Diapycnal Mixing in Transient Responses of the Atlantic Meridional Overturning Circulation in an Enhanced Freshwater Perturbation Experiment

被引：0

作者：

Helge DRANGE ^{[1
,2
]}

Odd Helge OTTER ^{[1
,2
]}

机构：

[1] Nansen-Zhu International Research Centre,Institute of Atmospheric Physics,Chinese Academy of Sciences

[2] Nansen Environmental and Remote Sensing Center/Bjerknes Centre for Climate Research

来源：

AtmosphericandOceanicScienceLetters | 2010年 / 3卷 / 04期

关键词：

diapycnal mixing; western tropical North Atlantic; freshwater experiment;

D O I：

暂无

中图分类号：

P731.2 [海洋动力学];

学科分类号：

0707 ;

摘要：

It has been reported recently that the simulated Atlantic meridional overturning circulation(AMOC) using the coupled Bergen climate model(BCM) showed initial intensity declines followed by gradual recoveries over a 150-year enhanced freshwater input experiment.Stratification-dependent oceanic diapycnal mixing has been hypothesized as a reason for the simulated recovery of the AMOC.This study investigated the role of diapycnal mixing in transient responses of simulated AMOCs.Our results showed that stratification-dependent diapycnal mixing can cause stronger upwelling of deep water in the tropical Atlantic than that produced under conditions of fixed diapycnal mixing.Moreover,simulated AMOCs were more sensitive to active stratification-dependent diapycnal mixing than fixed mixing.However,stratification-dependent diapycnal mixing cannot be conclusively singled out as the critical cause of the recoveries of simulated AMOCs under enhanced-freshwater inputs.

引用

页码：201 / 206

页数：6

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