THE CHARACTERISTICS OF PRECIPITATION AND TEMPERATURE CHANGE CHARACTERISTICS OF THE MAIN PART OF YUNNAN HOT AREA FROM 1961 TO 2020
The inter-annual and inter-decadal variation characteristics of precipitation and temperature in the main parts of 67 hot areas in Yunnan Province from 1961 to 2020 are analyzed by methods such as linear regres-sion,anomaly analysis,M-K test,and inverse distance weighting interpolation.Conclusions:(1)Over the past 60 years,precipitation has decreased significantly,with a mutation from more to less in 2002.Precipitation is concentrated at the intersection of the Irrawaddy River,Lancang River,Nujiang River and the Southern part of the Red River,increasing from central Yunnan to Southern Yunnan.The precipitation rate decreases rapidly in central Yunnan,Northwestern Yunnan and Northeastern Yunnan,while it decreases slowly along the Nujiang Mountains,Wuliang Mountains and Ailao Mountains.(2)Temperature has increased significantly,withawar-ming mutation around 2000.The temperature is relatively high in the river valley areas and the Southern,Western and Eastern border areas,while it is relatively low in Northwestern Yunnan,Northeastern Yunnan and Central Yunnan.The temperature increase is faster in the areas South of the Nujiang River,Lancang River,Yuanjiang River and the Irrawaddy River basin,while it is slower around Dianchi Lake,Fuxian Lake,Erhai Lake and in Wenshan area.
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