The Cryosphere
The Cryosphere
TC
Articles | Volume 20, issue 4
Articles | Volume 20, issue 4
https://doi.org/10.5194/tc-20-2099-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-20-2099-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 20, issue 4
Research article
 | 
15 Apr 2026
Research article |  | 15 Apr 2026

High spatio-temporal velocity variations driven by water input at a Greenlandic tidewater glacier

Armin Dachauer, Andrea Kneib-Walter, Dominik Gräff, and Andreas Vieli

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Short summary
Terrestrial radar observations were used to investigate flow speed changes at Eqalorutsit Kangilliit Sermiat, a marine-terminating glacier in Greenland. The velocity varied on both daily and multi-day timescales, showing that the glacier speeds up markedly when meltwater or lake drainage increases basal water pressure. Usually speed changes move downstream with time towards the glacier front, but during multi-day speed-up events they start at the front and travel upstream.
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