Spatio-temporal Features of Climate Comfortability in Major Cities of China
The climate comfortability is one of the important factors for evaluating the habitability of regional or urban human settlement environment.To reveal the climate comfort characteristics and their spatio-temporal changes in major cities of China,we analyze the overall climate comfort level,the intra-annual variation of climate comfortability and the spatial difference of climate comfortability in summer and winter by using outdoor weather comfort index(OWCI)model and daily meteorological data in the 31 major cities during 1991-2020.In addition,the characteristics of urban summer heat and its changing trend is investigated.The results show that the annual average climate comfortability in most of the cities from 1991 to 2020 is higher than the threshold of comfort level.The intra-annual accumulated days of comfort level in all the 31 major cities are 231 days on average,with more than half a year comfortable in all of the studied cities.This suggests the climate conditions are highly comfortable for human settlement in these cities of China.The intra-annual variation of climate comfortability in the 31 major cities can be classified into five types,namely,the severe winter and cool summer type,the cold winter and cool sum-mer type,the cold winter and hot summer type,the warm winter and prolonged hot summer type,and the comfortable in the whole year type.Generally,the weather is comfortable in spring and autumn,whereas large spatial difference of climate comfortability exists in winter and summer.The difference in winter is greater than that in summer.Among the 31 cities,there are 12 cities with a climate suitable for evading summer heat,while the climate of only five cities is suitable for evading winter chill,including Haikou,Guangzhou,Kunming,Nanning and Fuzhou.The scorching cities in summer are mainly located in the middle and lower reaches of the Yangtze River,and there has been an apparent upward trend in the num-ber of scorching days and degree of intense heat in summer during the past 30 years in these cities.
climate comfortabilityoutdoor weather comfort index(OWCI)livable citytourism and wellnessthe climate suitable for evading summer heat or winter chill
万方数据
维普
