成都市热岛效应特征分析  

Characteristics Analysis of Heat Island Effect in Chengdu

作　　者：黄旭龙 曾胜兰[1] 庞斯竞 唐思昶 颜照如 

机构地区：[1]成都信息工程大学大气科学学院,四川 成都

出　　处：《地球科学前沿（汉斯）》2024年第8期1099-1109,共11页Advances in Geosciences

摘　　要：为探讨成都市2007~2022近15年来热岛效应特征和时空演变规律,基于四年(2007、2012、2017、2022年)的MODIS遥感影像反演了成都市地表温度,结果表明:1) 成都市地表温度总体呈现上升趋势,呈现以中心城区为热中心,向城区周围扩散的分布特征,昼夜季节变化显著。年均地表温度低于10℃的地区基本位于西北地区,而日间年均地表温度28℃以上的地区主要位于中部地区;2) 从季节上看,热岛效应呈现夏强冬弱的特征,其中夏季城区和郊区平均温度差值可达6℃。春季、夏季夜间和秋季夜间热岛强度有增强趋势;3) 成都市城区内热岛状况有所改善,但周围受热岛效应影响范围扩大,热岛面积扩张;4) 成都市日间地表温度在城区的四周区域显著下降;西部山区地表温度变化与山地城市分布有关;成都东部以龙泉山脉为界温度变化多为带状分布。夜间地表温度变化多呈未显著变化。To investigate the characteristics and spatiotemporal evolution of the urban heat island effect in Chengdu over the past 15 years (2007~2022), MODIS remote sensing images from four years (2007, 2012, 2017, and 2022) were used to retrieve the land surface temperature of Chengdu. The results indicate that: 1) The land surface temperature in Chengdu has generally shown an upward trend, with a distribution pattern characterized by a heat center in the central urban area spreading towards the surrounding urban areas. There are significant diurnal and seasonal variations. Regions with an annual average land surface temperature below 10˚C are mainly located in the northwest, while areas with a daytime annual average land surface temperature above 28˚C are primarily located in the central region;2) Seasonally, the heat island effect is stronger in summer and weaker in winter, with the temperature difference between urban and suburban areas reaching up to 6˚C in summer. The intensity of the heat island effect at night during spring, summer, and

关 键 词：成都市热岛效应 热岛等级 时空演变 热岛强度 趋势分析 

分 类 号：X16[环境科学与工程—环境科学]