Articles | Volume 9, issue 1
The Cryosphere, 9, 151–178, 2015
https://doi.org/10.5194/tc-9-151-2015
The Cryosphere, 9, 151–178, 2015
https://doi.org/10.5194/tc-9-151-2015

Research article 28 Jan 2015

Research article | 28 Jan 2015

Observing Muostakh disappear: permafrost thaw subsidence and erosion of a ground-ice-rich island in response to arctic summer warming and sea ice reduction

F. Günther et al.

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Coastal erosion rates at Muostakh Island (eastern Siberian Arctic) have doubled, based on remotely sensed observations of land loss, and therefore the island will disappear prematurely. Based on analyses of seasonal variability of permafrost thaw, thermo-erosion increases by 1.2m per year when summer temperatures rise by 1°C. Due to rapid permafrost thaw, the land surface is subsiding up to 11cm per year, based on comparison of elevation changes and active layer thaw depth.