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

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

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  • 国家科技期刊平台
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  • NSTL
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Tornadoes are incredibly powerful and destructive natural events,yet the microphysical characteristics of the par-ent storm and its effects on tornadogenesis remain unclear.This 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 2023.The 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 between 2.5-and 4.0-km altitude in the non-tornadic storms,was absent in the tornadic cases.The non-tornadic supercells also displayed substantially higher specific differential phase(KDP)below the melting level,likely aroused from en-hanced melting and cooling.These findings suggest fundamental microphysical contrasts between tornadic and non-tornadic supercells.Specifically,tornadic supercells have smaller droplets and may reduce melting in hook echoes.Moreover,greater separation between the ZDR arc and the KDP foot was observed during tornadogenesis.The vertical gradient of KDP related to the cooling pool strength of the hook echo,regulating rear-flank downdraft thermodynam-ics.Despite 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.

tornadopolarimetric radarsupercellhook echodrop size distribution

Chao YUAN、Yang BAI、Pengfei SUN、Hua BAI、Lu XIA

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China Meteorological Administration Tornado Key Laboratory,Foshan 528315

Institute of Atmospheric Environment,China Meteorological Administration,Shenyang 110166

Panjin National Climate Observatory,Panjin 124010

Yangzhou Meteorological Bureau of Jiangsu Province,Yangzhou 225100

Yichun Meteorological Bureau of Heilongjiang Province,Yichun 153000

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National Natural Science Foundation of ChinaJoint Research Project for Meteorological Capacity ImprovementChina Meteorological Administration Tornado Key Laboratory FundChina Meteorological Administration Youth Innovation Team FundChina Meteorological Administration Special Innovation and Development ProgramChina Meteorological Administration Special Innovation and Development Program

4230501323NLTSQ002TKL202307CMA2024QN05CXFZ2022J003CXFZ2022J059

2024

10.1007/s13351-024-3102-5

气象学报(英文版)
中国气象学会

气象学报(英文版)

CSTPCD
影响因子：0.57
ISSN：0894-0525
年,卷(期)：2024.38(2)
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