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Arctic Sea Ice Decline in the 2010s: The Increasing Role of the Ocean—Air Heat Exchange in the Late Summer

1
Arctic and Antarctic Research Institute, 38 Beringa st., St. Petersburg 199397, Russia
2
Research Computing Center / Faculty of Geography, Lomonosov Moscow State University, 1 Leninskiye Gory, Moscow 119991, Russia
3
Hydrometeorological Research Center of Russian Federation, 11-13 Bolshoy Predtechensky per., Moscow 123242, Russia
4
A.M. Obukhov Institute of Atmospheric Physics of Russian Academy of Science, 3 Pyzhyovskiy Pereulok, Moscow 119017, Russia
5
Instigute of Geography of Russian Academy of Science, 29 Staromonetniy per., 119017 Moscow, Russia
6
Moscow Institute of Physics and Technology, 9 Institutskiy per., Dolgoprudny, 141701 Moscow Region, Russia
*
Author to whom correspondence should be addressed.
Atmosphere 2019, 10(4), 184; https://doi.org/10.3390/atmos10040184
Received: 20 January 2019 / Revised: 21 March 2019 / Accepted: 29 March 2019 / Published: 5 April 2019
(This article belongs to the Special Issue Atmospheric Processes Shaping Arctic Climate)
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Abstract

This study is focused on the specific features of ocean–air interaction in the Laptev Sea, in the late summer, on the basis of recurrent measurements during four expeditions in the 2000s and 2010s, atmospheric reanalysis products, and satellite ice concentration data. It was established that in the “icy” years, the accumulation of heat in the upper ocean layer is insignificant for the subsequent ice formation. In the “ice-free” years, the accumulated heat storage in the upper mixed layer depends on the duration of open water and the distance of the point of interest to the nearest ice edge. In a broader context, we considered possible links between the average ice area/extent in the August–September–October (ASO) period, and in the December–January–February (DJF) period, for two representative Arctic regions; that is, the Eurasian segment, defined within the bounds 60–120° E, 65–80° N, and the American segment, defined within the bounds 150° E–150° W, 65–80° N. Significant “seasonal memory”, characterized by the consistent change of the ice cover parameters in sequential seasons, was revealed in the Eurasian segment between 2007 and 2017. No linkage on a seasonal time scale was found in the American segment. A possible explanation for the distinguished contrast between the two geographical regions is proposed. View Full-Text
Keywords: Arctic Ocean; ocean–air interaction; sea ice; climate change; seasonal memory Arctic Ocean; ocean–air interaction; sea ice; climate change; seasonal memory
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Ivanov, V.; Varentsov, M.; Matveeva, T.; Repina, I.; Artamonov, A.; Khavina, E. Arctic Sea Ice Decline in the 2010s: The Increasing Role of the Ocean—Air Heat Exchange in the Late Summer. Atmosphere 2019, 10, 184.

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