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- W2190771187 abstract "Since 1994, a network of air monitoring sites have been operating as part of the Southern California Children’s Health Study, a large epidemiological investigation of the long-term effects of air pollutant exposure on respiratory disease within a population of more than 5600 California school children. We previously reported the results of chemical analysis of particulate organic carbon (OC) and elemental carbon (EC) samples taken at twelve air monitoring sites in the southern half of the state of California over the 5-year period 1994-1998. Samples for the Children’s Health Study continue to be collected over consecutive two week averaging times with sample collection scheduled to end in June, 2004 marking completion of the 10 year study. This report presents the particulate organic carbon (OC) and elemental carbon (EC) concentrations measured during the intermediate three years of this monitoring program (1999-2001). Annual average PM10-equivalent elemental (black) carbon particle concentrations range from 0.05 1.74 μg m 3 over the communities and years studied while annual average organic carbon concentrations are in the range 1.50 17.51 μg m 3. The overall fine particle concentrations show a coherent spatial pattern with very low mass concentrations (circa 5-9 μg m 3) and aerosol carbon concentrations at the northern and southern-most monitoring sites. The highest annual average mass concentrations were found at Mira Loma, Riverside, and Upland, downwind of the Los Angeles-Long Beach urban complex ranging from 18.5 to 27.8 μg m 3 from 1999-2001. Carbonaceous aerosols account for 24 to 62 percent of fine particle concentrations between the sites studied." @default.
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- W2190771187 date "2004-01-01" @default.
- W2190771187 modified "2023-09-24" @default.
- W2190771187 title "Determination of elemental carbon and organic carbon concentrations during the Southern California Children's Health Study, 1999-2001." @default.
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