摘要
选取一次飑线过程的3次TRMM卫星同步轨道观测数据,分析了飑线中闪电与雷达回波的关系,结果表明:81%的闪电发生在7 km高度雷达回波大于35 dBz的像素附近。闪电绝大部分发生在对流降水区,占总闪电数的94%。发生闪电的对流单体其7 km最大雷达反射率一般大于35 dBz,6 km与9 km最大雷达反射率因子之差在15 dBz以下,其数量占到总数的85.7%。对流单体雷达反射率中值廓线能够较好地表示单体闪电频数。
We chose three observed data by TRMM satellite in a squall line process, and analyzed the relationship between lightning and radar echo. The results showed that 81% of lightning was near the radar echo which was larger than 35 dBz in 7 km altitude. Most of lightning occurred in the convective precipitation area, which contributed 94%. Lightning flashes often occurred in the convective cells whose maximum radar reflectivity in 7 km altitude was larger than 35 dBz, and the lapse rate of maximum radar reflectivity between 6 km and 9 km altitude was lower than 15 dBz, which contributed 85.7%. The mid- value profile of the convective cell radar reflectivity has capability to reveal cell flash frequency.
出处
《气象与环境科学》
2012年第1期74-77,共4页
Meteorological and Environmental Sciences
基金
河南省气象局"河南省雷电监测业务服务平台建设"项目(Z201013)资助
