The role of ocean-atmosphere coupling in the zonal-mean atmospheric response to Arctic Sea ice loss
The role of ocean-atmosphere coupling in the zonal-mean climate response to projected late twenty-first-century Arctic sea ice loss is investigated using Community Climate System Model version 4 (CCSM4) at 1° spatial resolution. Parallel experiments with different ocean model configurations (full-de...
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Language: | English |
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American Meteorological Society
2015
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Online Access: | http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-021-604 https://doi.org/10.1175/JCLI-D-14-00325.1 |
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ftncar:oai:drupal-site.org:articles_16565 2023-09-05T13:16:26+02:00 The role of ocean-atmosphere coupling in the zonal-mean atmospheric response to Arctic Sea ice loss Deser, Clara (author) Tomas, Robert (author) Sun, Lantao (author) 2015-03-15 application/pdf http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-021-604 https://doi.org/10.1175/JCLI-D-14-00325.1 en eng American Meteorological Society Journal of Climate http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-021-604 doi:10.1175/JCLI-D-14-00325.1 ark:/85065/d76m3813 Copyright 2015 American Meteorological Society (AMS). Permission to use figures, tables, and brief excerpts from this work in scientific and educational works is hereby granted provided that the source is acknowledged. Any use of material in this work that is determined to be "fair use" under Section 107 or that satisfies the conditions specified in Section 108 of the U.S. Copyright Law (17 USC, as revised by P.L. 94-553) does not require the Society's permission. Republication, systematic reproduction, posting in electronic form on servers, or other uses of this material, except as exempted by the above statements, requires written permission or license from the AMS. Additional details are provided in the AMS Copyright Policies, available from the AMS at 617-227-2425 or amspubs@ametsoc.org. Permission to place a copy of this work on this server has been provided by the AMS. The AMS does not guarantee that the copy provided here is an accurate copy of the published work. Text article 2015 ftncar https://doi.org/10.1175/JCLI-D-14-00325.1 2023-08-14T18:36:08Z The role of ocean-atmosphere coupling in the zonal-mean climate response to projected late twenty-first-century Arctic sea ice loss is investigated using Community Climate System Model version 4 (CCSM4) at 1° spatial resolution. Parallel experiments with different ocean model configurations (full-depth, slab, and no interactive ocean) allow the roles of dynamical and thermodynamic ocean feedbacks to be isolated. In the absence of ocean coupling, the atmospheric response to Arctic sea ice loss is confined to north of 30°N, consisting of a weakening and equatorward shift of the westerlies accompanied by lower tropospheric warming and enhanced precipitation at high latitudes. With ocean feedbacks, the response expands to cover the whole globe and exhibits a high degree of equatorial symmetry: the entire troposphere warms, the global hydrological cycle strengthens, and the intertropical convergence zones shift equatorward. Ocean dynamics are fundamental to producing this equatorially symmetric pattern of response to Arctic sea ice loss. Finally, the absence of a poleward shift of the wintertime Northern Hemisphere westerlies in CCSM4’s response to greenhouse gas radiative forcing is shown to result from the competing effects of Arctic sea ice loss and greenhouse warming on the meridional temperature gradient in middle latitudes. Article in Journal/Newspaper Arctic Sea ice OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Arctic Journal of Climate 28 6 2168 2186 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
The role of ocean-atmosphere coupling in the zonal-mean climate response to projected late twenty-first-century Arctic sea ice loss is investigated using Community Climate System Model version 4 (CCSM4) at 1° spatial resolution. Parallel experiments with different ocean model configurations (full-depth, slab, and no interactive ocean) allow the roles of dynamical and thermodynamic ocean feedbacks to be isolated. In the absence of ocean coupling, the atmospheric response to Arctic sea ice loss is confined to north of 30°N, consisting of a weakening and equatorward shift of the westerlies accompanied by lower tropospheric warming and enhanced precipitation at high latitudes. With ocean feedbacks, the response expands to cover the whole globe and exhibits a high degree of equatorial symmetry: the entire troposphere warms, the global hydrological cycle strengthens, and the intertropical convergence zones shift equatorward. Ocean dynamics are fundamental to producing this equatorially symmetric pattern of response to Arctic sea ice loss. Finally, the absence of a poleward shift of the wintertime Northern Hemisphere westerlies in CCSM4’s response to greenhouse gas radiative forcing is shown to result from the competing effects of Arctic sea ice loss and greenhouse warming on the meridional temperature gradient in middle latitudes. |
author2 |
Deser, Clara (author) Tomas, Robert (author) Sun, Lantao (author) |
format |
Article in Journal/Newspaper |
title |
The role of ocean-atmosphere coupling in the zonal-mean atmospheric response to Arctic Sea ice loss |
spellingShingle |
The role of ocean-atmosphere coupling in the zonal-mean atmospheric response to Arctic Sea ice loss |
title_short |
The role of ocean-atmosphere coupling in the zonal-mean atmospheric response to Arctic Sea ice loss |
title_full |
The role of ocean-atmosphere coupling in the zonal-mean atmospheric response to Arctic Sea ice loss |
title_fullStr |
The role of ocean-atmosphere coupling in the zonal-mean atmospheric response to Arctic Sea ice loss |
title_full_unstemmed |
The role of ocean-atmosphere coupling in the zonal-mean atmospheric response to Arctic Sea ice loss |
title_sort |
role of ocean-atmosphere coupling in the zonal-mean atmospheric response to arctic sea ice loss |
publisher |
American Meteorological Society |
publishDate |
2015 |
url |
http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-021-604 https://doi.org/10.1175/JCLI-D-14-00325.1 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_relation |
Journal of Climate http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-021-604 doi:10.1175/JCLI-D-14-00325.1 ark:/85065/d76m3813 |
op_rights |
Copyright 2015 American Meteorological Society (AMS). Permission to use figures, tables, and brief excerpts from this work in scientific and educational works is hereby granted provided that the source is acknowledged. Any use of material in this work that is determined to be "fair use" under Section 107 or that satisfies the conditions specified in Section 108 of the U.S. Copyright Law (17 USC, as revised by P.L. 94-553) does not require the Society's permission. Republication, systematic reproduction, posting in electronic form on servers, or other uses of this material, except as exempted by the above statements, requires written permission or license from the AMS. Additional details are provided in the AMS Copyright Policies, available from the AMS at 617-227-2425 or amspubs@ametsoc.org. Permission to place a copy of this work on this server has been provided by the AMS. The AMS does not guarantee that the copy provided here is an accurate copy of the published work. |
op_doi |
https://doi.org/10.1175/JCLI-D-14-00325.1 |
container_title |
Journal of Climate |
container_volume |
28 |
container_issue |
6 |
container_start_page |
2168 |
op_container_end_page |
2186 |
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1776198021588975616 |