Improving the Chem in WRF/Chem William R. Stockwell

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Improving the Chem in WRF/ChemWilliam R.
Stockwell Howard University (HU) Dept. of
Chemistry/HU Program of Atmospheric Sciences
(HUPAS)NOAA Center for Atmospheric Sciences
(NCAS)Developer of chemical schemes used in air
quality models such as WRF/Chem, CMAQ, MM5/Chem,
RADM2, etc.

• Air Quality Model Problems
• Models fail to predict observed ranges of ozone
  mixing ratios.
• Comparison of space-based measurements with air
  quality model simulations shows that models
  overestimate NO2 mixing ratios near sources and
  greatly under-predict them in rural regions.
• Past chemical mechanism development and
  evaluation for highly polluted conditions may
  have contributed to these and other model
  deficiencies.

• Proposed Research
• Implement the gas-phase Regional Atmospheric
  Chemical Mechanism (RACM2) and extended aerosol
  chemistry based on RACM2 in WRF/Chem.
• Implement RACM2 and aerosol chemistry in
  WRF/Chem.
• Assist in the comparison of WRF/Chem simulations
  with satellite, aircraft and field data.
• Perform sensitivity tests to prioritize further
  mechanism development efforts.