Characteristics and Mechanism of Summer Rainfall in Shandong in 2021
Based on the NCEP reanalysis data and precipitation data from 122 meteorological stations,this study examines the rainfall anomalies and mechanisms during the summer of 2021 in Shandong province.The average summer rainfall in Shandong province in 2021 exceeds the normal by 25.3%,accompanied by an increased frequency of rainfall events.Another notable characteristic of summer rainfall in Shandong province is its uniform spatial distribution,with greater rainfall in the west and less rainfall in the east.Further analysis of the three most recent La Nina events reveals that the spatial distribution anomalies of summer rainfall in Shandong province during the La Nina decay period are attributed to the intensified subtropical high.The intensity of the subtropical high serves as a significant predictor during the La Nina decay period in Shandong province.
summer rainfall in ShandongLa Ninawestern pacific subtropical highpotential heightwind field