Large interannual variability in supraglacial lakes around East Antarctica

Arthur, Jennifer F. and Stokes, Chris R. and Jamieson, Stewart S. R. and Carr, J. Rachel and Leeson, Amber and Verjans, Vincent (2022) Large interannual variability in supraglacial lakes around East Antarctica. Nature Communications, 13 (1). ISSN 2041-1723

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Abstract

Antarctic supraglacial lakes (SGLs) have been linked to ice shelf collapse and the subsequent acceleration of inland ice flow, but observations of SGLs remain relatively scarce and their interannual variability is largely unknown. This makes it difficult to assess whether some ice shelves are close to thresholds of stability under climate warming. Here, we present the first observations of SGLs across the entire East Antarctic Ice Sheet over multiple melt seasons (2014–2020). Interannual variability in SGL volume is >200% on some ice shelves, but patterns are highly asynchronous. More extensive, deeper SGLs correlate with higher summer (December-January-February) air temperatures, but comparisons with modelled melt and runoff are complex. However, we find that modelled January melt and the ratio of November firn air content to summer melt are important predictors of SGL volume on some potentially vulnerable ice shelves, suggesting large increases in SGLs should be expected under future atmospheric warming.

Item Type:
Journal Article
Journal or Publication Title:
Nature Communications
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100
Subjects:
ID Code:
168309
Deposited By:
Deposited On:
04 Apr 2022 10:10
Refereed?:
Yes
Published?:
Published
Last Modified:
04 May 2022 02:53