The Cryosphere
The Cryosphere
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Articles | Volume 13, issue 3
Articles | Volume 13, issue 3
https://doi.org/10.5194/tc-13-981-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-13-981-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 13, issue 3
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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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.
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