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安徽省近45年最高气温时空变化特征
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摘要
利用安徽省78个气象站1961~2005年逐日最高气温资料,分析了安徽省平均最高气温、高温日数和高温出现初终日的时空分布特征。结果表明:安徽省平均最高气温空间上呈南高北低、西高东低分布,时间上呈先下降再上升的趋势,且平均最高气温在1968年和1993年发生突变;高温日数空间上呈南高北低分布,其中低值中心出现在大别山区,时间上呈先下降再上升的趋势,高温日集中在4~10月份,其中7月份出现的次数最多(48.1%);高温初日与终日的分布均呈现出南高北低的趋势,高温持续的时间经历了长-短-长的过程,最低点出现在20世纪80年代。
        The variation characteristics of average maximum temperature,the number of high temperature days as well as first and last days of high temperature occurrence were analyzed according to maximum trmperature data from 78 weather stations in Anhui Province from 1961 to 2005.The results showed that the spatial distribution of average maximum temperature in southern areas was higher than that in northern areas,and that in western areas was higher than that in eastern areas.Time variation of average maximum temperature showed decreasing-increasing trend,and abrupt change in 1968 and 1993.The number of high temperature days in southern areas was higher than that in northern areas,and the center of the lowest value occurred in Dabie Mountain Areas.Time variation of high temperature days showed the similar distribution with average maximum temperature.High temperature days occurred from April to October,and most frequently in July(48.1%).Distribution of first and last high temperature occurrence day was high in southern areas and low in northern areas.High temperature duration underwent a long-short-long change,with the shortest in early 1980s.
引文
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