Channelized Melting Drives Thinning Under a Rapidly Melting Antarctic Ice Shelf - Archive ouverte HAL Access content directly
Journal Articles Geophysical Research Letters Year : 2017

Channelized Melting Drives Thinning Under a Rapidly Melting Antarctic Ice Shelf

(1) , , , , , , , , , , ,
1
Dan N. Goldberg
  • Function : Author
Kate Snow
  • Function : Author
Sian F. Henley
  • Function : Author
Robert G. Bingham
  • Function : Author
Satoshi Kimura
  • Function : Author
Anna E. Hogg
  • Function : Author
Andrew Shepherd
  • Function : Author
Jeremie Mouginot
  • Function : Author
Jan T. M. Lenaerts
  • Function : Author
Stefan R. M. Ligtenberg
  • Function : Author
Willem Jan van de Berg
  • Function : Author

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.
Fichier principal
Vignette du fichier
Geophysical Research Letters - 2017 - Gourmelen - Channelized Melting Drives Thinning Under a Rapidly Melting Antarctic Ice.pdf (1.76 Mo) Télécharger le fichier
Origin : Publisher files allowed on an open archive

Dates and versions

insu-03707642 , version 1 (29-06-2022)

Licence

Copyright

Identifiers

Cite

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⟩
5 View
28 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More