Four decades of Antarctic Ice Sheet mass balance from 1979-2017
We use updated drainage inventory, ice thickness, and ice velocity data to calculate the grounding line ice discharge of 176 basins draining the Antarctic Ice Sheet from 1979 to 2017. We compare the results with a surface mass balance model to deduce the ice sheet mass balance. The total mass loss i...
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ftcdlib:qt68p1n8x1 2023-05-15T14:03:27+02:00 Four decades of Antarctic Ice Sheet mass balance from 1979-2017 Rignot, Eric Mouginot, Jeremie Scheuchl, Bernd van den Broeke, Michiel van Wessem, Melchior J Morlighem, Mathieu 1095 - 1103 2019-01-22 application/pdf http://www.escholarship.org/uc/item/68p1n8x1 english eng eScholarship, University of California qt68p1n8x1 http://www.escholarship.org/uc/item/68p1n8x1 Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ CC-BY Rignot, Eric; Mouginot, Jeremie; Scheuchl, Bernd; van den Broeke, Michiel; van Wessem, Melchior J; & Morlighem, Mathieu. (2019). Four decades of Antarctic Ice Sheet mass balance from 1979-2017. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 116(4), 1095 - 1103. doi:10.1073/pnas.1812883116. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/68p1n8x1 glaciology Antarctica remote sensing climate change sea-level rise MD Multidisciplinary article 2019 ftcdlib https://doi.org/10.1073/pnas.1812883116 2019-03-08T23:52:19Z We use updated drainage inventory, ice thickness, and ice velocity data to calculate the grounding line ice discharge of 176 basins draining the Antarctic Ice Sheet from 1979 to 2017. We compare the results with a surface mass balance model to deduce the ice sheet mass balance. The total mass loss increased from 40 ± 9 Gt/y in 1979-1990 to 50 ± 14 Gt/y in 1989-2000, 166 ± 18 Gt/y in 1999-2009, and 252 ± 26 Gt/y in 2009-2017. In 2009-2017, the mass loss was dominated by the Amundsen/Bellingshausen Sea sectors, in West Antarctica (159 ± 8 Gt/y), Wilkes Land, in East Antarctica (51 ± 13 Gt/y), and West and Northeast Peninsula (42 ± 5 Gt/y). The contribution to sea-level rise from Antarctica averaged 3.6 ± 0.5 mm per decade with a cumulative 14.0 ± 2.0 mm since 1979, including 6.9 ± 0.6 mm from West Antarctica, 4.4 ± 0.9 mm from East Antarctica, and 2.5 ± 0.4 mm from the Peninsula (i.e., East Antarctica is a major participant in the mass loss). During the entire period, the mass loss concentrated in areas closest to warm, salty, subsurface, circumpolar deep water (CDW), that is, consistent with enhanced polar westerlies pushing CDW toward Antarctica to melt its floating ice shelves, destabilize the glaciers, and raise sea level. Article in Journal/Newspaper Antarc* Antarctic Antarctica Bellingshausen Sea East Antarctica Ice Sheet Ice Shelves West Antarctica Wilkes Land University of California: eScholarship Antarctic Bellingshausen Sea East Antarctica The Antarctic West Antarctica Wilkes Land ENVELOPE(120.000,120.000,-69.000,-69.000) Proceedings of the National Academy of Sciences 116 4 1095 1103 |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
English |
topic |
glaciology Antarctica remote sensing climate change sea-level rise MD Multidisciplinary |
spellingShingle |
glaciology Antarctica remote sensing climate change sea-level rise MD Multidisciplinary Rignot, Eric Mouginot, Jeremie Scheuchl, Bernd van den Broeke, Michiel van Wessem, Melchior J Morlighem, Mathieu Four decades of Antarctic Ice Sheet mass balance from 1979-2017 |
topic_facet |
glaciology Antarctica remote sensing climate change sea-level rise MD Multidisciplinary |
description |
We use updated drainage inventory, ice thickness, and ice velocity data to calculate the grounding line ice discharge of 176 basins draining the Antarctic Ice Sheet from 1979 to 2017. We compare the results with a surface mass balance model to deduce the ice sheet mass balance. The total mass loss increased from 40 ± 9 Gt/y in 1979-1990 to 50 ± 14 Gt/y in 1989-2000, 166 ± 18 Gt/y in 1999-2009, and 252 ± 26 Gt/y in 2009-2017. In 2009-2017, the mass loss was dominated by the Amundsen/Bellingshausen Sea sectors, in West Antarctica (159 ± 8 Gt/y), Wilkes Land, in East Antarctica (51 ± 13 Gt/y), and West and Northeast Peninsula (42 ± 5 Gt/y). The contribution to sea-level rise from Antarctica averaged 3.6 ± 0.5 mm per decade with a cumulative 14.0 ± 2.0 mm since 1979, including 6.9 ± 0.6 mm from West Antarctica, 4.4 ± 0.9 mm from East Antarctica, and 2.5 ± 0.4 mm from the Peninsula (i.e., East Antarctica is a major participant in the mass loss). During the entire period, the mass loss concentrated in areas closest to warm, salty, subsurface, circumpolar deep water (CDW), that is, consistent with enhanced polar westerlies pushing CDW toward Antarctica to melt its floating ice shelves, destabilize the glaciers, and raise sea level. |
format |
Article in Journal/Newspaper |
author |
Rignot, Eric Mouginot, Jeremie Scheuchl, Bernd van den Broeke, Michiel van Wessem, Melchior J Morlighem, Mathieu |
author_facet |
Rignot, Eric Mouginot, Jeremie Scheuchl, Bernd van den Broeke, Michiel van Wessem, Melchior J Morlighem, Mathieu |
author_sort |
Rignot, Eric |
title |
Four decades of Antarctic Ice Sheet mass balance from 1979-2017 |
title_short |
Four decades of Antarctic Ice Sheet mass balance from 1979-2017 |
title_full |
Four decades of Antarctic Ice Sheet mass balance from 1979-2017 |
title_fullStr |
Four decades of Antarctic Ice Sheet mass balance from 1979-2017 |
title_full_unstemmed |
Four decades of Antarctic Ice Sheet mass balance from 1979-2017 |
title_sort |
four decades of antarctic ice sheet mass balance from 1979-2017 |
publisher |
eScholarship, University of California |
publishDate |
2019 |
url |
http://www.escholarship.org/uc/item/68p1n8x1 |
op_coverage |
1095 - 1103 |
long_lat |
ENVELOPE(120.000,120.000,-69.000,-69.000) |
geographic |
Antarctic Bellingshausen Sea East Antarctica The Antarctic West Antarctica Wilkes Land |
geographic_facet |
Antarctic Bellingshausen Sea East Antarctica The Antarctic West Antarctica Wilkes Land |
genre |
Antarc* Antarctic Antarctica Bellingshausen Sea East Antarctica Ice Sheet Ice Shelves West Antarctica Wilkes Land |
genre_facet |
Antarc* Antarctic Antarctica Bellingshausen Sea East Antarctica Ice Sheet Ice Shelves West Antarctica Wilkes Land |
op_source |
Rignot, Eric; Mouginot, Jeremie; Scheuchl, Bernd; van den Broeke, Michiel; van Wessem, Melchior J; & Morlighem, Mathieu. (2019). Four decades of Antarctic Ice Sheet mass balance from 1979-2017. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 116(4), 1095 - 1103. doi:10.1073/pnas.1812883116. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/68p1n8x1 |
op_relation |
qt68p1n8x1 http://www.escholarship.org/uc/item/68p1n8x1 |
op_rights |
Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1073/pnas.1812883116 |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
116 |
container_issue |
4 |
container_start_page |
1095 |
op_container_end_page |
1103 |
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1766274118672449536 |