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Identifying the roles of the ocean and atmosphere in creating a rapid equatorial response to a Southern Ocean anomaly

Blaker, A.T.; Sinha, B.; Ivchenko, V.O.; Wells, N.C.; Zalesny, V.B.. 2006 Identifying the roles of the ocean and atmosphere in creating a rapid equatorial response to a Southern Ocean anomaly. Geophysical Research Letters, 33 (6). L06720-[4pp]. 10.1029/2005GL025474

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Abstract/Summary

Recent research has identified a rapid ocean response mechanism to salinity anomalies in the Southern Ocean using an idealised ocean model. Here we examine the relative importance of the ocean and atmosphere in creating an equatorial response to a Southern Ocean anomaly. Using a coupled climate model with realistic bottom topography and land relief, two rapid teleconnections are produced from a high latitude anomaly. An equatorial ocean response can be seen after 30 days. The mechanism producing this response is shown to rely on barotropic and baroclinic oceanic wave propagation. A second, atmospheric, response is seen in the Northern Hemisphere (NH) high latitudes, driven by atmospheric Rossby waves. The ocean quickly responds to the atmospheric signal above it, resulting in sea surface temperature anomalies at NH high latitudes.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1029/2005GL025474
ISSN: 0094-8276
Date made live: 12 May 2006 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/132855

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