CAJ | 학술논문

利用多普勒双偏振多参数气象雷达,结合地面LD-II闪电定位仪资料,对一次中尺度对流强风暴云的雷电过程进行观测分析.结果表明,闪电发生前后,对流云上部的差分传播相移率K_(DP)、差分反射率因子Z_(DR)和差相移Φ_(DP)有明显的变化,反映出云中冰相粒子排列取向随云中电场分布结构的变化而变化.这种闪电发生时冰相粒子排列取向存在明显变化的信息,说明用多参数气象雷达探测的技术以及开展雷电预警预报是可行的.
이용다보륵쌍편진다삼수기상뢰체,결합지면LD-II섬전정위의자료,대일차중척도대류강풍폭운적뇌전과정진행관측분석.결과표명,섬전발생전후,대류운상부적차분전파상이솔K_(DP)、차분반사솔인자Z_(DR)화차상이Φ_(DP)유명현적변화,반영출운중빙상입자배렬취향수운중전장분포결구적변화이변화.저충섬전발생시빙상입자배렬취향존재명현변화적신식,설명용다삼수기상뢰체탐측적기술이급개전뇌전예경예보시가행적.
Using an X-band Doppler dual-polarized meteorological radar,in conjunction with a networked ground LD-II lightning detector system,a lightning process in a mesoscale convective system in Jilin Province on 15th May 2007 was measured and analyzed.The results show that there were discernable changes in specific differential phase shift K_(DP),differential reflectivity factor Z_(DR) and differential phase shift Φ_(DP) in the top of the convective cloud before and after the occurrence of lightning,which indicates that the orientation of ice particles in the thunder cloud changed with changes in the distributive structure of the electric field within the cloud.This discernable direction information of ice particles in the thunder cloud around the lightning has proved the application possibility of the multi-parameter meteorological radar technology to the nowcasting and monitoring of lightning.