摘要
本文运用已建立的二维时变云模式［1］，就中低空风垂直切变对对流和云微物理过程的影响进行了模拟研究。为此设计了五种方案进行了对比试验。结果表明：中低空风切变较小时，容易爆发对流；中低空切变不超过某一值时，对流发展缓慢，但最终会爆发强对流；一旦中低空风切变超过某一值时，则对流发展不起来。另一方面，中低空风切变可加强各云微物理过程及地面降水量。
A cloud model of two-dimensional time- (lependent has been used to study the effectsof middle and low-level wind shear on convection in this paper. And five schemes are de-signed to use in the comparative test. The result indicates: when the middle and low -levelwind shear is small, it is easy to lead to convection. When the middle and low-level windshear doesn' texceed a certain value, the convection develops slowly, but at last the severeconvection is caused to outbreak. Otherwise the convection doesn' t develop. On the otherhand, the middle and low-level wind shear can strengthen cloud microphysical processes andsurface precipitation,
出处
《气象科学》
CSCD
北大核心
1996年第4期345-354,共10页
Journal of the Meteorological Sciences
基金
国家自然科学基金!49375246
关键词
云模式
风切变
云微物理过程
数值试验
cloud model
cloud microphysical processes
numerical test
middle and lowlevel wind shear
