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Subpolar Gyre Index and the North Atlantic Meridional Overturning Circulation in a Coupled Climate Model

Gao, Yongqi; Yu, Lei
Journal article
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URI
https://hdl.handle.net/1956/3302
Date
2008-11-16
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  • Nansen Environmental and Remote Sensing Center (NERSC) [61]
Original version
Atmospheric and Oceanic Science Letters 2008;1(1):29-32   https://doi.org/10.1080/16742834.2008.11446764
Abstract
The subpolar gyre index (SPG), derived from the analysis of sea surface height (SSH), is proposed to be a potential indicator for the North Atlantic Meridional Overturning Circulation (AMOC) based on observation as well as the Ocean General Circulation Model (OGCM). We investigated the correspondence between the SPG and the AMOC in a coupled climate model. Our results confirm that the SPG can be used as an early indicator for the AMOC in the subtropical North Atlantic. Changes in the SPG are closely related to variations in the air-sea heat exchange in the Labrador Sea, and variations in deep water formation and southward dense water transport with the deep western boundary current (DWBC) in the North Atlantic.
Publisher
Institute of Atmospheric Physics, Chinese Academy of Sciences

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