Based on population,climate,station distance,and altitude conditions,21 urban stations and 31 suburban stations were selected from 93 national automatic weather stations in Jiangxi Province.Using the relevant data,the spatiotemporal dis-tribution characteristics of urban heat island intensity in Jiangxi Province were discussed.The results indicated that:1)The central region of Jiangxi Province exhibited the strongest urban heat island intensity,while the northwestern and eastern parts of Jiangxi Province showed the characteristics of cool island.From 2014 to 2023,the average annual heat island intensity across the province was 0.26 ℃,and the strongest heat island intensity occurred in Nanchang,with an average intensity of 0.87 ℃.2)The annual urban heat island intensity in Jiangxi Province showed a positive trend,and varied with a range of-0.5 to 1.1 ℃ during 2014-2023.Ruijin presented the largest variation of annual heat island intensity,while Pingxiang exhibited the smallest variation.The top three cities with the highest increase in urban heat island intensity were Ruijin(0.09 ℃/a),Nan-chang(0.07 ℃/a),and Ji'an(0.06 ℃/a).The urban heat island intensity presented strong correlation with factors such as the growth rate of urbanization.3)The northern part of Jiangxi showed lower monthly urban heat island intensity in the first half of the year and higher levels in the second half of the year,with stronger variations in summer and autumn,and slightly weaker variations in winter and spring.The overall situation in central Jiangxi was relatively stable,with an increase in ampli-tude in the second half of the year and slightly stronger in autumn.Southern Jiangxi presented an inverted"U"-shaped distribu-tion,with stronger heat island effects in summer and less pronounced heat island effects in winter.4)The daily variation of ur-ban heat island intensity in Jiangxi Province showed a pattern of"dccrcasing-stablc-incrcasing-stablc",and gradually weakened from north to south,with the heat island effect disappeared in southern Jiangxi during the early morning.
关键词
城市热岛强度/自动气象站/平均气温/江西
Key words
urban heat island intensity/automatic weather station/average air temperature/Jiangxi Province
维普
万方数据