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A simple model of mélange buttressing for calving glaciers

Urheber*innen
/persons/resource/Tanja.Schlemm

Schlemm,  Tanja
Potsdam Institute for Climate Impact Research;

/persons/resource/Levermann

Levermann,  Anders
Potsdam Institute for Climate Impact Research;

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23881oa.pdf
(Verlagsversion), 5MB

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Zitation

Schlemm, T., Levermann, A. (2021): A simple model of mélange buttressing for calving glaciers. - The Cryosphere, 15, 2, 531-545.
https://doi.org/10.5194/tc-15-531-2021


Zitierlink: https://publications.pik-potsdam.de/pubman/item/item_23881
Zusammenfassung
Both ice sheets in Greenland and Antarctica are discharging ice into the ocean. In many regions along the coast of the ice sheets, the icebergs calve into a bay. If the addition of icebergs through calving is faster than their transport out of the embayment, the icebergs will be frozen into a mélange with surrounding sea ice in winter. In this case, the buttressing effect of the ice mélange can be considerably stronger than any buttressing by mere sea ice would be. This in turn stabilizes the glacier terminus and leads to a reduction in calving rates. Here we propose a simple parametrization of ice mélange buttressing which leads to an upper bound on calving rates and can be used in numerical and analytical modelling.