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  Interannual variation of modified Circumpolar Deep Water volume in the Dotson-Getz Trough, West Antarctica

Kim, T.-W., Yang, H., Kim, Y., Yoo, J., Park, J. (2023): Interannual variation of modified Circumpolar Deep Water volume in the Dotson-Getz Trough, West Antarctica, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-0761

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Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016716 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016716_3
Genre: Conference Paper

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Kim, Tae-Wan1, Author
Yang, Heewon1, Author
Kim, Yeonggi1, Author
Yoo, Jaeill1, Author
Park, Jisoo1, Author
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

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 Abstract: In recent decades, wide-spread thinning of ice shelves in the Amundsen Sea has been recorded driven by basal melting. Relatively warm modified Circumpolar Deep Water (mCDW) flows onto the continental shelf and fills the Dotson-Getz Trough (DGT) and reaches the base of the Dotson Ice Shelf (DIS). Long-term hydrographic data (2007–2018) for the DGT were obtained during seven oceanographic surveys to study the interannual variation in mCDW volume and properties in the DGT and their causes. Although the mCDW volume showed relatively weak interannual variations at the entrance of the DGT, these variations intensified in front of the DIS. There, the mCDW volume was ~8 × 103 km3 in 2007, rapidly decreased to 4.7 × 103 km3 in 2014 before rebounding to 7.3 × 103 km3 in 2018. Such interannual variability appears to result from local Ekman pumping along the DGT, with the dominant south-southeast wind modulating the amplitude of Ekman upwelling along the eastern boundary of the Amundsen Sea polynya during the austral summers of the surveyed years. We note a strong correlation between the wind variability and the longitudinal location of the Amundsen Sea Low.

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Language(s): eng - English
 Dates: 2023
 Publication Status: Finally published
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 Identifiers: DOI: 10.57757/IUGG23-0761
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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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