摘要
本文用１９７１－１９９１年６－７月逐日５００ｈＰａ高度资料，计算亚洲地区（４５－７５°Ｎ、５０─１６０°Ｅ）内３个区域的阻塞指数，讨论偶极子阻高与孤立子阻高的气候特征，提出亚洲偶极子阻高是江淮梅雨期主要的西风带环流型及偶极子阻高的异常活动对１９９１年江淮特大洪水的作用；同时初步探讨偶极子阻高的垂直经向环流结构特征对江淮梅雨加强的作用。
This paper discusses the climatic characteristics of the modon and soliton blocking high with the blocking index counted by daily geopotential height on 500 hpa from June to July in 1971-1991 in Asia.The results show that modon block is the main circulation of westerly belt in the Meiyu seasons and that anomalous activity of the modon effect on the catastrophic flood in the Yangtze-Huaihe area in 1991.In addition, the effects of the characteristics of the meridional circulation on precipitation in the Mei-yu seasion have been preliminarily studied.
出处
《大气科学》
CSCD
北大核心
1995年第6期713-721,共9页
Chinese Journal of Atmospheric Sciences
关键词
偶极子阻高
孤立子阻高
阻塞指数
梅雨
江淮流域
modon blocking high
soliton blocking high
blocking index
meridional circulation.
