Local Rates of Ice-Sheet Thickness Change in Greenland
The rate of ice-sheet thickness change is calculated for 10 sites in Greenland by comparing measured values of ice vertical velocity and snow-accumulation rate. Vertical velocities are derived from repeat surveys of markers using precision global positioning system techniques, and accumulation rates...
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ftmaineuniv:oai:digitalcommons.library.umaine.edu:ers_facpub-1130 2023-05-15T16:21:19+02:00 Local Rates of Ice-Sheet Thickness Change in Greenland Hamilton, Gordon S. Whillans, Ian M. 2002-01-01T08:00:00Z application/pdf https://digitalcommons.library.umaine.edu/ers_facpub/131 https://digitalcommons.library.umaine.edu/cgi/viewcontent.cgi?article=1130&context=ers_facpub unknown DigitalCommons@UMaine https://digitalcommons.library.umaine.edu/ers_facpub/131 https://digitalcommons.library.umaine.edu/cgi/viewcontent.cgi?article=1130&context=ers_facpub This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. In addition, no permission is required from the rights-holder(s) for educational uses. For other uses, you need to obtain permission from the rights-holder(s). Earth Science Faculty Scholarship Earth Sciences text 2002 ftmaineuniv 2023-03-12T18:49:12Z The rate of ice-sheet thickness change is calculated for 10 sites in Greenland by comparing measured values of ice vertical velocity and snow-accumulation rate. Vertical velocities are derived from repeat surveys of markers using precision global positioning system techniques, and accumulation rates are determined from stratigraphic analysis of firn cores. The results apply to time-scales covered by the firn-core records, which in most cases are a few decades. A spectrum of thickness-change rates is obtained, ranging from substantial thinning to slow thickening. The sites where ice-sheet thinning is indicated are located near the ice-sheet margin or in outlet glacier catchments. Interior and high-elevation sites are predominantly in balance or thickening slowly. Uncertainties in the rates of thickness change are dominated by errors in the determination of accumulation rates. The results of this work are broadly comparable with regional estimates of mass balance obtained from the analysis of catchment input vs discharge. Text glacier Greenland Ice Sheet The University of Maine: DigitalCommons@UMaine Greenland |
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Open Polar |
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The University of Maine: DigitalCommons@UMaine |
op_collection_id |
ftmaineuniv |
language |
unknown |
topic |
Earth Sciences |
spellingShingle |
Earth Sciences Hamilton, Gordon S. Whillans, Ian M. Local Rates of Ice-Sheet Thickness Change in Greenland |
topic_facet |
Earth Sciences |
description |
The rate of ice-sheet thickness change is calculated for 10 sites in Greenland by comparing measured values of ice vertical velocity and snow-accumulation rate. Vertical velocities are derived from repeat surveys of markers using precision global positioning system techniques, and accumulation rates are determined from stratigraphic analysis of firn cores. The results apply to time-scales covered by the firn-core records, which in most cases are a few decades. A spectrum of thickness-change rates is obtained, ranging from substantial thinning to slow thickening. The sites where ice-sheet thinning is indicated are located near the ice-sheet margin or in outlet glacier catchments. Interior and high-elevation sites are predominantly in balance or thickening slowly. Uncertainties in the rates of thickness change are dominated by errors in the determination of accumulation rates. The results of this work are broadly comparable with regional estimates of mass balance obtained from the analysis of catchment input vs discharge. |
format |
Text |
author |
Hamilton, Gordon S. Whillans, Ian M. |
author_facet |
Hamilton, Gordon S. Whillans, Ian M. |
author_sort |
Hamilton, Gordon S. |
title |
Local Rates of Ice-Sheet Thickness Change in Greenland |
title_short |
Local Rates of Ice-Sheet Thickness Change in Greenland |
title_full |
Local Rates of Ice-Sheet Thickness Change in Greenland |
title_fullStr |
Local Rates of Ice-Sheet Thickness Change in Greenland |
title_full_unstemmed |
Local Rates of Ice-Sheet Thickness Change in Greenland |
title_sort |
local rates of ice-sheet thickness change in greenland |
publisher |
DigitalCommons@UMaine |
publishDate |
2002 |
url |
https://digitalcommons.library.umaine.edu/ers_facpub/131 https://digitalcommons.library.umaine.edu/cgi/viewcontent.cgi?article=1130&context=ers_facpub |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
glacier Greenland Ice Sheet |
genre_facet |
glacier Greenland Ice Sheet |
op_source |
Earth Science Faculty Scholarship |
op_relation |
https://digitalcommons.library.umaine.edu/ers_facpub/131 https://digitalcommons.library.umaine.edu/cgi/viewcontent.cgi?article=1130&context=ers_facpub |
op_rights |
This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. In addition, no permission is required from the rights-holder(s) for educational uses. For other uses, you need to obtain permission from the rights-holder(s). |
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1766009331507003392 |