海洋气象学报2025，Vol.45Issue(5)：111-123,13.DOI:10.19513/j.cnki.hyqxxb.20241119001
天津暖季不同历时降水过程的时空演变特征
Spatial and temporal variations of precipitation events with different durations during the warm season in Tianjin
摘要
Abstract
Different precipitation events are divided into short-duration,medium-duration,long-duration and persistent precipitation at 2-h intervals by minute precipitation data of 12 national meteorological stations in Tianjin during the warm season(from May to September)of 1979-2020.The spatial and temporal variation characteristics of precipitation,intensity and frequency of the precipitation events with different durations are analyzed.The results are shown below.(1)Temporally,the variations of precipitation,precipitation frequency and ratio are consistent,short-and medium-duration precipitation events show an increasing trend,and long-duration and persistent precipitation events show a decreasing trend.The precipitation intensity increases in each duration.(2)The time range of high precipitation and intensity of short-and medium-duration precipitation events has expanded from the traditional"late July-early August"to"mid-June-late August",while that of long-duration and persistent precipitation events has become more concentrated.(3)There are different spatial characteristics and trends in precipitation and intensity.The change in precipitation is mainly reflected in the increase of short-duration precipitation and the decrease of persistent precipitation,corresponding to the increase in precipitation intensity.This change is particularly significant in urban districts and their surrounding areas as well as in Binhai New area,which may be related to the changes in the urban thermal environment caused by urbanization.关键词
降水强度/降水过程/暖季Key words
precipitation intensity/precipitation event/warm season分类
大气科学引用本文复制引用
杨艳娟,杨劲,任建玲..天津暖季不同历时降水过程的时空演变特征[J].海洋气象学报,2025,45(5):111-123,13.基金项目
干旱气象科学研究基金项目(IAM202416) （IAM202416）
