Spatially-varying surface roughness and ground-level air quality in an operational dispersion model.

Spatially-varying surface roughness and ground-level air quality in an operational dispersion model.
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操作扩散模型中空间变化的表面粗糙度和地面空气质量。

DOI:
10.1016/j.envpol.2013.09.039
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发表时间:
2014
期刊:
1987)
影响因子:
--
通讯作者:
Barnes MJ
Barnes MJ
中科院分区:
--
文献类型:
--
作者:
Barnes MJ

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Urban form controls the overall aerodynamic roughness of a city, and hence plays a significant role in how air flow interacts with the urban landscape. This paper reports improved model performance resulting from the introduction of variable surface roughness in the operational air-quality model ADMS-Urban (v3.1). We then assess to what extent pollutant concentrations can be reduced solely through local reductions in roughness. The model results suggest that reducing surface roughness in a city centre can increase ground-level pollutant concentrations, both locally in the area of reduced roughness and downwind of that area. The unexpected simulation of increased ground-level pollutant concentrations implies that this type of modelling should be used with caution for urban planning and design studies looking at ventilation of pollution. We expect the results from this study to be relevant for all atmospheric dispersion models with urban-surface parameterisations based on roughness.
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