摘要
通过一个带地形处理的二维弹性对流云数值模式,模拟了斜坡地形上不同的环境风对地形对流云发展的影响.模拟结果表明,环境风场对于地形抬升产生的对流云的发展强度、云体结构以及地面降水等具有重大的影响.当中上层风与爬坡风的方向相反时,环境风切变和中上层风速越大,对流的强度越大;当中上层风和爬坡风方向一致时,环境风切变削弱对流云的最大强度.
The paper simulates the effects of ambient wind on the development of orographic-convective cloud by means of a two-dimensional compressible convective cloud modelwith terrain-following coordinate.The results indicate:Ambient wind has a great influ-ence on the developing intensity,structure and precipitation of orographic-convectivecloud over an upslope.When the middle-upper wind and lower upslope wind are in thereverse direction,the larger the wind speed and Shear intensity of middle-upper levelwind,the severer the convection;when in the identical direction,ambient wind willweaken the maximum intensity of convection.
出处
《应用气象学报》
CSCD
北大核心
1993年第4期394-401,共8页
Journal of Applied Meteorological Science
基金
大气科学开放实验室资助
地球流体力学数值模拟开放实验室资助
关键词
数值模拟
地形
对流云
环境风
Numerical simulation
Orographic-convective cloud
Ambient wind
