Comparison of the stability of the atlantic thermohaline circulation in two coupled atmosphere-ocean general circulation models
Comparison of the stability of the atlantic thermohaline circulation in two coupled atmosphere-ocean general circulation models
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DOI：
10.1175/jcli4256.1
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发表时间：
2007-09
影响因子：
4.9
通讯作者：
J. Yin;R. Stouffer
中科院分区：
文献类型：
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作者：
J. Yin;R. Stouffer
在GFDL开发的两个耦合大气-海洋环流模式显示了在耦合模式相互比较项目/古气候模拟相互比较项目（CMIP/PMIP）协调的“水冲洗”实验中大西洋温盐环流（THC）的不同稳定性。与R30型号中THC的“关闭”状态稳定相反，CM2.1中THC的“关闭”状态不稳定。在其他气候模型中也发现了这种差异。在这里进行了全面的分析，以调查的原因，不同的行为THC。与前人的工作一致，发现THC的不同稳定性与模拟的逆温盐环流（RTHC）和大气反馈密切相关。THC停运后，RTHC发展良好，稳定在R30。它将淡水输送到亚热带北大西洋，阻止盐度恢复并稳定THC的关闭模式。流量调节器
Abstract Two coupled atmosphere–ocean general circulation models developed at GFDL show differing stability properties of the Atlantic thermohaline circulation (THC) in the Coupled Model Intercomparison Project/Paleoclimate Modeling Intercomparison Project (CMIP/PMIP) coordinated “water-hosing” experiment. In contrast to the R30 model in which the “off” state of the THC is stable, it is unstable in the CM2.1. This discrepancy has also been found among other climate models. Here a comprehensive analysis is performed to investigate the causes for the differing behaviors of the THC. In agreement with previous work, it is found that the different stability of the THC is closely related to the simulation of a reversed thermohaline circulation (RTHC) and the atmospheric feedback. After the shutdown of the THC, the RTHC is well developed and stable in R30. It transports freshwater into the subtropical North Atlantic, preventing the recovery of the salinity and stabilizing the off mode of the THC. The flux adjust...