Characterization and Application of S-Band Polarimetric Radar and X-Band Phased Array Radar for a Tornadic Storm Event on June 16,2022  

作　　者：陈炳洪 傅佩玲 张羽 苏冉 田聪聪 陈超 CHEN Bing-hong;FU Pei-ling;ZHANG Yu;SU Ran;TIAN Cong-cong;CHEN Chao(Guangzhou Meteorological Observatory,Guangzhou 511430 China;China Meteorological Administration Tornado Key Laboratory,Guangdong Meteorological Service,Foshan,Guangdong 528010 China;Collaborative Innovation Center for Smart Meteorology of Guangzhou,Guangzhou 511430 China;Guangdong Meteorological Observatory,Guangzhou 510640 China)

机构地区：[1]Guangzhou Meteorological Observatory,Guangzhou 511430 China [2]China Meteorological Administration Tornado Key Laboratory,Guangdong Meteorological Service,Foshan,Guangdong 528010 China [3]Collaborative Innovation Center for Smart Meteorology of Guangzhou,Guangzhou 511430 China [4]Guangdong Meteorological Observatory,Guangzhou 510640 China

出　　处：《Journal of Tropical Meteorology》2024年第2期189-199,共11页热带气象学报（英文版）

基　　金：National Key R&D Program of China (2022YFC3004101);Science and Technology Projects of Guangzhou (2023B04J0704,2023B04J0232);Natural Science Foundation of Guangdong Province (2022A15150118141);Key Scientific and Technological Research Project of Guangzhou Meteorological Society (Z202201)。

摘　　要：The X-band phased array radar offers faster scanning speed and higher spatial resolution compared to the S-band radar,making it capable of enhancing tornado monitoring and early warning capabilities.This study analyzed the characteristics and nowcasting signals of a tornado case that occurred on June 16,2022 in the Guangzhou region.Our findings indicate that the violent contraction of rotation radius and the dramatic increase in rotation speed were important signal characteristics associated with tornado formation.The X-band phased array radar,with its high temporal and spatial resolution,provided an opportunity to capture early warning signals from polarimetric characteristics.The X-band phased array radar demonstrated noteworthy ability to identify apparent tornado vortex signature(TVS)features in a 10-minute lead time,surpassing the capabilities of the CINRAD/SA radar.Additionally,due to its higher scanning frequency,the Xband phased-array radar was capable of consistently identifying TVS with shorter intervals,enabling a more precise tracking of the tornado's path.The application of professional radars,in this case,provides valuable insights for the monitoring of evolutions of severe local storms and even tornadoes and the issuance of early warning signals.

关 键 词：TORNADOES X-band phased array radar MESOCYCLONE rotation radius 

分 类 号：P406[天文地球—大气科学及气象学]