Does ocean coupling matter for the northern extratropical response to projected Arctic sea ice loss?

AMS Citation:
Deser, C., L. Sun, R. A. Tomas, and J. Screen, 2016: Does ocean coupling matter for the northern extratropical response to projected Arctic sea ice loss? Geophysical Research Letters, 43, 2149-2157, doi:10.1002/2016GL067792.
Date:2016-03-16
Resource Type:article
Title:Does ocean coupling matter for the northern extratropical response to projected Arctic sea ice loss?
Abstract: The question of whether ocean coupling matters for the extratropical Northern Hemisphere atmospheric response to projected late 21st century Arctic sea ice loss is addressed using a series of experiments with Community Climate System Model version 4 at 1° spatial resolution under different configurations of the ocean model component: no interactive ocean, thermodynamic slab ocean, and full-depth (dynamic plus thermodynamic) ocean. Ocean-atmosphere coupling magnifies the response to Arctic sea ice loss but does not change its overall structure; however, a slab ocean is inadequate for inferring the role of oceanic feedbacks. The westerly winds along the poleward flank of the eddy-driven jet weaken in response to Arctic sea ice loss, accompanied by a smaller-magnitude strengthening on the equatorward side, with largest amplitudes in winter. Dynamical and thermodynamic oceanic feedbacks amplify this response by approximately 50%. Air temperature, precipitation, and sea level pressure responses also show sensitivity to the degree of ocean coupling.
Peer Review:Refereed
Copyright Information:Copyright Author(s) 2016. This work is distributed under the Creative Commons Attribution 3.0 License
OpenSky citable URL: ark:/85065/d7pr7xkc
Publisher's Version: 10.1002/2016GL067792
Author(s):
  • Clara Deser - NCAR/UCAR
  • Lantao Sun
  • Robert Tomas - NCAR/UCAR
  • James Screen
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