Using the daily 2-minute average wind speed data from 1961 to 2020 in Yichang City,the climate tendency method,Mann-Kendall test method and wavelet analysis method were used to analyze the change trend,mutation,and periodic characteristics of average wind speed at different time scales,revealing the long-term wind speed variation patterns in the local area of the Three Gorges area.The results showed that the annual mean wind speed in Yichang City had increased in recent 60 years with a decreasing rate of 0.084 m/(s·10 a),and the four sea-sons mean wind speed had a slightly increasing trend with a similar climate tendency rate.The increase of average wind speed was the fastest in August and the slowest in June.The Mann-Kendall mutation test showed that the annual mean wind speed in Yichang City had a sudden change in 1971,1996 and 2013.Wavelet analysis showed that the annual mean wind speed changes periodically,and the first main period of the annual mean wind speed change was 32 years.
关键词
风速/变化特征/气候倾向/Mann-Kendall检验/小波分析/宜昌市
Key words
Wind speed/Change characteristic/Climate tendency/Mann-Kendall test/Wavelet analysis/Yichang City
维普
万方数据