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A single tree model to consistently simulate cooling, shading, and pollution uptake of urban trees

Pace, Rocco; De Fino, Francesco; Rahman, Mohammad A.; Pauleit, Stephan; Nowak, David J.; Grote, Rüdiger

Extremely high temperatures, which negatively affect the human health and plant performances, are becoming more frequent in cities. Urban green infrastructure, particularly trees, can mitigate this issue through cooling due to transpiration, and shading. Temperature regulation by trees depends on feedbacks among the climate, water supply, and plant physiology. However, in contrast to forest or general ecosystem models, most current urban tree models still lack basic processes, such as the consideration of soil water limitation, or have not been evaluated sufficiently. In this study, we present a new model that couples the soil water balance with energy calculations to assess the physiological responses and microclimate effects of a common urban street-tree species (Tilia cordata Mill.) on temperature regulation. We contrast two urban sites in Munich, Germany, with different degree of surface sealing at which microclimate and transpiration had been measured. Simulations indicate that differences in wind speed and soil water supply can be made responsible for the differences in transpiration. Nevertheless, the calculation of the overall energy balance showed that the shading effect, which depends on the leaf area index and canopy cover, contributes the most to the temperature reduction at midday. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000125527
Veröffentlicht am 02.11.2020
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung (IMK-IFU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 0020-7128, 1432-1254
KITopen-ID: 1000125527
HGF-Programm 12.02.01 (POF III, LK 01)
Effects of land use and climate change
Erschienen in International journal of biometeorology
Vorab online veröffentlicht am 18.10.2020
Nachgewiesen in PubMed
Web of Science
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