小尺度对流的发展和环境间相互作用的一个近似分析

A PRELIMINARY ANALYSIS OF THE INTERACTION BETWEEN CONVECTION DEVELOPMENT AND AMBIENT ENVIRONMENT

摘要: 本文应用一个近似的模式,分析了大气中小尺度对流发展时和环境(平均运动)间的非线性相互作用.分析结果指出,对流除在不稳定和中性稳定层结条件下可以发展外,在稳定层结条件下也可以得到发展,并且扰动的振幅最后均趋于有限值.同时,由于扰动的发展,大气的平均状态也要发生改变,不论开始时大气的层结如何,最后均趋向于中性,而大气的平均风速最后一般都要减小.

Abstract: In this paper, by using an approximate model, the interaction between the ambient environment and the convection development are discussed. It is shown that under certain condition the convection my also develop in a stable stratified atmosphere, because the ambient wind field and stratification variate with the development,of convection.