强对流天气发生机制的一种研究

A STUDY OF GENESIS MECHANISM FOR SEVERE CONVECTIVE WEATHER EVENTS

本文利用非地转的 Eady 模式进一步讨论了使得强对流发展的对称不稳定理论,着重指出,即使在大里查逊数下,只要层结合适,仍有对称不稳定发展的可能性。并用一次暴雨发生的天气过程说明了强对流天气发展对于对称不稳定理论的依赖性。

In this paper we further discussed the symmetric instability theory,which can induce deve-lopment of severe convective weather,based on the ageostrophic Eady model.It highlights thateven though under conditions of a large Richardson number,there is a possibility of symmetric in-stability development as long as the atmospheric stratification being suitable for the vertical windshear.Morever,we also analysed a storm rainfall process occurred on 2 August,1987.It is docu-mented that development of strong convective weather is highly correlated with symmetric insta-bility theory.