春季江淮气旋发展的诊断研究

本文在等熵面上对１９９６年４月２８日－３０日发生在江淮地区的气旋作了分析和诊断研究。

THE DIAGNOSTIC RESEARCH OF DEVELOPING OF JIANG HUAI CYCLONE IN SPRING

In this paper, the diagnostic research is done about the cyclone in Jiang Huai area in1996, 4, 28 - 30In the process of developing of cyclone, the exlstence of center of large wind plays animportant role in development of cyclone. The analysis of barometric fie1d of isentroplc sur-face shows that the slope of isentropic surface leads to lifting up violently the warm andmoisture air, releasing of instable energy and enhancement of rainfall. The superposition ofthe cold transfer belt at the west of mid-layer and warm and moisture air at low layer is ableto enhance potential instability. The release of condensation latent heat of moisture is themain factor of deepening of cyclone at the surface. The formation of vertical vorticity pillar isrelated to the east movement of high potentia1 vorticity and superposition with high Potentialvorticity area at mid and low layer.