成渝城市群热环境效应与植被覆盖度关系研究

Study on the Relationship between Thermal Environment Effect and Vegetation Coverage in Chengyu Urban Agglomeration

研究成渝城市群热岛效应和植被覆盖度对城市发展规划和生态文明建设具有重要的指导意义。采用均值-标准差法对成渝城市群热场变化进行研究,利用热岛指数分析热岛的时空变化,并通过地表温度和植被覆盖度的变化趋势特征,进一步分析城市化进程中两者的关系。研究结果表明,近16年来成渝城市群热场发生变化,城市热岛效应明显增强;地表温度在春夏季和冬季变化趋势相反;城市范围地表温度升高(降低)比周围地区明显;城市发展下,成渝城市群地表温度与植被覆盖度存在明显的负相关关系。

The study of heat island effect and vegetation coverage in Chengyu urban agglomeration has important guiding significance for urban development planning and ecological civilization construction.The Mean-Standard deviation method is used to study the change of thermal field in Chengyu urban agglomeration.Analysis of temporal and spatial variation of heat island by heat island index.Through the change trend characteristics of land surface temperature and vegetation coverage further analyze the relationship between land surface temperature and vegetation coverage in urbanization.The results show that the thermal field of Chengyu urban agglomeration has changed in the past 16 years, and the urban heat island effect is significantly enhanced.The change trend of surface temperature in spring and summer is contrary to in winter. Surface temperature increase(decrease) in urban areas more markedly than that in surrounding areas.Under urban development, there is a significant negative correlation between surface temperature and vegetation coverage in Chengyu urban agglomeration.