The mitigation effect of configuration and context optimization of urban holdings on heat island

35th International Symposium on Remote Sensing of Environment

地球科学;生态环境科学

Liu, Y.P.^1,2 ; Yu, D.Y.^1,2 ; Xun, B.^1,2

State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China^1

Academy of Disaster Reduction and Emergency Management, Ministry of Civil Affairs, Ministry of Education, Beijing 100875, China^2

关键词: Land surface temperature;    Mitigation effects;    Mitigation methods;    Remote sensed data;    Robust statistics;    Urban heat island;    Urban heat island intensities;    Vegetation coverage;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/17/1/012161/pdf
DOI  :  10.1088/1755-1315/17/1/012161

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The urban heat island (UHI) phenomenon has become a serious problem in recent years. It is necessary to study the mitigation methods and quantify their effects on UHI. In this paper, based on the remote sensed data, an empirical model was established as a negative function of land surface temperature (LST) to vegetation coverage. Urban heat island intensity (UHII) was estimated by a robust statistic algorithm. Compared with the current condition (vegetation coverage equaling to 0%), five high vegetation coverage building scenarios (10%, 20%, 30%, 40%, and 50%) were designed to explore mitigation effects on UHI separately. The results showed that the mean LST increase by about 0.5°C when vegetation coverage decrease by 0.1. UHII has a considerable decrease when the scenarios of vegetation coverage equaling to 20% and 40%, respectively. The reasonable vegetation configuration is the effective UHI mitigation.