02_20_Lei - A canopy model of mean winds through urban...

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    A canopy model of mean  winds through urban areas O. COCEAL and S. E. BELCHER University of Reading, UK
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    Motivation urban areas have an effect on mesoscale weather  processes local winds within urban areas need to be considered  for local weather forecasts and building design  applications urban air quality is becoming an issue of increasing  concern, and the processes controlling mixing and  transport of pollutants  have a wide range of scales
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  The dynamical effect of urban areas is usually represented in  NWP at present through a simple  roughness length . Problems: gives no information on the mixing and transport within the urban  canopy roughness length  can be defined only when the wind profile near  the surface is logarithmic, sometimes difficult to measure not practical, and not desirable, to compute the flow around every  building in a big city Need a more sophisticated method of representing the  dynamical effects of urban areas than a  roughness length . Motivation
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02_20_Lei - A canopy model of mean winds through urban...

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