Comprehensive Particulate Matter Modeling: A One Atmosphere Approach

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Photochemical Model Performance and Consistency
James W. Boylan Georgia Department of Natural
Resources - VISTAS Kirk Baker Lake Michigan Air
Directors Consortium - MRPO National RPO
Modeling Meeting Denver, CO May 26, 2004
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Outline

• Comparison of Model Results to IMPROVE
  Measurements (24-hour average)
• MRPO, VISTAS, and MANE-VU
• July 1327, 1999 and January 1-19, 2002
• SHEN, MACA, and UPBU
• Comparison of Model Results to Pittsburgh Super
  Site Measurements (Hourly)
• MRPO and VISTAS
• July 1327, 1999

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Summary of Modeling Systems
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Comparison of Model Results to IMPROVE
Measurements
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IMPROVE vs. Models
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IMPROVE vs. Models
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IMPROVE vs. Models
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IMPROVE vs. Models
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IMPROVE vs. Models
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IMPROVE vs. Models
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Comparison of Model Results to Pittsburgh Super
Site Measurements
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Pittsburgh Super Site July 2001
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Summary

• Given the preliminary nature and diverse modeling
  approaches the results seem to agree fairly well
• None of the modeling approaches seems to be
  consistently closer to the observed values
  performance varies by day and specie
• The three modeling systems compare reasonably
  well to the IMPROVE measurements on 70 of the
  days, but can show large discrepancies on the
  other days.
• Hourly model output at the Pittsburgh Super Site
  are very consistent on a diurnal and synoptic
  scale
• Only one station but the results are encouraging
• Need to evaluate the response of the various
  modeling systems to changes in emissions at
  specific receptor locations.