Does the recent freshening trend in the North Atlantic indicate a weakening thermohaline circulation?

被引：33

作者：

Wu, PL ^{[1
]}

Wood, R ^{[1
]}

Stott, P ^{[1
]}

机构：

[1] Hadley Ctr Climate Predict & Res, Met Off, Exeter EX1 3PB, Devon, England

来源：

GEOPHYSICAL RESEARCH LETTERS | 2004年 / 31卷 / 02期

关键词：

D O I：

10.1029/2003GL018584

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

It is widely expected that the thermohaline circulation of the ocean will slow down as greenhouse gas concentration in the atmosphere increases. This is partly due to an intensified hydrological cycle in a warmer climate. Is the recent observed freshening trend in the North Atlantic an indication of what has been expected? We report a similar freshening trend reproduced in an ensemble of four coupled model simulations with all major historical external (natural and anthropogenic) forcings. The modelled freshening trend originates from the Arctic Ocean where sea ice decrease and river runoffs increase with the same trend. Instead of weakening, we find an upward trend in the North Atlantic meridional overturning circulation.

引用

页码：L023011 / 4

页数：4

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