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  Antarctic surface water intrusion triggering seasonal rapid basal melting of drygalski ice tongue, east Antarctica

Wang, X., Nicholls, K., Lee, W. S., Lee, C. K., Stevens, C., Holland, D. (2023): Antarctic surface water intrusion triggering seasonal rapid basal melting of drygalski ice tongue, east Antarctica, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-1619

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Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017985 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017985_2
Genre: Conference Paper

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Wang, Xianwei1, Author
Nicholls, Keith1, Author
Lee, Won Sang1, Author
Lee, Choon Ki1, Author
Stevens, Craig1, Author
Holland, David1, Author
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

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 Abstract: 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.

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Language(s): eng - English
 Dates: 2023
 Publication Status: Finally published
 Pages: -
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 Rev. Type: -
 Identifiers: DOI: 10.57757/IUGG23-1619
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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Place of Event: Berlin
Start-/End Date: 2023-07-11 - 2023-07-20

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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Source Genre: Proceedings
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Publ. Info: Potsdam : GFZ German Research Centre for Geosciences
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