A 3-DIMENSIONAL MODEL OF AIR-FLOW AND OROGRAPHIC RAINFALL ENHANCEMENT

被引：15
|
作者：
DORE, AJ
CHOULARTON, TW
机构：
[1] Department of Pure and Applied Physics, University of Manchester Institute of Science and Technology, Manchester
来源：
QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY | 1992年 / 118卷 / 508期
关键词：
D O I：
10.1002/qj.49711850802
中图分类号：
P4 [大气科学（气象学）];
学科分类号：
0706 ; 070601 ;
摘要：
A three-dimensional model of airflow over hills has been used in conjunction with a two-dimensional model of orographic rainfall enhancement. This development has allowed the accurate production of rainfall contour maps in areas of complex terrain. A comparison has been made, using a variety of atmospheric stability profiles, between the wind fields and rainfall distributions over a bell-shaped hill and those over a two dimensional ridge of similar height. The results show that, in conditions of either stably stratified air or with an inversion layer aloft, three-dimensional airflow effects can lead to much reduced rainfall over a bell-shaped hill. It is shown that in such situations the use of a two-dimensional approximation can introduce significant errors. An example is presented of the rainfall distribution in complex hill terrain over south Kintyre on the western coast of Scotland.
引用
收藏
页码：1041 / 1056
页数：16
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