On the Mechanisms of Variability of the Atlantic Meridional Overturning Circulation (AMOC)

被引：6

作者：

Kuznetsova, D. A. ^{[1
]}

Bashmachnikov, I. L. ^{[1
,2
]}

机构：

[1] St Petersburg State Univ, St Petersburg, Russia

[2] Nansen Int Environm & Remote Sensing Ctr, St Petersburg, Russia

来源：

OCEANOLOGY | 2021年 / 61卷 / 06期

关键词：

Atlantic Meridional Overturning Circulation; North Atlantic; deep convection; upwelling in the Southern Ocean; SUBPOLAR NORTH-ATLANTIC; LABRADOR SEA; SEASONAL VARIABILITY; DEEP WATERS; OCEAN; CONVECTION; TRANSPORT; VOLUME; HEAT; ADVECTION;

D O I：

10.1134/S0001437021060072

中图分类号：

P7 [海洋学];

学科分类号：

0707 ;

摘要：

In this paper we investigate the relationship between the long-term variability of the Atlantic Meridional Overturning Circulation (AMOC) and the intensity of deep convection in the Greenland, Labrador, and Irminger seas, as well as with the intensity of wind induced upwelling in the Southern Ocean. This goal is achieved by extending the AMOC time series back to the 1950s using the AMOC ensemble index. The time variability of the intensity of deep convection over the 60-year study period is estimated using indices of deep convection, while upwelling in the Southern Ocean is estimated from the mean intensity of the divergence of Ekman transport. The contribution of each of the processes is assessed using cross-correlation and multiple regression analyses. The results suggest that during recent decades, the AMOC variations in the North Atlantic were mostly governed by the intensity of deep convection in the Irminger Sea and of upwelling in the Southern Ocean. Among these factors, the intensity of convection in the Irminger Sea has the largest impact on the observed variations in the AMOC.

引用

页码：803 / 814

页数：12

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