Contributions to light extinction during project MOHAVE

被引:24
作者
Lowenthal, DH
Watson, JG
Saxena, P
机构
[1] Univ Nevada, Desert Res Inst, Reno, NV 89512 USA
[2] Community Coll, Syst Neveda, Reno, NV 89512 USA
[3] Elect Power Res Inst, Palo Alto, CA 94303 USA
关键词
light scattering; extinction efficiency; particle growth mechanisms; water uptake; aerosol acidity;
D O I
10.1016/S1352-2310(99)00449-5
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The contribution of aerosols to light extinction at Meadview, AZ, during summer 1992 was estimated using Mie theory and size-resolved aerosol chemical measurements. Sulfate particle size increased as a function of relative humidity. Twelve-hour average light scattering was estimated to within 15%. Sulfate was the most abundant chemical component in the fine aerosol fraction. On average, Rayleigh scattering, coarse particles, and fine sulfates contributed 39, 21, and 19% to total light extinction. Average estimated light scattering was largely insensitive to assumptions about mixing state, degree of sulfate neutralization and organic carbon water uptake properties. It was estimated that a reduction of Mohave Power Plant (MPP) SO2 emissions corresponding to a contribution of 19% to ambient sulfate would have resulted in a decrease in total light extinction of between 3.3 and 5.3%. (C) 2000 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:2351 / 2359
页数:9
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