Status of Air Quality Modeling

1
Status of Air Quality Modeling
June 14, 2006
2
Ozone Analyses

• District
• CALMET/SAPRC99 Analysis 5 Episodes
• Base Year Performance Reasonable gt Hit Peaks
  in Eastern Basin gt Transport Issue to Santa
  Clarita
• MM5/SAPRC99 Analyses Similar Spatial Outcome
  with Lower Ozone Production
• Testing Pseudo Station Approach to Drive
  Transport
• Testing Hybrid Meteorological Modeling Approaches

3
Ozone Analyses

• ARB
• MM5/CALMET/SAPRC99 Analysis 1997 August
  Episode
• gt 1st Glimpse of 2020 Isopleth
• Seasonal Modeling July 5- October 31, 1997
  Continuing
• Upcoming Changes
• Updated Gridded Inventory with George II (end
  June)
• Revert to Older Biogenic Fields

4
2020 Preliminary Ozone Isopleth
5
PM2.5/10 Analyses

• Preliminary 2005 Base-Year Analyses gt EPA Clean
  WRAP Global Model (WRAP Global Model
  cleaner)
• gt CAMx/AERO-LT EFC (split nitrate)
• Mixed Response by Species
• Ozone Performance Better than Expected
• Developing Inputs for the PM2.5 Episode

6
Next Steps

• Rerun Ozone and PM Analyses with New Emissions
  Inventory
• Continue Testing Boundary Conditions
• Develop Day Specific Episodic PM Emissions
• Discuss Applicability of Hybrid Meteorological
  Modeling with EPA
• Discuss Application of RRF with EPA