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 wi...
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ftzenodo:oai:zenodo.org:7811241 2023-05-15T14:14:00+02:00 Change in Antarctic Ice Shelf Area from 2009 to 2019 Andreasen, Julia R. Hogg, Anna E. Selley, Heather L. 2023-04-08 https://zenodo.org/record/7811241 https://doi.org/10.5281/zenodo.7811241 unknown doi:10.5194/egusphere-2022-1087 doi:10.5281/zenodo.7811240 https://zenodo.org/communities/scar https://zenodo.org/record/7811241 https://doi.org/10.5281/zenodo.7811241 oai:zenodo.org:7811241 info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/legalcode Antarctica Ice Shelf Remote Sensing Calving Front Manual Delineation info:eu-repo/semantics/other dataset 2023 ftzenodo https://doi.org/10.5281/zenodo.781124110.5194/egusphere-2022-108710.5281/zenodo.7811240 2023-04-11T23:02:51Z 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 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 area on the Antarctic Peninsula (6,692.5 km2) and West Antarctica (5,563.1 km2), has been outweighed by area growth in East Antarctica (3,532.1 km2) and the large Ross and Ronne-Filchner Ice Shelves (14,027.9 km2). The largest retreat was observed on Larsen-C Ice Shelf where 5,916.6 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 gradual advance over the past decade (535.3 km2/yr) led to a 5,888.6 km2 area gain from 2009–2019. Overall, the Antarctic Ice Shelf area has grown by 5,304.5 km2 since 2009, with 18 ice shelves retreating and 16 larger shelves growing in area. Our observations show that Antarctic Ice Shelves gained 660.6 Gt of ice mass over the 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. Dataset Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica Ice Sheet Ice Shelf Ice Shelves Ronne Ice Shelf West Antarctica Zenodo Antarctic The Antarctic Antarctic Peninsula East Antarctica West Antarctica Ronne Ice Shelf ENVELOPE(-61.000,-61.000,-78.500,-78.500) |
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Open Polar |
collection |
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op_collection_id |
ftzenodo |
language |
unknown |
topic |
Antarctica Ice Shelf Remote Sensing Calving Front Manual Delineation |
spellingShingle |
Antarctica Ice Shelf Remote Sensing Calving Front Manual Delineation Andreasen, Julia R. Hogg, Anna E. Selley, Heather L. Change in Antarctic Ice Shelf Area from 2009 to 2019 |
topic_facet |
Antarctica Ice Shelf Remote Sensing Calving Front Manual Delineation |
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 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 area on the Antarctic Peninsula (6,692.5 km2) and West Antarctica (5,563.1 km2), has been outweighed by area growth in East Antarctica (3,532.1 km2) and the large Ross and Ronne-Filchner Ice Shelves (14,027.9 km2). The largest retreat was observed on Larsen-C Ice Shelf where 5,916.6 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 gradual advance over the past decade (535.3 km2/yr) led to a 5,888.6 km2 area gain from 2009–2019. Overall, the Antarctic Ice Shelf area has grown by 5,304.5 km2 since 2009, with 18 ice shelves retreating and 16 larger shelves growing in area. Our observations show that Antarctic Ice Shelves gained 660.6 Gt of ice mass over the 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 |
Dataset |
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 |
publishDate |
2023 |
url |
https://zenodo.org/record/7811241 https://doi.org/10.5281/zenodo.7811241 |
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 West Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica East Antarctica Ice Sheet Ice Shelf Ice Shelves Ronne Ice Shelf West Antarctica |
op_relation |
doi:10.5194/egusphere-2022-1087 doi:10.5281/zenodo.7811240 https://zenodo.org/communities/scar https://zenodo.org/record/7811241 https://doi.org/10.5281/zenodo.7811241 oai:zenodo.org:7811241 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/legalcode |
op_doi |
https://doi.org/10.5281/zenodo.781124110.5194/egusphere-2022-108710.5281/zenodo.7811240 |
_version_ |
1766286510566408192 |