夏季印度季风环流系统与我国长江上游区域性持续暴雨的关系
THE RELATIONSHIP BETWEEN INDIAN MONSOON SYSTEMS IN SUMMER AND THE CONTINUOUS HEAVY-RAIN OVER UPPER REACHES OF THE CHANGJIANG
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摘要: 本文对夏季6-8月我国长江上游地区56次区域性持续暴雨过程进行了统计分析.指出它们与夏季印度季风环流系统之间存在着密切的联系.给出暴雨期间印度-孟加拉湾地区的温压场和有关气象要素分布的平均形势,计算了暴雨日雨量与其前24h气象要素的相关系数,从而说明长江上游暴雨与印度季风环流系统的相关关系,并指出主要的季风环流影响系统和关键区.Abstract: In this paper,the continuous heavy-rains over upper reaches of the Changjiang during June-August are analyzed.They are closely related with the Indian Monsoon Systems.The average synoptic situations and the average distributions of some meteorological elements over Bengal Bay during the period of heavy-rain are exhibited.The correlation coefficients between the meteorological elements and the rainfall,the main Monsoon influence systems and the key regions are denoted,which may be used as a reference for the forecasting of rainfall in 24 hours.
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