Articles | Volume 13, issue 3
https://doi.org/10.5194/tc-13-981-2019
https://doi.org/10.5194/tc-13-981-2019
Research article
 | 
22 Mar 2019
Research article |  | 22 Mar 2019

Ice-stream flow switching by up-ice propagation of instabilities along glacial marginal troughs

Etienne Brouard and Patrick Lajeunesse

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Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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AR: Author's response | RR: Referee report | ED: Editor decision
AR by Etienne Brouard on behalf of the Authors (23 Jan 2019)  Author's response   Manuscript 
ED: Referee Nomination & Report Request started (30 Jan 2019) by Chris R. Stokes
RR by Anonymous Referee #2 (15 Feb 2019)
ED: Publish subject to minor revisions (review by editor) (19 Feb 2019) by Chris R. Stokes
AR by Etienne Brouard on behalf of the Authors (27 Feb 2019)  Author's response   Manuscript 
ED: Publish as is (05 Mar 2019) by Chris R. Stokes
AR by Etienne Brouard on behalf of the Authors (05 Mar 2019)  Manuscript 
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Short summary
Modifications in ice-stream networks have major impacts on ice sheet mass balance and global sea level. However, the mechanisms controlling ice-stream switching remain poorly understood. We report a flow switch in an ice-stream system that occurred on the Baffin Island shelf through the erosion of a marginal trough. Up-ice propagation of ice streams through marginal troughs can lead to the piracy of neighboring ice catchments, which induces an adjacent ice-stream switch and shutdown.