Skip common site navigation and headers
United States Environmental Protection Agency
Exposure Research
Begin Hierarchical Links EPA Home > Research & Development > Exposure Research > Publications/Presentations > End Hierarchical Links

 

Mapping Annual Mean Ground-Level PM2.5 Concentrations Using Multiangle Imaging Spectroradiometer Aerosol Optical Thickness Over the Contiguous United States

spacer
spacer
Abstract:We present a simple approach to estimating ground-level fine particle (PM2.5, particles smaller than 2.5 um in diameter) concentration using global atmospheric chemistry models and aerosol optical thickness (AOT) measurements from the Multi- angle Imaging SpectroRadiometer (MISR). The method uses seasonally averaged data in 2001 for the United States and compares the results with EPA PM2.5 ground-level observations, Overall, the estimated PM2.5 concentrations are within 20% of EPA observations. In addition, estimated PM2.5 concentrations capture the spatial and seasonal patterns slightly better than the surface level PM2.5 concentration predicted using the GEOS-CHEM model alone. The estimated PM2.5 concentrations also showed the potential to be less influenced by AOT prediction biases in GEOS-CHEM or the Georgia Tech/Goddard Global Ozone Chemistry Aerosol Radiation and Transport (GOCART) model since MISR AOT is able to bring in more urban scale variation of particulate matter pollution. With the rapid development of model capabilities, we expect the weak correlation between model AOT and MISR AOT measurements to be improved significantly in the future and estimated PM2.5 concentrations by this simple approach will be more comparable with observations.
spacer
Citation:Liu, Y., R. Park, Q. Li, V. Kilaru, J. Sarnat, and D. J. Jacobs. Mapping Annual Mean Ground-Level PM2.5 Concentrations Using Multiangle Imaging Spectroradiometer Aerosol Optical Thickness Over the Contiguous United States. JOURNAL OF GEOPHYSICAL RESEARCH. American Geophysical Union, Washington, DC, 109:D22206,doi:10.1029/2, (2004).
spacer
spacer
Contact: Chris Siebert - (702) 798-2234 or siebert.christopher@epa.gov
spacer
Division: Environmental Sciences Division
spacer
Branch: Landscape Characterization Branch (RTP)
spacer
Product Type: Journal
spacer
Published: 10/04/2004
spacer
Downloads:
spacer
Bullet Item Mapping Annual Mean Ground-Level PM2.5 Concentrations Using Multiangle Imaging Spectroradiometer Aerosol Optical Thickness Over the Contiguous United States
spacer
spacer
Related Entries:
spacer
Bullet Item Atmospheric Ecosystem Stressor Pattern and Trend Analysis
spacer Relationship Reason:   A Project of the Product
spacer
spacer
spacer

 

ORD Home | Search EPA | Search NERL | Search EIMS | Contacts | Help

 
Begin Site Footer

EPA Home | Privacy and Security Notice | Contact Us

Last Updated on Monday, October 22, 2007
URL: http://cfpub.epa.gov