2015年长治市春播首场透雨过程分析

Analysis on the First Soaking Rain during the Spring Sow ing in Changzhi City in 2015

为了进一步对春播期间出现的首场关键性透雨做出准确预报,更好地服务于三农,从天气形势、影响系统、地面气压场特征及FY-2E卫星红外云图等方面对长治市2015年4月1—2日春播首场透雨天气过程进行了综合分析。结果表明,春播首场大范围透雨天气过程,是在500 h Pa西风槽、700 h Pa切变的影响下形成的;地面气压场始终处于倒槽前部与高压底后部偏东气流的控制;春播透雨主要是强云团的缓慢东移造成的。

In onter to aecuralelv fore- cast the first soaking rain during the spring sowing period and belier serve three rural, the first soaking rain during April 1 to 2, 2015 in Changzhi City was analyzed from the weather situation, the impact system, the characteristics of surface pressure fiehi and the FY-2E satellite cloud picture. ＂Fire resuhs showed that the first large-scale soaking rain took piace under the inflnenee of 500 hPa westerly trough and 700 hPa shear. The ground pressure field were located in the front of inverted trough and high pressure south and eontrolled by easterly flow. The spring-sowing soaking rain was mainly caused by tire slow eastward propagation of strong cloud clusters.