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 />
Crossroads:<br />
Advances and Opportunities<br />
• Urban predictions on now on firmer bases with UCP formulations,<br />
model formulations can become even more sophisticated<br />
• New opportunities (base analyses & “what if” scenarios include:<br />
–Advanced AQ modeling, exposure assessments<br />
–Improved urban dispersion, threat assessments<br />
–UHI assessments, urban climate analyses<br />
–Hydrological and flooding assessments<br />
–Urban design and architecture for ventilation and comfort<br />
analyses<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 />
Part 2c: <strong>Fine</strong> <strong>Scale</strong> Modeling Issues<br />
Goal: Realistic outputs from<br />
fine grid WRF mesoscale<br />
modeling.<br />
• Evolution <strong>of</strong> mesoscale<br />
•Capabilities: Available/ growing computer<br />
capabilty/capacity and evolving modeling<br />
system<br />
•Issues: Grid sizes now <strong>of</strong> same order or<br />
smaller as pbl heights, turbulence<br />
(Wyngaard’s “terra Incognita” regime)<br />
•Problems: <strong>Fine</strong> grid modeling needed to<br />
resolve observed features<br />
•Challenges: Determining and removing or<br />
reducing the levels <strong>of</strong> stochastic model noise<br />
•Approaches: WRF with parameterized SG<br />
physics options<br />
WRF with LES<br />
Conduct PULSE Study<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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