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

Deser, C.; Sun, L. T.; Tomas, R. A.; Screen, J.

doi:10.1002/2016GL067792

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

2016

By Deser, C. ; Sun, L. T. ; Tomas, R. A. ; ...

Source: Geophysical Research Letters, 43(5), 2149-2157.

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Personal Author:

Deser, C. ; Sun, L. T. ; Tomas, R. A. ; Screen, J. ;

NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; ESRL (Earth System Research Laboratory) ; CIRES (Cooperative Institute for Research in Environmental Sciences) ;

Description:

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 degrees 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.

Source:

Geophysical Research Letters, 43(5), 2149-2157.

DOI:

https://doi.org/10.1002/2016GL067792

Document Type:

Journal Article ;

Rights Information:

CC BY

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

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