中国1960-2019年体感温度的时空变化及其风险分析OA北大核心CSTPCD

Apparent temperature(AP)describes the actual temperature felt by the human body.Based on meteorological data such as temperature,relative humidity,and wind speed from 1960 to 2019 in China,the spatiotemporal variation patterns and high temperature risks of AP were estimated and analyzed in four typical climate zones(humid zone,transitional zone,arid zone,and Qinghai-Tibet Plateau).The results showed that:(1)In terms of spatial distribution,AP decreased from the southeast coastal area to the northwest inland area,and the average AP value gradually decreased from the humid area(about 17.0℃)to the arid area(about 7.0℃)and the Qinghai-Tibet Plateau area(about 0.6℃).(2)The national AP showed a significant upward trend,with the rates in four typical climate zones being 0.29℃/(10 a),0.27℃/(10 a),0.15℃/(10 a),and 0.13℃/(10 a),respectively.(3)The contribution rate of temperature changes to AP was the highest,about 92.4%,followed by wind speed and relative humidity,about 5.6%and 2.0%respectively.(4)70%to 80%of humid areas are defined as risk areas,and the number of days with high temperatures is increasing year by year.The 1.2%regional risk increase in the Qinghai Tibet Plateau is significant(0.22 d/a).Drought and transitional zones account for 30%to 40%of risk areas,and the risk gradually increases.The variation of high temperature risk days in typical climate zones showed spatial heterogeneity,with significant growth trends observed in most areas of humid regions and the Qinghai-Tibet Plateau.