成都城市下垫面变化对地表热场的影响  

Effects of Underlying Surface Change on Variation of Urban Thermal Characteristics in Chengdu

作　　者：宋云帆 闵文彬[1] 彭骏[1] SONG Yunfan;MIN Wenbin;PENG Jun(Institute of Plateau Meteorology,CMA/Heavy Rain and Drought-Flood Disasters in Plateau and Basin Key Laboratory of Sichuan Province,Chengdu 610071,China)

机构地区：[1]中国气象局成都高原气象研究所/高原与盆地暴雨旱涝灾害四川省重点实验室,成都610071

出　　处：《西南大学学报（自然科学版）》2022年第7期197-206,共10页Journal of Southwest University(Natural Science Edition)

基　　金：国家自然科学基金项目(42071410);国家高分辨率对地观测重大专项(30-H30C01-9004-19/21)。

摘　　要：利用2001年和2018年MODIS夏季地表温度产品,结合地表覆盖类型及植被指数数据,对比分析了成都市夏季城市热岛和热场强度的昼夜时空分布特征及变化,并重点分析了成都地表热场与城市建筑用地面积、植被覆盖度的关系.结果表明:(1) 2001年到2018年,成都市夏季城市地表热场发生了显著的变化,中心城区、近郊及远郊区县热岛范围均明显扩大,由多中心热岛发展为主城区与邻近郊县连城一片;热岛效应昼夜变化明显.(2)成都市城市不透水面面积增加了763.33 km^(2),强热岛面积增加了610 km^(2);城市不透水面与城市热岛区域分布及面积变化密切相关.(3)成都市整体热场强度表现为西低东高的特征,热场强度高温区与植被覆盖度呈负相关关系,白天相关性明显优于夜晚.Using 2001 and 2018 MODIS summer land surface temperature, combined with landcover and Normalized difference value vegetation index(NDVI) data, the diurnal and spatial distribution characteristics and changes of urban heat island and heat field intensity in Chengdu in summer were comparatively analyzed, and the relationship between surface heat field and urban construction land area and vegetation coverage in Chengdu was intensively analyzed. The results showed that:(1) From 2001 to 2018, the urban surface heat field of Chengdu had a great change. The range of heat island in the central urban area, suburban and suburban counties was significantly expanded, and the main urban area was developed from a multi-center heat island to main urban area adjacent to the suburban counties. The diurnal change of heat island effect was significant.(2) The impervious surface area and strong heat island area increased by 763.33 km^(2) and 610 km^(2), respectively. The change of impervious surface area was closely related to the regional distribution and area change of the heat island.(3) The overall distribution of heat island in Chengdu was low in the west and high in the east. The relationship between heat field intensity and vegetation coverage was negatively correlated.

关 键 词：下垫面变化 城市热岛 热场强度 中分辨率成像光谱仪 植被覆盖度 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]