基于GEE的福州市城市公园降温效应研究

Research on Cooling Effect of Urban Parks in Fuzhou Based on GEE

在城市化快速发展的同时,热岛效应等一系列问题也日趋严重。公园绿地是城市绿地系统的一个重要组成部分,对改善城市热环境有着十分重要的意义。本文以福州市三环内的26个城市公园为研究对象,利用谷歌地球引擎(GEE)和Landsat 8 OLI/TIRS遥感数据,通过单窗算法反演地表温度(LST),并采用缓冲区分析法量化城市公园的降温效应特征。研究从降温幅度和降温距离两个维度量化了城市公园的降温效应,并分析了影响公园降温效应的主要景观特征因素。结果显示,福州市三环以内城市公园降温效果显著,其降温幅度和降温距离与公园面积和周长显著正相关,而与周长面积比显著负相关,研究以期为城市热环境优化和绿地规划提供了科学依据。

With the acceleration of urbanization in China,problems such as the urban heat island effect are becoming increasingly severe.As a crucial component of urban green spaces,urban parks play a significant role in mitigating urban thermal environments.This study focuses on 26 urban parks within the Third Ring Road of Fuzhou,utilizing Google Earth Engine(GEE)and Landsat 8 OLI/TIRS remote sensing data.The land surface temperature(LST)was inverted using the single window algorithm,and the cooling effect characteristics of urban parks were quantified using buffer analysis.The study quantified the cooling effect of urban parks in terms of cooling magnitude and cooling distance,and analyzed the main factors influencing the cooling effect of parks.The results indicate that urban parks within the Third Ring Road of Fuzhou exhibit significant cooling effects.The cooling magnitude and cooling distance are significantly positively correlated with park area and perimeter,and negatively correlated with the perimeter-to-area ratio.This research aims to provide scientific evidence for optimizing urban thermal environments and green space planning.