Characteristics and Application of VIL Variation in Hailstorm Warning in Xining
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Abstract:
By analyzing the Vertically Integrated Liquid water content (VIL) characteristics for hailstorms in Xining from 2013 to 2016, the identification indexs of VIL in hailstorm warning and hailstorm path instruction are obtained. The results show that the hails in Xining mostly happened after 2 to 4 radar volume scans after maximum VIL, and within 4 to 5 volume scans after VIL increasing abruptly, and 864% of the hailing areas are within 45 to 210 km around the maximum VIL. The thresholds of VIL when hailing are 23 kg〖DK〗·m-2 in June, July and September, 28 kg〖DK〗·m-2 in August, while the abruptincrease values of VIL are 5 kg〖DK〗·m-2 in June and September and 10 kg〖DK〗·m-2 in July and August. The effectiveness test indicates that identification indexs of VIL have good indicativeness for hailstorm warning. The earlywarning of occurring time and hailing area can be conducted by the moving speed and direction extrapolation of VIL.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.