Application of X-band Polarimetric Phased-array Radars in Quantitative Precipitation Estimation  

作　　者：张羽 刘显通 陈炳洪 冯嘉宝 曾琳 田聪聪 ZHANG Yu;LIU Xian-tong;CHEN Bing-hong;FENG Jia-bao;ZENG Lin;TIAN Cong-cong(Guangzhou Meteorological Observatory,Guangzhou 511430 China;Guangzhou Institute of Tropical Marine Meteorology,China Meteorological Administration,Guangzhou 510640 China)

机构地区：[1]Guangzhou Meteorological Observatory,Guangzhou 511430 China [2]Guangzhou Institute of Tropical Marine Meteorology,China Meteorological Administration,Guangzhou 510640 China

出　　处：《Journal of Tropical Meteorology》2023年第1期142-152,共11页热带气象学报（英文版）

基　　金：Guangzhou Science and Technology Plan Project(202103000030);Guangdong Meteorological Bureau Science and Technology Project(GRMC2020Z08);a project co-funded by the Development Team of Radar Application and Severe Convection Early Warning Technology(GRMCTD202002)。

摘　　要：The performance of different quantitative precipitation estimation(QPE) relationships is examined using the polarimetric variables from the X-band polarimetric phased-array radars in Guangzhou,China.Three QPE approaches,namely,R(ZH),R(ZH,ZDR) and R(KDP),are developed for horizontal reflectivity,differential reflectivity and specific phase shift rate,respectively.The estimation parameters are determined by fitting the relationships to the observed radar variables using the T-matrix method.The QPE relationships were examined using the data of four heavy precipitation events in southern China.The examination shows that the R(ZH) approach performs better for the precipitation rate less than 5 mm h-1, and R(KDP) is better for the rate higher than 5 mm h-1, while R(ZH,ZDR) has the worst performance.An adaptive approach is developed by taking the advantages of both R(ZH) and R(KDP) approaches to improve the QPE accuracy.

关 键 词：X-band polarimetric phased-array radar raindrop spectrum quantitative precipitation estimation 

分 类 号：P406[天文地球—大气科学及气象学]