Climatic characteristics of hail days and ranges in Guangxi from 1971 to 2023
Based on the daily hail observation data from 88 national meteorological stations in Guangxi from 1971 to 2023,linear trend,low-pass filtering and wavelet analysis are used to analyze the variation characteristics of hail days and ranges in Guangxi.The hail process and hail comprehensive index are defined in Guangxi,and the duration and influence range of hail process are comprehensively evaluated.The results show that:(1)from 1971 to 2023,the annual number of hail days and the number of hail stations in Guangxi show a significant decreasing trend.The number of hail days and hail stations decrease in spring and winter,but increase in summer and autumn.(2)The annual number of hailstorm days and the number of hailstorm stations in Guangxi have obvious characteristics of periodic change,which first decrease and then increase in the 1970s,fluctuate from the 1980s to the 2000s,and then rebound after the 2010s.On the interdecadal scale,the number of hail days has a variation cycle of 12 to 16 years,and the number of hail stations has a variation cycle of 10 to 16 years and 16 to 20 years,respectively.(3)Six of the top ten hail processes in the hail comprehensive index in Guangxi occur in the 1970s to the 1980s,one in the 1990s,and the other three after the 2010s.
hail dayshail rangeclimatic characteristicshail comprehensive index
万方数据
