The Relative Importance of Northern Overflow and Subpolar Deep Convection for the North Atlantic Thermohaline Circulation.

Döscher, Ralf and Redler, Rene (1997) The Relative Importance of Northern Overflow and Subpolar Deep Convection for the North Atlantic Thermohaline Circulation. Open Access Journal of Physical Oceanography, 27 . pp. 1894-1902. DOI 10.1175/1520-0485(1997)027<1894:TRIONO>2.0.CO;2.

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Abstract

The relative importance of the formation of different North Atlantic Deep Water masses on the meridional overturning is examined with a non-eddy-resolving version of the CME model. In contrast to a frequently held belief, convective deep-water formation south of the North Atlantic sill does not significantly force the large-scale overturning if an adequate overflow across the sill can be represented by the model. The sensitivity of the meridional transport to the surface thermohaline forcing is increased under alternate climatic conditions such as increased surface cooling or reduced overflow compared to the present-day situation. The results indicate that climate models may be too sensitive to decadal timescale variability of the surface forcing in subpolar regions.

Document Type: Article
Research affiliation: OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-TM Theory and Modeling
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1175/1520-0485(1997)027<1894:TRIONO>2.0.CO;2
ISSN: 0022-3670
Projects: SFB133
Date Deposited: 18 Feb 2008 17:24
Last Modified: 06 Apr 2018 08:42
URI: http://oceanrep.geomar.de/id/eprint/8077

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