摘要
本文通过对1982年7月24—29日一次高原北侧槽活动过程的Q矢量分析,发现低压槽在高原上南伸时,一般槽前500 h Pa上有Q矢量辐合带,(?)·Q_(500)<0;对应200h Pa上有Q矢量辐散中心或辐散区,(?)·Q_(200)>0;同时槽线南端伴有强冷锋锋生中心。说明上升运动的维持、加强和冷锋锋生作用是低压槽在高原上南伸的重要机制。
By using Q-vector analysis for a process of the trough activity over the north side of the Qinghai-Xizang Plateau in July 24-29, 1982, it is found the favorable results are: (1) there is a zone of Q-vector convergence ( ·Q500 <0) on 500 hPa and a center or a range of Q-vector divergence ( ·Q200 > 0) on 200 hPa in front of the trough when the trough spreads southward over Plateau. (2) there is a center of cold frontogenetical area in south of the trough. (3) the maintenance and intensification of ascending motion and cold frontogenesis are important factors for the trough spreading southward over the Qinghai-Xizang Plateau.
出处
《高原气象》
CSCD
北大核心
1993年第4期437-441,共5页
Plateau Meteorology
关键词
Q矢量
青藏高原
槽
Q-vector
Qinghai-Xizang Plateau
Trough.
