Mass Balance of the Antarctic Ice Sheet in the Early 21st Century
Mass loss from the Antarctic Ice Sheet (AIS) is an important contributor to global sea level rise. To examine the recent ice loss, we estimated the mass budget of the AIS from 2000 to 2020 using multiple ice velocity datasets, state-of-the-art ice thickness datasets, and extended surface mass balanc...
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ftmdpi:oai:mdpi.com:/2072-4292/15/6/1677/ 2023-08-20T03:59:36+02:00 Mass Balance of the Antarctic Ice Sheet in the Early 21st Century Tian Yang Qi Liang Lei Zheng Teng Li Zhuoqi Chen Fengming Hui Xiao Cheng agris 2023-03-20 application/pdf https://doi.org/10.3390/rs15061677 EN eng Multidisciplinary Digital Publishing Institute Remote Sensing in Geology, Geomorphology and Hydrology https://dx.doi.org/10.3390/rs15061677 https://creativecommons.org/licenses/by/4.0/ Remote Sensing; Volume 15; Issue 6; Pages: 1677 mass balance ice discharge Antarctic Ice Sheet input-output method Text 2023 ftmdpi https://doi.org/10.3390/rs15061677 2023-08-01T09:21:18Z Mass loss from the Antarctic Ice Sheet (AIS) is an important contributor to global sea level rise. To examine the recent ice loss, we estimated the mass budget of the AIS from 2000 to 2020 using multiple ice velocity datasets, state-of-the-art ice thickness datasets, and extended surface mass balance (SMB) records. The AIS lost mass at an average rate of −89 ± 99 Gt/yr over the study period. The East Antarctic Ice Sheet (EAIS) showed a slightly positive mass balance, while the West Antarctic Ice Sheet (WAIS) experienced a significant acceleration in mass loss. The ice discharge from the AIS increased from 1792 ± 47 Gt/yr in 2000 to 1940 ± 37 Gt/yr in 2017–2020, with the increase in the discharge from the WAIS being three to four times higher than that from the EAIS. Moreover, the average mass balance for 2017–2020 was −99 ± 93 Gt/yr, slightly more negative than the average for the early 21st Century. During this recent period, the ice discharge decreased in the East Indian Ocean sector, in contrast to its rapid increase from 2000 to 2013–2017. However, the discharge in the Amundsen Sea sector still greatly increased from 2013–2017 to 2017–2020. Overall, our results are in agreement with recent mass balance estimates for the AIS based on gravimetry and altimetry. Our assessments of the recent AIS mass balance with the mass budget method (input-output method) will contribute to the understanding of ice dynamic processes and provide insights into the stability of the AIS. Text Amundsen Sea Antarc* Antarctic Ice Sheet MDPI Open Access Publishing Antarctic The Antarctic Amundsen Sea West Antarctic Ice Sheet East Antarctic Ice Sheet Indian Remote Sensing 15 6 1677 |
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Open Polar |
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MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
mass balance ice discharge Antarctic Ice Sheet input-output method |
spellingShingle |
mass balance ice discharge Antarctic Ice Sheet input-output method Tian Yang Qi Liang Lei Zheng Teng Li Zhuoqi Chen Fengming Hui Xiao Cheng Mass Balance of the Antarctic Ice Sheet in the Early 21st Century |
topic_facet |
mass balance ice discharge Antarctic Ice Sheet input-output method |
description |
Mass loss from the Antarctic Ice Sheet (AIS) is an important contributor to global sea level rise. To examine the recent ice loss, we estimated the mass budget of the AIS from 2000 to 2020 using multiple ice velocity datasets, state-of-the-art ice thickness datasets, and extended surface mass balance (SMB) records. The AIS lost mass at an average rate of −89 ± 99 Gt/yr over the study period. The East Antarctic Ice Sheet (EAIS) showed a slightly positive mass balance, while the West Antarctic Ice Sheet (WAIS) experienced a significant acceleration in mass loss. The ice discharge from the AIS increased from 1792 ± 47 Gt/yr in 2000 to 1940 ± 37 Gt/yr in 2017–2020, with the increase in the discharge from the WAIS being three to four times higher than that from the EAIS. Moreover, the average mass balance for 2017–2020 was −99 ± 93 Gt/yr, slightly more negative than the average for the early 21st Century. During this recent period, the ice discharge decreased in the East Indian Ocean sector, in contrast to its rapid increase from 2000 to 2013–2017. However, the discharge in the Amundsen Sea sector still greatly increased from 2013–2017 to 2017–2020. Overall, our results are in agreement with recent mass balance estimates for the AIS based on gravimetry and altimetry. Our assessments of the recent AIS mass balance with the mass budget method (input-output method) will contribute to the understanding of ice dynamic processes and provide insights into the stability of the AIS. |
format |
Text |
author |
Tian Yang Qi Liang Lei Zheng Teng Li Zhuoqi Chen Fengming Hui Xiao Cheng |
author_facet |
Tian Yang Qi Liang Lei Zheng Teng Li Zhuoqi Chen Fengming Hui Xiao Cheng |
author_sort |
Tian Yang |
title |
Mass Balance of the Antarctic Ice Sheet in the Early 21st Century |
title_short |
Mass Balance of the Antarctic Ice Sheet in the Early 21st Century |
title_full |
Mass Balance of the Antarctic Ice Sheet in the Early 21st Century |
title_fullStr |
Mass Balance of the Antarctic Ice Sheet in the Early 21st Century |
title_full_unstemmed |
Mass Balance of the Antarctic Ice Sheet in the Early 21st Century |
title_sort |
mass balance of the antarctic ice sheet in the early 21st century |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2023 |
url |
https://doi.org/10.3390/rs15061677 |
op_coverage |
agris |
geographic |
Antarctic The Antarctic Amundsen Sea West Antarctic Ice Sheet East Antarctic Ice Sheet Indian |
geographic_facet |
Antarctic The Antarctic Amundsen Sea West Antarctic Ice Sheet East Antarctic Ice Sheet Indian |
genre |
Amundsen Sea Antarc* Antarctic Ice Sheet |
genre_facet |
Amundsen Sea Antarc* Antarctic Ice Sheet |
op_source |
Remote Sensing; Volume 15; Issue 6; Pages: 1677 |
op_relation |
Remote Sensing in Geology, Geomorphology and Hydrology https://dx.doi.org/10.3390/rs15061677 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/rs15061677 |
container_title |
Remote Sensing |
container_volume |
15 |
container_issue |
6 |
container_start_page |
1677 |
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