灾害天气研究进展  

Advances in Research on Severe Weather

出　　处：《中国气象科学研究院年报》2021年第1期4-63,共60页Annual Report of Cams

摘　　要：1灾害天气监测1.11 Ka/Ku双波段毫米波雷达功率谱数据反演液态水含量方法研究单波段雷达用Z-LWC关系反演液态水因不同降水类型反演的液态水含量相差较大。利用双波段雷达回波强度偏差反演液态水含量,直接将双波段雷达基数据回波强度相减的差值不仅包括了衰减的偏差也包括散射不同带来的偏差。1 Severe weather monitoring technology 1.1 A multiscale analysis of a nocturnal extreme rainfall event of 14 July 2017 in Northeast China A multiscale observational analysis of a nocturnal extreme rainfall event that occurred at Changtu in Northeast China on 14 July 2017 is performed using global analysis,automated surface observations,Doppler radar,rawinsonde,and disdrometer data.Results show that the large-scale environment was characterized by high convective available potential energy and precipitable water,moderate convective inhibition,and a southwesterly low-level jet(LLJ)capped by an inversion layer.The first and subsequent convective cells developed along a quasi-stationary surface convergence zone in a convection-void region of a previously dissipated meso-a-scale convective line.

关 键 词：回波强度 毫米波雷达 液态水含量 双波段 功率谱 波段雷达 灾害天气 降水类型 

分 类 号：TN9[电子电信—信息与通信工程]