Fine particulate chemical composition and light extinction at Meadview, AZ

Journal Article · Fri Dec 15 04:00:00 EST 2006 · Journal of the Air and Waste Management Association

DOI:https://doi.org/10.1080/10473289.2006.10464574· OSTI ID:20838181

Eatough, Delbert J; Cui, Wenxuan; Hull, Jeffery; Farber, Robert J ^[1]

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1. Brigham Young University, Provo, UT (United States). Department of Chemistry and Biochemistry

The concentration of fine particulate nitrate, sulfate, and carbonaceous material was measured for 12-hr daynight samples using diffusion denuder samplers during the Project Measurement of Haze and Visibility Effects (MOHAVE) July to August 1992 Summer Intensive study at Meadview, AZ, just west of Grand Canyon National Park. Organic material was measured by several techniques. Only the diffusion denuder method measured the semivolatile organic material. Fine particulate sulfate and nitrate (using denuder technology) determined by various groups agreed. Based on the various collocated measurements obtained during the Project MOHAVE study, the precision of the major fine particulate species was {+-} 0.6 {mu}g/m{sup 3} organic material, {+-} 0.3 {mu}g/m{sup 3} ammonium sulfate, and {+-} 0.07 {mu}g/m{sup 3} ammonium nitrate. Fine particulate organic material was the principal particulate contributor to light extinction during the study period, with fine particulate sulfate as the second most important contributor. Particle light extinction was dominated by sulfate and organic material during periods of lowest light extinction. Combination of the extinction data and chemical mass balance analysis of sulfur oxides sources in the region indicate that the major anthropogenic contributors to light extinction were from the Los Angeles, CA, and Las Vegas, NV, urban areas. Mohave Power Project associated secondary sulfate was a negligible contributor to light extinction. 49 refs., 12 figs., 7 tabs.

• OSTI ID: 20838181
• Journal Information: Journal of the Air and Waste Management Association, Journal Name: Journal of the Air and Waste Management Association Journal Issue: 12 Vol. 56; ISSN JAWAEB; ISSN 1047-3289
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
ABSORPTION
ACCURACY
AIR POLLUTION MONITORING
AIR SAMPLERS
ARIZONA
CARBONACEOUS MATERIALS
CHEMICAL COMPOSITION
DAILY VARIATIONS
ECOLOGICAL CONCENTRATION
HUMIDITY
NATURE RESERVES
NITRATES
ORGANIC MATTER
PARTICULATES
SULFATES
USA
VISIBILITY
VISIBLE RADIATION