山区谷地环流型的数值研究  

A Numerical Study of Circulation in Mountain Valley

作　　者：陈明[1] 傅抱璞[1] 

机构地区：[1]南京大学大气科学系,南京210008

出　　处：《环境科学研究》1996年第3期14-18,共5页Research of Environmental Sciences

基　　金：国家自然科学基金资助项目

摘　　要：建立了一个二维原始方程动力学模式,用于模拟山区谷地中几种典型的环流型式。模拟结果表明:谷中风场的分布强烈依赖于背景风压场分布型式及谷地本身的特征尺度。部分情况下谷地表现为明显的狭管通风效应;在另外一些情况下又极易形成背风坡转子流型,或者使谷中气流与自由大气反向,不同的谷地环流型式往往造成谷中污染物浓度分布的差异。数值实验给出的山区谷地中地形性环流系统及其成因,在污染气象学的理论和实践方面具有重要意义。A two-dimensionioal numerical model was set up to simulate circulation pattern in mountain valley. The results show that wind field in valley is dependent on the pattern of large-scale wind pressure field as well as the dimensions of valley itself. The valley ventilate effect and lee rotors were both simulated successfully. Different circulation patterns often cause different pollutant distribution. The simulated local circulation pattern is very meaningful in both theory and practice of air pollution meteorology.

关 键 词：谷地环流 背风转子 污染气象 环境气象学 

分 类 号：X16[环境科学与工程—环境科学]