Change in Antarctic ice shelf area from 2009 to 2019
Antarctic ice shelves provide buttressing support to the ice sheet, stabilising the flow of grounded ice and its contribution to global sea levels. Over the past 50 years, satellite observations have shown ice shelves collapse, thin, and retreat; however, there are few measurements of the Antarctic-...
Published in: | The Cryosphere |
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Language: | English |
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Copernicus Publications
2023
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00066492 2023-07-16T03:54:38+02:00 Change in Antarctic ice shelf area from 2009 to 2019 Andreasen, Julia R. Hogg, Anna E. Selley, Heather L. 2023-05 electronic https://doi.org/10.5194/tc-17-2059-2023 https://noa.gwlb.de/receive/cop_mods_00066492 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00064976/tc-17-2059-2023.pdf https://tc.copernicus.org/articles/17/2059/2023/tc-17-2059-2023.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-17-2059-2023 https://noa.gwlb.de/receive/cop_mods_00066492 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00064976/tc-17-2059-2023.pdf https://tc.copernicus.org/articles/17/2059/2023/tc-17-2059-2023.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2023 ftnonlinearchiv https://doi.org/10.5194/tc-17-2059-2023 2023-06-25T23:18:51Z Antarctic ice shelves provide buttressing support to the ice sheet, stabilising the flow of grounded ice and its contribution to global sea levels. Over the past 50 years, satellite observations have shown ice shelves collapse, thin, and retreat; however, there are few measurements of the Antarctic-wide change in ice shelf area. Here, we use MODIS (Moderate Resolution Imaging Spectroradiometer) satellite data to measure the change in ice shelf calving front position and area on 34 ice shelves in Antarctica from 2009 to 2019. Over the last decade, a reduction in the area on the Antarctic Peninsula (6693 km2) and West Antarctica (5563 km2) has been outweighed by area growth in East Antarctica (3532 km2) and the large Ross and Ronne–Filchner ice shelves (14 028 km2). The largest retreat was observed on the Larsen C Ice Shelf, where 5917 km2 of ice was lost during an individual calving event in 2017, and the largest area increase was observed on Ronne Ice Shelf in East Antarctica, where a gradual advance over the past decade (535 km2 yr−1) led to a 5889 km2 area gain from 2009 to 2019. Overall, the Antarctic ice shelf area has grown by 5305 km2 since 2009, with 18 ice shelves retreating and 16 larger shelves growing in area. Our observations show that Antarctic ice shelves gained 661 Gt of ice mass over the past decade, whereas the steady-state approach would estimate substantial ice loss over the same period, demonstrating the importance of using time-variable calving flux observations to measure change. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica Ice Sheet Ice Shelf Ice Shelves Ronne Ice Shelf The Cryosphere West Antarctica Niedersächsisches Online-Archiv NOA Antarctic The Antarctic Antarctic Peninsula East Antarctica West Antarctica Ronne Ice Shelf ENVELOPE(-61.000,-61.000,-78.500,-78.500) The Cryosphere 17 5 2059 2072 |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Andreasen, Julia R. Hogg, Anna E. Selley, Heather L. Change in Antarctic ice shelf area from 2009 to 2019 |
topic_facet |
article Verlagsveröffentlichung |
description |
Antarctic ice shelves provide buttressing support to the ice sheet, stabilising the flow of grounded ice and its contribution to global sea levels. Over the past 50 years, satellite observations have shown ice shelves collapse, thin, and retreat; however, there are few measurements of the Antarctic-wide change in ice shelf area. Here, we use MODIS (Moderate Resolution Imaging Spectroradiometer) satellite data to measure the change in ice shelf calving front position and area on 34 ice shelves in Antarctica from 2009 to 2019. Over the last decade, a reduction in the area on the Antarctic Peninsula (6693 km2) and West Antarctica (5563 km2) has been outweighed by area growth in East Antarctica (3532 km2) and the large Ross and Ronne–Filchner ice shelves (14 028 km2). The largest retreat was observed on the Larsen C Ice Shelf, where 5917 km2 of ice was lost during an individual calving event in 2017, and the largest area increase was observed on Ronne Ice Shelf in East Antarctica, where a gradual advance over the past decade (535 km2 yr−1) led to a 5889 km2 area gain from 2009 to 2019. Overall, the Antarctic ice shelf area has grown by 5305 km2 since 2009, with 18 ice shelves retreating and 16 larger shelves growing in area. Our observations show that Antarctic ice shelves gained 661 Gt of ice mass over the past decade, whereas the steady-state approach would estimate substantial ice loss over the same period, demonstrating the importance of using time-variable calving flux observations to measure change. |
format |
Article in Journal/Newspaper |
author |
Andreasen, Julia R. Hogg, Anna E. Selley, Heather L. |
author_facet |
Andreasen, Julia R. Hogg, Anna E. Selley, Heather L. |
author_sort |
Andreasen, Julia R. |
title |
Change in Antarctic ice shelf area from 2009 to 2019 |
title_short |
Change in Antarctic ice shelf area from 2009 to 2019 |
title_full |
Change in Antarctic ice shelf area from 2009 to 2019 |
title_fullStr |
Change in Antarctic ice shelf area from 2009 to 2019 |
title_full_unstemmed |
Change in Antarctic ice shelf area from 2009 to 2019 |
title_sort |
change in antarctic ice shelf area from 2009 to 2019 |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/tc-17-2059-2023 https://noa.gwlb.de/receive/cop_mods_00066492 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00064976/tc-17-2059-2023.pdf https://tc.copernicus.org/articles/17/2059/2023/tc-17-2059-2023.pdf |
long_lat |
ENVELOPE(-61.000,-61.000,-78.500,-78.500) |
geographic |
Antarctic The Antarctic Antarctic Peninsula East Antarctica West Antarctica Ronne Ice Shelf |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula East Antarctica West Antarctica Ronne Ice Shelf |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica Ice Sheet Ice Shelf Ice Shelves Ronne Ice Shelf The Cryosphere West Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica Ice Sheet Ice Shelf Ice Shelves Ronne Ice Shelf The Cryosphere West Antarctica |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-17-2059-2023 https://noa.gwlb.de/receive/cop_mods_00066492 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00064976/tc-17-2059-2023.pdf https://tc.copernicus.org/articles/17/2059/2023/tc-17-2059-2023.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-17-2059-2023 |
container_title |
The Cryosphere |
container_volume |
17 |
container_issue |
5 |
container_start_page |
2059 |
op_container_end_page |
2072 |
_version_ |
1771540893281550336 |