山西中部城市群绿地景观格局对热环境的影响

On the influence of green landscape pattern on thermal environment in central urban agglomeration of Shanxi Province

【目的】为城市群土地利用总体规划、城市绿化工程建设提供参考。【方法】基于2010—2022年5个时期山西中部城市群Landsat系列影像数据,运用ArcGIS、ENVI等软件,通过单窗算法反演地表温度,运用景观格局指数和双变量空间自相关等研究方法,对绿地景观格局和热环境的相关性展开研究。【结果】结果表明:1)2010—2020年,山西省中部城市群热环境各级斑块数量和密度有不同幅度的增加,表示其破碎化程度和空间异质化程度增加,热环境状况得到改善;2)城市群绿地景观格局对热环境有着显著影响,城市群绿地景观面积越大、连通性越强,其降温效果越好;3)提取“太原-榆次城市核”典型区域进行研究,表明在9 km×9 km的网格下,城市群不同绿地景观格局指数对地表温度的缓解作用效果最佳,且在空间上相关性显著。【结论】探明了城市群绿地景观格局与热环境在空间上的相关性,完善了内陆城市群绿地景观格局降温效应理论。

The study provides reference for the overall planning of land use in urban agglomerations and the construction of urban greening projects.Based on the Landsat series image data of the central Shanxi urban agglomeration during five periods from 2010 to 2022,this paper applies ArcGIS,ENVI and other software to invert the surface temperature through the single-window algorithm.The correlation between green landscape pattern and thermal environment was studied.The research shows that:1)From 2010 to 2020,the number and density of patches at all levels of the thermal environment in the central urban agglomeration of Shanxi Province increased in different amplitude,indicating that the degree of fragmentation and spatial heterogeneity increased,and the thermal environment status was improved;2)The green landscape pattern of urban agglomeration has a significant impact on thermal environment.The larger the green landscape area and the stronger the connectivity,the better the cooling effect.3)The typical area of Taiyuan-Yuci urban core was extracted and studied.The results showed that under the grid of 9 km×9 km,different green landscape pattern indices of urban agglomeration had the best mitigation effect on land surface temperature,and the spatial correlation was significant.This paper explores the spatial correlation between green landscape pattern and thermal environment in urban agglomerations,improves the theoretical research on the cooling effect of green landscape pattern in inland urban agglomerations,and provides theoretical basis for future development planning of urban agglomerations.