摘要
应用准地转Ｑ矢量理论，分析了一次连续暴雨过程，共计算了１３个时次的Ｑ矢量及其散度、涡度、地转锋生函数等诊断场，得出了一些有益的结果，发现造成秋末冬初连阴雨中暴雨的内在机制，是冷暖空气相向运动，作顺时针旋转，螺旋式抬升的结果。提出了在实际预报业务中，应用Ｑ矢量场作暴雨落区预报的着眼点。
Based on quasi-geostrophic Q-vector theory,a case of continuous heavy rain has been analyzed. Q-vector, vorticity and divergence of Q, geostrophic frontogenesis function have been computed in 13 times of the heavy rain case. Results show that the internal mechanics of the heavyrain is a contrary movement of warm and cold air mass with clockwise and spiral lift movement.Further more, the forecast method of heavy rain area with Q-vector field in operational forecast practice is indicated.
出处
《气象》
CSCD
北大核心
1995年第11期17-21,共5页
Meteorological Monthly
