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Spring Cold Bias of SST and Minimal Wind Mixing in the Equatorial Pacific Cold Tongue
  • 时间:0
  • 分类:P731.11[天文地球—海洋科学] X16[环境科学与工程—环境科学]
  • 作者机构:[1]State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of AtmosphericPhysics, Chinese Academy of Sciences, Beijing 100029, China
  • 相关基金:Acknowledgements. The study is jointly supported by the National Basic Research Program of China (Grant Nos. 2010CB950502, 2010CB951904, and 2010AA012303), LASG Free Exploration Fund, and the National Natural Science Foundation of China (Grant Nos. 40906012 and 40775054).
中文摘要:

作者在赤道的东方和平的寒冷在模仿的海表面温度(SST ) 调查在偏爱之间的关系在在表面由一个海洋的一般发行量模型(OGCM ) 和混合的最小的风(MWM ) 模仿了的北方的春天期间舔。模仿的 SST 的冷偏爱在北方的春天期间是最大的,在约 3 楤牳灥吗?

英文摘要:

The authors investigate the relationship between bias in simulated sea surface temperature (SST) in the equatorial eastern Pacific cold tongue during the boreal spring as simulated by an oceanic general circulation model (OGCM) and minimal wind mixing (MWM) at the surface. The cold bias of simulated SST is the greatest during the boreal spring, at approximately 3℃. A sensi- tivity experiment reducing MWM by one order of magnitude greatly alleviates cold biases, especially in March-April. The decrease in bias is primarily due to weakened vertical mixing, which preserves heat in the uppermost layer and results in warmer simulated SST. The reduction in vertical mixing also leads to a weak westward current in the upper layer, which further contributes to SST warming. These findings imply that there are large uncertainties about simple model parameters such as MWM at the oceanic surface.

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