Comparison of Liquid Water Content Retrievals for Airborne Millimeter-Wave Radar with Different Particle Parameter Schemes  

作　　者：CUI Xin-dong YAO Zhi-gang ZHAO Zeng-liang WANG Min-wei FAN Chun-hui SU Tao 崔新东;姚志刚;赵增亮;王敏威;范春晖;苏涛(Beijing Institute of Applied Meteorology,Beijing 100029 China;State Key Laboratory of Geo-Information Engineering,Xi’an 710054 China;The Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029 China;Unit 94783,PLA,Huzhou,Zhejiang 313111 China;Institute of Meteorology and Oceanography,National University of Defense Technology,Nanjing 211101 China;Anhui Sun Create Electronics Corporation Ltd.,Hefei 230088 China)

机构地区：[1]Beijing Institute of Applied Meteorology,Beijing 100029 China [2]State Key Laboratory of Geo-Information Engineering,Xi’an 710054 China [3]The Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029 China [4]Unit 94783,PLA,Huzhou,Zhejiang 313111 China [5]Institute of Meteorology and Oceanography,National University of Defense Technology,Nanjing 211101 China [6]Anhui Sun Create Electronics Corporation Ltd.,Hefei 230088 China

出　　处：《Journal of Tropical Meteorology》2020年第2期188-198,共11页热带气象学报（英文版）

基　　金：National Natural Science Foundation of China(41575031,41175089);China Postdoctoral Science Foundation(2015M580124);Key Laboratory of Geo-Information Engineering(S18701)

摘　　要：In the application of the physical iterative method to retrieve millimeter-wave radar liquid water content(LWC)and liquid water path(LWP),particle parameter scheme is the main factor affecting retrieval performance.In this paper,synchronous measurements of an airborne millimeter-wave radar and a hot-wire probe in stratus cloud are used to compare the LWC retrievals of the oceanic and continental particle parameter scheme with diameter less than 50μm and the particle parameter scheme with diameter less than 500μm and 1500μm(scheme 1,scheme 2,scheme 3,and scheme4,respectively).The results show that the particle parameter scheme needs to be selected according to the reflectivity factor when using the physical iterative method to retrieve the LWC and LWP.When the reflectivity factor is less than-30 d BZ,the retrieval error of scheme 1 is the minimum.When the reflectivity factor is greater than-30 d BZ,the retrieval error of scheme 4 is the minimum.Based on the reflectance factor value,the LWP retrievals of scheme 4 are closer to the measurements,the average relative bias is 5.2%,and the minimum relative bias is 4.4%.Compared with other schemes,scheme 4 seems to be more useful for the LWC and LWP retrieval of stratus cloud in China.

关 键 词：millimeter-wave radar physical iterative method particle parameter scheme liquid water content liquid water path 

分 类 号：P412.25[天文地球—大气科学及气象学] P426