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首页> 外文期刊>Journal of Physical Oceanography >Seasonal Variations Of The Seychelles Dome Simulated In The Cmip3 Models
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Seasonal Variations Of The Seychelles Dome Simulated In The Cmip3 Models

机译：在Cmip3模型中模拟的塞舌尔圆顶的季节性变化

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摘要

Using outputs from the "twentieth-century climate in coupled models" (20c3m) control run of the Coupled Model Intercomparison Project, phase 3 (CMIP3), coupled GCMs, the authors have examined how seasonal variations of the Seychelles Dome (SD) are simulated in the southwestern Indian Ocean. The observed SD shows a dominant semiannual signal due to the semiannual variation in the local Ekman upwelling resulting from a combination of two terms related to the wind stress curl and the zonal wind stress. However, all models fail to reproduce this important mechanism. In particular, the latter contribution-that determined by the seasonal variation of the zonal wind stress associated with the Indian monsoon-is not well simulated. Successful models need to reproduce the asymmetric nature of the monsoon: a shorter and stronger summer monsoon and a longer and weaker winter monsoon. Possible remedies for the model bias are also discussed.
机译：利用耦合模型互比较项目第3阶段（CMIP3）和耦合GCM的“耦合模型的20世纪气候”（20c3m）控制输出，作者研究了如何模拟塞舌尔圆顶（SD）的季节性变化在印度洋西南部。观测到的SD显示了主要的半年信号，这是由于局部Ekman上升流的半年变化，这是由与风应力卷曲和纬向风应力相关的两个项的组合产生的。但是，所有模型都无法重现此重要机制。特别是，后者的贡献（由与印度季风有关的纬向风应力的季节性变化确定）并未得到很好的模拟。成功的模型需要重现季风的非对称性质：夏季风较短且较强，而冬季风较长且较弱。还讨论了模型偏差的可能补救措施。

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