摘要
利用2016—2022年4—10月朝阳地区153个自动气象站逐小时降水观测数据资料,对朝阳地区短时强降水的时空分布特征进行分析。结果表明:朝阳地区短时强降水时间分布特征明显,年变化整体呈现波动特征,各年均以20~<30 mm/h的强度发生次数最多;最早出现在5月上旬,最晚在10月下旬,主要集中在7月上旬、7月下旬和8月上旬;第一高发时段在15:00—19:00。朝阳地区短时强降水空间分布不均匀,整体分布呈现东西少、中间多的态势,高发区主要集中在朝阳地区中部,不同级别强度的短时强降水高发区有明显差异;短时强降水类型以个别短时强降水和局地短时强降水为主;6—8月短时强降水事件的空间分布具有明显的区域特征;大部分地区最大小时雨强(极值)在30~<50 mm/h。
Using hourly precipitation observation data from 153 automatic meteorological stations in Chaoyang area from April to October during 2016-2022,this paper analyzed the spatio-temporal distribution characteristics of short-term heavy precipitation in Chaoyang area.The results showed that the temporal distribution characteristics of short-term heavy precipitation in Chaoyang area were obvious,and the annual variation showed a fluctuating trend as a whole.The intensity of 20-<30 mm/h occurred the most frequently in each year;it appeared earliest in first ten-days of May and the latest in last ten-days of October,mainly concentrated in first ten-days and last ten-days of July,and first ten-days of August;the first high incidence period was from 15:00 to 19:00.The spatial distribution of short-term heavy precipitation in the Chaoyang area was uneven,showing an overall distribution pattern which was less in east and west and more in the middle.The high incidence areas were mainly concentrated in the central part of the Chaoyang area,and there were significant differences in short-term heavy precipitation with different levels of intensity in the high incidence areas.The main types of short-term heavy precipitation were individual and local short-term heavy precipitation.The spatial distribution of short-term heavy precipitation events from June to August had obvious regional characteristics.The maximum hourly precipitation intensity(extreme value)in most areas was between 30 and<50 mm/h.
作者
徐一丹
刘红
郭佰汇
张金柏
吴丹
谭修敏
XU Yidan;LIU Hong;GUO Baihui;ZHANG Jinbai;WU Dan;TAN Xiumin(Chaoyang Meteorological Bureau,Chaoyang Liaoning 122000)
出处
《现代农业科技》
2024年第9期143-147,151,共6页
Modern Agricultural Science and Technology
关键词
短时强降水
时空分布
辽宁朝阳
2016—2022年
short-term heavy precipitation
spatio-temporal distribution
Chaoyang Liaoning
2016-2022
