PMID: 15373360Sep 18, 2004Paper

Variation of mass scattering efficiencies in IMPROVE

Journal of the Air & Waste Management Association
Douglas H Lowenthal, Naresh Kumar

Abstract

The Interagency Monitoring of Protected Visual Environments (IMPROVE) equation used to assess compliance under the U.S. Environmental Protection Agency (EPA) Haze Rule assumes that dry mass scattering efficiencies for aerosol chemical components are constant. However, examination of aerosol size distributions and chemical composition during the Big Bend Regional Aerosol and Visibility Observational Study and the Southeastern Aerosol and Visibility Study suggests that volume and mass scattering efficiencies vary directly with increasing particle light scattering and aerosol mass concentration. This is consistent with the observation that particle distributions were shifted to larger sizes under more polluted conditions and appears to be related to aging of the aerosol during transport to remote locations.

References

Jun 21, 2002·Journal of the Air & Waste Management Association·John G Watson
Oct 17, 2002·Environmental Monitoring and Assessment·Judith C ChowL Willard Richards
Sep 19, 2003·Journal of the Air & Waste Management Association·Douglas H Lowenthal, Naresh Kumar
Jan 24, 1992·Science·R J CharlsonD J Hofmann

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Citations

Dec 12, 2007·Journal of the Air & Waste Management Association·Marc PitchfordJenny Hand
May 8, 2015·Journal of the Air & Waste Management Association·Douglas LowenthalNaresh Kumar

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