Articles | Volume 15, issue 6
The Cryosphere, 15, 2575–2591, 2021
https://doi.org/10.5194/tc-15-2575-2021
The Cryosphere, 15, 2575–2591, 2021
https://doi.org/10.5194/tc-15-2575-2021

Research article 15 Jun 2021

Research article | 15 Jun 2021

Interannual variability in Transpolar Drift summer sea ice thickness and potential impact of Atlantification

H. Jakob Belter et al.

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Short summary
Summer sea ice thickness observations based on electromagnetic induction measurements north of Fram Strait show a 20 % reduction in mean and modal ice thickness from 2001–2020. The observed variability is caused by changes in drift speeds and consequential variations in sea ice age and number of freezing-degree days. Increased ocean heat fluxes measured upstream in the source regions of Arctic ice seem to precondition ice thickness, which is potentially still measurable more than a year later.