Articles | Volume 15, issue 6
The Cryosphere, 15, 2575–2591, 2021
The Cryosphere, 15, 2575–2591, 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.

Data sets

Electromagnetic induction raw data (EM Bird) of POLAR 6 during 2020 IceBird MOSAiC Summer campaign. H. J. Belter, T. Krumpen, and A. Herber

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.