一次高空槽在青藏高原上诱发切变线的Q矢量分析  

A Q-VECTOR ANALYSIS OF THE PROCESS OF SHEAR LINE ON QINGHAI-XIZANG PLATEAU TRIGGERED FROM MOVING TROUGH ALOFT

作　　者：郁淑华[1] 

机构地区：[1]成都高原气象研究所

出　　处：《应用气象学报》1994年第1期109-113,共5页Journal of Applied Meteorological Science

摘　　要：通过对１９８２年６月１－６日一次高空槽在青藏高原上诱发切变线的过程进行了Ｑ矢量分析，发现高原切变线产生、维持在明显的呈东西向的５００ｈＰａＱ矢量辐合带内，而且低层５００ｈＰａ·Ｑ＜０，高层２００ｈＰａ·Ｑ＞０。这说明宽广的上升运动的存在和加强，是产生、维持切变线的重要机制。高原切变线的产生、维持还与锋生情况有一定的关系。By using Q-vector analysis of the process of shear line formation over the Qinghai-Xizang Plateau on 1-6 June 1982,which is triggered from a moving trough aloft, it isfound that the favorable situations are:(1)the shear line on the Plateau is formed andmaintained in a convergent zone extending from east to west at the 500hPa Q-vector fieldwhere ·Q<0, and at 200hPa ·Q>0;(2)a wide area of ascent current is an im-portant role of formation and maintenance of the shear line;(3)the formation and exis-tance of shear line over the Plateau is connected with frontogenesis to a certain extent.

关 键 词：Q矢量 切变线 高空槽 锋生 

分 类 号：P441[天文地球—大气科学及气象学]