Trends in Antarctic Ice Sheet Elevation and Mass
Fluctuations in Antarctic Ice Sheet elevation and mass occur over a variety of time scales, owing to changes in snowfall and ice flow. Here we disentangle these signals by combining 25 years of satellite radar altimeter observations and a regional climate model. From these measurements, patterns of...
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Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9285922/ http://www.ncbi.nlm.nih.gov/pubmed/35866175 https://doi.org/10.1029/2019GL082182 |
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ftpubmed:oai:pubmedcentral.nih.gov:9285922 2023-05-15T13:50:20+02:00 Trends in Antarctic Ice Sheet Elevation and Mass Shepherd, Andrew Gilbert, Lin Muir, Alan S. Konrad, Hannes McMillan, Malcolm Slater, Thomas Briggs, Kate H. Sundal, Aud V. Hogg, Anna E. Engdahl, Marcus E. 2019-07-24 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9285922/ http://www.ncbi.nlm.nih.gov/pubmed/35866175 https://doi.org/10.1029/2019GL082182 en eng John Wiley and Sons Inc. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9285922/ http://www.ncbi.nlm.nih.gov/pubmed/35866175 http://dx.doi.org/10.1029/2019GL082182 ©2019. The Authors. https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. CC-BY Geophys Res Lett Research Letters Text 2019 ftpubmed https://doi.org/10.1029/2019GL082182 2022-07-31T01:42:22Z Fluctuations in Antarctic Ice Sheet elevation and mass occur over a variety of time scales, owing to changes in snowfall and ice flow. Here we disentangle these signals by combining 25 years of satellite radar altimeter observations and a regional climate model. From these measurements, patterns of change that are strongly associated with glaciological events emerge. While the majority of the ice sheet has remained stable, 24% of West Antarctica is now in a state of dynamical imbalance. Thinning of the Pine Island and Thwaites glacier basins reaches 122 m in places, and their rates of ice loss are now five times greater than at the start of our survey. By partitioning elevation changes into areas of snow and ice variability, we estimate that East and West Antarctica have contributed −1.1 ± 0.4 and +5.7 ± 0.8 mm to global sea level between 1992 and 2017. Text Antarc* Antarctic Antarctica Ice Sheet Pine Island Thwaites Glacier West Antarctica PubMed Central (PMC) Antarctic Thwaites Glacier ENVELOPE(-106.750,-106.750,-75.500,-75.500) West Antarctica Geophysical Research Letters 46 14 8174 8183 |
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Research Letters |
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Research Letters Shepherd, Andrew Gilbert, Lin Muir, Alan S. Konrad, Hannes McMillan, Malcolm Slater, Thomas Briggs, Kate H. Sundal, Aud V. Hogg, Anna E. Engdahl, Marcus E. Trends in Antarctic Ice Sheet Elevation and Mass |
topic_facet |
Research Letters |
description |
Fluctuations in Antarctic Ice Sheet elevation and mass occur over a variety of time scales, owing to changes in snowfall and ice flow. Here we disentangle these signals by combining 25 years of satellite radar altimeter observations and a regional climate model. From these measurements, patterns of change that are strongly associated with glaciological events emerge. While the majority of the ice sheet has remained stable, 24% of West Antarctica is now in a state of dynamical imbalance. Thinning of the Pine Island and Thwaites glacier basins reaches 122 m in places, and their rates of ice loss are now five times greater than at the start of our survey. By partitioning elevation changes into areas of snow and ice variability, we estimate that East and West Antarctica have contributed −1.1 ± 0.4 and +5.7 ± 0.8 mm to global sea level between 1992 and 2017. |
format |
Text |
author |
Shepherd, Andrew Gilbert, Lin Muir, Alan S. Konrad, Hannes McMillan, Malcolm Slater, Thomas Briggs, Kate H. Sundal, Aud V. Hogg, Anna E. Engdahl, Marcus E. |
author_facet |
Shepherd, Andrew Gilbert, Lin Muir, Alan S. Konrad, Hannes McMillan, Malcolm Slater, Thomas Briggs, Kate H. Sundal, Aud V. Hogg, Anna E. Engdahl, Marcus E. |
author_sort |
Shepherd, Andrew |
title |
Trends in Antarctic Ice Sheet Elevation and Mass |
title_short |
Trends in Antarctic Ice Sheet Elevation and Mass |
title_full |
Trends in Antarctic Ice Sheet Elevation and Mass |
title_fullStr |
Trends in Antarctic Ice Sheet Elevation and Mass |
title_full_unstemmed |
Trends in Antarctic Ice Sheet Elevation and Mass |
title_sort |
trends in antarctic ice sheet elevation and mass |
publisher |
John Wiley and Sons Inc. |
publishDate |
2019 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9285922/ http://www.ncbi.nlm.nih.gov/pubmed/35866175 https://doi.org/10.1029/2019GL082182 |
long_lat |
ENVELOPE(-106.750,-106.750,-75.500,-75.500) |
geographic |
Antarctic Thwaites Glacier West Antarctica |
geographic_facet |
Antarctic Thwaites Glacier West Antarctica |
genre |
Antarc* Antarctic Antarctica Ice Sheet Pine Island Thwaites Glacier West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Pine Island Thwaites Glacier West Antarctica |
op_source |
Geophys Res Lett |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9285922/ http://www.ncbi.nlm.nih.gov/pubmed/35866175 http://dx.doi.org/10.1029/2019GL082182 |
op_rights |
©2019. The Authors. https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/2019GL082182 |
container_title |
Geophysical Research Letters |
container_volume |
46 |
container_issue |
14 |
container_start_page |
8174 |
op_container_end_page |
8183 |
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1766253364619771904 |