visitante ::
identificación
|
|||||||||||||||
Buscar | Enviar | Ayuda | Servicio de Bibliotecas | Sobre el DDD | Català English Español |
Página principal > Artículos > Artículos publicados > How do street trees affect urban temperatures and radiation exchange? : |
Fecha: | 2022 |
Resumen: | Street trees are an important driver of street microclimate through shading and transpirative cooling, which are key mechanisms for improving thermal comfort in urban areas. Urban canopy models (UCM) with integrated trees are useful tools because they represent the impacts of street trees on neighborhood-scale climate, resolving the interactions between buildings, trees and the atmosphere. In this study, we present the results of a measurement campaign where vehicle transects were completed along two similar parallel streets of Barcelona with different tree densities, recording upward and downward radiation fluxes, air temperature and humidity at street level. These observations are used to evaluate and improve the multi-layer UCM Building Effect Parameterization with Trees (BEP-Tree). Prior simulations of the model revealed insufficient heat exchange between the canyon surfaces and the air at the lowest vertical levels inside the deep canyons, which we solve by including turbulent buoyancy driven wind velocity in the model. Air temperatures are 2. 7 o C higher in the street with fewer trees when wind direction is perpendicular to the streets. The BEP-Tree simulations demonstrate good agreement with the observations in terms of temperature and radiation, and capture the diurnal evolution of temperature and radiation between the two streets. |
Ayudas: | European Commission 818002 Ministerio de Ciencia e Innovación CEX2019-000940-M |
Nota: | Altres ajuts: acords transformatius de la UAB |
Nota: | Unidad de excelencia María de Maeztu CEX2019-000940-M |
Derechos: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. |
Lengua: | Anglès |
Documento: | Article ; recerca ; Versió publicada |
Materia: | Street trees ; Urban vegetation ; Thermal regulation ; Urban canopy model |
Publicado en: | Urban climate, Vol. 46 (December 2022) , art. 101288, ISSN 2212-0955 |
22 p, 11.3 MB |
Postprint 30 p, 1.8 MB |