A multimodel comparison of centennial Atlantic meridional overturning circulation variability
A multimodel comparison of centennial Atlantic meridional overturning circulation variability
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DOI：
10.1007/s00382-011-1172-4
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发表时间：
2012-06
期刊：
影响因子：
4.6
通讯作者：
M. Menary;W. Park;K. Lohmann;M. Vellinga;M. Palmer;M. Latif;J. Jungclaus
中科院分区：
文献类型：
--
作者：
M. Menary;W. Park;K. Lohmann;M. Vellinga;M. Palmer;M. Latif;J. Jungclaus
通过对几个耦合环流模式（CGCMs）的千年控制模拟，验证了大西洋经向翻转环流（AMOC）的百年变率机制。这些模型是第三Hadley中心耦合气候模式（HadCM3）、Kiel气候模式（KCM）和Max Plank研究所地球系统模式（MPI-ESM）的扩展整合。这些模式模拟了大约100年时间尺度上显著的AMOC变化。百年机制将AMOC强度的变化与海洋盐度和表面温度以及热带辐合带（ITCZ）等大气现象联系起来。3个模型中的2个再现了机制的所有方面，第三个（MPI-ESM）再现了它们的大部分。与冰岛北部过去4000年的高分辨率古海表温度（SSTs）的比较，也与ITCZ有关，表明这种机制的元素在现实世界中也可能被探测到。
A mechanism contributing to centennial variability of the Atlantic Meridional Overturning Circulation (AMOC) is tested with multi-millennial control simulations of several coupled general circulation models (CGCMs). These are a substantially extended integration of the 3rd Hadley Centre Coupled Climate Model (HadCM3), the Kiel Climate Model (KCM), and the Max Plank Institute Earth System Model (MPI-ESM). Significant AMOC variability on time scales of around 100 years is simulated in these models. The centennial mechanism links changes in the strength of the AMOC with oceanic salinities and surface temperatures, and atmospheric phenomena such as the Intertropical Convergence Zone (ITCZ). 2 of the 3 models reproduce all aspects of the mechanism, with the third (MPI-ESM) reproducing most of them. A comparison with a high resolution paleo-proxy for Sea Surface Temperatures (SSTs) north of Iceland over the last 4,000 years, also linked to the ITCZ, suggests that elements of this mechanism may also be detectable in the real world.