摘要
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.
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.
基金
supported by Yongqi Gao's 100-Talent Program financed by the Chinese Academy of Sciences (CAS)
the CAS Project "IAP OGCM Improvement and Coupling to AGCM and Ocean Carbon Cycle" (KZCX2-YW-218)
the EU Project Dragoness (SSA5-CT-2006-030902)
关键词
亚极地环流
北大西洋
气候学
海洋气候
subpolar gyre index, North Atlantic merid-ional overturning circulation, indicator
