Precipitation Microphysical Characteristics During the Hailstorm Event in Shunde on April 21,2023
XIAO Fan
LI Yao
HUANG Rongsheng
TAN Yinzi
WU Weizhong
Abstract：To investigate the microphysical processes of a hailstorm event in Shunde District,Foshan,on April 21,2023,observational data from a DSG5 laser disdrometer were processed to analyze the particle distribution characteristics during the hailstorm.Instantaneous rainfall intensity,radar reflectivity factor,and other microphysical parameters were calculated.The results indicate the following.The precipitation parti-cles during this hailstorm were primarily concentrated in the size range of 0.3-3.0 mm and the velocity range of 2-7 m/s.During the hailfall,the particle spectrum evolved from a unimodal to a bimodal structure,with a rapid increase in rainfall intensity.Both the particle size and velocity spectra exhibited significant broade-ning,along with an increase in particle number concentration.The entire particle spectrum shifted upward,and the disdrometer sampled precipitation particles larger than 7 mm.A sudden surge in radar reflectivity factor was observed during the hailfall,indicating that intense convective motions generated larger precipita-tion particles.The velocity-diameter distribution of this rainfall event mostly appeared above the empirical curve,likely due to the combined effects of hailstones and strong downdrafts.
Keywords：synopticshailprecipitationparticle spectrummicrophysicsFoshan City
Publication Date：2025-08-20
Online Publishing Date：2025-09-15(First online date of this platform, not the publication date of the document)
Pages：5( 18-22 )