In this study, we explored spatial patterns and the temporal trends in high-temperature events （HTEs） for the mainland of China dudng 1961-2014 based on a dailymaximum surface-air-temperature dataset of 494 stations...In this study, we explored spatial patterns and the temporal trends in high-temperature events （HTEs） for the mainland of China dudng 1961-2014 based on a dailymaximum surface-air-temperature dataset of 494 stations and nonparametric trend detection methods. With three thresholds of 35℃ （HTE35）, 37℃ （HTE37）, and 40℃ （HTE40）, HTEs occurred in 82%, 71%, and 37% of the surveyed stations and showed an overall increasing trend in both frequency and intensity during 1961-2014. In northern and southeastem China, HTEs showed a significant increasing trend in both frequency and intensity, whilst a decreasing trend for both was observed in central China. Despite such regional heterogeneity, HTEs overwhelmingly presented three-phase characteristics in all three representative regions and throughout China; the phases are 1961-1980, 1980-1990, and 1990-2014. Both frequency and intensity of HTEs have strongly increased during 1990-2014 at 54.86%, 48.38%, and 23.28% of the investigated stations for HTE35, HTE37 and HTE40, respectively. These findings implied that HTEs adaptation should be paid further attention in the future over China because the wide spread distribution of HTEs and their increasing trends in both frequency and intensity during recent decades might pose challenges to the sustainability of human society and the ecosystem.展开更多
基金National Natural Science Foundation of China, No.41401603
文摘In this study, we explored spatial patterns and the temporal trends in high-temperature events （HTEs） for the mainland of China dudng 1961-2014 based on a dailymaximum surface-air-temperature dataset of 494 stations and nonparametric trend detection methods. With three thresholds of 35℃ （HTE35）, 37℃ （HTE37）, and 40℃ （HTE40）, HTEs occurred in 82%, 71%, and 37% of the surveyed stations and showed an overall increasing trend in both frequency and intensity during 1961-2014. In northern and southeastem China, HTEs showed a significant increasing trend in both frequency and intensity, whilst a decreasing trend for both was observed in central China. Despite such regional heterogeneity, HTEs overwhelmingly presented three-phase characteristics in all three representative regions and throughout China; the phases are 1961-1980, 1980-1990, and 1990-2014. Both frequency and intensity of HTEs have strongly increased during 1990-2014 at 54.86%, 48.38%, and 23.28% of the investigated stations for HTE35, HTE37 and HTE40, respectively. These findings implied that HTEs adaptation should be paid further attention in the future over China because the wide spread distribution of HTEs and their increasing trends in both frequency and intensity during recent decades might pose challenges to the sustainability of human society and the ecosystem.
