Journal article
Windblown dust contributes to high PM 2.5 concentrations
Journal of the Air & Waste Management Association (1995), Vol.50(8), p.1440
08/2000
Handle:
https://hdl.handle.net/2376/114237
PMID: 11002606
Abstract
The revised National Ambient Air Quality Standards for PM include fine particulate standards based upon mass measurements of PM2.5. It is possible in arid and semi-arid regions to observe significant coarse mode intrusion in the PM2.5 measurement. In this work, continuous PM10, PM2.5, and PM1.0 were measured during several windblown dust events in Spokane, WA. PM2.5 constituted approximately 30% of the PM10 during the dust event days, compared with approximately 48% on the non-dusty days preceding the dust events. Both PM10 and PM2.5 were enhanced during the dust events. However, PM1.0 was not enhanced during dust storms that originated within the state of Washington. During a dust storm that originated in Asia and impacted Spokane, PM1.0 was also enhanced, although the Asian dust reached Washington during a period of stagnation and poor dispersion, so that local sources were also contributing to high particulate levels. The "intermodal" region of PM, defined as particles ranging in aerodynamic size from 1.0 to 2.5 microns, was found to represent a significant fraction of PM2.5 (approximately 51%) during windblown dust events, compared with 28% during the non-dusty days before the dust events.
Metrics
8 Record Views
Details
- Title
- Windblown dust contributes to high PM 2.5 concentrations
- Creators
- C S Claiborn - Department of Civil & Environmental Engineering, Washington State University, Pullman, USAD FinnT V LarsonJ Q Koenig
- Publication Details
- Journal of the Air & Waste Management Association (1995), Vol.50(8), p.1440
- Academic Unit
- Carson College of Business; Civil and Environmental Engineering, Department of
- Publisher
- United States
- Identifiers
- 99900548192001842
- Language
- English
- Resource Type
- Journal article