Antarctic surface water intrusion triggering seasonal rapid basal melting of drygalski ice tongue, east Antarctica
Antarctic glaciers are losing ice rapidly to the ocean through basal melting of ice shelves/tongues. To better predicate future sea level rise, it is urgent to detect the rapid basal melting of ice shelves/tongues as well as ocean’s role in this process. In this study, basal melting of Drygalski Ice...
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_5017985 2023-10-09T21:45:47+02:00 Antarctic surface water intrusion triggering seasonal rapid basal melting of drygalski ice tongue, east Antarctica Wang, X. Nicholls, K. Lee, W. Lee, C. Stevens, C. Holland, D. 2023 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017985 eng eng info:eu-repo/semantics/altIdentifier/doi/10.57757/IUGG23-1619 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017985 XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) info:eu-repo/semantics/conferenceObject 2023 ftgfzpotsdam https://doi.org/10.57757/IUGG23-1619 2023-09-17T23:43:20Z Antarctic glaciers are losing ice rapidly to the ocean through basal melting of ice shelves/tongues. To better predicate future sea level rise, it is urgent to detect the rapid basal melting of ice shelves/tongues as well as ocean’s role in this process. In this study, basal melting of Drygalski Ice Tongue (DIT), the seaward extension of David Glacier in Northern Victoria Land, East Antarctica has been detected using a surface deployed Autonomous Phase-sensitive Radio-Echo-Sounder (ApRES). The ocean water changes adjacent to DIT front has been revealed using an ocean mooring. ApRES observation suggests a rapid basal melting > 10 m/a close to DIT front in February and mooring data shows a synchronous ocean warming in austral summer, indicating Antarctica Surface Water intrusion to the base of DIT. The mooring data has been used to simulate the basal melting of DIT front, which coincides with ApRES measurements. We conclude that rapid basal melting close to the tongue front was likely triggered by intrusion of Antarctica Surface Water in austral summer. Glacier-ocean interactions, such as glacier basal melting, can be detected from spaceborne, terrestrial and oceanic observations and are important processes to predict future sea level changes. To better understand the driving forces of glacier changes, multi-disciplinary observation and numerical modeling are required. Conference Object Antarc* Antarctic Antarctica David Glacier East Antarctica Ice Shelves Victoria Land GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Antarctic Austral David Glacier ENVELOPE(160.000,160.000,-75.333,-75.333) Drygalski ENVELOPE(-61.000,-61.000,-64.717,-64.717) Drygalski Ice Tongue ENVELOPE(163.500,163.500,-75.400,-75.400) East Antarctica Victoria Land |
institution |
Open Polar |
collection |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
English |
description |
Antarctic glaciers are losing ice rapidly to the ocean through basal melting of ice shelves/tongues. To better predicate future sea level rise, it is urgent to detect the rapid basal melting of ice shelves/tongues as well as ocean’s role in this process. In this study, basal melting of Drygalski Ice Tongue (DIT), the seaward extension of David Glacier in Northern Victoria Land, East Antarctica has been detected using a surface deployed Autonomous Phase-sensitive Radio-Echo-Sounder (ApRES). The ocean water changes adjacent to DIT front has been revealed using an ocean mooring. ApRES observation suggests a rapid basal melting > 10 m/a close to DIT front in February and mooring data shows a synchronous ocean warming in austral summer, indicating Antarctica Surface Water intrusion to the base of DIT. The mooring data has been used to simulate the basal melting of DIT front, which coincides with ApRES measurements. We conclude that rapid basal melting close to the tongue front was likely triggered by intrusion of Antarctica Surface Water in austral summer. Glacier-ocean interactions, such as glacier basal melting, can be detected from spaceborne, terrestrial and oceanic observations and are important processes to predict future sea level changes. To better understand the driving forces of glacier changes, multi-disciplinary observation and numerical modeling are required. |
format |
Conference Object |
author |
Wang, X. Nicholls, K. Lee, W. Lee, C. Stevens, C. Holland, D. |
spellingShingle |
Wang, X. Nicholls, K. Lee, W. Lee, C. Stevens, C. Holland, D. Antarctic surface water intrusion triggering seasonal rapid basal melting of drygalski ice tongue, east Antarctica |
author_facet |
Wang, X. Nicholls, K. Lee, W. Lee, C. Stevens, C. Holland, D. |
author_sort |
Wang, X. |
title |
Antarctic surface water intrusion triggering seasonal rapid basal melting of drygalski ice tongue, east Antarctica |
title_short |
Antarctic surface water intrusion triggering seasonal rapid basal melting of drygalski ice tongue, east Antarctica |
title_full |
Antarctic surface water intrusion triggering seasonal rapid basal melting of drygalski ice tongue, east Antarctica |
title_fullStr |
Antarctic surface water intrusion triggering seasonal rapid basal melting of drygalski ice tongue, east Antarctica |
title_full_unstemmed |
Antarctic surface water intrusion triggering seasonal rapid basal melting of drygalski ice tongue, east Antarctica |
title_sort |
antarctic surface water intrusion triggering seasonal rapid basal melting of drygalski ice tongue, east antarctica |
publishDate |
2023 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017985 |
long_lat |
ENVELOPE(160.000,160.000,-75.333,-75.333) ENVELOPE(-61.000,-61.000,-64.717,-64.717) ENVELOPE(163.500,163.500,-75.400,-75.400) |
geographic |
Antarctic Austral David Glacier Drygalski Drygalski Ice Tongue East Antarctica Victoria Land |
geographic_facet |
Antarctic Austral David Glacier Drygalski Drygalski Ice Tongue East Antarctica Victoria Land |
genre |
Antarc* Antarctic Antarctica David Glacier East Antarctica Ice Shelves Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica David Glacier East Antarctica Ice Shelves Victoria Land |
op_source |
XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.57757/IUGG23-1619 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017985 |
op_doi |
https://doi.org/10.57757/IUGG23-1619 |
_version_ |
1779321447125090304 |