主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

Journal of Meteorology and Environment ›› 2020, Vol. 36 ›› Issue (3): 10-16.doi: 10.3969/j.issn.1673-503X.2020.03.002

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Identification of convection cells and the effect of hail suppression during a hail event

Zhao-wu LIU1(),Shi-qin TIAN1,Feng-jiao WANG1,Dian-li GONG2,*()   

  1. 1. Binzhou Meteorological Service, Binzhou 256612, China
    2. Shandong Weather Modification Office, Ji'nan 250031, China
  • Received:2019-05-14 Online:2020-06-30 Published:2020-07-09
  • Contact: Dian-li GONG E-mail:lzwbeifeng@126.com;sdgongdl@163.com

Abstract:

Based on conventional meteorological data during a hail event in the northwestern Shandong province from June 12 to 13, 2018, we analyzed the synoptic situation and physical quantity conditions for the hail formation.The results indicated that the radar echo index has an obviously decreasing trend before and after the operation of artificial hail suppression.The values of liquid water path (LWP) and echo top height index decrease by 49.9% and 37.4%, respectively.Hail probability drops from 99.3% to 28.7% after the hail suppression operation.The echo intensity, echo top height, and LWP values decrease by 10 dBz, 7 km, and 48 kg·m-2 at most, respectively.In a comparison of the development and evolution of two similar convection cells, the hail suppression operation makes echo intensity, echo top height, and LWP value of one convection cell decrease by 7 dBz, 3 km, and 11 kg·m-2, respectively, and then results in a large fluctuation in hail probability.The echo intensity and top height become higher and hail probability drops more quickly after the hail suppression.While the other convection cell without the effect of hail suppression has smaller fluctuation in radar echo indexes during the numbering period of convective cells, which further proves the positive effect of the artificial hail suppression.

Key words: Artificial hail suppression, Convection cell, Hail suppression effect

CLC Number: