东北较高纬度地区夏季闪电与雷暴相关参数的关系研究

摘要

The relationship between lightning activities and summer thunderstorms in the summer time during 2009 ~ 2010 in Northeast China was investigated by utilizing VLF/LF multi‐station network lightning data ,Doppler radar echo data and NCEP/CPC Global IR cloud‐top temperature data .T he results show that most of the lightning occurred in regions w here the radar echo exceeded 40 dBz , and the maximum height of 30 dBz radar echo of lightning‐producing thunderstorms exceeded 6 km .During the evolution of thunderstorms ,the peak time of flash rate slightly lagged behind the peak time of the max height of 30 dBz radar echo .The flash rate tended to increase exponentially with the maximum height of 30 dBz radar echo .Lightning was observed to occur in regions with an IR cloud‐top temperature of 210~240 K ,and it seems that the IR cloud‐top temperature of lightning‐producing thunderstorms during the dissipation phase was warmer than that during other stages and that the height of cloud top was lower .%利用V L F／L F闪电定位系统数据，并结合多普勒雷达以及卫星云图资料，对2009～2010年较高纬度东北地区夏季的闪电与雷暴相关参数的关系进行了研究。结果表明：闪电多发生在雷达回波强度大于40 dBz的区域，雷暴发生闪电时其30 dBz雷达回波最大高度大于6 km ；在雷暴的演变过程中，闪电的峰值时间略滞后于30 dBz雷达回波最大高度的峰值；闪电频数和30 dBz雷达回波最大高度存在指数增长关系；闪电主要发生在云顶红外温度在210～240 K的区域，在消散阶段，雷暴云云顶高度降低、红外温度较高。