近10a黔西南州冰雹特征分析

ANALYSIS OF HAIL CHARACTERISTICS OF NEARLY 10 YEARS IN QIANXINAN PREFECTURE

利用黔西南州59个防雹炮点资料,对黔西南近10年(2006年至2015年)冰雹的变化特征、持续时间、降雹密度、直径等特征进行分析,得出如下结论:(1)近10年黔西南州炮点共出现冰雹380次,春季为冰雹发生的主要季节;大冰雹主要发生在4~5月。(2)冰雹出现时间主要在15时至21时,其中17时出现的次数最多;大冰雹出现的时间主要在15时至19时之间,其中19时出现的大冰雹次数最多。(3)兴义西北部、兴仁西南部至县城为冰雹多发区域。(4)冰雹的直径范围为0~50 mm,其中5~9 mm冰雹发生次数最多;大冰雹发生次数占总次数的9%。(5)冰雹密度在1~9粒/m2的最多,密度达100粒/m2以上次数少,仅占8%。(6)82%的冰雹持续时间不足5分钟。

Using 59 hail proof shot point data in Qianxinan Prefecture, the article analyzed the change of hail fea- ture, duration, hail density and diameter, the result was as followed： （1） There were 380 times hail nearly a decade, the spring was the main season occurring hail, large hailstones mainly occurred in April and May. （2） Hail appeared mainly in 15：00 to 21：00, the number of hail times occurred most at 17： 00. （3） The northwest of Xingyi and the southwest of Xingren were the areas occurring hail most. （4） The hail diameter was 0 ~ 50 mm, 5 -9 mm hail occurred most frequently; Large hailstones happened times accounted for 9% of total num- ber. （5） Hail density was 1 -9 grains per square, more than 100 grains per square was fewer, accounted for only 8%. （6） 82% of the hail duration were less than 5 minutes.