Analysis of Spatiotemporal Variation Characteristics of Short-duration Heavy Precipitation in Qinghai Province in the Past 20 Years
In this paper,using hourly precipitation observation data from 2003 to 2023 and minutely precipitation observation data from 2020 to 2023 of Qinghai Province,1425 cases of short-duration heavy precipitation were collected to analyze the spatiotemporal variation characteristics of short-duration heavy precipitation in Qinghai Province.The results showed that:(1)The occurrence of short-duration heavy precipitation in Qinghai Province has shown an overall increasing trend over the years,with a rapid increase since 2016 and the highest number of occurrences in 2022.(2)In terms of temporal variation characteristics,60.84％of the cases were mainly concentrated in August,and 88.6％occurred between 15:00 and 04:00 the next day,exhibiting a clear nocturnal precipitation characteristic.93.68％of the cases had hourly precipitation amounts concentrated between＞20 to 40 mm,and 96.1％of the cases lasted only for one hour,with minute precipitation amounts indicating a longer duration of light rainfall.(3)Spatially,Haidong,Xining,Hainan,and Huangnan were identified as high-incidence areas for short-duration heavy precipitation,mostly located in the eastern,southeastern regions,and areas with significant terrain variations.With the advancement of deep learning and large models,the integration of artificial intelligence with numerical weather prediction models is expected to further improve the monitoring and forecasting capabilities for short-duration heavy precipitation.
Short-duration heavy precipitationTime variation characteristicsSpatial distribution characteristics
万方数据
维普
