Channelized melting drives thinning under a rapidly melting Antarctic ice shelf

Noel Gourmelen, Daniel Goldberg, Kate Snow, Sian Henley, Robert G. Bingham, Satoshi Kimura, Anna Hogg, Andrew Shepherd, Jeremie Mouginot, Jan T M Lenaerts, Stefan R. M. Ligtenberg, Willem Jan van de Berg

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Ice shelves play a vital role in regulating loss of grounded ice and in supplying freshwater to coastal seas. However, melt variability within ice shelves is poorly constrained and may be instrumental in driving ice shelf imbalance and collapse. High-resolution altimetry measurements from 2010 to 2016 show that Dotson Ice Shelf (DIS), West Antarctica, thins in response to basal melting focused along a single 5 km-wide and 60 km-long channel extending from the ice shelf's grounding zone to its calving front. If focused thinning continues at present rates, the channel will melt through, and the ice shelf collapse, within 40–50 years, almost two centuries before collapse is projected from the average thinning rate. Our findings provide evidence of basal melt-driven sub-ice shelf channel formation and its potential for accelerating the weakening of ice shelves.
Original languageEnglish
Pages (from-to)9796-9804
JournalGeophysical Research Letters
Volume44
Issue number19
Early online date10 Oct 2017
DOIs
Publication statusPublished - 27 Oct 2017

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