Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/8125
Title: CO2 absorption/emission and aerodynamic effects of trees on the concentrations in a street canyon in Guangzhou, China
Authors: Li, JF
Zhan, JM
Li, YS 
Wai, OWH 
Keywords: Airflow resistance
CFD simulation
CO2 absorption
CO2 concentration
Street canyon
Tree effects
Issue Date: 2013
Publisher: Pergamon Press
Source: Environmental pollution, 2013, v. 177, p. 4-12 How to cite?
Journal: Environmental pollution 
Abstract: In this paper, the effects of trees on CO2 concentrations in a street canyon in Guangzhou, China are examined by Computational Fluid Dynamics (CFD) simulations of the concentration distribution, taking into account both the CO2 absorption/emission and aerodynamic effects of trees. Simulation results show that, under a 2 m/s southerly prevailing wind condition, CO2 absorption by trees will reduce the CO2 concentration by around 2.5% in the daytime and at the same time the trees' resistance will increase the difference of CO2 concentrations in the street and at the inflow by 43%. As the traffic density increases to 50 vehicles/min, the effect of trees on the ambient CO2 concentration will change from positive to negative. At night, trees have a negative effect on the concentration in the street canyon mainly because of their resistance to airflow. When environmental wind changes, the effect of trees will be different.
URI: http://hdl.handle.net/10397/8125
ISSN: 0269-7491
EISSN: 1873-6424
DOI: 10.1016/j.envpol.2013.01.016
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