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The Cryosphere An interactive open-access journal of the European Geosciences Union
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Discussion papers
https://doi.org/10.5194/tc-2019-37
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-2019-37
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 06 May 2019

Research article | 06 May 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal The Cryosphere (TC).

The recent amplifying seasonal cycle of the Arctic sea ice extent related to the subsurface cooling in the Bering Sea

Xiao-Yi Yang1 and Guihua Wang2 Xiao-Yi Yang and Guihua Wang
  • 1State Key Laboratory of Marine Environmental Science, and College of Ocean and Earth Sciences, Xiamen University, Xiamen China
  • 2Department of Atmosphericand Oceanic Sciences & Institute of Atmospheric Sciences, Fudan University, Shanghai China

Abstract. After an unprecedented and accelerated retreat, the total Arctic sea ice cover in recent decade is characterized with low extent and large amplitude of annual cycle. This study investigated the spatial-temporal variation of the Arctic sea ice extent and the potential factors accounting for its amplifying seasonal cycle. The results show that the Chukchi-Bering sector of Arctic exhibits a contrasting decadal variation of sea ice extent between the different seasons: The sea ice in recent decade decreased in summer-autumn seasons but increased significantly in spring, leading an amplifying seasonal cycle. This decadal expansion of spring Chukchi-Bering sea ice may be attributed to the significant subsurface cooling in the northern Bering Sea.

Xiao-Yi Yang and Guihua Wang
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Status: open (until 01 Jul 2019)
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Xiao-Yi Yang and Guihua Wang
Xiao-Yi Yang and Guihua Wang
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Latest update: 22 May 2019
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Short summary
It seems an abrupt Arctic climate change signal appears from 2007. This study found the recent amplifying seasonal cycle of Arctic ice extent is attributed to the expansion of Bering Sea ice cover in spring. We asserted that subsurface cooling in recent decade is the major factor leading to spring ice expansion. Two possible dynamical processes are proposed. This study helps us to better understanding the recent Arctic climate regime shift and may shed light on the future of the Arctic climate.
It seems an abrupt Arctic climate change signal appears from 2007. This study found the recent...
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