积云参数化方案对夏季东亚季风区海气系统位相关系模拟的影响  

Influences of cumulus parameterization scheme on the simulation of the air-sea system phase relation in East Asian summer monsoon region

作　　者：李荔珊[1,2] 胡轶佳[1] 钟中[1] 朱益民[1] 

机构地区：[1]解放军理工大学气象海洋学院 [2]61741部队

出　　处：《气象科学》2016年第3期329-339,共11页Journal of the Meteorological Sciences

基　　金：国家自然科学基金资助项目(41205075);江苏省自然科学基金资助项目(BK2012062)

摘　　要：本文利用区域海气耦合模式RegCM-POM,分别选取Grell积云参数化方案和Emanuel积云参数化方案对北半球夏季(5—10月)的东亚气候进行模拟,研究不同积云对流参数化方案(CPS)对东亚夏季季风区海气系统位相关系模拟的影响。结果表明:不同CPS模拟的陆地降水具有一定的不确定性,而海洋降水和海温的模拟受CPS选择的影响更大。其中,Emanuel方案对海洋降水和海温的分布形势模拟总体上要好于Grell方案,且可以更好的模拟中国近海各海区的海气系统位相关系,特别是大气对海温的负反馈过程。原因在于Emanuel方案模拟的对流降水与海温的位相关系更接近观测总降水与海温的位相关系;而Grell方案对南海和孟加拉湾的对流降水模拟偏少,对黑潮对流降水的模拟偏多,错误地模拟了这几个海区积云对流过程发挥的作用,故其模拟的海气系统位相关系不如Emanuel方案。By using the regional air-sea coupled model RegCM-POMis , Grell cumulus parameter- ization scheme and Emanuel cumulus parameterization scheme are selected to simulate the summer cli- mate of northern hemisphere （May- October） in East Asia, and the impacts of different Cumulus Con- vection Parameterization Scheme （CPSs） on the simulation of the atmosphere-ocean system phase relation in East Asian summer monsoon region were also studied. Results show that the simulated precipitation o- ver land by different CPSs reveals some uncertainties. The CPS has more influences on the simulated pre- cipitation over ocean and sea surface temperature（SST）. The Emanuel scheme is better in simulating the distribution of ocean precipitation and SST and in simulating the air-sea system phase relation over the marginal sea of China than the Grell scheme in general , especially the negative feedback of atmosphere to SST, which can be explained that the phase relation of convective precipitation and SST simulated by the Emanuel scheme is more consistent with that of total precipitation and SST in observation. However, the simulated convective precipitation by Grell scheme is less than that by the Emanuel scheme in South China Sea and the Bay of Bengal, and it is more than that by the Emanuel scheme in Kuroshio region. The role of cumulus convection process is not represented reasonably by the Grell scheme. Therefore, the simulated air-sea system phase relation of Grell scheme is inferior to that of the Emanuel scheme.

关 键 词：区域海气耦合模式 海气系统位相关系 积云参数化方案 

分 类 号：P461[天文地球—大气科学及气象学]