摘要
利用欧州中心格点场资料,对7例近海北上西折台风进行诊断分析.结果表明,当达到一定强度的台风西折时,在其移动路径左前侧常有暖平流增强;水汽通量辐合增大;不稳定层结加强;高空辐散和整层气旋性环流增加以及在这些物理变量中心增大区相迭加地区有整层降高中心,从而引起台风将向负变高中心移动.
AbstractA diagnostic analysis of abrupt turnig westward of typhoon tracks is performed by using the ECMWF grid data of seven cases. The results show that the intensification of thermal advection, moisture flux convergence, instability stratification, upper air divergence and integrated cyclonic circulation on the front left quadrant with respect to the direction of typhoon movement are the features for abrupt shift westward of typhoon tracks.
出处
《杭州大学学报（自然科学版）》
CSCD
1996年第3期285-289,共5页
Journal of Hangzhou University Natural Science Edition
关键词
天气分析
台风路径
物理量诊断
:typhoon track
synoptic analysis
physical diagnosis
