摘要
该文分析了１９８８年５月初出现于苏皖东部地区的一次飑线．下部深厚的辐合层与上部强烈的辐散层迭置为其存在空间；低层低空急流轴与θｓｅ场高值轴几乎重合，使该空间不仅有丰富的能量贮存，而且有利于扰动动能释放；沿低空急流的重力波传播与高压后部回流冷空气前缘的重力波“相交处”，冲击力可能很大，飑线正在此处出现．
A squall line weather process on 2 May 1988 was analysed over the eastern AnhuiJiangsu provinces. The analysed result shows that there was a deep convergence layer on the low level, and severe divergence layer on the upper level; the axis of low jet stream on the low level was almost coincident with the axis of high value of the θx field. So that the space of the Squall line not only had abundant energy storage, but also was favourable to the release of disturbance kinetic energy. In the crossing site of the gravity wave along the low jet stream and that of forward sector of back flow, the impulsive force might be very strong,and a Squall line just appeared there.
出处
《应用气象学报》
CSCD
北大核心
1996年第3期330-335,共6页
Journal of Applied Meteorological Science
基金
国家自然科学基金
关键词
飑线
急流
重力波
形成机制
沿海地区
中国
Backflow behind high pattern
Squall line
Jet stream
Gravity wave.
