Skip to Main content Skip to Navigation
Journal articles

Channelized Melting Drives Thinning Under a Rapidly Melting Antarctic Ice Shelf

Abstract : 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.
Document type :
Journal articles
Complete list of metadata

https://hal-insu.archives-ouvertes.fr/insu-03707642
Contributor : Nathalie POTHIER Connect in order to contact the contributor
Submitted on : Wednesday, June 29, 2022 - 7:32:50 AM
Last modification on : Wednesday, June 29, 2022 - 7:32:52 AM

File

Geophysical Research Letters -...
Publisher files allowed on an open archive

Licence

Copyright

Identifiers

Collections

Citation

Noel Gourmelen, Dan N. Goldberg, Kate Snow, Sian F. Henley, Robert G. Bingham, et al.. Channelized Melting Drives Thinning Under a Rapidly Melting Antarctic Ice Shelf. Geophysical Research Letters, 2017, 44, pp.9796-9804. ⟨10.1002/2017GL074929⟩. ⟨insu-03707642⟩

Share

Metrics

Record views

0

Files downloads

0