Antarctic Basal Water Storage Variation Inferred from Multi-Source Satellite Observation and Relevant Models
Antarctic basal water storage variation (BWSV) refers to mass changes of basal water beneath the Antarctic ice sheet (AIS). Identifying these variations is critical for understanding Antarctic basal hydrology variations and basal heat conduction, yet they are rarely accessible due to a lack of direc...
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ftdoajarticles:oai:doaj.org/article:2c00513ead23440b8b2c4c85a1849327 2023-05-15T13:23:52+02:00 Antarctic Basal Water Storage Variation Inferred from Multi-Source Satellite Observation and Relevant Models Jingyu Kang Yang Lu Yan Li Zizhan Zhang Hongling Shi 2022-05-01T00:00:00Z https://doi.org/10.3390/rs14102337 https://doaj.org/article/2c00513ead23440b8b2c4c85a1849327 EN eng MDPI AG https://www.mdpi.com/2072-4292/14/10/2337 https://doaj.org/toc/2072-4292 doi:10.3390/rs14102337 2072-4292 https://doaj.org/article/2c00513ead23440b8b2c4c85a1849327 Remote Sensing, Vol 14, Iss 2337, p 2337 (2022) Antarctica basal water variation multi-source satellite gravity inversion Science Q article 2022 ftdoajarticles https://doi.org/10.3390/rs14102337 2022-12-31T03:06:15Z Antarctic basal water storage variation (BWSV) refers to mass changes of basal water beneath the Antarctic ice sheet (AIS). Identifying these variations is critical for understanding Antarctic basal hydrology variations and basal heat conduction, yet they are rarely accessible due to a lack of direct observation. This paper proposes a layered gravity density forward/inversion iteration method to investigate Antarctic BWSV based on multi-source satellite observations and relevant models. During 2003–2009, BWSV increased at an average rate of 43 ± 23 Gt/yr, which accounts for 29% of the previously documented total mass loss rate (−76 ± 20 Gt/yr) of AIS. Major uncertainty arises from satellite gravimetry, satellite altimetry, the glacial isostatic adjustment (GIA) model, and the modelled basal melting rate. We find that increases in basal water mainly occurred in regions with widespread active subglacial lakes, such as the Rockefeller Plateau, Siple Coast, Institute Ice Stream regions, and marginal regions of East Antarctic Ice Sheet (EAIS), which indicates the increased water storage in these active subglacial lakes, despite the frequent water drainage events. The Amundsen Sea coast experienced a significant loss during the same period, which is attributed to the basal meltwater discharging into the Amundsen Sea through basal channels. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Antarctica Ice Sheet Institute Ice Stream Directory of Open Access Journals: DOAJ Articles Amundsen Sea Antarctic East Antarctic Ice Sheet Institute Ice Stream ENVELOPE(-75.000,-75.000,-82.000,-82.000) Rockefeller Plateau ENVELOPE(-135.000,-135.000,-80.000,-80.000) Siple ENVELOPE(-83.917,-83.917,-75.917,-75.917) Siple Coast ENVELOPE(-155.000,-155.000,-82.000,-82.000) The Antarctic Remote Sensing 14 10 2337 |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Antarctica basal water variation multi-source satellite gravity inversion Science Q |
spellingShingle |
Antarctica basal water variation multi-source satellite gravity inversion Science Q Jingyu Kang Yang Lu Yan Li Zizhan Zhang Hongling Shi Antarctic Basal Water Storage Variation Inferred from Multi-Source Satellite Observation and Relevant Models |
topic_facet |
Antarctica basal water variation multi-source satellite gravity inversion Science Q |
description |
Antarctic basal water storage variation (BWSV) refers to mass changes of basal water beneath the Antarctic ice sheet (AIS). Identifying these variations is critical for understanding Antarctic basal hydrology variations and basal heat conduction, yet they are rarely accessible due to a lack of direct observation. This paper proposes a layered gravity density forward/inversion iteration method to investigate Antarctic BWSV based on multi-source satellite observations and relevant models. During 2003–2009, BWSV increased at an average rate of 43 ± 23 Gt/yr, which accounts for 29% of the previously documented total mass loss rate (−76 ± 20 Gt/yr) of AIS. Major uncertainty arises from satellite gravimetry, satellite altimetry, the glacial isostatic adjustment (GIA) model, and the modelled basal melting rate. We find that increases in basal water mainly occurred in regions with widespread active subglacial lakes, such as the Rockefeller Plateau, Siple Coast, Institute Ice Stream regions, and marginal regions of East Antarctic Ice Sheet (EAIS), which indicates the increased water storage in these active subglacial lakes, despite the frequent water drainage events. The Amundsen Sea coast experienced a significant loss during the same period, which is attributed to the basal meltwater discharging into the Amundsen Sea through basal channels. |
format |
Article in Journal/Newspaper |
author |
Jingyu Kang Yang Lu Yan Li Zizhan Zhang Hongling Shi |
author_facet |
Jingyu Kang Yang Lu Yan Li Zizhan Zhang Hongling Shi |
author_sort |
Jingyu Kang |
title |
Antarctic Basal Water Storage Variation Inferred from Multi-Source Satellite Observation and Relevant Models |
title_short |
Antarctic Basal Water Storage Variation Inferred from Multi-Source Satellite Observation and Relevant Models |
title_full |
Antarctic Basal Water Storage Variation Inferred from Multi-Source Satellite Observation and Relevant Models |
title_fullStr |
Antarctic Basal Water Storage Variation Inferred from Multi-Source Satellite Observation and Relevant Models |
title_full_unstemmed |
Antarctic Basal Water Storage Variation Inferred from Multi-Source Satellite Observation and Relevant Models |
title_sort |
antarctic basal water storage variation inferred from multi-source satellite observation and relevant models |
publisher |
MDPI AG |
publishDate |
2022 |
url |
https://doi.org/10.3390/rs14102337 https://doaj.org/article/2c00513ead23440b8b2c4c85a1849327 |
long_lat |
ENVELOPE(-75.000,-75.000,-82.000,-82.000) ENVELOPE(-135.000,-135.000,-80.000,-80.000) ENVELOPE(-83.917,-83.917,-75.917,-75.917) ENVELOPE(-155.000,-155.000,-82.000,-82.000) |
geographic |
Amundsen Sea Antarctic East Antarctic Ice Sheet Institute Ice Stream Rockefeller Plateau Siple Siple Coast The Antarctic |
geographic_facet |
Amundsen Sea Antarctic East Antarctic Ice Sheet Institute Ice Stream Rockefeller Plateau Siple Siple Coast The Antarctic |
genre |
Amundsen Sea Antarc* Antarctic Antarctica Ice Sheet Institute Ice Stream |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctica Ice Sheet Institute Ice Stream |
op_source |
Remote Sensing, Vol 14, Iss 2337, p 2337 (2022) |
op_relation |
https://www.mdpi.com/2072-4292/14/10/2337 https://doaj.org/toc/2072-4292 doi:10.3390/rs14102337 2072-4292 https://doaj.org/article/2c00513ead23440b8b2c4c85a1849327 |
op_doi |
https://doi.org/10.3390/rs14102337 |
container_title |
Remote Sensing |
container_volume |
14 |
container_issue |
10 |
container_start_page |
2337 |
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1766375944878030848 |