Efficient cooling of cities at global scale using urban green space to mitigate urban heat island effects in different climatic regions

《Efficient cooling of cities at global scale using urban green space to mitigate urban heat island effects in different climatic regions》

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作者: Chengcong Wang;Zhibin Ren;Yulin Dong;Peng Zhang;Yujie Guo;Wenjie Wang;Guangdao Bao

来源: URBAN FORESTRY & URBAN GREENING,Vol.74,Issue1,Article 127635

语言: 英文

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作者单位: Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China;School of Forestry, Northeast Forestry University, Harbin 150040, China;University of Chinese Academy of Sciences, Beijing 100049, China;Jilin Provincial Academy of Forestry Sciences, Changchun 130033, China;Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China;School of Forestry, Northeast Forestry University, Harbin 150040, China;University of Chinese Academy of Sciences, Beijing 100049, China;Jilin Provincial Academy of Forestry Sciences, Changchun 130033, China;Department of Systems Engineering, Czech University of Life Sciences Prague, Kamýcká 129, 165 21 Prague 6-Suchdol, Czech Republic;Nature Conservation Agency of the Czech Republic, Kaplanova 1931/1, 148 00 Prague 11-Chodov, Czech Republic;Department of Architecture, University of Pretoria, Bag X 20 Hatfield, Pretoria 0028, South Africa;UWA School of Agriculture and Environment, The University of Western Australia, Australia;School of Biological Sciences, The University of Western Australia, Australia;School of Social Sciences, The University of Western Australia, Australia;Person-Environment-Activity Research Laboratory, Department of Civil, Environmental and Geomatic Engineering, University College London, London, UK;Research Area Spatial Information and Modelling, Leibniz Institute of Ecological Urban and Regional Development (IOER), Weberplatz 1, 01217 Dresden, Germany;Technische Universität Dresden, Institute for Cartography, Helmholtzstr. 10, 01069 Dresden, Germany;Geospatial Sciences, School of Science, STEM College, RMIT University, GPO Box 2476V, Victoria 3001, Australia;School of Tourism and Geography Science, Qingdao University, Qingdao 266071, China;Politecnico di Torino, Interuniversity Department of Regional and Urban Studies and Planning (DIST), Viale Mattioli 39, 10125 Torino, Italy;Queensland University of Technology (QUT), QUT Design Lab, Brisbane, Australia;Queensland University of Technology (QUT), Digital Media Research Centre, Brisbane, Australia

摘要: In the context of rapid urbanization and global warming, how to use urban green space (UGS) with high-efficiency to mitigate the urban heat islands (UHIs) effect in different climate zones has become an urgent issue. However, few studies have provided specific guidance for urban vegetation planning adapting to different climate zones on a global scale. In this study, a cooling effect framework was employed to analyze the influence of UGS patch characteristics, natural and anthropogenic factors on its cooling effect across different climatic zones. We found that the urban cooling islands (UCI) intensity, extent, and gradient of UGS increased with latitude, with lower cooling effect concentrated in arid zones around 30 °N, while the largest (0.38 ha) and smallest (0.24 ha) threshold value of efficiency (TVoE) were found in the temperate and arid climate zones. The larger the UGS area, the better the cooling effect in all climate zones. Moreover, complex shapes have a greater UCI intensity in tropical and temperate zones than other regions, while the normalized difference vegetation index (NDVI) has a stronger effect in arid zones. In the continental zone, patch characteristics had little effect. The overall explanation rate of natural and anthropogenic factors on the cooling effect of UGS was 53.5 %, among which natural factors were approximately twice that of anthropogenic factors. Notably, natural factors dominated in the tropical and arid zones affecting UCI, and anthropogenic factors dominated in the temperate and continental zones. The findings of this study expand our understanding of the cooling effect of UGS in different climatic zones around the world and provide insights for urban sustainable development.