The Cryosphere
The Cryosphere
TC
Articles | Volume 17, issue 6
Articles | Volume 17, issue 6
https://doi.org/10.5194/tc-17-2455-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-17-2455-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 17, issue 6
Research article
 | 
22 Jun 2023
Research article |  | 22 Jun 2023

Hydraulic suppression of basal glacier melt in sill fjords

Johan Nilsson, Eef van Dongen, Martin Jakobsson, Matt O'Regan, and Christian Stranne

Data sets

High-resolution bathymetry from the Ryder 2019 expedition to Northwest Greenland. Dataset version 1 Brian Calder, Björn Eriksson, Kevin Jerram, Elizabeth Weidner, Felicity Holmes, Julia Muchowski, Abhay Prakash, Tamara Handl, Emelie Ståhl, Larry Mayer, and Martin Jakobsson https://doi.org/10.17043/oden-ryder-2019-bathymetry-1

Oceanographic LADCP data from the Ryder 2019 expedition Christian Stranne, Johan Nilsson, and Julia Muchowski https://doi.org/10.17043/oden-ryder-2019-ladcp-1

Oceanographic CTD data from the Ryder 2019 expedition Christian Stranne, Johan Nilsson, Julia Muchowski, and Julek Chawarski https://doi.org/10.17043/oden-ryder-2019-ctd-1

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Short summary
We investigate how topographical sills suppress basal glacier melt in Greenlandic fjords. The basal melt drives an exchange flow over the sill, but there is an upper flow limit set by the Atlantic Water features outside the fjord. If this limit is reached, the flow enters a new regime where the melt is suppressed and its sensitivity to the Atlantic Water temperature is reduced.
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