摘要
通过对1986年~2020年期间降雹序列统计分析表明,青海省杂多县冰雹日数、冰雹灾害次数随年份推移呈现振荡减少的趋势;一年中冰雹出现在4月~10月,其中6月~9月为冰雹高发期,冰雹灾害同时也主要出现在4月~10月,其中5月、6月和9月为冰雹灾害高发期。杂多县冰雹的日变化非常明显,降雹主要发生在13时~20时,主要集中在15时~19时。从1986年~2020年杂多县冰雹最长持续时间年际变化分布特征可以看出,降雹持续时间整体上随年份推移呈显著减小的趋势;1986年~2020年杂多县平均单次降雹持续时间为7.5 min,总体呈减小趋势。
Based on the statistical analysis of hail series from 1986 to 2020,the results show that the number of mixed hail days and the number of hail disasters tend to decrease with the passage of years.In a year,hail occurs from April to October,of which June to September is the high incidence period of hail,and hail disasters also mainly occur from April to October,of which May,June and September are the high incidence periods of hail disasters.The daily variation of hail in Zaduo County is very obvious.The hail mainly occurs at 13-20 o’clock and mainly concentrates at 15-19 o’clock.From the distribution characteristics of the annual variation of the longest duration of hail in Zaduo County from 1986 to 2020,it can be seen that the duration of hail decreases significantly with the passage of years as a whole.From 1986 to 2020,the average duration of single hail in Zaduo County was 7.5min,showing a decreasing trend.
作者
葛友荣
才让罗加
许显辉
徐天彪
Ge Yourong;Cairang Luojia;Xu Xianhui;Xu Tianbiao(Zaduo County Meteorological,Bureau 815300;Dari County Meteorological,Bureau 814299;Zhiduo County Meteorological,Bureau 815399)
出处
《青海科技》
2022年第3期154-157,173,共5页
Qinghai Science and Technology
