The North Atlantic Ocean Is in a State of Reduced Overturning

被引：261

作者：

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

Josey, S. A. ^{[1
]}

Beaulieu, C. ^{[2
]}

Johns, W. E. ^{[3
]}

Moat, B. I. ^{[1
]}

Frajka-Williams, E. ^{[2
]}

Rayner, D. ^{[1
]}

Meinen, C. S. ^{[4
]}

Baringer, M. O. ^{[4
]}

Bryden, H. L. ^{[2
]}

McCarthy, G. D. ^{[1
,5
]}

机构：

[1] Natl Oceanog Ctr, Southampton, Hants, England

[2] Univ Southampton, Ocean & Earth Sci, Southampton, Hants, England

[3] Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, 4600 Rickenbacker Causeway, Miami, FL 33149 USA

[4] NOAA, Atlantic Oceanog & Meteorol Lab, Miami, FL 33149 USA

[5] Maynooth Univ, Dept Geog, ICARUS, Maynooth, Kildare, Ireland

来源：

GEOPHYSICAL RESEARCH LETTERS | 2018年 / 45卷 / 03期

基金：

英国自然环境研究理事会; 美国海洋和大气管理局; 美国国家科学基金会;

关键词：

Atlantic; AMOC; overturning; circulation; LABRADOR SEA-WATER; CIRCULATION; VARIABILITY; WIND; OSCILLATION; MECHANISMS;

D O I：

10.1002/2017GL076350

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The Atlantic Meridional Overturning Circulation (AMOC) is responsible for a variable and climatically important northward transport of heat. Using data from an array of instruments that span the Atlantic at 26 degrees N, we show that the AMOC has been in a state of reduced overturning since 2008 as compared to 2004-2008. This change of AMOC state is concurrent with other changes in the North Atlantic such as a northward shift and broadening of the Gulf Stream and altered patterns of heat content and sea surface temperature. These changes resemble the response to a declining AMOC predicted by coupled climate models. Concurrent changes in air-sea fluxes close to the western boundary reveal that the changes in ocean heat transport and sea surface temperature have altered the pattern of ocean-atmosphere heat exchange over the North Atlantic. These results provide strong observational evidence that the AMOC is a major factor in decadal-scale variability of North Atlantic climate.

引用

页码：1527 / 1533

页数：7

共 34 条

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