海温异常影响江淮流域入梅的数值模拟  

NUMERICAL SIMULATION OF THE EFFECT OF SSTA ON THE MEIYU ONSET DATES IN YANGTSE-HUAIHE RIVER VALLEYS

作　　者：王钟睿[1] 钱永甫[1] 

机构地区：[1]南京大学大气科学系,江苏南京210093

出　　处：《热带气象学报》2005年第4期337-350,共14页Journal of Tropical Meteorology

基　　金：国家自然科学基金重点项目(40233037);国家自然科学基金面上项目(40175021);武汉理工大学博士科研启动基金(471-38300357)资助

摘　　要：利用CCM3模式模拟了海温异常对江淮流域入梅的影响。结果表明,西风带的槽脊活动对西太平洋副高的北跳有较大影响,孟加拉湾、菲律宾、四川北部、江淮流域及其北部的潜热释放对副高也有较大影响。当马斯克林高压附近的区域为负海温异常时,江淮流域入梅偏早,正海温异常时入梅偏晚。当南大西洋区域的海温为正或负异常时,江淮流域的入梅均偏早。台湾以东区域的海温为正或负异常时,江淮流域的入梅均偏晚。这些结果表明,影响入梅早晚的主要因子可能是大气环流背景异常,而不是同期海温异常。The CCM3 model is used to simulate the effect of the SSTA on the MeiYu onset dates （MOD） in the Yangtse-Huaihe River Valleys. Results show that activities of trough and ridge of westerly belt affect the subtropical high over the western Pacific. The latent heat release of the Bay of Bengal, the Philippines, the north of Sichuan Province, and Yangtse-Huaihe River Valley can affect the subtropical high in western Pacific. The MOD is early （late） when SSTA near Mascarene high is negative （positive）. The MOD is always early when SSTA of South Atlantic is positive or negative. The MOD is always late when SSTA east of Taiwan is positive or negative. The results show that the principal factors to affect the MOD may be general circulation anomaly rather than the simultaneous SSTA.

关 键 词：江淮梅雨 SSTA CCM3模式 数值模拟 

分 类 号：P426.62[天文地球—大气科学及气象学]