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中文摘要: 该文对1991年5月24—25日华北回流天气过程作了分析。认为:(1)回流降水结构,在低层东北气流冷垫与中高层西南暖湿气流共同作用下,形成暖锋降水云系,有利于进行人工催化作业;(2)边界层出现冷空气活动,与降水增强有密切联系;(3)深厚的逆温层,同时也是东北风与西南风的过渡层。逆温层上下,风的垂直切变很大,以致整层的理查逊数Ri<1,是导致降水增强的一种机制。
中文关键词: 回流天气，降水，中尺度分析，高空暖锋，人工影响天气
Abstract:The precipitation within a return current process over Northern China in May 24—25 1991 is analysed. It is considered that:(1) The structure of the return current process precipition, NE cold flow at low level and SW warm and wet flow above, form the warm front precipitation cloud system in favour of the weather modification cloud seeding; (2) The precipitation enhancement is closely related with the cold air action in the boundary layer; (3) The deep inversion layer is actually the transitional level of NE and SW wind. The vertical wind shear above and below the inversion layer is very strong. So that the Richardson number is less than 1.0 within all the layers,and it is a mechanism of precipitation enhancement.
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引用文本：
游景炎,钱春生,1993.一次回流降水过程的中尺度分析[J].气象,19(12):19-22.
,1993.A Meso-Scale Analysis of Precipitation Within a Return Current Process[J].Meteor Mon,19(12):19-22.
游景炎,钱春生,1993.一次回流降水过程的中尺度分析[J].气象,19(12):19-22.
,1993.A Meso-Scale Analysis of Precipitation Within a Return Current Process[J].Meteor Mon,19(12):19-22.