上海快速城市化不同阶段城市热场景观格局演变研究

本文以上海市为例对城市热环境的空间分布特点及不同城市化阶段的演变特征进行分析.研究表明:随着上海城市化的深入,热环境空间结构趋于复杂,不同的城市化发展阶段热环境格局呈现出截然不同的演变特征.结合景观格局指数与转移矩阵对热环境的演变规律进行分析得出:城市化高速发展阶段,主城区及近郊区内的低温斑块等级上升明显,热环境格局的聚合度显著下降,景观多样性指数明显上升.优化发展阶段,主城区内强热场面积下降,近郊或远郊地区强热场明显增加,总体热环境格局的聚合度及多样性指数变化趋势减弱.本次研究结果展现了城市化不同阶段中城市热环境格局的分布与演变特征,为科学制定应对城市热岛问题的措施提供科学的参考.

Study on Spatiotemporal Changes of Urban Thermal Landscape Pattern in Different Stages of Passive Urbanization of Shanghai

This paper take Shanghai as an example,with the characteristics of different urbanization development stages,to analysis the spatial distribution of urban thermal environment and the resolution features in different stages.It shows that:with the further development of urbanization in Shanghai,urban heat island landscape tended to complex.And the evolutionary characters in different urbanization stages were also different.The landscape pattern indices and the transfer matrix shows that:in the stage of rapid development of urbanization,the land surface temperature grade in main urban and suburban areas was rising significantly,and the AI of spatial thermal environment was decreased significantly,but SHDI was increased at the same time.In the optimization stage of urbanization,high grade of land surface temperature in main urban area was decreased,and in suburbs and outer suburbs was increased,and the change trends of AI and SHDI had been weakened.This study shows the spatiotemporal changes of urban thermal landscape pattern in different stages of urbanization,which provides information for policy-making and strategy to deal with the problem of heat island effect work.