打印

作者

Richard Lemoine-Rodríguez;Luis Inostroza;Ina Falfán;Ian MacGregor-Fors

来源

URBAN FORESTRY & URBAN GREENING,Vol.74,Issue1,Article 127633

语言

英文

关键字

Cooling range;Green infrastructure;Heat mitigation;SUHI;Urban climate;Urban planning

作者单位

Institute of Geography, Ruhr-Universität Bochum, Universitätsstr. 150, 44780 Bochum, Germany;Geolingual Studies Team, University of Würzburg, Am Hubland 97074, Würzburg, Germany;Earth Observation Center, German Aerospace Center, Oberpfaffenhofen 82234, Germany;Faculty of Regional Development and International Studies, Mendel University in Brno, Zemědělská 1/1665, 613 00 Brno, Czech Republic;Universidad Autónoma de Chile, 7500912 Santiago, Chile;Red de Ambiente y Sustentabilidad, Instituto de Ecología, A.C., Carretera antigua a Coatepec 351, El Haya, Xalapa, 91073 Veracruz, Mexico;Laboratorio de Restauración Ecológica, Instituto de Biología, Universidad Nacional Autónoma de México, Circuito Exterior, 04510, Coyoacán, Ciudad de México, Mexico;Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, FI-15140 Lahti, Finland;Institute of Geography, Ruhr-Universität Bochum, Universitätsstr. 150, 44780 Bochum, Germany;Geolingual Studies Team, University of Würzburg, Am Hubland 97074, Würzburg, Germany;Earth Observation Center, German Aerospace Center, Oberpfaffenhofen 82234, Germany;Faculty of Regional Development and International Studies, Mendel University in Brno, Zemědělská 1/1665, 613 00 Brno, Czech Republic;Universidad Autónoma de Chile, 7500912 Santiago, Chile;Red de Ambiente y Sustentabilidad, Instituto de Ecología, A.C., Carretera antigua a Coatepec 351, El Haya, Xalapa, 91073 Veracruz, Mexico;Laboratorio de Restauración Ecológica, Instituto de Biología, Universidad Nacional Autónoma de México, Circuito Exterior, 04510, Coyoacán, Ciudad de México, Mexico;Faculty of Biological and Environmental Sciences, University of Helsinki, Niemenkatu 73, FI-15140 Lahti, Finland

摘要

Urban areas are particularly vulnerable to climate change due to the Urban Heat Island (UHI) effect, which can be mitigated by urban vegetation through shading and evapotranspiration. Nevertheless, there is still a lack of spatially explicit information on the cooling capacity of green infrastructure for most Latin American cities. In this study, we employed Land Surface Temperature (LST) of the Neotropical Mexican city of Xalapa to (1) analyze its Surface UHI (SUHI) compared to its peri and extra-urban areas, (2) to assess the cooling capacity of urban green spaces larger than 1 ha, and (3) to evaluate the role of green spaces’ size, shape and their surrounding tree cover percentage (Tc) on green spaces cooling range. We evaluated the cooling range of green spaces and their relationships with green spaces metrics and Tc via a linear mixed-effect model and identified threshold values for the variables at 25 m, 50 m, 100 m, and 200 m from the borders of green spaces through Classification and Regression Trees. Xalapa exhibits a SUHI of 1.70 °C compared to its peri-urban area and 4.95 °C to the extra-urban area. Green spaces > 2 ha mitigated heat at ~2 °C and the cooling range was influenced by the size of green spaces ≥ 2.8 ha and Tc > 21% at 50 m and only by Tc surrounding the green spaces at 100 m and 200 m. This shows that the size threshold of urban green spaces should be complemented with the presence of Tc starting at least 50 m to maximize the cooling capacity provided by the green infrastructure. Planning agendas should account for the interaction between the size of green spaces and the cumulative cooling effect of scattered vegetation inside urban areas towards compact green cities to cope with urban warming.