Last edited by Tegor
Saturday, May 16, 2020 | History

2 edition of Assessment of climate variablity of the Greenland ice sheet found in the catalog.

Assessment of climate variablity of the Greenland ice sheet

Assessment of climate variablity of the Greenland ice sheet

integration of in situ and satellite data

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  • 7 Currently reading

Published by National Aeronautics and Space Administration, National Technical Information Service, distributor in [Washington, DC, Springfield, Va .
Written in English

    Subjects:
  • Annual variations.,
  • Climatology.,
  • Data processing.,
  • Energy budgets.,
  • Greenland.,
  • Ice.,
  • Remote sensing.,
  • Satellite observation.,
  • Snow.,
  • Surface properties.

  • Edition Notes

    StatementK. Steffen ... [et al.].
    SeriesNASA contractor report -- NASA CR-198020.
    ContributionsSteffen, Konrad., United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15415722M

    Data from NASA's GRACE and GRACE Follow-On satellites show that the land ice sheets in both Antarctica (upper chart) and Greenland (lower chart) have been losing mass since The GRACE mission concluded science operations in June GRACE Author: NASA Global Climate Change.   This post was first published by the Center for Climate and Life, a research initiative based at Lamont-Doherty Earth Observatory.. Joerg Schaefer and Gisela Winckler, geochemists and paleoclimatologists at Lamont-Doherty Earth Observatory, were awarded funding from the Center for Climate and Life to examine the vulnerability of Greenland’s massive ice sheet.

    This is primarily caused by ocean warming and the melting of ice sheets on Greenland and Antarctica. The melting of this land-based ice in particular is gathering pace.   There was a dramatic melting of Greenland’s ice sheet in the summer of , researchers have confirmed, in a study that reveals the loss .

    Climate Change The Physical Science climate models climate system climate variability CMIP5 CO2 concentrations CO2 emissions CO2 sink contribution cryosphere data sets decade decrease Earth estimates evidence extremes feedbacks Figure flux Geophys glacial glaciers global average GMSL GMST Greenland ice sheet Hemisphere high confidence Reviews: 2. The results point to Greenland Icesheet meltwater as a potential factor for interhemispheric climate variability. Abstract Interhemispheric climate variability during the last glacial period is commonly linked with semi-periodic freshwater discharges into the North Atlantic from surrounding ice sheets.


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Assessment of climate variablity of the Greenland ice sheet Download PDF EPUB FB2

The climate recordings from the EWCU camp on the western slope of the Greenland ice sheet are probably the longest and most complete climate record for the entire ice sheet.

A total of 20 climate variables were recorded at a temporal resolution of 3 hours continuously from through the present. NASA-CR ASSESSMENT OF CLIMATE VARIABILITY OF THE GREENLAND ICE SHEET: INTEGRATION OF IN SITU AND SATELLITE DATA. Steffen, W. Abdalati, J. Stroeve, J. Key University of Colorado at Boulder Cooperative Institute for Research in Environmental Sciences Divisicm of Cryospheric and Polar Processes Campus BoxBoulder CO NAGW.

Get this from a library. Assessment of climate variability of the Greenland ice sheet: integration of in situ and satellite data. [K Steffen; United States. National Aeronautics and Space Administration.;]. The proposed research involves the application of multispectral satellite data in combination with ground truth measurements to monitor surface properties of the Greenland Ice Sheet which are essential for describing the energy and mass of the ice sheet.

Several key components of the energy balance are parameterized using satellite data and in situ : K. Steffen, W. Abdalati, J. Stroeve, A. Nolin, J. Key, J. Zwally, M. Stober, J. Kreuter. [1] Satellite‐derived moderate‐resolution imaging spectroradiometer (MODIS) ice‐surface temperature (IST) of the Greenland ice sheet shows a positive trend and two major melt events from to present.

IST increased by ~ ± °C/decade, with the greatest increase (~ ± °C/decade) found in northwestern Greenland where coastal temperatures and mass loss are also. Meteorological station records and regional climate model output are combined to develop a continuous yr (–) spatial reconstruction of monthly, seasonal, and annual mean Greenland ice sheet near-surface air temperatures.

Independent observations are used to assess and compensate for systematic errors in the model by:   The Greenland Ice Sheet has been a major contributor to global sea-level rise in recent decades 1,2, and it is expected to continue to be so gh increases in glacier flow 4,5,6 and surface.

some Greenland and Antarctic outlet glaciers, which drain ice from the interior. The corresponding increased ice sheet mass loss has often followed thinning, reduction or loss of ice shelves or loss of fl oating glacier tongues.

Assessment of the data and techniques suggests a mass balance of the Greenland Ice Sheet of between +25 and. A major gap in predictive capability concerning the future evolution of the ice sheets was identified in the Fourth Assessment Report (AR4) of the Intergovernmental Panel on Climate by: Greenland surface mass balance is highly variable year to year; this variability can impact regional climate, ice sheet dynamics, and the assessment of Greenland ice loss trends.

DOE researchers have carried out a surface mass balance variability analysis of a Community Earth System Model (CESM) simulation with Greenland surface mass balance. The integrated surface mass balance (SMB) of the Greenland Ice Sheet (GrIS) has large interannual variability.

Long-term future changes to this variability will affect GrIS dynamics, freshwater fluxes, regional oceanography, and detection of changes in ice volume trends. Greenland Ice Sheet's weigh-in suggests a small increase in ice mass Septem Unusual weather conditions in —including a blizzard caused by the remnants of 's Hurricane Nicole and a short surface melt season—are behind preliminary estimates of a small gain in ice mass on the Greenland Ice Sheet this year.

Melting of the Greenland ice sheet is an important anticipated consequence of human‐induced climate change.

The human‐induced signal on the Greenland ice sheet can be modulated by internal variability (inherent atmospheric “noise” that arises due to nonlinear processes associated with atmosphere, ocean, and atmosphere‐ocean dynamics).Author: Peter Sherman, Eli Tziperman, Clara Deser, Michael McElroy.

The cryosphere and its interactions with other components of the climate system are considered to be major influences on global climate change through the Cenozoic and into the future. However, fundamental dynamics and secondary feedbacks that drive long-term ice sheet variability on Greenland remain poorly understood.

Here, a numerical climate-ice sheet modeling study is conducted with the Author: Sebastian Jan Koenig. Such changes were found in areas around Jakobshavn Isbrae in western Greenland and Helheim glacier in south east Greenland with the increase in ice flow pulling more ice out of the interior, contributing to a thinning of the ice sheet.

The observational datasets used in this study have been developed through the European Space Agency’s Climate Change Initiative. Greenland flow variability from ice-sheet-wide velocity mapping Ian JOUGHIN, 1 Ben E.

SMITH, 1 Ian M. HOWAT, 2 Ted SCAMBOS, 3 Twila MOON 1 1 Polar Science Center, Applied Physics Laboratory, University of Washington, NE 40th Street, Seattle, Washington ,USA E-mail: [email protected] 2 School of Earth Sciences and Byrd Polar Research Center, The Ohio.

In this unit, you will look at graph and map data to think about how, if at all, the Greenland ice sheet is changing. Greenland is the world's largest island and lies east of Canada at the northern margin of the Atlantic Ocean and the southern edge of the Arctic Ocean.

Much of the island (~81%) is covered in the second largest ice sheet in the. As he describes in the book, citing research from NASA, the island has been losing billion tons of ice every year, which is double the rate of loss it was experiencing only 15 years : Yudhijit Bhattacharjee.

In the Fifth Assessment Report (AR5) of the Intergovernmental Panel on Climate Change [], mass loss from the Greenland ice sheet (GrIS) is discussed in chapter 4 on observed changes in the cryosphere [] and chapter 13 on sea level change [].In these chapters, results published prior to July are combined to demonstrate that the GrIS (including its peripheral glaciers) lost an Cited by: Loss of land ice is a potential indicator of climate change and contributes directly to sea level rise, posing a risk to people living near the coast across the world.

“The Greenland losses have raised sea level by around half a millimeter each year over the observed period,” explains Dr Mottram.

The world's sea levels are rising 3mm per year, and of that Greenland's ice sheet contributes 1mm – it is losing between to billion tons of ice per year.

This demonstrates a key role for Greenland topography in mediating the cloud and melt response to large-scale circulation variability.

These results suggest that future melt will depend on the pattern of circulation anomalies as well as the shape of the Greenland Ice : L.

C. Hahn, L. C. Hahn, T. Storelvmo, S. Hofer, S. Hofer, R. Parfitt, R. Parfitt, C. C. Ummenhofer. The role of natural forcing in generating variability in the surface mass balance of the Greenland ice sheet (GrIS) remains unclear.

Furthermore, mass variations in the GrIS over the past several centuries are poorly constrained. Until the impact of natural climate variations is better understood, it will be difficult to isolate the role anthropogenic greenhouse gases have had on GrIS Author: H.

Andres, W. R. Peltier.