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dc.contributor.authorPolyakov, Igor V.
dc.contributor.authorRippeth, Tom
dc.contributor.authorFer, Ilker
dc.contributor.authorAlkire, Matthew B.
dc.contributor.authorCarmack, Eddy
dc.contributor.authorIngvaldsen, Randi Brunvær
dc.contributor.authorIvanov, Vladimir V.
dc.contributor.authorJanout, Markus
dc.contributor.authorLind, Sigrid
dc.contributor.authorPadman, Laurie
dc.contributor.authorPnyushkov, Andrey V.
dc.contributor.authorRember, Robert
dc.date.accessioned2020-10-14T15:46:47Z
dc.date.available2020-10-14T15:46:47Z
dc.date.issued2020-08-20
dc.description.abstractA 15-yr duration record of mooring observations from the eastern (>70°E) Eurasian Basin (EB) of the Arctic Ocean is used to show and quantify the recently increased oceanic heat flux from intermediate-depth (~150–900 m) warm Atlantic Water (AW) to the surface mixed layer and sea ice. The upward release of AW heat is regulated by the stability of the overlying halocline, which we show has weakened substantially in recent years. Shoaling of the AW has also contributed, with observations in winter 2017–18 showing AW at only 80 m depth, just below the wintertime surface mixed layer, the shallowest in our mooring records. The weakening of the halocline for several months at this time implies that AW heat was linked to winter convection associated with brine rejection during sea ice formation. This resulted in a substantial increase of upward oceanic heat flux during the winter season, from an average of 3–4 W m−2 in 2007–08 to >10 W m−2 in 2016–18. This seasonal AW heat loss in the eastern EB is equivalent to a more than a twofold reduction of winter ice growth. These changes imply a positive feedback as reduced sea ice cover permits increased mixing, augmenting the summer-dominated ice-albedo feedback.en_US
dc.identifier.citationPolyakov IV, Rippeth T, Fer I, Alkire MB, Carmack E, Ingvaldsen R, Ivanov VV, Janout M, Lind SL, Padman L, Pnyushkov A, Rember R. (2020). Weakening of Cold Halocline Layer Exposes Sea Ice to Oceanic Heat in the Eastern Arctic Ocean. <i>Journal of Climate, 33</i>(18).en_US
dc.identifier.cristinIDFRIDAID 1825538
dc.identifier.doihttps://doi.org/10.1175/JCLI-D-19-0976.1
dc.identifier.issn0894-8755
dc.identifier.issn1520-0442
dc.identifier.urihttps://hdl.handle.net/10037/19601
dc.language.isoengen_US
dc.publisherAmerican Meteorological Societyen_US
dc.relation.journalJournal of Climate
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/KLIMAFORSK/294396/Norway/Arctic Ocean mixing processes and vertical fluxes of energy and matter//en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holder© American Meteorological Society. Used with permission.en_US
dc.subjectVDP::Mathematics and natural science: 400en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400en_US
dc.titleWeakening of Cold Halocline Layer Exposes Sea Ice to Oceanic Heat in the Eastern Arctic Oceanen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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