摘要
利用CFL-03型边界层风廓线雷达资料,对2016年11月2122日平顶山地区暴雪天气过程诊断分析,结果表明:风廓线雷达资料从时间、空间上能够更加准确、有效地对这次过程的天气系统及气团性质变化实现实时连续监测。对流层中、下层垂直速度大于1 m·s^-1(最大为2.4 m·s^-1)、C^2n大于-134 dB(最大为-110 dB),是降水发生发展阶段,整个大气层大气湍流活动和空气上下运动有较好地对应关系。中、下层信噪比,能够很好地揭示降水发生、发展、结束时雷达接收到经目标散射后的信号强弱:信噪比大于20 dB的范围和中心强度越大,降水越集中且强盛。对流层中层到下层谱宽由0.5 m·s^-1以上区,变为0.5 m·s^-1以下区,对应降水强盛时期,反之无降水。
The CFL-03 boundary layer wind-profiling radar data collected during the snowstorm weather process that happened in Pingdingshan region in 2123 November 2016 are analyzed diagnostically.The results show that the wind-profiling radar can more precisely and effectively monitor the weather system and the change of air mass property in this snowstorm process in temporal and spatial scales,achieving real-time continuous monitoring.The vertical velocity in the middle and lower troposphere is greater than 1 m·s^-1(up to 2.4 m·s^-1),and the C2n is greater than-134 dB(up to-110 dB),which is the stage of precipitation occurrence and development.The atmospheric turbulence activity in the whole atmosphere has a good correlation with the air movement up and down.The signal-to-noise ratio(SNR)in the middle and lower layers can well reveal the signal strength scattered by the target and received by the radar when precipitation occurs,develops and ends.When the range and central intensity of signal-to-noise ratio is greater than 20 dB,the precipitation is intense and concentrated.The spectrum width of the middle to lower troposphere changes from the area above 0.5 m·s^-1 to the area below 0.5 m·s^-1 corresponding to the period of severe precipitation,otherwise there is no precipitation.
作者
李新
顾佳佳
李戈
王向丹
刘登辉
Li Xin;Gu jiajia;Li Ge;Wang Xiangdan;Liu Denghui(Pingdingshan Meteorological Office,Pingdingshan 467001,China;Luohe Meteorological Office,Luohe 462300,China)
出处
《气象与环境科学》
2020年第2期93-99,共7页
Meteorological and Environmental Sciences
基金
河南省气象局预报员专项(KQ201741)。
关键词
暴雪
平顶山
风廓线雷达
应用分析
snowstorm
Pingdingshan
wind-profiling radar
application analysis
