摘要
2007年7月26日傍晚在浙江省中部发生大冰雹天气,经分析认为,这是发生在副热带高压边缘的局地冰雹过程,移动不明显,影响范围小,但强度特强。降雹前回波VIL值突升,降雹时反而下降;有气旋式辐合流场;雹暴云中部近气旋流场且辐合中心向右前方倾斜,回波强度越强时,其倾斜度越大;下击暴流征状的出现时间较晚,持续时间较短。
The phenomenon of heavy hail occurred in the middle of Zhejiang province at dusk of 26 July 2007. The results showed that it was a local hail process that occurred at the borderline of subtropical high,and that it had the character of slight movement and narrow area of coverage, but with strong intensity. The echo VIL increased suddenly before the hail occurred but decreased when it was lasting. It had the cyclonic convergence. The middle part of hailstorms was near cyclone and its convergence center tilted ahead at the right side whose gradient became bigger and bigger as the echo intensity grew stronger and stronger. The downburst appeared lately and continued shortly.
出处
《气象科学》
CSCD
北大核心
2007年第B12期169-174,共6页
Journal of the Meteorological Sciences
关键词
副热带高压边缘
大冰雹
多普勒雷达
Subtropical high Heavy hail Doppler radar Echo character
