UrbanRural and Elevation Pattern

1
Urban-Rural and Elevation Pattern

• Prepared for EPA OAQPS
• Richard Scheffe
• by
• Rudolf B. Husar
• Center for Air Pollution Impact and Trend
  Analysis, CAPITA
• Washington University, St. Louis
• Draft, March, 2001

2
The PM2.5 FRM Network
3
PM2.5 Urban/Rural Pattern

• In the winter months the PM2.5 is highest (16-20
  mg/m3) is the urban areas of the industrial
  corridor, Illinois-New York.
• The remote sites of the East show 8-12 mg/m3
  seasonal average concentration.

• In the summer months, the Eastern PM2.5 is
  highest (22-26 mg/m3) over a broad region of the
  the Southeast, adjacent to the S. Appalachian
  Mts.
• In the summer, urban sites show seasonal average
  PM2.5 only 1-2 mg/m3 above the surrounding
  regional values.
• Hence, urban excess PM2.5 in the East is a winter
  phenomenon. In the summer, the PM2.5 is regional.