一种东亚冬季风指数的环流意义及优化  

An Optimized East Asian Winter Monsoon Index and Its Circulation Significance

作　　者：刘晴晴[1] 王盘兴[1] 徐祥德[2] 李丽平[1] 

机构地区：[1]南京信息工程大学大气科学学院,江苏南京210044 [2]中国气象科学研究院,北京100081

出　　处：《大气科学学报》2010年第4期436-442,共7页Transactions of Atmospheric Sciences

基　　金：江苏省气象灾害重点实验室资助项目(KLME060211)

摘　　要：论证了东亚冬季风环流指数IG与冬季蒙古高压强度和南北位置存在显著的同时相关,故IG本质上也是蒙古高压指数。在此基础上,构造了与IG结构相同的环流指数,从中筛选出一批优化的东亚冬季风指数IM。IM保持了IG结构简单、环流意义清晰的优点,且其格点选择更为合理,与中国同期气温负相关联系更强。因为定义IM的格点与蒙古高压关系密切,故IM也可称为蒙古高压指数。This paper demonstrates that the East Asian winter monsoon circulation index（EAWMI） IG is a circulation characteristic parameter that is significantly correlated with the intensity and meridional position of Mongolian high.Therefore it can be regarded essentially as the circulation index of the high.In a similar way to define IG,a group of optimized EAWMIs,IM,are constructed and optimally selected,and in comparison with IG,IM possesses advantages of simple structure,clear circulation meaning,more appropriately chosen definition gridpoints,and a closer correlation with winter temperatures in China.Because definition gridpoints of IM have a closer relation with Mongolian high,it can be called Mongolian high index.

关 键 词：东亚冬季风指数 优化的东亚冬季风指数 蒙古高压指数 

分 类 号：P434[天文地球—大气科学及气象学]