Mass balance of the Antarctic ice sheet
The Antarctic contribution to sea-level rise has long been uncertain. While regional variability in ice dynamics has been revealed, a picture of mass changes throughout the continental ice sheet is lacking. Here, we use satellite radar altimetry to measure the elevation change of 72 % of the grounde...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.170.4852 2023-05-15T13:57:03+02:00 Mass balance of the Antarctic ice sheet D. J. Wingham A. Shepherd A. Muir G. J. Marshall The Pennsylvania State University CiteSeerX Archives 2006 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.170.4852 http://www.cpom.org/research/djw-ptrsa364.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.170.4852 http://www.cpom.org/research/djw-ptrsa364.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.cpom.org/research/djw-ptrsa364.pdf Antarctica sea level mass balance altimetry text 2006 ftciteseerx 2016-01-07T16:01:52Z The Antarctic contribution to sea-level rise has long been uncertain. While regional variability in ice dynamics has been revealed, a picture of mass changes throughout the continental ice sheet is lacking. Here, we use satellite radar altimetry to measure the elevation change of 72 % of the grounded ice sheet during the period 1992–2003. Depending on the density of the snow giving rise to the observed elevation fluctuations, the ice sheet mass trend falls in the range K5–C85 Gt yr K1. We find that data from climate model reanalyses are not able to characterise the contemporary snowfall fluctuation with useful accuracy and our best estimate of the overall mass trend—growth of 27G29 Gt yr K1 —is based on an assessment of the expected snowfall variability. Mass gains from accumulating snow, particularly on the Antarctic Peninsula and within East Antarctica, exceed the ice dynamic mass loss from West Antarctica. The result exacerbates the difficulty of explaining twentieth century sea-level rise. Text Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica Ice Sheet West Antarctica Unknown Antarctic Antarctic Peninsula East Antarctica K5 ENVELOPE(24.794,24.794,67.805,67.805) The Antarctic West Antarctica |
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ftciteseerx |
language |
English |
topic |
Antarctica sea level mass balance altimetry |
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Antarctica sea level mass balance altimetry D. J. Wingham A. Shepherd A. Muir G. J. Marshall Mass balance of the Antarctic ice sheet |
topic_facet |
Antarctica sea level mass balance altimetry |
description |
The Antarctic contribution to sea-level rise has long been uncertain. While regional variability in ice dynamics has been revealed, a picture of mass changes throughout the continental ice sheet is lacking. Here, we use satellite radar altimetry to measure the elevation change of 72 % of the grounded ice sheet during the period 1992–2003. Depending on the density of the snow giving rise to the observed elevation fluctuations, the ice sheet mass trend falls in the range K5–C85 Gt yr K1. We find that data from climate model reanalyses are not able to characterise the contemporary snowfall fluctuation with useful accuracy and our best estimate of the overall mass trend—growth of 27G29 Gt yr K1 —is based on an assessment of the expected snowfall variability. Mass gains from accumulating snow, particularly on the Antarctic Peninsula and within East Antarctica, exceed the ice dynamic mass loss from West Antarctica. The result exacerbates the difficulty of explaining twentieth century sea-level rise. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
D. J. Wingham A. Shepherd A. Muir G. J. Marshall |
author_facet |
D. J. Wingham A. Shepherd A. Muir G. J. Marshall |
author_sort |
D. J. Wingham |
title |
Mass balance of the Antarctic ice sheet |
title_short |
Mass balance of the Antarctic ice sheet |
title_full |
Mass balance of the Antarctic ice sheet |
title_fullStr |
Mass balance of the Antarctic ice sheet |
title_full_unstemmed |
Mass balance of the Antarctic ice sheet |
title_sort |
mass balance of the antarctic ice sheet |
publishDate |
2006 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.170.4852 http://www.cpom.org/research/djw-ptrsa364.pdf |
long_lat |
ENVELOPE(24.794,24.794,67.805,67.805) |
geographic |
Antarctic Antarctic Peninsula East Antarctica K5 The Antarctic West Antarctica |
geographic_facet |
Antarctic Antarctic Peninsula East Antarctica K5 The Antarctic West Antarctica |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica Ice Sheet West Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica Ice Sheet West Antarctica |
op_source |
http://www.cpom.org/research/djw-ptrsa364.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.170.4852 http://www.cpom.org/research/djw-ptrsa364.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766264647737933824 |