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

Deser, Clara; Sun, Lantao; Tomas, Robert A.; Screen, James

doi:10.1002/2016GL067792

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i

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

2016
By Deser, Clara ; Sun, Lantao ; Tomas, Robert A. ; ...
Source: Geophysical Research Letters, 43(5), 2149-2157.

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Details:

Journal Title:

Geophysical Research Letters
Personal Author:

Deser, Clara ; Sun, Lantao ; Tomas, Robert A. ; Screen, James

Deser, Clara ; Sun, Lantao ; Tomas, Robert A. ; Screen, James Less -
NOAA Program & Office:

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

OAR (Oceanic and Atmospheric Research) ; ESRL (Earth System Research Laboratory) ; CIRES (Cooperative Institute for Research in Environmental Sciences) Less -
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
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CC BY
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Submitted
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urn:sha256:0eee8e09a3878029633fdc3e53b93e47bb29f60b5f8a11ddf462d8041b281dc9
Download URL:

https://repository.library.noaa.gov/view/noaa/14528/noaa_14528_DS1.pdf
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[PDF-5.79 MB]

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