers are detectable by radio signals with a radio surface detector. The major emission process is the coherent synchrotron radiation emitted by e+ e- shower particles in the Earths magnetic field (geosynchrotron effect). Simulations of the expected radio signals of air showers are shown. The sensitivity and the energy threshold of different antenna field configurations are estimated.

  12. Rangeland Sheet 6 Soil Quality Information Sheet

    E-Print Network [OSTI]

    decomposition. Chemically stable organic matter gives soil its dark color and is generally the largest pool. Increasing levels of organic matter promote a higher water- holding capacity, which results in increasedRangeland Sheet 6 Soil Quality Information Sheet Rangeland Soil Quality--Organic Matter USDA

  13. Systems Integration (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2010-09-01T23:59:59.000Z

    The fact sheet summarizes the goals and activities of the DOE Solar Energy Technologies Program efforts within its photovoltaics subprogram.

  14. Photovoltaics (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2010-09-01T23:59:59.000Z

    The fact sheet summarizes the goals and activities of the DOE Solar Energy Technologies Program efforts within its photovoltaics subprogram.

  15. Photovoltaics (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2011-06-01T23:59:59.000Z

    The fact sheet summarizes the goals and activities of the DOE Solar Energy Technologies Program efforts within its photovoltaics subprogram.

  16. Gasoline Biodesulfurization Fact Sheet

    Broader source: Energy.gov [DOE]

    This petroleum industry fact sheet describes how biodesulfurization can yield lower sulfur gasoline at lower production costs.

  17. 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.

  18. 9 Place-names in north-west Greenland

    E-Print Network [OSTI]

    Leonard, Stephen Pax

    last updated on Monday, 4 April 2011 Accession Form for Individual Recordings: Collection / Collector Name Stephen Leonard Tape No. / Track / Item No. 9 Length of track 23 minutes Title of track Place-names in north-west Greenland Translation...

  19. 15 Dorti Peterson – life in north-west Greenland

    E-Print Network [OSTI]

    Leonard, Stephen Pax

    last updated on Monday, 4 April 2011 Accession Form for Individual Recordings: Collection / Collector Name Stephen Leonard Tape No. / Track / Item No. 15 Length of track 40 minutes Title of track Dorti Peterson – life in north-west Greenland...

  20. Extensional evolution of the central East Greenland Caledonides

    E-Print Network [OSTI]

    White, Arthur Percy, 1972-

    2001-01-01T23:59:59.000Z

    This thesis addresses the complexity of both syn- and post-orogenic extension in the overriding plate during Caledonian continental collision through field and laboratory investigations in the central East Greenland ...

  1. A New Model to Construct Ice Stream Surface Elevation Profiles and Calculate Contributions to Sea-Level Rise

    E-Print Network [OSTI]

    Adachi, Yosuke

    2012-01-01T23:59:59.000Z

    to 21st-Century Sea-Level Rise. Science, 321, 1340; DOI:in the Face of Sea-Level Rise: A Hybrid Modeling Approachof ice sheets to sea-level rise. Bibliography Alcamo, J. et

  2. How atmospheric ice forms | EMSL

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

    atmospheric ice forms How atmospheric ice forms Released: September 08, 2014 New insights into atmospheric ice formation could improve climate models This study advances our...

  3. Arctic ice islands

    SciTech Connect (OSTI)

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

    1988-01-01T23:59:59.000Z

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

  4. No Confinement Needed: Observation of a Metastable Hydrophobic Wetting Two-Layer Ice on Graphene

    SciTech Connect (OSTI)

    Kimmel, Gregory A.; Matthiesen, Jesper; Baer, Marcel; Mundy, Christopher J.; Petrik, Nikolay G.; Smith, R. Scott; Dohnalek, Zdenek; Kay, Bruce D.

    2009-09-09T23:59:59.000Z

    The structure of water at interfaces is crucial for processes ranging from photocatalysis to protein folding. Here, we investigate the structure and lattice dynamics of two-layer crystalline ice films grown on a hydrophobic substrate - graphene on Pt(111) - with low energy electron diffraction, reflection-absorption infrared spectroscopy, rare-gas adsorption/desorption, and ab-initio molecular dynamics. Unlike hexagonal ice, which consists of stacks of puckered hexagonal "bilayers", this new ice polymorph consists of two flat hexagonal sheets of water molecules in which the hexagons in each sheet are stacked directly on top of each other. Such two-layer ices have been predicted for water confined between hydrophobic slits, but not previously observed. Our results show that the two-layer ice forms even at zero pressure at a single hydrophobic interface by maximizing the number of hydrogen bonds at the expense of adopting a non-tetrahedral geometry with weakened bonds.

  5. The East Greenland Coastal Current : its structure, variability, and large-scale impact

    E-Print Network [OSTI]

    Sutherland, David A. (David Alan)

    2008-01-01T23:59:59.000Z

    The subtidal circulation of the southeast Greenland shelf is described using a set of high resolution hydrographic and velocity transects occupied in summer 2004. The main feature present is the East Greenland Coastal ...

  6. WindSat Polarimetric View of Greenland Peter Gaiser and 1

    E-Print Network [OSTI]

    Long, David G.

    WindSat Polarimetric View of Greenland 1 Li Li, 1 Peter Gaiser and 1 Elizabeth Twarog 1 Remote and observation geometry signatures, particularly over Greenland and Antarctic where the signatures are related-polarimetric microwavr radiometry; WindSat; snow; Greenland I. INTRODUCTION WindSat, launched in January 2003

  7. A numerical ocean circulation model of the Norwegian and Greenland Seas

    E-Print Network [OSTI]

    Stevens, David

    A numerical ocean circulation model of the Norwegian and Greenland Seas DAVID P STEVENS School of the Norwegian and Greenland Seas are investigated using a three-dimensional primitive equation ocean circulation and seasonally varying wind and thermohalme forcing. The connections of the Norwegian and Greenland Seas

  8. A new look at Southeast Greenland barrier winds and katabatic flow G.W.K. Moore

    E-Print Network [OSTI]

    Howat, Ian M.

    1 A new look at Southeast Greenland barrier winds and katabatic flow G.W.K. Moore Department; 2 Abstract: Southern Greenland is characterized by a number of high speed low-level weather systems that are all the result of the interaction of the topography of the Greenland with passing extra

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

    E-Print Network [OSTI]

    Response of the Greenland-Scotland overflow to changing deep water supply from the Arctic with a topographic barrier is used to study the response of the overflows across the Greenland-Scotland Ridge of the exchanges across the ridge is seen when the supply decreases. Transport variations in the East-Greenland

  10. Model simulation of Greenland Sea upper-ocean variability S. Hakkinen,1

    E-Print Network [OSTI]

    Zhang, Jinlun

    Model simulation of Greenland Sea upper-ocean variability S. Ha¨kkinen,1 F. Dupont,2 M. Karcher,3-ocean water masses coincides with periods of intense deep-water formation in the Greenland Sea. This paper-ocean properties observed in the Greenland Sea, including very dense, saline water masses in the 1950s, 1960s

  11. SPATIAL FACTOR ANALYSIS OF STREAM SEDIMENT GEOCHEMISTRY DATA FROM SOUTH GREENLAND

    E-Print Network [OSTI]

    SPATIAL FACTOR ANALYSIS OF STREAM SEDIMENT GEOCHEMISTRY DATA FROM SOUTH GREENLAND Allan A. Nielsen1 and Greenland, Thoravej 8, DK-2400 København NV, Denmark. ast@geus.dk SUMMARY This paper describes from South Greenland. Kriged MAF images are compared with kriged images based on varimax rotated

  12. Atmospheric circulation and cyclone frequency variations linked to the primary modes of Greenland snow accumulation

    E-Print Network [OSTI]

    Howat, Ian M.

    Atmospheric circulation and cyclone frequency variations linked to the primary modes of Greenland from 34 Greenland firn cores, extending from 1982 to 1996, are used to identify spatial accumulation component, representing west-central Greenland accumulation, is correlated to NAO variability, having

  13. Greenland's Island Rule and the Arctic Ocean circulation by Terrence M. Joyce1,2

    E-Print Network [OSTI]

    Joyce, Terrence M.

    Greenland's Island Rule and the Arctic Ocean circulation by Terrence M. Joyce1,2 and Andrey made for the flow around Greenland. Godfrey's theory has been extended to permit inclusion of Bering Archipelago in the modeled flow west of Greenland. In both models, the forcing has been applied in a quasi

  14. Field Metabolic Rate and PCB Adipose Tissue Deposition Efficiency in East Greenland Polar Bears Derived from

    E-Print Network [OSTI]

    Schierup, Mikkel Heide

    Field Metabolic Rate and PCB Adipose Tissue Deposition Efficiency in East Greenland Polar Bears metabolic rates (FMR) and CB153 deposition efficiencies in East Greenland polar bears. Our simulations Greenland polar bears. Citation: Pavlova V, Nabe-Nielsen J, Dietz R, Svenning J-C, Vorkamp K, et al. (2014

  15. Spatial variation in the influence of the North Atlantic Oscillation on precipitation across Greenland

    E-Print Network [OSTI]

    Howat, Ian M.

    Greenland Catherine A. Calder,1 Peter F. Craigmile,1 and Ellen Mosley-Thompson2,3 Received 27 July 2007-derived accumulation records from Greenland have been proposed as proxies for North Atlantic Oscillation (NAO Greenland were found to exhibit the strongest linear association with NAO. In this paper, we expand

  16. Chironomids as indicators of the Holocene climatic and environmental history of two lakes in Northeast Greenland

    E-Print Network [OSTI]

    Bern, Universität

    in Northeast Greenland STEFFI SCHMIDT, BERND WAGNER, OLIVER HEIRI, MARTIN KLUG, OLE BENNIKE AND MARTIN MELLES as indicators of the Holocene climatic and environmental history of two lakes in Northeast Greenland. Boreas sequences from arctic lakes on Store Koldewey, an island in Northeast Greenland, were investigated

  17. Abstract Southwest Greenland provides wintering grounds for 70% (~460,000) of the northern common

    E-Print Network [OSTI]

    Abstract Southwest Greenland provides wintering grounds for 70% (~460,000) of the northern common in the eastern Canadian Arctic and western Greenland (Abraham and Finney 1986; Boertmann et al. 1996; Merkel 2004a). All birds from western Greenland and most Canadian breeders, about 70% (463

  18. Upper-air temperatures around Greenland: 19642005 Jason E. Box1,2

    E-Print Network [OSTI]

    Howat, Ian M.

    Upper-air temperatures around Greenland: 1964­2005 Jason E. Box1,2 and Ariel E. Cohen2 Received 15 of 12h balloon soundings from six sites surrounding Greenland reveal distinct patterns of tropospheric-air temperatures around Greenland: 1964­ 2005, Geophys. Res. Lett., 33, L12706, doi:10.1029/ 2006GL025723. 1

  19. GEOLOGY, July 2008 539 The origin of the vertical motions of East Greenland is a long-

    E-Print Network [OSTI]

    Podladchikov, Yuri

    GEOLOGY, July 2008 539 ABSTRACT The origin of the vertical motions of East Greenland is a long uplift in central East Greenland. Because the North Atlantic is rimmed by young glacially carved mountain, Greenland, numerical modeling. INTRODUCTION The coastal landscapes of the fjords of the North Atlantic Ocean

  20. Fully corrected estimates of common minke whale abundance in West Greenland in 2007

    E-Print Network [OSTI]

    Laidre, Kristin L.

    Fully corrected estimates of common minke whale abundance in West Greenland in 2007 M.P. HEIDE West Greenland in August and September 2007. A total of 8,670km of survey effort covered 11 strata SURVEY; SATELLITE TAGGING; WEST GREENLAND minke whales to fully corrected total estimates of abundance

  1. Upper ocean T-S variations in the Greenland Sea and their association to climatic conditions

    E-Print Network [OSTI]

    Upper ocean T-S variations in the Greenland Sea and their association to climatic conditions Sirpa that the salinity variability in the central Greenland Gyre follows closely the sea level pressure (SLP) fluctuations found along the Greenland Coast, e.g., at Angmagssalik. Corresponding large-scale SLP field

  2. FOOD HABITS AND DAILY RATION OF GREENLAND HALIBUT, REINHARDTIUS HIPPOGLOSSOIDES, IN

    E-Print Network [OSTI]

    FOOD HABITS AND DAILY RATION OF GREENLAND HALIBUT, REINHARDTIUS HIPPOGLOSSOIDES, IN THE EASTERN BERING SEA M. S. YANG AND P. A. LIVINGSTON1 ABSTRACT This study shows that diet of Greenland halibut varies mainly by depth and size, and that size of prey fish increases as the Greenland halibut increases

  3. Neogene overflow of Northern Component Water at the Greenland-Scotland Ridge

    E-Print Network [OSTI]

    Samworth, Richard

    Neogene overflow of Northern Component Water at the Greenland-Scotland Ridge H. R. Poore Department counterpart Northern Component Water (NCW), across the Greenland-Scotland Ridge (GSR) is thought to have,280 words, 12 figures, 3 tables. Keywords: Northern Component Water; Greenland-Scotland Ridge; Iceland

  4. Deep convection in the Irminger Sea forced by the Greenland tip jet

    E-Print Network [OSTI]

    Pickart, Robert S.

    Deep convection in the Irminger Sea forced by the Greenland tip jet Robert S. Pickart*, Michael A atmospheric jet known as the Greenland tip jet, which forms periodically in the lee of Cape Farewell, Greenland, and is associated with elevated heat flux and strong wind stress curl. Using a history of tip

  5. Improving the precision of otolith-based age estimates for Greenland halibut

    E-Print Network [OSTI]

    643 Improving the precision of otolith-based age estimates for Greenland halibut (Reinhardtius estimates for Greenland halibut (Reinhardtius hip- poglossoides) have low precision, and there is general and Lyons, 1991). The latter is the primary cause of low pre- cision with Greenland halibut

  6. NORTHEASTERN NATURALIST2006 13(1):3538 Sea Lamprey Attached to a Greenland Shark in the

    E-Print Network [OSTI]

    Myers, Ransom A.

    NORTHEASTERN NATURALIST2006 13(1):35­38 Sea Lamprey Attached to a Greenland Shark in the St fork length, male Somniosus microcephalus (Greenland shark) on 9 October 2004 in Baie St. Pancrace, St observation of a sea lamprey attached to a Somniosus microcephalus (Bloch and Schneider) (Greenland shark

  7. A Greenland Sea Perspective on the Dynamics of Postconvective Eddies* K. I. C. OLIVER

    E-Print Network [OSTI]

    Stevens, David

    A Greenland Sea Perspective on the Dynamics of Postconvective Eddies* K. I. C. OLIVER School and 2) to provide a theoretical context for recent observations of SCVs in the Greenland Sea hundred days. These findings may explain the observed accumulation and longevity of SCVs at the Greenland

  8. Radar Sounding of Glaciers in Greenland C. Allen, B, Wohletz, and S, Gogineni

    E-Print Network [OSTI]

    Kansas, University of

    Radar Sounding of Glaciers in Greenland C. Allen, B, Wohletz, and S, Gogineni The University on several flights over Greenland glaciers during the summer of 1995. The radar data were collected the theory and present results of the homomorphic deconvolution procedure. INTRODUCTION The Greenland

  9. Natural mortality rate, annual fecundity, and maturity at length for Greenland halibut

    E-Print Network [OSTI]

    296 Natural mortality rate, annual fecundity, and maturity at length for Greenland halibut% ma- turity, and the rate of instantaneous natural mortality (M) by using GSI for Greenland halibut Greenland halibut (Reinhardtius hip- poglossoides) life history traits and to correctly assess the status

  10. Concentrations and Snow-Atmosphere Fluxes of Reactive Nitrogen at Summit, Greenland

    E-Print Network [OSTI]

    1 Concentrations and Snow-Atmosphere Fluxes of Reactive Nitrogen at Summit, Greenland J. W. Munger AT SUMMIT, GREENLAND 2 Abstract. Concentrations and fluxes of NOy (total reactive nitrogen), ozone concentra at Summit, Greenland. Median NOy concentrations declined from 947 ppt in May to 444 ppt by July. NOy fluxes

  11. The East Greenland Spill Jet* ROBERT S. PICKART, DANIEL J. TORRES, AND PAULA S. FRATANTONI

    E-Print Network [OSTI]

    Pickart, Robert S.

    The East Greenland Spill Jet* ROBERT S. PICKART, DANIEL J. TORRES, AND PAULA S. FRATANTONI Woods Greenland shelf break south of Denmark Strait have revealed an intense, narrow current banked against and entraining ambient water. The current has been named the East Greenland Spill Jet. It resides beneath

  12. AGE, GROWTH, AND SEXUAL MATURITY OF GREENLAND HALIBUT, REINHARDT/US lHPPOGLOSSOIDES (WALBAUM),

    E-Print Network [OSTI]

    AGE, GROWTH, AND SEXUAL MATURITY OF GREENLAND HALIBUT, REINHARDT/US lHPPOGLOSSOIDES (WALBAUM), IN THE CANADIAN NORTHWEST ATLANTIC W. R. BOWERIN01 ABSTRACT Age composition of Greenland halibut, Reinhardtius the slowest throughout the range. Onsetofmaturityoffemale Greenland halibutfrom the Gulfof

  13. Clean Cities Fact Sheet

    SciTech Connect (OSTI)

    Not Available

    2005-09-01T23:59:59.000Z

    This is a routine revision of a general fact sheet that describes the Clean Cities partnership efforts and includes a list of Clean Cities coordinators.

  14. MA 154 FORMULA SHEET

    E-Print Network [OSTI]

    delworth

    2006-01-07T23:59:59.000Z

    8/02. MA 154 FORMULA SHEET. ADDITION AND SUBTRACTION FORMULAS sin(u + v) = sinucosv + cosusinv sin(u? v) = sinucosv ? cosusinv cos(u + v) ...

  15. MA 15400 FORMULA SHEET

    E-Print Network [OSTI]

    User

    2011-11-07T23:59:59.000Z

    11/11. MA 15400 FORMULA SHEET. ADDITION AND SUBTRACTION FORMULAS sin(u + v) = sinucosv + cosusinv sin(u? v) = sinucosv ? cosusinv cos(

  16. Fact Sheet HEALTH SCIENCE

    E-Print Network [OSTI]

    Su, Xiao

    · Long Term Care Administrator · Training Coordinator · Clinical Health Education Specialist · Health Media Director · Long Term Care Facilities Manager Fact Sheet HEALTH SCIENCE Highlights · Health Science

  17. Market Acceleration (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2010-09-01T23:59:59.000Z

    The fact sheet summarizes the goals and activities of the DOE Solar Energy Technologies Program efforts within its market acceleration subprogram.

  18. Ice electrode electrolytic cell

    DOE Patents [OSTI]

    Glenn, David F. (Idaho Falls, ID); Suciu, Dan F. (Idaho Falls, ID); Harris, Taryl L. (Idaho Falls, ID); Ingram, Jani C. (Idaho Falls, ID)

    1993-01-01T23:59:59.000Z

    This invention relates to a method and apparatus for removing heavy metals from waste water, soils, or process streams by electrolytic cell means. The method includes cooling a cell cathode to form an ice layer over the cathode and then applying an electric current to deposit a layer of the heavy metal over the ice. The metal is then easily removed after melting the ice. In a second embodiment, the same ice-covered electrode can be employed to form powdered metals.

  19. Ice electrode electrolytic cell

    DOE Patents [OSTI]

    Glenn, D.F.; Suciu, D.F.; Harris, T.L.; Ingram, J.C.

    1993-04-06T23:59:59.000Z

    This invention relates to a method and apparatus for removing heavy metals from waste water, soils, or process streams by electrolytic cell means. The method includes cooling a cell cathode to form an ice layer over the cathode and then applying an electric current to deposit a layer of the heavy metal over the ice. The metal is then easily removed after melting the ice. In a second embodiment, the same ice-covered electrode can be employed to form powdered metals.

  20. A realistic freshwater forcing protocol for ocean-coupled climate models J. van den Berk a,

    E-Print Network [OSTI]

    a b s t r a c t A high-end scenario of polar ice loss from the Greenland and Antarctic ice sheet is presented with sepa- rate projections for different mass-loss sites up to the year 2100. For each large ice through melt of drifting ice- bergs. The location and relative magnitude of freshwater forcing due

  1. The historical global sea-level budget J.C. MOORE,1,2

    E-Print Network [OSTI]

    Moore, John

    -level contributions from glaciers and small ice caps, the Greenland ice sheet and thermosteric sea level are available unsurveyed high-latitude small glaciers and ice caps. The sea-level budget from 1850 is estimated using because it takes $50 times more energy to raise sea level by ocean heating than by ice melting (Trenberth

  2. Atmos. Chem. Phys., 10, 1164711680, 2010 www.atmos-chem-phys.net/10/11647/2010/

    E-Print Network [OSTI]

    Warren, Stephen

    , and the Arctic Ocean during 1998 and 2005­2009, on tun- dra, glaciers, ice caps, sea ice, frozen lakes for sampling. Sampling was carried out in summer on the Greenland Ice Sheet and on the Arctic Ocean, of melting Correspondence to: S. J. Doherty (sarahd@atmos.washington.edu) 7, melting sea ice 8, Arctic Canada 8, subarctic

  3. 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

  4. Frequently Asked Questions Frequently Asked Question 4.1

    E-Print Network [OSTI]

    and contribut- ing to sea level rise. The total contribution of glacier, ice cap and ice sheet melt to sea level of near- balance around 1970, this was followed by increased shrinkage. Melting of glaciers and ice caps and increased Greenland surface melting. Ice interacts with the surrounding climate in complex ways, so

  5. Predicting Land-Ice Retreat and Sea-Level Rise with the Community Earth System Model

    SciTech Connect (OSTI)

    Lipscomb, William [Los Alamos National Laboratory

    2012-06-19T23:59:59.000Z

    Coastal stakeholders need defensible predictions of 21st century sea-level rise (SLR). IPCC assessments suggest 21st century SLR of {approx}0.5 m under aggressive emission scenarios. Semi-empirical models project SLR of {approx}1 m or more by 2100. Although some sea-level contributions are fairly well constrained by models, others are highly uncertain. Recent studies suggest a potential large contribution ({approx}0.5 m/century) from the marine-based West Antarctic Ice Sheet, linked to changes in Southern Ocean wind stress. To assess the likelihood of fast retreat of marine ice sheets, we need coupled ice-sheet/ocean models that do not yet exist (but are well under way). CESM is uniquely positioned to provide integrated, physics based sea-level predictions.

  6. Amundsen Sea sea-ice variability, atmospheric circulation, and spatial variations in snow isotopic composition from new West Antarctic firn cores

    E-Print Network [OSTI]

    Criscitiello, Alison Sara

    2014-01-01T23:59:59.000Z

    Recent work has documented dramatic changes in the West Antarctic Ice Sheet (WAIS) over the past 30 years (e.g., mass loss, glacier acceleration, surface warming) due largely to the influence of the marine environment. ...

  7. 1 JANUARY 2004 21T O N I A Z Z O E T A L . 2004 American Meteorological Society

    E-Print Network [OSTI]

    Huybrechts, Philippe

    with preindustrial atmospheric greenhouse gas composition and with the Greenland ice sheet removed. Two separate pressure center that forces cyclone systems (and hence precipitation) to skirt along its sides with little

  8. LANL

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

    lost during the rise-240 gigatons, or roughly the amount that melts from the entire Greenland ice sheet each year. 6 1663 January 2015 At the same time, the Colorado River-which...

  9. Controversies Regarding the Holocene Sea-Level History of the Northwestern Gulf of Mexico

    E-Print Network [OSTI]

    California at Santa Barbara, University of

    islands, deltas, etc. Glacio-Hydro-Isostatic Models Rheology wrong? Ice sheet ½ size of Greenland grew and Rink, 2008 #12;Winds #12;Wind and Sedimentation Troiani, Simms, et al., in press #12;Paleowinds Troiani

  10. Microcomponent sheet architecture

    DOE Patents [OSTI]

    Wegeng, Robert S. (Richland, WA); Drost, M. Kevin (Richland, WA); McDonald, Carolyn E. (Richland, WA)

    1997-01-01T23:59:59.000Z

    The invention is a microcomponent sheet architecture wherein macroscale unit processes are performed by microscale components. The sheet architecture may be a single laminate with a plurality of separate microcomponent sections or the sheet architecture may be a plurality of laminates with one or more microcomponent sections on each laminate. Each microcomponent or plurality of like microcomponents perform at least one unit operation. A first laminate having a plurality of like first microcomponents is combined with at least a second laminate having a plurality of like second microcomponents thereby combining at least two unit operations to achieve a system operation.

  11. Microcomponent sheet architecture

    DOE Patents [OSTI]

    Wegeng, R.S.; Drost, M.K..; McDonald, C.E.

    1997-03-18T23:59:59.000Z

    The invention is a microcomponent sheet architecture wherein macroscale unit processes are performed by microscale components. The sheet architecture may be a single laminate with a plurality of separate microcomponent sections or the sheet architecture may be a plurality of laminates with one or more microcomponent sections on each laminate. Each microcomponent or plurality of like microcomponents perform at least one unit operation. A first laminate having a plurality of like first microcomponents is combined with at least a second laminate having a plurality of like second microcomponents thereby combining at least two unit operations to achieve a system operation. 14 figs.

  12. Conventional Hydropower Technologies (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2011-07-01T23:59:59.000Z

    This fact sheet describes the DOE Water Power Program's conventional hydropower research and development efforts.

  13. Community Wind Benefits (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2012-11-01T23:59:59.000Z

    This fact sheet explores the benefits of community wind projects, including citations to published research.

  14. STEP Intern Reference Check Sheet

    Broader source: Energy.gov [DOE]

    STEP Intern Reference Check Sheet, from the Tool Kit Framework: Small Town University Energy Program (STEP).

  15. antarctic ice sheet: Topics by E-print Network

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

    Engineering Websites Summary: is a geophysically - and in an age of growing concern about global warming, geopolitically - important portion of Earth. The composition and dynamics...

  16. antarctic ice sheets: Topics by E-print Network

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

    Engineering Websites Summary: is a geophysically - and in an age of growing concern about global warming, geopolitically - important portion of Earth. The composition and dynamics...

  17. Sandia Energy - Ice-Sheet Simulation Code Matures, Leveraging

    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:Energy: Grid Integration Redefining What's PossibleRadiationImplementing Nonlinear757 (1)Tara46EnergyPowerHighlights -

  18. Viscous fluid sheets

    E-Print Network [OSTI]

    Savva, Nikos

    2007-01-01T23:59:59.000Z

    We present a general theory for the dynamics of thin viscous sheets. Employing concepts from differential geometry and tensor calculus we derive the governing equations in terms of a coordinate system that moves with the ...

  19. Avian Fact Sheet

    SciTech Connect (OSTI)

    NWCC Wildlife Work Group

    2004-12-01T23:59:59.000Z

    OAK-B135 After conducting four national research meetings, producing a document guiding research: Metrics and Methods for Determining or Monitoring Potential Impacts on Birds at Existing and Proposed Wind Energy Sites, 1999, and another paper, Avian Collisions with Wind Turbines: A Summary of Existing Studies and Comparisons to Other Sources of Avian Collision Mortality in the United States, 2001, the subcommittee recognized a need to summarize in a short fact sheet what is known about avian-wind interaction and what questions remain. This fact sheet attempts to summarize in lay terms the result of extensive discussion about avian-wind interaction on land. This fact sheet does not address research conducted on offshore development. This fact sheet is not intended as a conclusion on the subject; rather, it is a summary as of Fall/Winter 2002.

  20. Technical Fact Sheets

    Broader source: Energy.gov [DOE]

    Technical Fact Sheets (TFS) provide summary-level information on the impact of new, deployed, applied, and/or planned technical approaches supporting EM cleanup projects.  The TFS is presented as a...

  1. Energy information sheets

    SciTech Connect (OSTI)

    NONE

    1995-07-01T23:59:59.000Z

    The National Energy Information Center (NEIC), as part of its mission, provides energy information and referral assistance to Federal, State, and local governments, the academic community, business and industrial organizations, and the public. The Energy Information Sheets was developed to provide general information on various aspects of fuel production, prices, consumption, and capability. Additional information on related subject matter can be found in other Energy Information Administration (EIA) publications as referenced at the end of each sheet.

  2. Biodiesel Basics (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2014-06-01T23:59:59.000Z

    This fact sheet provides a brief introduction to biodiesel, including a discussion of biodiesel blends, which blends are best for which vehicles, where to buy biodiesel, how biodiesel compares to diesel fuel in terms of performance, how biodiesel performs in cold weather, whether biodiesel use will plug vehicle filters, how long-term biodiesel use may affect engines, biodiesel fuel standards, and whether biodiesel burns cleaner than diesel fuel. The fact sheet also dismisses the use of vegetable oil as a motor fuel.

  3. Transporting Dry Ice

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

    Requirements for Shipping Dry Ice IATA PI 904 Source: Reg of the Day from ERCweb 2006 Environmental Resource Center | 919-469-1585 | webmaster@ercweb.com http:...

  4. Ice Drilling Gallonmilkjugs

    E-Print Network [OSTI]

    Saffman, Mark

    Ice Drilling Materials · Gallonmilkjugs · Syringes,largeand small · Pitchers · Spraybottles · 13x9? ·Isitbettertosquirtthewaterslowlyorasquicklyaspossible? ·Doestherateatwhichyousquirtthewaterchangethediameteroftheholes? ·Doesthetypeof`drill

  5. Sandia National Laboratories: ICED

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

    Paper Presented at American Society of Mechanical Engineers' (ASME) 2012 Internal Combustion Engine Division (ICED) Conference On August 28, 2013, in CRF, Energy, Energy...

  6. Mobile Ice Nucleus Spectrometer

    SciTech Connect (OSTI)

    Kulkarni, Gourihar R.; Kok, G. L.

    2012-05-07T23:59:59.000Z

    This first year report presents results from a computational fluid dynamics (CFD) study to assess the flow and temperature profiles within the mobile ice nucleus spectrometer.

  7. Spread of ice mass loss into northwest Greenland observed by GRACE and GPS

    E-Print Network [OSTI]

    Khan, Shfaqat Abbas; Wahr, John; Bevis, Michael; Velicogna, Isabella; Kendrick, Eric

    2010-01-01T23:59:59.000Z

    Geophys. J. Int. , 171(2), Peltier, W. R. (2004), Globaland VM2 viscosity profile of [Peltier, 2004]) to removeand VM2 viscosity profile [Peltier, 2004]. These predicted

  8. Technology Fact Sheets | Department of Energy

    Energy Savers [EERE]

    Fact Sheets Technology Fact Sheets This page contains links to fact sheets describing solid-state lighting, its characteristics, applications, and issues relating to its successful...

  9. Ice particle size matters | EMSL

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

    Ice particle size matters Ice particle size matters Released: May 04, 2014 Fine-tuning cloud models for improved climate predictions The Science Arctic clouds are widespread and...

  10. Upton, Long Island, New York April 4, 2011

    E-Print Network [OSTI]

    Schwartz, Stephen E.

    Increase Mote et al., 2005 #12;MELTING OF GREENLAND ICE CAP Satellite determination of maximum extent of glacial melt Complete melt of the Greenland ice sheet would raise the level of the global ocean 23 feet thousand years Polar ice cores #12;GLOBAL ANNUAL TEMPERATURE ANOMALY, 1880-2010 0.8 0.6 0.4 0.2 0.0 -0.2 -0

  11. Reionization on ice

    E-Print Network [OSTI]

    C. C. Dudley; M. Imanishi; P. R. Maloney

    2006-02-15T23:59:59.000Z

    The case for substantial far infrared ice emission in local ultraluminous infrared galaxies, expected based on the presence of mid-infrared ice absorption in their spectra and the known far infrared optical properties of ice, is still largely unsupported by direct observation owing to insufficient far infrared spectral coverage. Some marginal supportive evidence is presented here. A clear consequence of far infrared ice emission is the need to extend the range of redshifts considered for submillimeter sources. This is demonstrated via the example of HDF 850.1. The solid phase of the ISM during reionization may be dominated by ice, and this could lead to the presence of reionization sources in submillimeter source catalogs. Submillimeter sources not detected at 24 micron in the GOODS-N field are examined. Two candidate reionization sources are identified at 3.6 micron through possible Gunn-Peterson saturation in the Z band.

  12. Life Cycle of Sea-Ice Frazil, or grease ice

    E-Print Network [OSTI]

    Washington at Seattle, University of

    of Sea Ice away from surface, long crystals as congelation ice (frozen on from below) Brine Channels within the ice (~width of human hair) Brine rejected from ice (4-10psu), but concentrates in brine from AWI #12;Brine Volume and Salinity From Thomas and Dieckmann 2002, Science .... adapted from papers

  13. Very ice rich permafrost Moderately ice rich permafrost

    E-Print Network [OSTI]

    Ruess, Roger W.

    TK lake Very ice rich permafrost Permafrost forest Moderately ice rich permafrost Open Bog Open Fen characteristics (mainly ice content) and burn severity determine trajectories of ecosystem succession post in the presence of moderately ice rich permafrost but have high resilience only under low burn severity in very

  14. Ice Cream with a Heart Create a new Clemson Ice

    E-Print Network [OSTI]

    Duchowski, Andrew T.

    Ice Cream with a Heart Contest! Create a new Clemson Ice Cream flavor! Raise money for your favorite charity! Win a free Clemson Ice Cream party for your organization! Enter at www organizations. The contest is called Ice Cream with a Heart and its purpose is to help student organizations

  15. Energy information sheets

    SciTech Connect (OSTI)

    Not Available

    1993-12-02T23:59:59.000Z

    The National Energy Information Center (NEIC), as part of its mission, provides energy information and referral assistance to Federal, State, and local governments, the academic community, business and industrial organizations, and the general public. Written for the general public, the EIA publication Energy Information Sheets was developed to provide information on various aspects of fuel production, prices, consumption and capability. The information contained herein pertains to energy data as of December 1991. Additional information on related subject matter can be found in other EIA publications as referenced at the end of each sheet.

  16. Fact Sheet | Jefferson Lab

    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. DOE Office of Science (SC) Environmental Assessments (EA)Budget » FY 2014FacilitiesSheet 300 AreaFACT SHEETS

  17. Cambrian Agnostida of North America and Greenland, Part I, Ptychagnostidae

    E-Print Network [OSTI]

    Robison, Richard A.

    1984-06-08T23:59:59.000Z

    THE UNIVERSITY OF KANSAS PALEONTOLOGICAL CONTRIBUTIONS June 8, 1984 Paper 109 CAMBRIAN AGNOSTIDA OF NORTH AMERICA AND GREENLAND PART I, PTYCHAGNOSTIDAE' R. A. ROBISON Department of Geology, University of Kansas Lawrence, Kansas 66045 Abstract... D Z 38°-n 2 The University of Kansas Paleontological Contributions—Paper 109 ABUNDANCE, WIDE geographic distribution, and rapid evolution make agnostoid trilobites some of the best indices for global correlation of Cambrian strata. The value...

  18. This chapter describes observations of continuing change in the Arctic environmental system. It is or-

    E-Print Network [OSTI]

    Bhatt, Uma

    for the longest period and largest area of ice sheet melt since at least 1978, and the highest melt rate since in the Canadian Arctic, where the rate of mass loss from small glaciers and ice caps continued to increase system. It is or- ganized into five broad sections: atmosphere, ocean, sea ice cover, land, and Greenland

  19. J. Blunden, D. S. Arndt, and M. O. Baringer, Eds. Associate Eds. K. M.Willett,A. J. Dolman, B. D. Hall, P.W.Thorne, J. M. Levy, H. J. Diamond,

    E-Print Network [OSTI]

    . The warm air from the south was responsible for the longest period and largest area of ice sheet melt since small glaciers and ice caps continued to increase. At the circum-Arctic scale, with the exception, ocean, sea ice cover, land, and Greenland. The land section includes vegetation, permafrost, river

  20. Designing for effective stationkeeping in ice

    E-Print Network [OSTI]

    Nørvåg, Kjetil

    Designing for effective stationkeeping in ice CeSOS Highlights and AMOS Visions Conference DP Ice loads Ice #12;Effective stationkeeping in ice 1. Effective ship design. 2. An effective Ice Management system. 3. Effective strategies for the DP control system to compensate ice forces. #12;Ice

  1. Formula Sheet.pdf

    E-Print Network [OSTI]

    Nov 20, 2010 ... o Ú). EX 260:”. Í ] 2. w-x. 2 mmf. 5m. 260-x-y-2t. Formula Sheet. DeM0iVre's Law or Uniform. November 20, 2010. Wl. ÚJ-X. OStSminwwxß-y)

  2. Ethanol Basics (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2015-01-01T23:59:59.000Z

    Ethanol is a widely-used, domestically-produced renewable fuel made from corn and other plant materials. More than 96% of gasoline sold in the United States contains ethanol. Learn more about this alternative fuel in the Ethanol Basics Fact Sheet, produced by the U.S. Department of Energy's Clean Cities program.

  3. Neglecting ice-atmosphere interactions underestimates ice sheet melt in millennial-scale deglaciation simulations

    E-Print Network [OSTI]

    Pritchard, M. S.; Bush, A. B.; Marshall, S. J.

    2008-01-01T23:59:59.000Z

    Pergamon Press, New York. Peltier, W. R. (1985), The LAGEOSWu, P. , and W. R. Peltier (1982), Viscous gravitationalmodel based on Wu and Peltier [1982] and Peltier [1985]. A

  4. A TEX86 lake record suggests simultaneous shifts in temperature in Central Europe and Greenland during the last deglaciation

    E-Print Network [OSTI]

    Wehrli, Bernhard

    A TEX86 lake record suggests simultaneous shifts in temperature in Central Europe and Greenland years. The remarkable resemblance with the Greenland and regional stable oxygen isotope records suggests and Greenland during the last deglaciation, Geophys. Res. Lett., 40, 948­953, doi:10.1002/grl.50181. 1

  5. A case study of a Greenland lee cyclogenesis event and the subsequent spawning of a tip jet

    E-Print Network [OSTI]

    Pickart, Robert S.

    A case study of a Greenland lee cyclogenesis event and the subsequent spawning of a tip jet Carling: With elevations exceeding 2000m in height, Greenland's southern tip acts as a large barrier to storm systems traversing the North Atlantic. As a result of the interaction with Greenland, low-pressure systems located

  6. P. Schuchert 2001a. Hydroids of Greenland and Iceland (Cnidaria, Hydrozoa). Meddelelser om Grnland 53: 1-184.

    E-Print Network [OSTI]

    Schuchert, Peter

    P. Schuchert 2001a. Hydroids of Greenland and Iceland (Cnidaria, Hydrozoa). Meddelelser om Grønland Kramp (1949) page 42: the existence of the Greenlandic species Zyzzyzus robustus Petersen, 1990 was only noted after the typesetting of the manuscript. page 46: section Distribution: "esatern Greenland" should

  7. Climatological conditions for the subpolar North Atlantic during the field campaign of the Greenland Flow Distortion Experiment

    E-Print Network [OSTI]

    Pickart, Robert S.

    of the Greenland Flow Distortion Experiment G.W.K. Moore Department of Physics University of Toronto R.S. Pickart January 21, 2009 #12; 2 Abstract: Due to its high topography, Greenland results in significant to help document this flow distortion as part of the international research project called the Greenland

  8. Appendix S1 -A greener Greenland? Normand et al. Appendix S1: Study species and species occurrence data

    E-Print Network [OSTI]

    Zimmermann, Niklaus E.

    Appendix S1 - A greener Greenland? Normand et al. 1 Appendix S1: Study species and species as in one or several of the floristic provinces bordering Greenland (Fig. S1.1). The selection were based subspecies) was considered. The selected species were assigned maximum heights and Greenlandic species

  9. Ice Formation in Gas-Diffusion Layers

    E-Print Network [OSTI]

    Dursch, Thomas

    2013-01-01T23:59:59.000Z

    the University of California. Ice Formation in Gas-Diffusionsub-freezing conditions, ice forms in the gas-diffusionstrategies exist to prevent ice formation, there is little

  10. Constraining MODIS snow albedo at large solar zenith angles: Implications for surface energy budget in Greenland

    E-Print Network [OSTI]

    Zender, Charles

    Constraining MODIS snow albedo at large solar zenith angles: Implications for surface energy budget; Solar Zenith Angle; Greenland; Surface Energy Budget 2 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 plays a pivotal role in determining the surface energy balance of Greenland which, by virtue of its area

  11. Honda Civic fact sheet

    SciTech Connect (OSTI)

    NREL

    1999-05-01T23:59:59.000Z

    The U.S. Department of Energy (DOE) is promoting the use of alternative fuels and alternative fuel vehicles (AFVs). The National Renewable Energy Laboratory (NREL) has been directed to conduct projects to evaluate the performance and acceptability of light-duty AFVs. This fact sheet describes the test results on 1998 Honda Civics: one dedicated CNG and a gasoline model as closely matched as possible.

  12. Biomolecular Science (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2012-04-01T23:59:59.000Z

    A brief fact sheet about NREL Photobiology and Biomolecular Science. The research goal of NREL's Biomolecular Science is to enable cost-competitive advanced lignocellulosic biofuels production by understanding the science critical for overcoming biomass recalcitrance and developing new product and product intermediate pathways. NREL's Photobiology focuses on understanding the capture of solar energy in photosynthetic systems and its use in converting carbon dioxide and water directly into hydrogen and advanced biofuels.

  13. Issue Development sheet Example

    Broader source: Energy.gov [DOE]

    ISSUE DEVELOPMENT SHEET INFORMATION ONLY The information provided below indicates that a potential concern for finding has been identified. Please provide any objective evidence you may have that could either alleviate the concern or eliminate the finding. If no objective evidence is available/can be provided by the end of this audit (at the scheduled end of field work), this information will be included in the audit report and reported as a concern or an audit finding as appropriate.

  14. Ice Heating Up Cold Clouds | EMSL

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

    Ice Heating Up Cold Clouds Ice Heating Up Cold Clouds Released: October 04, 2011 In a heated battle, ice crystals win the competition for cloud water vapor The mighty cloud ice...

  15. Contrasting response of South Greenland glaciers to recent climatic change

    SciTech Connect (OSTI)

    Warren, C.R.; Glasser, N.F. (Univ. of Edinburgh, Scotland (United Kingdom))

    1992-05-01T23:59:59.000Z

    A unique geographical configuration of glaciers exists in the Narsarsuaq district of South Greenland. Two large outlet glaciers divide into seven distributaries, such that each glacier system has land-terminating, tidewater-calving, and fresh-water-calving termini. Despite a similar climatic regime, these seven glaciers have exhibited strongly contrasting terminal behavior in historical time, as shown by historical records, aerial photographs, and fieldwork in 1989. The behavior of the calving glaciers cannot be accounted for with reference solely to climatic parameters. The combination of iceberg calving dynamics and topographic control has partially decoupled them from climatic forcing such that their oscillations relate more closely to glaciodynamic than glacioclimatic factors.

  16. Greenland, New Hampshire: 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 are8COaBulkTransmissionSitingProcess.pdfGetec AG ContractingGreenOrder JumpIowa: Energy ResourcesInitiativeGreenland,

  17. Method for heating a glass sheet

    DOE Patents [OSTI]

    Boaz, Premakaran Tucker (Livonia, MI)

    1998-01-01T23:59:59.000Z

    A method for heating a glass sheet includes the steps of heating a glass sheet to a first predetermined temperature and applying microwave energy to the glass sheet to heat the glass sheet to at least a second predetermined temperature to allow the glass sheet to be formed.

  18. Method for heating a glass sheet

    DOE Patents [OSTI]

    Boaz, P.T.

    1998-07-21T23:59:59.000Z

    A method for heating a glass sheet includes the steps of heating a glass sheet to a first predetermined temperature and applying microwave energy to the glass sheet to heat the glass sheet to at least a second predetermined temperature to allow the glass sheet to be formed. 5 figs.

  19. Secure Data Center (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2012-08-01T23:59:59.000Z

    This fact sheet describes the purpose, lab specifications, applications scenarios, and information on how to partner with NREL's Secure Data Center at the Energy Systems Integration Facility.

  20. Lockheed Martin ESCO Qualification Sheet

    Broader source: Energy.gov [DOE]

    Document outlines the energy service company (ESCO) qualifications sheet for Lockheed Martin under the Department of Energy's (DOEs) energy savings performance contract (ESPC).

  1. Wind Energy Benefits (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2015-01-01T23:59:59.000Z

    This fact sheet outlines the top 10 benefits of wind energy, including cost, water savings, job creation, indigenous resource, and low operating costs.

  2. Schneider Electric ESCO Qualification Sheet

    Broader source: Energy.gov [DOE]

    Fact sheet outlines the energy service company (ESCO) qualifications for Schneider Electric in relation to the U.S. Department of Energy's (DOEs) energy savings performance contracts (ESPC).

  3. Modelling the viscoplastic behavior and the heterogeneous intracrystalline deformation of columnar ice polycrystals

    SciTech Connect (OSTI)

    Lebensohn, Ricardo A [Los Alamos National Laboratory; Montagnat, Maurine [LGGE (FRANCE); Mansuy, Philippe [MICHELIN (FRANCE); Duval, Paul [LGGE (FRANCE); Philip, A [LGGE (FRANCE)

    2008-01-01T23:59:59.000Z

    A full-field formulation based on Fast Fourier Transforms (FFT) has been adapted and used to predict the micromechanical fields that develop in columnar Ih ice polycrystals deforming in compression by dislocation creep. The predicted intragranular mechanical fields are in qualitative good agreement with experimental observations, in particular those involving the formation of shear and kink bands. These localization bands are associated with the large internal stresses that develop during creep in such anisotropic material, and their location, intensity, morphology and extension are found to depend strongly on the crystallographic orientation of the grains and on their interaction with neighbor crystals. The predictions of the model are also discussed in relation with the deformation of columnar sea and lake ice, and with the mechanical behavior of granular ice of glaciers and polar ice sheets, as well.

  4. Balance-sheet trends

    E-Print Network [OSTI]

    Cox, Gilford W

    1949-01-01T23:59:59.000Z

    on ths following two oppos1te pages) g5 The above tabulation indicates that the account fora 1s greatly favored+ Hose accountants think thst fros an analysis point of view the account fora is batter~ because when this fore is properly set ups 1t... the net redaction ?as hsought about. The "Staten?at of Legal Capital" sho?? the capital stock and surplus for the beginning of the accounting period, 44u+in "Bo %e Need a Balance SheetT", the Journal of Account vole Liight ppe 343 47m the pa+fit fram...

  5. Material Safety Data Sheet

    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 PowerCherries 82981-1cnHighand Retrievals from a New 183-GHzMAR Os2010Material Safety Data Sheet

  6. Fact Sheet LANS PNOV | Department of Energy

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

    Fact Sheet LANS PNOV Fact Sheet LANS PNOV April 15, 2011 Fact sheet for NNSA issuing Preliminary Notice of Violation to Los Alamos National Security, LLC, for Radiation Protection...

  7. Hail ice impact on composite structures at glancing angles

    E-Print Network [OSTI]

    Funai, Sho

    2012-01-01T23:59:59.000Z

    investigation of high velocity ice impacts on woven carbon/and ice sphere. .by trailing ice fragments. ..

  8. Metamaterial flexible sheets could transform optics

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

    Metamaterial flexible sheets could transform optics Metamaterial flexible sheets could transform optics Advances would boost security screening systems, infrared thermal cameras,...

  9. Fact Sheet: Better Buildings Residential Network | Department...

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

    Fact Sheet: Better Buildings Residential Network, increasing the number of American Homes that are energy efficient. doebbrnfactsheet.pdf More Documents & Publications Fact Sheet...

  10. Coevolution of continental ice cover and permafrost extent over the last glacial-interglacial cycle in North

    E-Print Network [OSTI]

    Peltier, W. Richard

    in North America Lev Tarasov1 and W. R. Peltier2 Received 14 August 2006; revised 20 March 2007; accepted both the most intense growth and recession phases. Citation: Tarasov, L., and W. R. Peltier (2007 of ice sheets across the North American continent [e.g., Tarasov and Peltier, 1999; Marshall et al., 2000

  11. Quaternary Science Reviews 25 (2006) 28942936 Severnaya Zemlya, Arctic Russia: a nucleation area for Kara Sea ice

    E-Print Network [OSTI]

    Möller, Per

    2006-01-01T23:59:59.000Z

    for Kara Sea ice sheets during the Middle to Late Quaternary Per Mo¨ llera,Ã, David J. Lubinskib , O´ lafur, 845 W. Taylor Street, Chicago, IL 60607-7059, USA e Department of Earth Sciences, University of Aarhus as a basis for modelling by Siegert and Dowdeswell (2004), has led to reconstructions of a substantially

  12. Contents Inquiry Sheet attached (Master Course: Blue sheet, Doctor Course: Light green sheet)

    E-Print Network [OSTI]

    Yamamoto, Hirosuke

    of energy and natural resources and the subsequent production of equally large amount of waste#12;#12; Contents Inquiry Sheet attached (Master Course: Blue sheet, Doctor Course: Light green and waste have lead to serious environmental contamination. The earth system be- comes increasingly

  13. Contents Inquiry Sheet attached (Master Course: Blue sheet, Doctor Course: Light green sheet)

    E-Print Network [OSTI]

    Yamamoto, Hirosuke

    1 #12;#12; Contents Inquiry Sheet attached (Master Course: Blue sheet, Doctor Course: Light green countries, long-term economic growth results in the consumption of a vast amount of energy and natural resources and the subsequent production of equally large amount of waste. In developing countries

  14. Image Content Engine (ICE)

    SciTech Connect (OSTI)

    Brase, J M

    2007-03-26T23:59:59.000Z

    The Image Content Engine (ICE) is being developed to provide cueing assistance to human image analysts faced with increasingly large and intractable amounts of image data. The ICE architecture includes user configurable feature extraction pipelines which produce intermediate feature vector and match surface files which can then be accessed by interactive relational queries. Application of the feature extraction algorithms to large collections of images may be extremely time consuming and is launched as a batch job on a Linux cluster. The query interface accesses only the intermediate files and returns candidate hits nearly instantaneously. Queries may be posed for individual objects or collections. The query interface prompts the user for feedback, and applies relevance feedback algorithms to revise the feature vector weighting and focus on relevant search results. Examples of feature extraction and both model-based and search-by-example queries are presented.

  15. Ice Cover on the Great Lakes NATIONALOCEANIC

    E-Print Network [OSTI]

    Ice Cover on the Great Lakes NATIONALOCEANIC AND ATMOSPHERIC ADMINISTRATION U.S. D EPARTMENT OF COMM ER CE Great Lakes Ice Cover facts since 1973 - 94.7% ice coverage in 1979 is the maximum on record - 9.5% ice coverage in 2002 is the lowest on record - 11.5% ice coverage in 1998, a strong El Nino

  16. Engineering Notes Ice Shape Characterization Using

    E-Print Network [OSTI]

    Tino, Peter

    Engineering Notes Ice Shape Characterization Using Self-Organizing Maps Stephen T. McClain Baylor. Introduction DURING the validation and verification of ice accretion codes, predicted ice shapes must be compared with experimental measurements of wind-tunnel or atmospheric ice shapes. Current methods for ice

  17. Hidden force floating ice

    E-Print Network [OSTI]

    Chang Q. Sun

    2015-01-17T23:59:59.000Z

    Because of the segmental specific-heat disparity of the hydrogen bond (O:H-O) and the Coulomb repulsion between oxygen ions, cooling elongates the O:H-O bond at freezing by stretching its containing angle and shortening the H-O bond with an association of larger O:H elongation, which makes ice less dense than water, allowing it to float.

  18. Ice Storm Supercomputer

    ScienceCinema (OSTI)

    None

    2013-05-28T23:59:59.000Z

    "A new Idaho National Laboratory supercomputer is helping scientists create more realistic simulations of nuclear fuel. Dubbed 'Ice Storm,' this 2048-processor machine allows researchers to model and predict the complex physics behind nuclear reactor behavior. And with a new visualization lab, the team can see the results of its simulations on the big screen." For more information about INL research, visit http://www.facebook.com/idahonationallaboratory.

  19. Ice Mass Balance Buoy: An Instrument to Measure and Attribute Changes in Ice Thickness

    E-Print Network [OSTI]

    Geiger, Cathleen

    Ice Mass Balance Buoy: An Instrument to Measure and Attribute Changes in Ice Thickness Jacqueline A the Ice Mass Balance buoy (IMB) in response to the need for monitoring changes in the thickness of the Arctic sea ice cover. The IMB is an autonomous, ice-based system. IMB buoys provide a time series of ice

  20. Microcomponent chemical process sheet architecture

    DOE Patents [OSTI]

    Wegeng, R.S.; Drost, M.K.; Call, C.J.; Birmingham, J.G.; McDonald, C.E.; Kurath, D.E.; Friedrich, M.

    1998-09-22T23:59:59.000Z

    The invention is a microcomponent sheet architecture wherein macroscale unit processes are performed by microscale components. The sheet architecture may be a single laminate with a plurality of separate microcomponent sections or the sheet architecture may be a plurality of laminates with one or more microcomponent sections on each laminate. Each microcomponent or plurality of like microcomponents perform at least one chemical process unit operation. A first laminate having a plurality of like first microcomponents is combined with at least a second laminate having a plurality of like second microcomponents thereby combining at least two unit operations to achieve a system operation. 26 figs.

  1. Microcomponent chemical process sheet architecture

    DOE Patents [OSTI]

    Wegeng, Robert S. (Richland, WA); Drost, M. Kevin (Richland, WA); Call, Charles J. (Pasco, WA); Birmingham, Joseph G. (Richland, WA); McDonald, Carolyn Evans (Richland, WA); Kurath, Dean E. (Benton County, WA); Friedrich, Michele (Prosser, WA)

    1998-01-01T23:59:59.000Z

    The invention is a microcomponent sheet architecture wherein macroscale unit processes are performed by microscale components. The sheet architecture may be a single laminate with a plurality of separate microcomponent sections or the sheet architecture may be a plurality of laminates with one or more microcomponent sections on each laminate. Each microcomponent or plurality of like microcomponents perform at least one chemical process unit operation. A first laminate having a plurality of like first microcomponents is combined with at least a second laminate having a plurality of like second microcomponents thereby combining at least two unit operations to achieve a system operation.

  2. Greenland temperature, climate change, and human society during the last 11,600 years

    E-Print Network [OSTI]

    Kobashi, Takuro

    2007-01-01T23:59:59.000Z

    temperature reconstruction from water isotopes in ice cores.temperature reconstruction from water isotopes in ice cores,Finkel, Changes in deep-water formation during the Younger

  3. Biochemical Conversion Pilot Plant (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2012-06-01T23:59:59.000Z

    This fact sheet provides information about Biochemical Conversion Pilot Plant capabilities and resources at NREL.

  4. Biomass Surface Characterization Laboratory (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2012-04-01T23:59:59.000Z

    This fact sheet provides information about Biomass Surface Characterization Laboratory capabilities and applications at NREL.

  5. Superfund fact sheet: The removal program. Fact sheet

    SciTech Connect (OSTI)

    Not Available

    1992-09-01T23:59:59.000Z

    The fact sheet describes the Superfund Emergency Response Program, a program specifically designed to respond to multi-media hazardous materials accidents (e.g. illegal disposal or improper handling of materials, transportation accidents, chemical fires) that endanger people and/or the environment. Explanations of how the removal program works and how the affected communities are involved are given. The fact sheet is one in a series providing reference information about Superfund issues and is intended for readers with no scientific training.

  6. NREL Showcases Hydrogen Internal Combustion Engine Bus, Helps DOE Set Standards for Outreach (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2010-11-01T23:59:59.000Z

    This fact sheet describes the National Renewable Energy Laboratory's (NREL's) accomplishments in showcasing a Ford hydrogen-powered internal combustion engine (H2ICE) bus at The Taste of Colorado festival in Denver. NREL started using its U.S. Department of Energy-funded H2ICE bus in May 2010 as the primary shuttle vehicle for VIP visitors, members of the media, and new employees. In September 2010, NREL featured the bus at The Taste of Colorado. This was the first major outreach event for the bus. NREL's educational brochure, vehicle wrap designs, and outreach efforts serve as a model for other organizations with DOE-funded H2ICE buses. Work was performed by the Hydrogen Education Group and Market Transformation Group in the Hydrogen Technologies and Systems Center.

  7. The influence of air temperature inversions on snowmelt and glacier mass-balance simulations, Ammassalik island, SE Greenland

    SciTech Connect (OSTI)

    Mernild, Sebastian Haugard [Los Alamos National Laboratory; Liston, Glen [COLORADO STATE UNIV.

    2009-01-01T23:59:59.000Z

    In many applications, a realistic description of air temperature inversions is essential for accurate snow and glacier ice melt, and glacier mass-balance simulations. A physically based snow-evolution modeling system (SnowModel) was used to simulate eight years (1998/99 to 2005/06) of snow accumulation and snow and glacier ice ablation from numerous small coastal marginal glaciers on the SW-part of Ammassalik Island in SE Greenland. These glaciers are regularly influenced by inversions and sea breezes associated with the adjacent relatively low temperature and frequently ice-choked fjords and ocean. To account for the influence of these inversions on the spatiotemporal variation of air temperature and snow and glacier melt rates, temperature inversion routines were added to MircoMet, the meteorological distribution sub-model used in SnowModel. The inversions were observed and modeled to occur during 84% of the simulation period. Modeled inversions were defined not to occur during days with strong winds and high precipitation rates due to the potential of inversion break-up. Field observations showed inversions to extend from sea level to approximately 300 m a.s.l., and this inversion level was prescribed in the model simulations. Simulations with and without the inversion routines were compared. The inversion model produced air temperature distributions with warmer lower elevation areas and cooler higher elevation areas than without inversion routines due to the use of cold sea-breeze base temperature data from underneath the inversion. This yielded an up to 2 weeks earlier snowmelt in the lower areas and up to 1 to 3 weeks later snowmelt in the higher elevation areas of the simulation domain. Averaged mean annual modeled surface mass-balance for all glaciers (mainly located above the inversion layer) was -720 {+-} 620 mm w.eq. y{sup -1} for inversion simulations, and -880 {+-} 620 mm w.eq. y{sup -1} without the inversion routines, a difference of 160 mm w.eq. y{sup -1}. The annual glacier loss for the two simulations was 50.7 x 10{sup 6} m{sup 3} y{sup -1} and 64.4 x 10{sup 6} m{sup 3} y{sup -1} for all glaciers - a difference of {approx}21%. The average equilibrium line altitude (ELA) for all glaciers in the simulation domain was located at 875 m a.s.l. and at 900 m a.s.l. for simulations with or without inversion routines, respectively.

  8. 701xml UCMG_A_385772 May 5, 2009 9:51 Coastal Management, 37:138, 2009

    E-Print Network [OSTI]

    Firestone, Jeremy

    global warming the most important29 environmental issue, symbolized by the melting of sea-ice in the Arctic Ocean and ac-30 celerating loss of the Greenland ice sheet. Global warming has thus become or electricity. Strong and growing demand strains existing energy25 infrastructure, congesting transmission

  9. 2, 383397, 2008 Extreme surface melt

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    surface snowmelt over high elevations (above 2000 m) of the Greenland ice sheet during summer of 2007Pa atmospheric thick- ness, and the net surface energy flux, linked in turn to southerly airflow over the ice10 Scanning Multichannel Microwave Radiometer (SMMR, 1979­1987) and the Special Sensor Microwave/Imager (SSM

  10. Cell Data Sheet Specification (Presentation)

    SciTech Connect (OSTI)

    Kurtz, S.

    2012-03-01T23:59:59.000Z

    The presentation shows a brief status report on the development of a specification being considered by IEC TC82 WG7 for a concentrator cell data sheet and solicits suggestions from the community.

  11. Concentrating Solar Power (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2010-08-01T23:59:59.000Z

    Fact sheet describing the overall capabilities of the NREL CSP Program: collector/receiver characterization, advanced reflector and absorber materials, thermal storage and advanced heat transfer fluids, and CSP modeling and analysis.

  12. ICE Pulse Oximeter Smart Alarm App Requirements

    E-Print Network [OSTI]

    Huth, Michael

    ICE Pulse Oximeter Smart Alarm App Requirements 6 March 2012 Revision 0 for an Integrated Clinical Environment (ICE) pulse oximetry monitoring app that provides.2 References [Purpose: List all ICE standards, and other standards and references

  13. ICE Raids: Compounding Production, Contradiction, and Capitalism

    E-Print Network [OSTI]

    Reas, Elizabeth I

    2009-01-01T23:59:59.000Z

    is just a cheap way of boosting ICE ‘criminal alien’ arrestRegardless of whether or not ICE is motivated by maintainingWorkers in America: Factories and ICE Raids Produce Citizens

  14. Energy information sheets, September 1996

    SciTech Connect (OSTI)

    NONE

    1996-09-01T23:59:59.000Z

    The National Energy Information Center (NEIC), as part of its mission, provides energy information and referral assistance to Federal, State, and local governments, the academic community, business and industrial organizations, and the public. The Energy Information Sheets was developed to provide general information on various aspects of fuel production, prices, consumption, and capability. Additional information on related subject matter can be found in other Energy Information Administration (EIA) publications as referenced at the end of each sheet.

  15. Energy information sheets, July 1998

    SciTech Connect (OSTI)

    NONE

    1998-07-01T23:59:59.000Z

    The National Energy Information Center (NEIC), as part of its mission, provides energy information and referral assistance to Federal, State, and local governments, the academic community, business and industrial organizations, and the public. The Energy Information Sheets was developed to provide general information on various aspects of fuel production, prices, consumption, and capability. Additional information on related subject matter can be found in other Energy Information Administration (EIA) publications as referenced at the end of each sheet.

  16. Horizontal electromagnetic casting of thin metal sheets

    DOE Patents [OSTI]

    Hull, John R. (Hinsdale, IL); Lari, Robert J. (Aurora, IL); Praeg, Walter F. (Palos Park, IL); Turner, Larry R. (Naperville, IL)

    1987-01-01T23:59:59.000Z

    Thin metal sheets are cast by magnetically suspending molten metal deposited within a ferromagnetic yoke and between AC conducting coils and linearly displacing the magnetically levitated liquid metal while it is being cooled to form a solid metal sheet. Magnetic flux increases as the molten metal sheet moves downward and decreases as the molten metal sheet moves upward to stabilize the sheet and maintain it in equilibrium as it is linearly displaced and solidified by cooling gases. A conducting shield is electrically coupled to the molten metal sheet by means of either metal sheet engaging rollers or brushes on the solidified metal, and by means of an electrode in the vessel containing the molten metal thereby providing a return path for the eddy currents induced in the metal sheet by the AC coil generated magnetic flux. Variation in the geometry of the conducting shield allows the magnetic flux between the metal sheet and the conducting shield to be varied and the thickness in surface quality of the metal sheet to be controlled. Side guards provide lateral containment for the molten metal sheet and stabilize and shape the magnetic field while a leader sheet having electromagnetic characteristics similar to those of the metal sheet is used to start the casting process and precedes the molten metal sheet through the magnet and forms a continuous sheet therewith. The magnet may be either U-shaped with a single racetrack coil or may be rectangular with a pair of facing bedstead coils.

  17. Horizontal electromagnetic casting of thin metal sheets

    DOE Patents [OSTI]

    Hull, John R. (Hinsdale, IL); Lari, Robert J. (Aurora, IL); Praeg, Walter F. (Palos Park, IL); Turner, Larry R. (Naperville, IL)

    1988-01-01T23:59:59.000Z

    Thin metal sheets are cast by magnetically suspending molten metal deposited within a ferromagnetic yoke and between AC conducting coils and linearly displacing the magnetically levitated liquid metal while it is being cooled to form a solid metal sheet. Magnetic flux increases as the molten metal sheet moves downward and decreases as the molten metal sheet moves upward to stabilize the sheet and maintain it in equilibrium as it is linearly displaced and solidified by cooling gases. A conducting shield is electrically coupled to the molten metal sheet by means of either metal sheet engaging rollers or brushes on the solidified metal, and by means of an electrode in the vessel containing the molten metal thereby providing a return path for the eddy currents induced in the metal sheet by the AC coil generated magnetic flux. Variation in the geometry of the conducting shield allows the magnetic flux between the metal sheet and the conducting shield to be varied and the thickness in surface quality of the metal sheet to be controlled. Side guards provide lateral containment for the molten metal sheet and stabilize and shape the magnetic field while a leader sheet having electromagnetic characteristics similar to those of the metal sheet is used to start the casting process and precedes the molten metal sheet through the magnet and forms a continuous sheet therewith. The magnet may be either U-shaped with a single racetrack coil or may be rectangular with a pair of facing bedstead coils.

  18. Therapeutic Hypothermia: Protective Cooling Using Medical Ice...

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

    Therapeutic Hypothermia: Protective Cooling Using Medical Ice Slurry Technology available for licensing: Proprietary method and equipment for making an ice slurry coolant to induce...

  19. Sandia National Laboratories: critical marginal ice zone

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

    marginal ice zone NASA Award for Marginal Ice Zone Observations and Process Experiment (MIZOPEX) On February 24, 2015, in Analysis, Climate, Modeling & Analysis, Monitoring, News,...

  20. Sandia National Laboratories: Marginal Ice Zone Observations...

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

    Marginal Ice Zone Observations and Processes Experiment mission Sierra Unmanned Aerial Vehicle to Begin Flights Over Arctic Sea Ice On July 25, 2013, in Climate, Customers &...

  1. Sandia National Laboratories: Arctic sea ice

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

    Arctic sea ice Sierra Unmanned Aerial Vehicle to Begin Flights Over Arctic Sea Ice On July 25, 2013, in Climate, Customers & Partners, Global, Monitoring, News, News & Events,...

  2. ARM - Ice Cores

    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 for4,645 3,625 1,006Datastreamstwrcam40m DocumentationJanuary 9, 2009 [Events, FeatureListGeneralPastIce Cores Outreach Home Room

  3. ARM - Measurement - Ice nuclei

    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 for4,645 3,625govInstrumentstdmadap Documentation TDMADAP : XDC documentationBarrow,ice particleSize Distributiontypes ARMnuclei

  4. Dynamics of ice shelf rift propagation and iceberg calving inferred from geodetic and seismic observations

    E-Print Network [OSTI]

    Bassis, Jeremy N.

    2007-01-01T23:59:59.000Z

    2. Ice Shelves . . . . . . . . . . . . . . . . .5. Ice Rheology . . . . . . . . . . . . . 6.vi Calving Glaciers and Ice

  5. MEAT, POULTRY, Still contains ice

    E-Print Network [OSTI]

    Liskiewicz, Maciej

    MEAT, POULTRY, SEAFOOD Still contains ice crystals and feels as cold, and ground meats Refreeze Discard Poultry and ground poultry Refreeze Discard Variety meats may safely re-freeze foods that s:ll contain ice crystals or that have been

  6. PRESS RELEASE I PARIS I 24 AOUT 2014 Tropical glaciers have responded to episodes of cooling in Greenland and the Antarctic

    E-Print Network [OSTI]

    van Tiggelen, Bart

    in Greenland and the Antarctic over the past 20,000 years, according to a study carried out mainly glaciers are found) show that these glaciers expanded not only during cooling over Greenland (12,000 years Reversal, or ACR), while temperatures in Greenland were relatively warm. In contrast, the following period

  7. Correcting the MODIS snow albedo bias in Greenland based on in situ GC-Net measurements: Implications for the surface energy budget

    E-Print Network [OSTI]

    Zender, Charles

    Correcting the MODIS snow albedo bias in Greenland based on in situ GC-Net measurements). We have documented a systematic negative bias for SZA>55-60° in Greenland. This study uses in situ data from the Greenland Climate Network (GC-Net) to characterize and empirically correct the MODIS snow

  8. The impact of Greenland on the predictability of European weather systems Supervisors: Sue Gray (U. Reading), Ian Renfrew (U. East Anglia) and Richard Swinbank (Met

    E-Print Network [OSTI]

    Renfrew, Ian

    The impact of Greenland on the predictability of European weather systems Supervisors: Sue Gray (U-to-high latitude of Greenland means it has a major influence on the atmospheric circulation of the North Atlantic by the presence of Greenland as is the atmosphere well downstream, for example over the British Isles

  9. Manufacturing Laboratory (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2011-10-01T23:59:59.000Z

    This fact sheet describes the purpose, lab specifications, applications scenarios, and information on how to partner with NREL's Manufacturing Laboratory at the Energy Systems Integration Facility. The Manufacturing Laboratory at NREL's Energy Systems Integration Facility (ESIF) focuses on developing methods and technologies that will assist manufacturers of hydrogen and fuel cell technologies, as well as other renewable energy technologies, to scale up their manufacturing capabilities to volumes that meet DOE and industry targets. Specifically, the manufacturing activity is currently focused on developing and validating quality control techniques to assist manufacturers of low temperature and high temperature fuel cells in the transition from low to high volume production methods for cells and stacks. Capabilities include initial proof-of-concept studies through prototype system development and in-line validation. Existing diagnostic capabilities address a wide range of materials, including polymer films, carbon and catalyst coatings, carbon fiber papers and wovens, and multi-layer assemblies of these materials, as well as ceramic-based materials in pre- or post-fired forms. Work leading to the development of non-contact, non-destructive techniques to measure critical dimensional and functional properties of fuel cell and other materials, and validation of those techniques on the continuous processing line. This work will be supported by materials provided by our partners. Looking forward, the equipment in the laboratory is set up to be modified and extended to provide processing capabilities such as coating, casting, and deposition of functional layers, as well as associated processes such as drying or curing. In addition, continuous processes are used for components of organic and thin film photovoltaics (PV) as well as battery technologies, so synergies with these important areas will be explored.

  10. Pollution Transport From North America to Greenland During Summer 2008

    SciTech Connect (OSTI)

    Thomas, J. L.; Raut, Jean-Christophe; Law, K. S.; Marelle, L.; Ancellet, G.; Ravetta, F.; Fast, Jerome D.; Pfister, G.; Emmons, L.; Diskin, G. S.; Weinheimer, Andrew J.; Roiger, A.; Schlager, H.

    2013-04-10T23:59:59.000Z

    Ozone pollution transported to the Arctic is a significant concern because of the rapid, enhanced warming in high northern latitudes, which is caused, in part, by short lived climate forcers, such as ozone. Long range transport of pollution contributes to background and episodic ozone levels in the Arctic. However, the extent to which plumes are photochemically active during transport, particularly during the summer, is uncertain. Regional chemical transport model simulations are used to examine photochemical production of ozone in air masses originating from boreal fire and anthropogenic emissions over North America and during their transport toward the Arctic during early July 2008. Model results shows good agreement with aircraft data collected over boreal fire source regions in Canada and several days downwind over Greenland during the study period. Pollutant plumes were transported east and north towards the Arctic and show significant ozone enhancements downwind of source regions. Anthropogenic plumes were more photochemically active than fire plumes. Together, both sources made an important contribution to ozone in pollution plumes transported to the Arctic.

  11. Pollution transport from North America to Greenland during summer 2008

    SciTech Connect (OSTI)

    Thomas, J. L.; Raut, Jean-Christophe; Law, K. S.; Marelle, L.; Ancellet, G.; Ravetta, F.; Fast, Jerome D.; Pfister, G.; Emmons, L.; Diskin, G. S.; Weinheimer, Andrew J.; Roiger, A.; Schlager, H.

    2013-04-10T23:59:59.000Z

    Ozone pollution transported to the Arctic is a significant concern because of the rapid, enhanced warming in high northern latitudes, which is caused, in part, by short lived climate forcers, such as ozone. Long range transport of pollution contributes to background and episodic ozone levels in the Arctic. However, the extent to which plumes are photochemically active during transport, particularly during the summer, is uncertain. Regional chemical transport model simulations are used to examine photochemical production 8 of ozone in air masses originating from boreal fire and anthropogenic emissions over North America and during their transport toward the Arctic during early July 2008. Model results shows good agreement with aircraft data collected over boreal fire source regions in Canada and several days down-wind over Greenland during the study period. Pollutant plumes were transported east and north towards the Arctic and show significant ozone enhancements downwind of source regions. Anthropogenic plumes were more photochemically active than fire plumes. Together, both sources made an important contribution to ozone in pollution plumes transported to the Arctic.

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

    E-Print Network [OSTI]

    Hensz, Christopher

    2013-01-15T23:59:59.000Z

    differences in environments along both paths Data ? Remote sensing: ? CCMP ocean winds ? AVHRR temperature ? AVHRR sea ice ? NPP layer 4 product ? Models: ? Linear exploration ? Circular-linear regression ? Non-linear regression m g C /m 2... d ay °C m /s Models ? Implemented in R ? Models: ? Linear exploration Southern Migration, 9 birds, n=929 Northern Migration, 9 birds, n=629 Future Directions 1: Finish non-linear model 2: Generalize procedure and include...

  13. Global simulations of ice nucleation and ice supersaturation with an improved cloud scheme in the Community

    E-Print Network [OSTI]

    Gettelman, Andrew

    and supersaturation in CAM. The new model is able to reproduce field observations of ice mass and mixed phase cloud are sensitive to the parameterization of ice clouds. These results indicate that ice clouds are potentiallyGlobal simulations of ice nucleation and ice supersaturation with an improved cloud scheme

  14. Assimilation of Ice Concentration in an IceOcean Model R. W. LINDSAY AND J. ZHANG

    E-Print Network [OSTI]

    Zhang, Jinlun

    are now available to determine the ice drift velocity. In addition, the drift of the pack ice can CoAssimilation of Ice Concentration in an Ice­Ocean Model R. W. LINDSAY AND J. ZHANG Polar Science October 2004, in final form 27 June 2005) ABSTRACT Ice concentration is a critical parameter of the polar

  15. Sea-ice thickness measurement based on the dispersion of ice swell

    E-Print Network [OSTI]

    -year pack ice, although other char- acteristics (Young's modulus, shear modulus, and Poisson coefficientSea-ice thickness measurement based on the dispersion of ice swell David Marsana) ISTerre, CNRS propagating in the Arctic sea ice cover is exploited in order to locally measure the ice thickness

  16. Impact of underwater-ice evolution on Arctic summer sea ice

    E-Print Network [OSTI]

    Worster, M. Grae

    Impact of underwater-ice evolution on Arctic summer sea ice Dirk Notz,1,4 Miles G. McPhee,2 M. Grae the simultaneous growth and ablation of a layer of ice between an under-ice melt pond and the underlying ocean. Such ``false bottoms'' are the only significant source of ice formation in the Arctic during summer. Analytical

  17. Electrical properties of saline ices and ice-silicate mixtures: geophysical and astrobiological consequences (Invited)

    E-Print Network [OSTI]

    Stillman, David E.

    MR22A-05 Electrical properties of saline ices and ice-silicate mixtures: geophysical) electrical-properties measurements of laboratory- produced saline ice, salt hydrates, and ice-silicate cutoff. In ice-silicate mixtures, brine channels are evident above the eutectic temperature only when

  18. 2011-12 PROSPECTUS2011-12 PROSPECTUS WESLEYAN MEN'S ICE HOCKEYWESLEYAN MEN'S ICE HOCKEY

    E-Print Network [OSTI]

    Devoto, Stephen H.

    - ponents in its inaugural season. Former bench boss Dave Snyder, in whose honor the Wesleyan ice rink2011-12 PROSPECTUS2011-12 PROSPECTUS WESLEYAN MEN'S ICE HOCKEYWESLEYAN MEN'S ICE HOCKEY #12....................................Chris Potter/Jeff Gilarde Men's Ice Hockey..............Chris Potter Women's Ice Hockey.........Jodi Mc

  19. Mathematics of Sea Ice K. M. Golden

    E-Print Network [OSTI]

    Golden, Kenneth M.

    , the sharp decline of the summer Arc- tic sea ice pack is probably the most dramatic. For example, the area and 1990's. While global climate models generally predict de- clines in the polar sea ice packs over the 21, such as the growth and decay of seasonal ice, the evolu- tion of ice pack reflectance, and biomass build

  20. 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

  1. Climate Change and Variability Lake Ice, Fishes

    E-Print Network [OSTI]

    Sheridan, Jennifer

    #12;Climate Change and Variability Lake Ice, Fishes and Water Levels John J. Magnuson Center to everything else." #12;The Invisible Present The Invisible Place Magnuson 2006 #12;Ice-on Day 2007 Peter W. Schmitz Photo Local Lake Mendota #12;Ice Breakup 2010 Lake Mendota March 20 #12;March 21 Ice Breakup 2010

  2. Adhesion Transition of Flexible Sheets

    E-Print Network [OSTI]

    Arthur A. Evans; Eric Lauga

    2009-05-31T23:59:59.000Z

    Intermolecular forces are known to precipitate adhesion events between solid bodies. Inspired by a macro-scale experiment showing the hysteretic adhesion of a piece of flexible tape over a plastic substrate, we develop here a model of far-field dry adhesion between two flexible sheets interacting via a power-law potential. We show that phase transitions from unadhered to adhered states occur as dictated by a dimensionless bending parameter representing the ratio of interaction strength to bending stiffness. The order of the adhesion transitions, as well as their hysteretic nature, is shown to depend on the form of the interaction potential between the flexible sheets. When three or more sheets interact, additional geometrical considerations determine the hierarchical or sequential nature of the adhesion transitions.

  3. Photovoltaic Reliability and Engineering (Revised) (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2011-06-01T23:59:59.000Z

    Capabilities fact sheet for the National Center for Photovoltaics: Photovoltaic Reliability and Engineering. One-sided sheet that includes Scope, Core Competencies and Capabilities, and Contact/Web information.

  4. Final Report for DOE grant DE-FG02-07ER64432 "New Grid and Discretization Technologies for Ocean and Ice Simulations"

    SciTech Connect (OSTI)

    Gunzburger, Max

    2013-03-12T23:59:59.000Z

    The work reported is in pursuit of these goals: high-quality unstructured, non-uniform Voronoi and Delaunay grids; improved finite element and finite volume discretization schemes; and improved finite element and finite volume discretization schemes. These are sought for application to spherical and three-dimensional applications suitable for ocean, atmosphere, ice-sheet, and other climate modeling applications.

  5. Fuel Synthesis Catalysis Laboratory (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2011-07-01T23:59:59.000Z

    This fact sheet provides information about Fuel Synthesis Catalysis Laboratory capabilities and applications at NREL's National Bioenergy Center.

  6. Wind Powering America Program Overview (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2008-04-01T23:59:59.000Z

    This fact sheet provides an overview of the U.S. Department of Energy's Wind Powering America Program.

  7. Biomass Catalyst Characterization Laboratory (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2011-07-01T23:59:59.000Z

    This fact sheet provides information about Biomass Catalyst Characterization Laboratory (BCCL) capabilities and applications at NREL's National Bioenergy Center.

  8. Fuel Synthesis Catalysis Laboratory (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2013-07-01T23:59:59.000Z

    This fact sheet provides information about Fuel Synthesis Catalysis Laboratory capabilities and applications at NREL's National Bioenergy Center.

  9. Bench-Scale Fermentation Laboratory (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2011-07-01T23:59:59.000Z

    This fact sheet provides information about Bench-Scale Fermentation Laboratory capabilities and applications at NREL's National Bioenergy Center.

  10. Federal Incentives for Water Power (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2013-05-01T23:59:59.000Z

    This fact sheet describes the federal incentives available as of April 2013 for the development of water power technologies.

  11. Algal Biofuels Research Laboratory (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2011-08-01T23:59:59.000Z

    This fact sheet provides information about Algal Biofuels Research Laboratory capabilities and applications at NREL's National Bioenergy Center.

  12. Small Wind Independent Testing (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2010-09-01T23:59:59.000Z

    This fact sheet describes the Small Wind Independent Testing at the NWTC and the Regional Test Centers project.

  13. Telling the NREL Story (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2014-07-01T23:59:59.000Z

    This fact sheet explains NREL's efforts to inform staff on consistent messaging and resources for communicating to laboratory stakeholders.

  14. Biomass Compositional Analysis Laboratory (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2011-07-01T23:59:59.000Z

    This fact sheet provides information about Biomass Compositional Analysis Laboratory (BCAL) capabilities and applications at NREL's National Bioenergy Center.

  15. Utility Rebates and Incentive Programs (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2009-07-01T23:59:59.000Z

    Fact sheet overview of the Federal Utility Partnership Working Group (FUPWG), including group objectives, activities, and services.

  16. Sulphate record from a northeast Greenland ice core over the last 1200 years based on continuous flow analysis

    E-Print Network [OSTI]

    Fischer, Hubertus

    distribution of heat, salt, and moisture, potentially driving climatic change on regional to global scales; Moran et al., 2006). In 2004, the first Integrated Ocean Drilling Program expedition to the Lomonosov

  17. Feasibility of reconstructing paleoatmospheric records of selected alkanes, methyl halides, and sulfur gases from Greenland ice cores

    E-Print Network [OSTI]

    Aydin, M.; Williams, M. B; Saltzman, E. S

    2007-01-01T23:59:59.000Z

    study of ethane and propane oxidation in the tropo- sphere,alkanes (ethane, C 2 H 6 ; propane, C 3 H 8 ; n-butane, n-Cfluid contamination. 4.1.2. Propane [ 24 ] Propane levels in

  18. Manifold free multiple sheet superplastic forming

    DOE Patents [OSTI]

    Elmer, John W.; Bridges, Robert L.

    2004-01-13T23:59:59.000Z

    Fluid-forming compositions in a container attached to enclosed adjacent sheets are heated to relatively high temperatures to generate fluids (gases) that effect inflation of the sheets. Fluid rates to the enclosed space between the sheets can be regulated by the canal from the container. Inflated articles can be produced by a continuous, rather than batch-type, process.

  19. Manifold free multiple sheet superplastic forming

    DOE Patents [OSTI]

    Elmer, John W. (Danville, CA); Bridges, Robert L. (Knoxville, TN)

    2001-01-01T23:59:59.000Z

    Fluid-forming compositions in a container attached to enclosed adjacent sheets are heated to relatively high temperatures to generate fluids (gases) that effect inflation of the sheets. Fluid rates to the enclosed space between the sheets can be regulated by the canal from the container. Inflated articles can be produced by a continuous, rather than batch-type, process.

  20. An experimental and theoretical study of the ice accretion process during artificial and natural icing conditions

    E-Print Network [OSTI]

    Kirby, Mark Samuel

    1986-01-01T23:59:59.000Z

    Real-time measurements of ice growth during artificial and natural icing conditions were conducted using an ultrasonic pulse-echo technique. This technique allows ice thickness to be measured with an accuracy of ?0.5 mm; ...

  1. Method of forming clathrate ice

    DOE Patents [OSTI]

    Hino, Toshiyuki (Tokyo, JP); Gorski, Anthony J. (Lemont, IL)

    1987-01-01T23:59:59.000Z

    A method of forming clathrate ice in a supercooled water-based liquid contained in a vessel is disclosed. Initially, an oscillator device is located in the liquid in the vessel. The oscillator device is then oscillated ultrasonically so that small crystals are formed in the liquid. These small crystals serve as seed crystals for ice formation in the liquid and thereby prevent supercooling of the liquid. Preferably, the oscillating device is controlled by a thermostat which initiates operation of the oscillator device when the temperature of the liquid is lowered to the freezing point. Thereafter, the operation of the oscillator device is terminated when ice is sensed in the liquid by an ice sensor.

  2. Method of forming calthrate ice

    DOE Patents [OSTI]

    Hino, T.; Gorski, A.J.

    1985-09-30T23:59:59.000Z

    A method of forming clathrate ice in a supercooled water-based liquid contained in a vessel is disclosed. Initially, an oscillator device is located in the liquid in the vessel. The oscillator device is then oscillated ultransonically so that small crystals are formed in the liquid. Thes small crystals serve as seed crystals for ice formation in the liquid and thereby prevent supercooling of the liquid. Preferably, the oscillating device is controlled by a thermostat which initiates operation of the oscillator device when the temperature of the liquid is lowered to the freezing point. Thereafter, the operation of the oscillator device is terminated when ice is sensed in the liquid by an ice sensor.

  3. amorphous water 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. amery ice shelf: 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...

  5. amorphous ice transition: 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...

  6. 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...

  7. alpine deep 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...

  8. airborne ice sounding: 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...

  9. Finance Degree Curriculum Information Sheet

    E-Print Network [OSTI]

    Lin, Xiaodong

    Finance Degree Curriculum Information Sheet Business Core 33:010:275-Intro. to Managerial:390:310-Financial Management for Finance Majors (3)* 33:620:301-Intro to Management (3)** 33:620:302-Management Management (3) Required Finance Courses 33:390:380-Investment Analysis (3) (pre-req: 33:390:310) 33

  10. Finance Degree Curriculum Information Sheet

    E-Print Network [OSTI]

    Lin, Xiaodong

    Finance Degree Curriculum Information Sheet 33:010:275-Intro. to Managerial Accounting (3) (pre-req: 33:010:272) 33:011:300-Business Forum (2) 33:390:310-Financial Management for Finance Majors (3)* 33:390:400-Corporate Finance (3) (pre-req: 33:390:310) 4 Finance electives (12) * Beginning Fall 2013

  11. Technology Performance Exchange (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2012-10-01T23:59:59.000Z

    This fact sheet, 'The Technology Performance Exchange' will be presented at the ET Summit, held at the Pasadena Convention Center on October 15-17, 2012. The Technology Performance Exchange will be a centralized, Web-based portal for finding and sharing energy performance data for commercial building technologies.

  12. Project Fact Sheet Project Update

    E-Print Network [OSTI]

    Project Fact Sheet Project Update: Project Brief: The works cover the refurbishment of floors 4, 5, with `wet' labs for molecular biology, materials characterisation, cell culture and flow studies, and `dry operating theatre. The Bionanotechnology Centre is one of the projects funded from the UK Government's £20

  13. Product Sheet Wall Mount Lift

    E-Print Network [OSTI]

    Saskatchewan, University of

    Product Sheet Wall Mount Lift Ergotron® Neo-FlexTM 870-05-061, rev. 12/11/07 www. Less effort. Feel the difference. Add greater range of movement to your LCD display or TV with the Neo-Flex Wall Mount Lift! CF patented lift-and-pivot motion technology adjusts with a light touch. Raise

  14. Project Fact Sheet Project Update

    E-Print Network [OSTI]

    & Figures: Budget: £51,074,000 Funding Source: Capital Plan Construction Project Programme: Start on SiteProject Fact Sheet Project Update: Project Brief: The concept of the new scheme is to redevelop Gardens project http://www.imperial.ac.uk/princesgardens/ Construction Project Team: Project Facts

  15. Project Fact Sheet Project Brief

    E-Print Network [OSTI]

    .union.ic.ac.uk/marketing/building Construction Project Team: Project Facts & Figures: Budget: £1,400,000 Funding Source: Capital PlanProject Fact Sheet Project Brief: In the first phase of the Union Building re that it adapts to meet the needs of a changing student body. The re-development plans are grounded in a full

  16. Project Fact Sheet Project Brief

    E-Print Network [OSTI]

    Facts & Figures: Budget: £3,500,000 Funding Source: SRIF III Construction Project Programme: StartProject Fact Sheet Project Brief: This project refurbished half of the 5th and 7th floors of work includes: · Building fabric replacement and revised space planning · New mechanical and electrical

  17. University Library Fact Sheet Postgraduate

    E-Print Network [OSTI]

    Brierley, Andrew

    University Library Fact Sheet Postgraduate Opening Hours Please consult the library website for our current opening hours: http://www.st-andrews.ac.uk/library/ Library Cards Your matriculation card is also your library card. To borrow books and access the Library you must bring your card with you

  18. University Library Fact Sheet Undergraduate

    E-Print Network [OSTI]

    Brierley, Andrew

    University Library Fact Sheet Undergraduate Opening Hours Please consult the library website for our current opening hours: http://www.st-andrews.ac.uk/library/ Library Cards Your matriculation card is also your library card. To borrow books and access the library you must bring your card with you

  19. JOB EVALUATION QUESTIONNAIRE ANSWER SHEET

    E-Print Network [OSTI]

    Amin, S. Massoud

    JOB EVALUATION QUESTIONNAIRE ANSWER SHEET DO NOT WRITE IN THIS SPACE N.C. Date Received Reclass New Starting Date in Class Yes No NA (NA if Temporary Job) Notice # Effective Date If Reclassified IS TO BE USED WITH THE JOB EVALUATION QUESTIONNAIRE (BA 802) ONLY FOR POSITIONS COVERED BY CIVIL SERVICE

  20. Strategic Energy Analysis (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2014-02-01T23:59:59.000Z

    NREL complements its scientific research with high-quality, credible, technology-neutral, objective analysis that informs policy and investment decisions as renewable energy and energy efficiency technologies move from innovation through integration. This sheet highlights NREL's analytical capabilities and achievements.

  1. Magnetic Resonance Facility (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2012-03-01T23:59:59.000Z

    This fact sheet provides information about Magnetic Resonance Facility capabilities and applications at NREL's National Bioenergy Center. Liquid and solid-state analysis capability for a variety of biomass, photovoltaic, and materials characterization applications across NREL. NREL scientists analyze solid and liquid samples on three nuclear magnetic resonance (NMR) spectrometers as well as an electron paramagnetic resonance (EPR) spectrometer.

  2. An update on modeling land-ice/ocean interactions in CESM

    SciTech Connect (OSTI)

    Asay-davis, Xylar [Los Alamos National Laboratory

    2011-01-24T23:59:59.000Z

    This talk is an update on ongoing land-ice/ocean coupling work within the Community Earth System Model (CESM). The coupling method is designed to allow simulation of a fully dynamic ice/ocean interface, while requiring minimal modification to the existing ocean model (the Parallel Ocean Program, POP). The method makes use of an immersed boundary method (IBM) to represent the geometry of the ice-ocean interface without requiring that the computational grid be modified in time. We show many of the remaining development challenges that need to be addressed in order to perform global, century long climate runs with fully coupled ocean and ice sheet models. These challenges include moving to a new grid where the computational pole is no longer at the true south pole and several changes to the coupler (the software tool used to communicate between model components) to allow the boundary between land and ocean to vary in time. We discuss benefits for ice/ocean coupling that would be gained from longer-term ocean model development to allow for natural salt fluxes (which conserve both water and salt mass, rather than water volume).

  3. Stable dynamics in a Greenland tidewater glacier over 26 years despite reported thinning

    E-Print Network [OSTI]

    Huybrechts, Philippe

    , there is potential for the grounding line to retreat, for calving rates to increase and for the glacier to accelerateStable dynamics in a Greenland tidewater glacier over 26 years despite reported thinning Suzanne L glacier terminating in the northwest corner of the Scoresby Sund fjords. We present a time series

  4. Regional sensitivity of Greenland precipitation to NAO variability E. Mosley-Thompson,1,2

    E-Print Network [OSTI]

    Howat, Ian M.

    Regional sensitivity of Greenland precipitation to NAO variability E. Mosley-Thompson,1,2 C. R. Readinger,1,2 P. Craigmile,3 L. G. Thompson,1,4 and C. A. Calder3 Received 27 September 2005; revised 2. Citation: Mosley-Thompson, E., C. R. Readinger, P. Craigmile, L. G. Thompson, and C. A. Calder (2005

  5. Vapor deposition of water on graphitic surfaces: Formation of amorphous ice, bilayer ice, ice I, and liquid water

    SciTech Connect (OSTI)

    Lupi, Laura; Kastelowitz, Noah; Molinero, Valeria, E-mail: Valeria.Molinero@utah.edu [Department of Chemistry, The University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-0850 (United States)

    2014-11-14T23:59:59.000Z

    Carbonaceous surfaces are a major source of atmospheric particles and could play an important role in the formation of ice. Here we investigate through molecular simulations the stability, metastability, and molecular pathways of deposition of amorphous ice, bilayer ice, and ice I from water vapor on graphitic and atomless Lennard-Jones surfaces as a function of temperature. We find that bilayer ice is the most stable ice polymorph for small cluster sizes, nevertheless it can grow metastable well above its region of thermodynamic stability. In agreement with experiments, the simulations predict that on increasing temperature the outcome of water deposition is amorphous ice, bilayer ice, ice I, and liquid water. The deposition nucleation of bilayer ice and ice I is preceded by the formation of small liquid clusters, which have two wetting states: bilayer pancake-like (wetting) at small cluster size and droplet-like (non-wetting) at larger cluster size. The wetting state of liquid clusters determines which ice polymorph is nucleated: bilayer ice nucleates from wetting bilayer liquid clusters and ice I from non-wetting liquid clusters. The maximum temperature for nucleation of bilayer ice on flat surfaces, T{sub B}{sup max} is given by the maximum temperature for which liquid water clusters reach the equilibrium melting line of bilayer ice as wetting bilayer clusters. Increasing water-surface attraction stabilizes the pancake-like wetting state of liquid clusters leading to larger T{sub B}{sup max} for the flat non-hydrogen bonding surfaces of this study. The findings of this study should be of relevance for the understanding of ice formation by deposition mode on carbonaceous atmospheric particles, including soot.

  6. NOAA Technical Memorandum GLERL-135 Great Lakes Ice Cover Climatology

    E-Print Network [OSTI]

    ____________________________________________________________________________ Great Lakes Ice Cover Climatology Update: Winters 2003, 2004, and 2005 Raymond A. Assel NOAA, Great..................................................................................................6 DATES OF FIRST (LAST) ICE AND ICE DURATION. .............................................................7 SEASONAL PROGRESSION OF ICE COVER

  7. Ross Ice Shelf in situ radio-frequency ice attenuation

    E-Print Network [OSTI]

    Taylor Barrella; Steven Barwick; David Saltzberg

    2012-05-01T23:59:59.000Z

    We have measured the in situ average electric field attenuation length for radio-frequency signals broadcast vertically through the Ross Ice Shelf. We chose a location, Moore Embayment, south of Minna Bluff, known for its high reflectivity at the ice-sea interface. We confirmed specular reflection and used the return pulses to measure the average attenuation length from 75-1250 MHz over the round-trip distance of 1155 m. We find the average electric field attenuation length to vary from 500 m at 75 MHz to 300 m at 1250 MHz, with an experimental uncertainty of 55 to 15 m. We discuss the implications for neutrino telescopes that use the radio technique and include the Ross Ice Shelf as part of their sensitive volume.

  8. Method for heating, forming and tempering a glass sheet

    DOE Patents [OSTI]

    Boaz, Premakaran Tucker (Livonia, MI); Sitzman, Gary W. (Walled Lake, MI)

    1998-01-01T23:59:59.000Z

    A method for heating, forming and tempering a glass sheet including the steps of heating at least one glass sheet to at least a first predetermined temperature, applying microwave energy to the glass sheet to heat the glass sheet to at least a second predetermined temperature, forming the glass sheet to a predetermined configuration, and cooling an outer surface of the glass sheet to at least a third predetermined temperature to temper the glass sheet.

  9. Method for heating, forming and tempering a glass sheet

    DOE Patents [OSTI]

    Boaz, P.T.; Sitzman, G.W.

    1998-10-27T23:59:59.000Z

    A method for heating, forming and tempering a glass sheet is disclosed including the steps of heating at least one glass sheet to at least a first predetermined temperature, applying microwave energy to the glass sheet to heat the glass sheet to at least a second predetermined temperature, forming the glass sheet to a predetermined configuration, and cooling an outer surface of the glass sheet to at least a third predetermined temperature to temper the glass sheet. 2 figs.

  10. Ice-condenser aerosol tests

    SciTech Connect (OSTI)

    Ligotke, M.W.; Eschbach, E.J.; Winegardner, W.K. (Pacific Northwest Lab., Richland, WA (United States))

    1991-09-01T23:59:59.000Z

    This report presents the results of an experimental investigation of aerosol particle transport and capture using a full-scale height and reduced-scale cross section test facility based on the design of the ice compartment of a pressurized water reactor (PWR) ice-condenser containment system. Results of 38 tests included thermal-hydraulic as well as aerosol particle data. Particle retention in the test section was greatly influenced by thermal-hydraulic and aerosol test parameters. Test-average decontamination factor (DF) ranged between 1.0 and 36 (retentions between {approximately}0 and 97.2%). The measured test-average particle retentions for tests without and with ice and steam ranged between DF = 1.0 and 2.2 and DF = 2.4 and 36, respectively. In order to apparent importance, parameters that caused particle retention in the test section in the presence of ice were steam mole fraction (SMF), noncondensible gas flow rate (residence time), particle solubility, and inlet particle size. Ice-basket section noncondensible flows greater than 0.1 m{sup 3}/s resulted in stable thermal stratification whereas flows less than 0.1 m{sup 3}/s resulted in thermal behavior termed meandering with frequent temperature crossovers between flow channels. 10 refs., 66 figs., 16 tabs.

  11. Action Sheet 36 Final Report

    SciTech Connect (OSTI)

    Kips, R E; Kristo, M J; Hutcheon, I D

    2012-02-24T23:59:59.000Z

    Pursuant to the Arrangement between the European Commission DG Joint Research Centre (EC-JRC) and the Department of Energy (DOE) to continue cooperation on research, development, testing, and evaluation of technology, equipment, and procedures in order to improve nuclear material control, accountancy, verification, physical protection, and advanced containment and surveillance technologies for international safeguards, dated 1 September 2008, the IRMM and LLNL established cooperation in a program on the Study of Chemical Changes in Uranium Oxyfluoride Particles under IRMM-LLNL Action Sheet 36. The work under this action sheet had 2 objectives: (1) Achieve a better understanding of the loss of fluorine in UO{sub 2}F{sub 2} particles after exposure to certain environmental conditions; and (2) Provide feedback to the EC-JRC on sample reproducibility and characteristics.

  12. Geothermal Technologies Program Fact Sheet

    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 DataDepartment of Energy Your Density Isn't YourTransport(Fact Sheet), Geothermal Technologies Program (GTP) |PrincipalEnergy

  13. Miocene to recent ice elevation variations from the interior of the West Antarctic ice sheet: Constraints from geologic observations, cosmogenic

    E-Print Network [OSTI]

    Mukhopadhyay, Sujoy

    ,n , Robert P. Ackert Jr.a , Allen E. Pope a,b , David Pollard c , Robert M. DeConto d a Department of Earth, University of Cambridge, Lensfield Road, CB2 1ER, England c Earth and Environmental Systems Institute-term observational constraints are however, rare. Here we present the first constraints on long-term (Miocene

  14. Heavy ion irradiation of crystalline water ice

    E-Print Network [OSTI]

    Dartois, E; Boduch, P; Brunetto, R; Chabot, M; Domaracka, A; Ding, J J; Kamalou, O; Lv, X Y; Rothard, H; da Silveira, E F; Thomas, J C

    2015-01-01T23:59:59.000Z

    Under cosmic irradiation, the interstellar water ice mantles evolve towards a compact amorphous state. Crystalline ice amorphisation was previously monitored mainly in the keV to hundreds of keV ion energies. We experimentally investigate heavy ion irradiation amorphisation of crystalline ice, at high energies closer to true cosmic rays, and explore the water-ice sputtering yield. We irradiated thin crystalline ice films with MeV to GeV swift ion beams, produced at the GANIL accelerator. The ice infrared spectral evolution as a function of fluence is monitored with in-situ infrared spectroscopy (induced amorphisation of the initial crystalline state into a compact amorphous phase). The crystalline ice amorphisation cross-section is measured in the high electronic stopping-power range for different temperatures. At large fluence, the ice sputtering is measured on the infrared spectra, and the fitted sputtering-yield dependence, combined with previous measurements, is quadratic over three decades of electronic ...

  15. Thermal Storage with Ice Harvesting Systems

    E-Print Network [OSTI]

    Knebel, D. E.

    1986-01-01T23:59:59.000Z

    Application of Harvesting Ice Storage Systems. Thermal storage systems are becoming widely accepted techniques for utility load management. This paper discusses the principles of ice harvesting equipment and their application to the multi...

  16. Quantum Ice : a quantum Monte Carlo study

    E-Print Network [OSTI]

    Nic Shannon; Olga Sikora; Frank Pollmann; Karlo Penc; Peter Fulde

    2011-12-13T23:59:59.000Z

    Ice states, in which frustrated interactions lead to a macroscopic ground-state degeneracy, occur in water ice, in problems of frustrated charge order on the pyrochlore lattice, and in the family of rare-earth magnets collectively known as spin ice. Of particular interest at the moment are "quantum spin ice" materials, where large quantum fluctuations may permit tunnelling between a macroscopic number of different classical ground states. Here we use zero-temperature quantum Monte Carlo simulations to show how such tunnelling can lift the degeneracy of a spin or charge ice, stabilising a unique "quantum ice" ground state --- a quantum liquid with excitations described by the Maxwell action of 3+1-dimensional quantum electrodynamics. We further identify a competing ordered "squiggle" state, and show how both squiggle and quantum ice states might be distinguished in neutron scattering experiments on a spin ice material.

  17. Rubber friction on ice and snow surfaces 

    E-Print Network [OSTI]

    Skouvaklis, Gerasimos

    2011-06-28T23:59:59.000Z

    The friction of rubber on ice and snow surfaces is complex. Deeper scientific understanding is important for optimising performance of tyres in winter. Rubber, ice and snow systems exhibit frictional behaviour which ...

  18. Developing Great Lakes Ice Model (GLIM) using CIOM (Coupled Ice-Ocean Model) in Lake Erie

    E-Print Network [OSTI]

    Developing Great Lakes Ice Model (GLIM) using CIOM (Coupled Ice- Ocean Model) in Lake Erie Primary of the ice-ocean models, assistance with development of project reports and scientific presentations will first start the implementation of the CIOM in Lake Erie, assemble satellite observations of ice cover

  19. Quenched by ice: Transient grating measurements of vibronic dynamics in bromine-doped ice

    E-Print Network [OSTI]

    Apkarian, V. Ara

    Quenched by ice: Transient grating measurements of vibronic dynamics in bromine-doped ice I. U April 2006; published online 25 May 2006 In both water and in ice, the absorption spectra of bromine of the trapped molecule in its electronic B 3 0u state in ice. Independent of the initial excitation energy

  20. 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