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

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 correspondenc...

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Bibliographic Details
Published in:Atmospheric and Oceanic Science Letters
Main Authors: Gao, Yongqi, Yu, Lei
Format: Article in Journal/Newspaper
Language:English
Published: Institute of Atmospheric Physics, Chinese Academy of Sciences 2008
Subjects:
North Atlantic meridional overturning circulation
Subpolar gyre index
VDP::Matematikk og Naturvitenskap: 400
Labrador Sea
North Atlantic
Online Access:https://hdl.handle.net/1956/3302
https://doi.org/10.1080/16742834.2008.11446764
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Summary: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.

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