Warming of the interior Arctic Ocean linked to sea ice losses at the basin margins

Science Advances
Mary-Louise TimmermansRichard Krishfield

Abstract

Arctic Ocean measurements reveal a near doubling of ocean heat content relative to the freezing temperature in the Beaufort Gyre halocline over the past three decades (1987-2017). This warming is linked to anomalous solar heating of surface waters in the northern Chukchi Sea, a main entryway for halocline waters to join the interior Beaufort Gyre. Summer solar heat absorption by the surface waters has increased fivefold over the same time period, chiefly because of reduced sea ice coverage. It is shown that the solar heating, considered together with subduction rates of surface water in this region, is sufficient to account for the observed halocline warming. Heat absorption at the basin margins and its subsequent accumulation in the ocean interior, therefore, have consequences for Beaufort Gyre sea ice beyond the summer season.

References

Sep 9, 2015·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·Andrey ProshutinskyJonathan L Bamber

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Citations

Oct 3, 2020·The Journal of the Acoustical Society of America·Megan S BallardMatthew A Dzieciuch
Feb 15, 2020·Journal of Geophysical Research. Oceans·A ProshutinskyJ Zhao
Jun 4, 2020·Ecology and Evolution·Nicole P BoucherEvan S Richardson
Dec 16, 2020·Proceedings of the National Academy of Sciences of the United States of America·Agata BuchwalJeffrey M Welker
Dec 8, 2020·Geophysical Research Letters·A BigdeliP Heimbach
Apr 25, 2021·Nature Communications·Jennifer A MacKinnonKevin R Wood

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Methods Mentioned

BETA
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Software Mentioned

Data
- Interpolating Variational Analysis ( DIVA )

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