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Abstract Extreme temperature can reflect the trend of climate change. In depth analysis of the temporal and spatial characteristics of extreme temperature could predict the occurrence of various extreme weather events more accurately, and provide scientific reference for actively coping with extreme weather event. Based on the daily maximum and minimum temperature data of 36 stations in Guangdong province from 1961 to 2019, the spatio-temporal characteristics of extreme temperature in Guangdong province during the past 60 years were explored in this paper，by using RClimDex model, Mann-Kendall non-parametric test method and Pearson correlation analysis. Results showed that the inter-annual trend rates of the extreme temperature index in Guangdong province have been increasing in the past 60 years, and exhibited the most obvious increase in the past 10 years, meaning a significant warming trend of the extreme temperature in Guangdong province. The time of mutations in TXx and TNn occurred in the late 1990s and early 1980s, and the extreme low temperature indexes TNn and TNx were the first to show an upward trend. In terms of spatial distribution, the temperature of TXx increased with the distance to the coastline, while TXn and TNn showed the opposite variations. For TNx, the higher the latitude was, the lower the temperature was. The extreme temperature had the characteristics of sea and land zonality and latitude zonality. The variation trend of extreme temperature in different regions of Guangdong province was similar with that of the whole province, but the Pearl River Delta region exhibited a faster increasing trend. Extreme temperature indices were correlated with both natural and socio-economic factors, while latitude and population had greater impacts.
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Received: 10 January 2022
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2021, Vol. 34 
