title: Greater role for Atlantic inflows on sea-ice loss in the Eurasian Basin of the Arctic Ocean.
abstract: Arctic sea-ice loss is a leading indicator of climate change and can be attributed, in large part, to atmospheric forcing. Here, we show that recent ice reductions, weakening of the halocline, and shoaling of the intermediate-depth Atlantic Water layer in the eastern Eurasian Basin have increased winter ventilation in the ocean interior, making this region structurally similar to that of the western Eurasian Basin. The associated enhanced release of oceanic heat has reduced winter sea-ice formation at a rate now comparable to losses from atmospheric thermodynamic forcing, thus explaining the recent reduction in sea-ice cover in the eastern Eurasian Basin. This encroaching "atlantification" of the Eurasian Basin represents an essential step toward a new Arctic climate state, with a substantially greater role for Atlantic inflows.
authors.affiliation: International Arctic Research Center and College of Natural Science and Mathematics, University of Alaska Fairbanks, 930 Koyukuk Drive, Fairbanks, AK 99775, USA. igor@iarc.uaf.edu.
authors.forename: Igor V
authors.identifier: 0000-0001-5912-8074
authors.initials: IV
authors.lastname: Polyakov
authors.affiliation: International Arctic Research Center, University of Alaska Fairbanks, 930 Koyukuk Drive, Fairbanks, AK 99775, USA.
authors.forename: Andrey V
authors.identifier: 0000-0001-9112-6458
authors.initials: AV
authors.lastname: Pnyushkov
authors.affiliation: Polar Science Center, Applied Physics Laboratory, University of Washington, 1013 Northeast 40th Street, Seattle, WA 98105, USA.
authors.forename: Matthew B
authors.identifier: 0000-0001-7324-3159
authors.initials: MB
authors.lastname: Alkire
authors.affiliation: Arctic and Antarctic Research Institute, 38 Bering Street, Saint Petersburg 199397, Russia.
authors.forename: Igor M
authors.identifier: 0000-0003-1863-9462
authors.initials: IM
authors.lastname: Ashik
authors.affiliation: International Arctic Research Center and College of Natural Science and Mathematics, University of Alaska Fairbanks, 930 Koyukuk Drive, Fairbanks, AK 99775, USA.
authors.forename: Till M
authors.identifier: 0000-0002-2887-205X
authors.initials: TM
authors.lastname: Baumann
authors.affiliation: Institute of Ocean Sciences, Fisheries and Oceans Canada, 9860 West Saanich Road, Sidney, BC, V8L 4B2, Canada.
authors.forename: Eddy C
authors.initials: EC
authors.lastname: Carmack
authors.affiliation: Institute of Oceanology, Polish Academy of Sciences, Powstancow Warszawy 55, 81-712 Sopot, Poland.
authors.forename: Ilona
authors.identifier: 0000-0002-5719-5860
authors.initials: I
authors.lastname: Goszczko
authors.affiliation: Polar Science Center, Applied Physics Laboratory, University of Washington, 1013 Northeast 40th Street, Seattle, WA 98105, USA.
authors.forename: John
authors.identifier: 0000-0003-2886-6925
authors.initials: J
authors.lastname: Guthrie
authors.affiliation: International Arctic Research Center, University of Alaska Fairbanks, 930 Koyukuk Drive, Fairbanks, AK, 99775, USA.|Hydrometeorological Center of Russia, 11-13, B, Predtechensky Pereulok, Moscow, 123242, Russia.|Arctic and Antarctic Research Institute, 38 Bering Street, Saint Petersburg 199397, Russia.
authors.forename: Vladimir V
authors.identifier: 0000-0003-2569-6027
authors.initials: VV
authors.lastname: Ivanov
authors.affiliation: Alfred-Wegener-Institute, Helmholtz Centre for Polar and Marine Research, Bussestraße 24, 27570 Bremerhaven, Germany.|Department of Physics and Electrical Engineering, Bremen University, Otto-Hahn Allee, 28334 Bremen, Germany.
authors.forename: Torsten
authors.identifier: 0000-0002-5786-3435
authors.initials: T
authors.lastname: Kanzow
authors.affiliation: Woods Hole Oceanographic Institution, 22 Water Street, Woods Hole, MA 02543, USA.
authors.forename: Richard
authors.identifier: 0000-0003-4117-9927
authors.initials: R
authors.lastname: Krishfield
authors.affiliation: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive Pasadena, CA 91109, USA.
authors.forename: Ronald
authors.identifier: 0000-0003-4051-5896
authors.initials: R
authors.lastname: Kwok
authors.affiliation: Norwegian Polar Institute, Fram Centre, N-9296 Tromsø, Norway.
authors.forename: Arild
authors.identifier: 0000-0002-6913-3368
authors.initials: A
authors.lastname: Sundfjord
authors.affiliation: Polar Science Center, Applied Physics Laboratory, University of Washington, 1013 Northeast 40th Street, Seattle, WA 98105, USA.
authors.forename: James
authors.identifier: 0000-0003-2848-6375
authors.initials: J
authors.lastname: Morison
authors.affiliation: International Arctic Research Center, University of Alaska Fairbanks, 930 Koyukuk Drive, Fairbanks, AK 99775, USA.
authors.forename: Robert
authors.identifier: 0000-0001-7747-5934
authors.initials: R
authors.lastname: Rember
authors.affiliation: Arctic and Antarctic Research Institute, 38 Bering Street, Saint Petersburg 199397, Russia.
authors.forename: Alexander
authors.identifier: 0000-0002-8267-5014
authors.initials: A
authors.lastname: Yulin