29. WHY CLIMATE MODELERS SHOULD WORRY ABOUT ATMOSPHERIC AND OCEANIC WEATHER
29. WHY CLIMATE MODELERS SHOULD WORRY ABOUT ATMOSPHERIC AND OCEANIC WEATHER
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29. 为什么气候建模者应该担心大气和海洋天气
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
K. Kumar
中科院分区：
文献类型：
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作者：
B. Kirtman;G. Vecchi;K. Kumar
这里介绍的当地海气反馈诊断表明，在热带海洋和大气的许多地区，主要驱动海面温度的年际变化。该诊断适用于非耦合 AGCM 仿真和耦合仿真。结果支持这样的说法：非耦合 AGCM 模拟无法捕捉大气和海洋之间的协变性，特别是在印度太平洋温暖地区。这对于模型能够在多大程度上再现观测到的热带遥相关具有影响。此外，诊断结果表明，耦合模型通常无法捕获西太平洋观测到的当地海气反馈。基于简单的理论计算，作者认为：（i）该误差导致 ENSO 事件向西延伸太远；（ii）为了减少该误差，需要在耦合系统中添加海气界面处的附加随机强迫。第二点得到了 CGCM 实验的支持。
The local air-sea feedback diagnostic presented here shows that in many regions of the tropical ocean and the atmosphere primarily drives interannual sea surface temperature variability. This diagnostic is applied to both uncoupled AGCM simulations and coupled simulations. The results support the claim that uncoupled AGCM simulations fail to capture the co-variability between the atmosphere and ocean particularly in warm regions of the IndoPacific. This has implications in terms of how well the model is able to reproduce the observed tropical teleconnections. In addition, the diagnostic reveals that the coupled models typically fail to capture the observed local air-sea feedbacks in the western Pacific. Based on simple theoretical calculations the authors argue that: (i) this error leads to ENSO events that extend too far to the west and (ii) that to reduce this error addition stochastic forcing at the air-sea interface needs to be added to the coupled system. This second point is supported by CGCM experiments.