Microphysical Insights into a Tornadic Supercell from Dual-Polarization Radar Observations in Jiangsu, China on 14 May 2021

作     者：Chao YUAN Yang BAI Pengfei SUN Hua BAI Lu XIA Chao YUAN;Yang BAI;Pengfei SUN;Hua BAI;Lu XIA

作者机构：China Meteorological Administration Tornado Key LaboratoryFoshan 528315 Institute of Atmospheric EnvironmentChina Meteorological AdministrationShenyang 110166 Panjin National Climate ObservatoryPanjin 124010 Yangzhou Meteorological Bureau of Jiangsu ProvinceYangzhou 225100 Yichun Meteorological Bureau of Heilongjiang ProvinceYichun 153000 

出 版 物：《Journal of Meteorological Research》 (气象学报（英文版）)

年 卷 期：2024年第38卷第2期

页      面：303-320页

核心收录：

学科分类：07[理学] 070601[理学-气象学] 0706[理学-大气科学] 

基　　金：Supported by the National Natural Science Foundation of China(42305013) Joint Research Project for Meteorological Capacity Improvement(23NLTSQ002) China Meteorological Administration Tornado Key Laboratory Fund(TKL202307) China Meteorological Administration Youth Innovation Team Fund(CMA2024QN05) China Meteorological Administration Special Innovation and Development Program(CXFZ2022J003 and CXFZ2022J059) 

主　　题：tornado polarimetric radar supercell hook echo drop size distribution 

摘      要：Tornadoes are incredibly powerful and destructive natural events,yet the microphysical characteristics of the parent storm and its effects on tornadogenesis remain *** study analyzed polarization radar data of a tornadic supercell that occurred in Jiangsu Province of China on 14 May 2021,in comparison with another tornadic supercell and two non-tornadic supercells that occurred in the same region in *** two tornadic supercells exhibited lower differential reflectivity(ZDR)in the hook echo region compared with the non-tornadic supercells,indicating smaller median drop sizes.A distinct increase in ZDR from the melting of frozen hydrometeors,observed between2.5-and 4.0-km altitude in the non-tornadic storms,was absent in the tornadic *** non-tornadic supercells also displayed substantially higher specific differential phase(KDP)below the melting level,likely aroused from enhanced melting and *** findings suggest fundamental microphysical contrasts between tornadic and nontornadic ***,tornadic supercells have smaller droplets and may reduce melting in hook ***,greater separation between the ZDR arc and the KDP foot was observed during *** vertical gradient of KDP related to the cooling pool strength of the hook echo,regulating rear-flank downdraft *** the limited number of cases investigated,the findings of this study indicate that monitoring ZDR,KDP,and drop size distribution trends could assist with tornado prediction and warnings.