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  • Presentation | C21F: Remote Sensing of the Cryosphere: Glaciers and Ice Sheets III Poster
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  • C21F-0916: New Catalog of Thwaites Glacier Subglacial Lakes and Their Activity Revealed by CryoSat-2 Altimetry
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  • Board 0916‚ Hall EFG (Poster Hall)
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Author(s):
Byeong-Hoon Kim, Chonnam National University (First Author, Presenting Author)
Choon-Ki Lee, Korea Polar Research Institute
Ki-Weon Seo, Seoul National University
Won Sang Lee, Korea Polar Research Institute
Jeong-Won Park, Korea Polar Research Institute


Previously, seven active subglacial lakes (lakes beneath the ice) were identified within Thwaites Glacier in Antarctica, a region undergoing rapid ice loss. Reassessing satellite data, we detect 27 lakes, including lakes previously identified by Smith et al. (2017), https://doi.org/10.5194/tc-11-451-2017 and Hoffman et al. (2020), https://doi.org/10.5194/tc-14-4603-2020. Some newly identified lakes are positioned even farther downstream, and one (TM25) began its activity about 3 months earlier in 2013 than the previously earliest identified lake. Contrary to the previously understood simple upstream-to-downstream progression within the glacier, our findings indicate a more complex propagation pattern of lake activities, featuring both upstream and downstream directions. We notice the changes in ice speed are possibly related to the lake activities but their impacts appear limited, irrespective of drainage volumes.



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