Publication:
North Atlantic Climate Response to Lake Agassiz Drainage at Coarse and Ocean Eddy-Permitting Resolutions

dc.contributor.author Spence, Paul en_US
dc.contributor.author Saenko, O en_US
dc.contributor.author Sijp, Willem en_US
dc.contributor.author England, Matthew en_US
dc.date.accessioned 2021-11-25T12:30:00Z
dc.date.available 2021-11-25T12:30:00Z
dc.date.issued 2013 en_US
dc.description.abstract The North Atlantic climate response to the catastrophic drainage of proglacial Lake Agassiz into the Labrador Sea is analyzed with coarse and ocean eddy-permitting versions of a global coupled climate model. The North Atlantic climate response is qualitatively consistent in that a large-scale cooling is simulated regardless of the model resolution or region of freshwater discharge. However, the magnitude and duration of the North Atlantic climate response is found to be sensitive to model resolution and the location of freshwater forcing. In particular, the long-term entrainment of freshwater along the boundary at higher resolution and its gradual, partially eddy-driven escape into the interior leads to low-salinity anomalies persisting in the subpolar Atlantic for decades longer. As a result, the maximum decline of the Atlantic meridional overturning circulation (AMOC) and the ocean meridional heat transport (MHT) is amplified by about a factor of 2 at ocean eddy-permitting resolution, and the recovery is delayed relative to the coarse grid model. This, in turn, increases the long-term cooling in the high-resolution simulations. A decomposition of the MHT response reveals an increased role for transients and the horizontal mean component of MHT at higher resolution. With fixed wind stress curl, it is a stronger response of bottom pressure torque to the freshwater forcing at higher resolution that leads to a larger anomaly of the depth-integrated circulation. en_US
dc.identifier.issn 0894-8755 en_US
dc.identifier.uri http://hdl.handle.net/1959.4/53701
dc.language English
dc.language.iso EN en_US
dc.rights CC BY-NC-ND 3.0 en_US
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/3.0/au/ en_US
dc.source Legacy MARC en_US
dc.title North Atlantic Climate Response to Lake Agassiz Drainage at Coarse and Ocean Eddy-Permitting Resolutions en_US
dc.type Journal Article en
dcterms.accessRights open access
dspace.entity.type Publication en_US
unsw.accessRights.uri https://purl.org/coar/access_right/c_abf2
unsw.description.publisherStatement © Copyright (2013) 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 of the U.S. Copyright Act September 2010 Page 2 or that satisfies the conditions specified in Section 108 of the U.S. Copyright Act (17 USC §108, as revised by P.L. 94-553) does not require the AMS’s permission. Republication, systematic reproduction, posting in electronic form, such as on a web site or in a searchable database, or other uses of this material, except as exempted by the above statement, requires written permission or a license from the AMS. Additional details are provided in the AMS Copyright Policy, available on the AMS Web site located at (http://www.ametsoc.org/) or from the AMS at 617-227-2425 or copyrights@ametsoc.org. en_US
unsw.identifier.doiPublisher http://dx.doi.org/10.1175/JCLI-D-11-00683.1 en_US
unsw.relation.FunderRefNo CE110001028 en_US
unsw.relation.faculty Science
unsw.relation.fundingScheme ARCCSS en_US
unsw.relation.ispartofissue 8 en_US
unsw.relation.ispartofjournal Journal of Climate en_US
unsw.relation.ispartofpagefrompageto 2651-2667 en_US
unsw.relation.ispartofvolume 26 en_US
unsw.relation.originalPublicationAffiliation Spence, Paul, Climate Change Research Centre (CCRC), Faculty of Science, UNSW en_US
unsw.relation.originalPublicationAffiliation Saenko, O en_US
unsw.relation.originalPublicationAffiliation Sijp, Willem, Climate Change Research Centre (CCRC), Faculty of Science, UNSW en_US
unsw.relation.originalPublicationAffiliation England, Matthew, Climate Change Research Centre (CCRC), Faculty of Science, UNSW en_US
unsw.relation.school School of Biological, Earth & Environmental Sciences *
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