Fine Scale Meteorology & Air Quality Models - School of Architecture ...
Fine Scale Meteorology & Air Quality Models - School of Architecture ...
Fine Scale Meteorology & Air Quality Models - School of Architecture ...
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ASI2_Lecture 3_7/12/2011<br />
HYPOTHESIS:<br />
Anthropogenic<br />
heating is important<br />
model variable in<br />
urban heat island<br />
simulations<br />
RMSE for T2 decreased<br />
26% (18 stations in<br />
Houston) using BEP+BEM<br />
vs BEP alone<br />
Martilli et al, 2011<br />
Building Energy Model (BEM) in WRF<br />
representing indoor-outdoor heat exchanges<br />
• Time-varying room air temperature and air humidity are estimated<br />
• Natural ventilation, heat generated by equipment and occupants,<br />
heat transfer through the walls, and radiation through windows<br />
• Heat generated from cooling(air conditioning)/heating the indoor air<br />
• Available since WRF3. 2<br />
sf_surface_physics = 2 (Noah), sf_urban_physics = 3<br />
ASI 2: URBAN works CLIMATE with BEP AND and AIR BouLac POLLUTION and MYJ<br />
<strong>School</strong> <strong>of</strong><br />
PBL<br />
<strong>Architecture</strong>,<br />
onlyThe Chinese University <strong>of</strong> Hong Kong, Hong Kong, 7-8 Dec 2011<br />
NUDAPT ‐ 44 UCPs<br />
• Mean, Std Dev <strong>of</strong> building heights<br />
• Plan-area weighted mean building<br />
height<br />
• Height Histogram (5-m increments)<br />
• Plan area fraction (Bldg area total sfc<br />
area)<br />
• Plan area density (<strong>Air</strong> volume by<br />
Bldg)<br />
• Ro<strong>of</strong> area density (Like LAI)<br />
• Complete aspect ratio A sfc /A T<br />
• Frontal area index (dd)) A proj /A T<br />
• Frontal area density (dd) FAI/height<br />
• Height-to-width ratio (some)<br />
• Sky view factor (some)<br />
• & Roughness length<br />
• & Displacement height<br />
BEP, BEP_BEM UCPs<br />
• Street width , w<br />
• Building width, b<br />
• Distribution <strong>of</strong> building heights<br />
• Street direction (either N-S and E-W)<br />
• Urban fraction (from other tables<br />
based on Land use)<br />
• Thermal parameters (heat capacity,<br />
thermal diffusivity<br />
• Roughness lengths<br />
• Albedo<br />
• Emissivity<br />
ASI 2: URBAN CLIMATE AND AIR POLLUTION <strong>School</strong> <strong>of</strong> <strong>Architecture</strong>, The Chinese University <strong>of</strong> Hong Kong, Hong Kong, 7-8 Dec 2011<br />
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