气象与环境学报2024，Vol.40Issue(6)：53-61,9.DOI:10.3969/j.issn.1673-503X.2024.06.007
1961-2021年辽宁省区域性暴雨过程综合强度时空变化分析
Analysis of the spatiotemporal variation in the comprehensive intensity of regional heavy rainfall events in Liaoning province from 1961 to 2021
摘要
Abstract
This study uses daily precipitation data from 61 national meteorological stations in Liaoning province from 1961 to 2021.A range of methods,including the percentile method,standardization processing method,corre-lation coefficient method,and weighted comprehensive index method were employed.Five assessment indicators for regional heavy rainfall events in Liaoning province were selected:maximum event precipitation,maximum daily precipitation,maximum hourly precipitation,heavy rain coverage,and duration.A quantitative assessment model for regional heavy rainfall events was established to analyze the spatiotemporal variation characteristics of the com-prehensive intensity of regional heavy rainfall in Liaoning province.The results indicate that regional heavy rainfall events in Liaoning province occur from April to November,with a general duration of 1 to 4 days and a coverage of 4 to 30 stations.The frequency and comprehensive intensity of heavy rainfall are highest in summer,followed by autumn,and lowest in spring.Heavy precipitation levels above the heavy rain threshold are most frequent in the southeastern part of Liaoning,with strong precipitation more common in the southern part during spring,and in the southeastern part during summer and autumn.There is a significant interdecadal variation in the frequency and in-tensity of regional heavy rainfall events in Liaoning province.In the 1970s,heavy rainfall events were less fre-quent,whereas from the early 1980s to the present,they have been more frequent.The comprehensive intensity of regional heavy rain was stronger from the mid-1970s to the early 21st century,and has been weaker since the start of the 21st century.关键词
降水量/暴雨范围/暴雨频率/暴雨强度Key words
Precipitation/Heavy rain coverage/Heavy rain frequency/Heavy rain intensity assessment分类
天文与地球科学引用本文复制引用
李倩,林益同,周晓宇,房一禾..1961-2021年辽宁省区域性暴雨过程综合强度时空变化分析[J].气象与环境学报,2024,40(6):53-61,9.基金项目
辽宁省市场监督管理局2021年辽宁省地方标准制修订项目"区域性暴雨过程综合强度评估规范(2021339)"(辽市监发[2021]19)和辽宁省气象局科学技术研究课题(202106、BA202103)共同资助. （2021339）
