摘要
本文利用丽江机场2008年6月9日的雷达回波、卫星云图及MICAPS2.0资料,结合丽江机场特殊地型及天气特点对整个过程进行个例剖析。分析形势场、雷达回波及卫星云图等资料得出:500hpa高层的弱冷平流和低层700hpa辐合相配合以及丽江以南和川滇一带相对高湿区为此次强对流天气提供了有利动力条件和水汽条件,然而不利的水汽输送条件使得当日强对流天气持续时间较短。发展快而移动慢的小块云团、消散中的云块在有利的条件下再次聚合及正弧型指状回波的生成,造成此次强对流天气的发生。
In this paper, making use of materials of radar echo, satellite cloud picture and MICAPS 2.0 ensuring special plane of Olympic flame at Lijiang airport on the 9th June 2008, the whole weather process suited special terrain and weather characteristic of Lijiang airport was analyzed. Synoptic situation, forecast materials of physics, radar echo and satellite cloud picture were analyzed, found that the match of cold advection on 500hpa height level and convergence on 700hpa height level, and heavy convergence ascending of high and low level offered for favorable weather background and dynamical condition. Secondly, favorable vapor condition was offered for heavy convective weather with the exist of relative wetter in the area of Lifiang south and Sichuan and Yunnan province, but, the duration of hea^T convective weather was less, was made by had vapor transported condition. Occurrence of this heavy convective weather were made by converge again of the little cloud of quicker evolution early and moving slowly late, middle and low cloud dissipating with favorable weather condition, and the birth of positive arc finger echo.
出处
《科技信息》
2009年第27期I0035-I0036,I0367,共3页
Science & Technology Information
关键词
丽江机场
圣火专机
强对流天气
正弧型指状回波
Lijiang airport
Special plane of flame
Heavy convective weather
Positive arc finger echo
