Spatial representativeness and scales of transport during the 1995 integrated monitoring study in California's San Joaquin Valley

Daily measurements of PM 10 mass and chemical composition were obtained for the period 1–14 November 1995 from a saturation monitoring network around Corcoran, and for varying portions of the period 9 December 1995–6 January 1996 for three networks around Bakersfield, Fresno, and the Kern Wildlife R...

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Veröffentlicht in:Atmospheric environment (1994) 1999-12, Vol.33 (29), p.4775-4786
Hauptverfasser: Blanchard, Charles L, Carr, Edward L, Collins, John F, Smith, Ted B, Lehrman, Donald E, Michaels, Harvey M
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container_end_page 4786
container_issue 29
container_start_page 4775
container_title Atmospheric environment (1994)
container_volume 33
creator Blanchard, Charles L
Carr, Edward L
Collins, John F
Smith, Ted B
Lehrman, Donald E
Michaels, Harvey M
description Daily measurements of PM 10 mass and chemical composition were obtained for the period 1–14 November 1995 from a saturation monitoring network around Corcoran, and for varying portions of the period 9 December 1995–6 January 1996 for three networks around Bakersfield, Fresno, and the Kern Wildlife Refuge, in California's San Joaquin Valley. During the latter period, monitoring locations were also operated along the boundaries and across the width of the Valley. The Corcoran, Bakersfield, and Fresno networks consisted of 12–25 sites, located in areas of about 300–800 km 2. Each network also included one core site, situated at a pre-existing monitoring location, with more extensive and more temporally resolved measurements. Mean concentrations of PM 10 and its constituents varied from core-site concentrations by 20% or more over distances ranging from 4 to 14 km. Local source influences were observed to affect sites over distances of less than 1 km, but primary particulate emissions were also transported over urban or sub-regional scales of approximately 10–30 km during the winter and greater than 30 km in the fall. During winter, gas-phase precursors of secondary aerosol may have been transported over distances of approximately 100 km, but little evidence was found for transport of primary PM on such a scale.
doi_str_mv 10.1016/S1352-2310(99)00284-8
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source Elsevier ScienceDirect Journals
subjects Background concentration
California
Particulate matter
Range of influence
San Joaquin Valley
Spatial representativeness
Stagnation
Transport
title Spatial representativeness and scales of transport during the 1995 integrated monitoring study in California's San Joaquin Valley
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