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| Analysis of dual polarization radar echo characteristics of three hail events on April 2,2024 |
| Huang Nan1, Ji Guiping2, Zhan Zixuan3, Peng Yongtai1, Chen Baofa2 |
1. Ji'an Meteorological Bureau,Ji'an 343000;
2. Jingdezhen Meteorological Bureau,Jingdezhen 333000;
3. Anfu County Meteorological Bureau,Ji'an 343200 |
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Abstract In order to improve the recognition ability of hail echoes,a detailed study was conducted on three hail processes on April 2,2024 T 00:00/April 3,2024 T 00:00 based on ground observation data from Jiangxi Province and dual polarization Doppler weather radar data from Nanchang and Ji'an.The results show that the severe convective weather this time was caused by the eastward movement of the 500 hPa shortwave trough,combined with the convergence and uplift of shear lines and the transport of warm and humid airflow,resulting in an unstable stratification of "dry and cold on top,warm and humid on bottom".The multi-system relay evolution of squall line activity has prolonged the duration of severe weather.Hail affected 38 townships (streets) in 9 cities and 36 counties in Jiangxi Province,with the maximum hail diameter reaching 3 cm.In hail processes in areas such as Luxi,Yichun and Yiyang,the dual polarization radar echo characteristics are significant,with strong combined reflectivity,large echo area,and severe convection.The high content of vertically integrated liquid water provides a material basis for the formation of hail.Abnormal parameters such as differential phase ratio,polarization difference,and differential reflectance indicate the presence of hail particle like water condensate particles.These features provide important reference for the identification and early warning of hail echoes.
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Received: 31 March 2025
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2025, Vol. 42 
