Changes in MOC and gyre-induced Atlantic Ocean heat transport

被引：22

作者：

Drijfhout, SS ^{[1
]}

Hazeleger, W ^{[1
]}

机构：

[1] Royal Netherlands Meteorol Inst, KNMI, NL-3730 AE De Bilt, Netherlands

来源：

GEOPHYSICAL RESEARCH LETTERS | 2006年 / 33卷 / 07期

关键词：

D O I：

10.1029/2006GL025807

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Anthropogenic change of the Atlantic meridional ocean heat transport (AOHT) is diagnosed from a large ensemble of climate simulations over the period 1940 2080, as well as its relation to changes in the Meridional Overturning Circulation (MOC) and the gyre circulation in the Atlantic. Internal variability in AOHT is closely associated with MOC variability. The anthropogenic change in AOHT, however, does not follow the forced decrease in the MOC. Thermohaline changes in the intermediate and deep water masses that are formed in the subpolar gyre cause the vertical temperature gradient near the western boundary to increase. As a result, the heat transport by the baroclinic gyre component largely compensates the decreased heat transport by the MOC.

引用

页数：4

共 32 条

[1]

Bjerknes J., 1964, ADV GEOPHYS, V10, P1, DOI [10.1016/S0065-2687(08)60005-9, DOI 10.1016/S0065-2687(08)60005-9]

[2]

Boville BA, 2001, J CLIMATE, V14, P164, DOI 10.1175/1520-0442(2001)014<0164:ITTNCF>2.0.CO

[3]

[4] HEAT-TRANSPORT BY CURRENTS ACROSS 25-DEGREES-N LATITUDE IN THE ATLANTIC-OCEAN [J].

BRYDEN, HL ;

HALL, MM .

SCIENCE, 1980, 207 (4433) :884-886

[5] Rapid freshening of the deep North Atlantic Ocean over the past four decades [J].

Dickson, B ;

Yashayaev, I ;

Meincke, J ;

Turrell, B ;

Dye, S ;

Holfort, J .

NATURE, 2002, 416 (6883) :832-837

[6] The influence of transient surface fluxes on North Atlantic overturning in a coupled GCM climate change experiment [J].

Dixon, KW ;

Delworth, TL ;

Spelman, MJ ;

Stouffer, RJ .

GEOPHYSICAL RESEARCH LETTERS, 1999, 26 (17) :2749-2752

[7] The dominant mechanisms of variability in Atlantic ocean heat transport in a coupled ocean-atmosphere GCM [J].

Dong, BW ;

Sutton, RT .

GEOPHYSICAL RESEARCH LETTERS, 2001, 28 (12) :2445-2448

[8]

Eden C, 2001, J CLIMATE, V14, P2266, DOI 10.1175/1520-0442(2001)014<2266:MOITDV>2.0.CO

[9]

[10]

Eden C, 2001, J CLIMATE, V14, P676, DOI 10.1175/1520-0442(2001)014<0676:NAIVOR>2.0.CO

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