评估IPCC AMIP5模式对北半球冬季Hadley环流与热带海温经向结构关系的模拟  

Relationship of the boreal winter Hadley cell and various tropical SST meridional structures in IPCC AMIP5 models

作　　者：安然 冯娟 李建平 王雅琦[1] AN Ran;FENG Juan;LI Jianping;WANG Yaqi(College of Global Change and Earth System Science,Beijing Normal University,100875,Beijing,China;Laboratory for Regional Oceanography and Numerical Modeling Qingdao National Laboratory for Marine Science and Technology,266237,Qingdao,Shandong,China)

机构地区：[1]北京师范大学全球变化与地球系统科学研究院,北京100875 [2]中国海洋大学物理海洋教育部重点实验室,青岛海洋科学与技术国家实验室,山东青岛266100

出　　处：《北京师范大学学报（自然科学版）》2019年第4期532-544,共13页Journal of Beijing Normal University(Natural Science)

基　　金：国家自然科学基金资助项目(41705131,41530424)

摘　　要：利用ERA-Interim再分析资料,考察了IPCC AMIP5模式对Hadley环流及其与热带海温(SST)变化关系的模拟能力,通过将Hadley环流与热带SST的变化分解为关于赤道对称和关于赤道非对称2部分,分析了模式对于Hadley环流与热带SST不同分布的气候平均结构、主导模态及二者变化关系的模拟能力.结果显示,AMIP模式能够较好地模拟气候平均的Hadley环流的空间结构及其主导模态的空间结构,但是对强度的模拟较差.对Hadley环流与热带SST不同经向结构之间关系的模拟,大多数模式能较好地反映Hadley环流对热带SST不同经向结构的响应差异.结果表明,在全球平均的情况下,北半球冬季热带SST与Hadley环流之间的变化关系,以热带SST对大气环流的强迫为主.Using model data from Atmospheric Model Intercomparison Projection of IPCC,coordinated relationship between boreal winter[December-February(DJF)]Hadley circulation(HC)and tropical sea surface temperature(SST)have been evaluated.To evaluate performance of models in reproducing relationship between HC and different tropical SST meridional structures,variations in tropical SST and HC were decomposed into two components,the equatorially symmetric and equatorially asymmetric.AMIP models were found to perform well in simulating spatial structure of climatological structure of boreal winter HC,as well as distribution of dominant mode of boreal winter HC variability.However,simulation of intensity showed uncertainties.In simulation of relationship between HC and tropical SST,most models could better reflect response difference of HC to different tropical SST meridional structures Under global average condition,coordinated relationship between tropical SST and Hadley circulation during boreal winter was found to be dominated by forcing tropical SST onto atmospheric circulation.

关 键 词：AMIP模式 HADLEY环流 热带海温 经向结构 

分 类 号：P47[天文地球—大气科学及气象学]