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Effect of composition on aerosol light scattering efficiencies |
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| Institution: | 1. Nelson Mandela African Institution of Science and Technology, P.O. Box 447, Arusha, Tanzania;2. One Health Centre, School of Veterinary Medicine, University of California, Davis, CA, USA;1. International Centre for Ecological Engineering and Department of Environmental Management, University of Kalyani, Kalyani 741 235, West Bengal, India;2. Department of Zoology, Chandernagore College, Chandernagore, Hooghly, West Bengal, India;1. School of Public Health, Guangdong Pharmaceutical University, Guangzhou, Guangdong Province 510310, China;2. Key Research Center of Liver Regulation for Hyperlipidemia SATCM/Class III Laboratory of Metabolism SATCM, Guangdong TCM Key Laboratory for Metabolic Diseases, Guangdong Pharmaceutical University, Guangzhou 510006, China |
| Abstract: | Forecasts of the impact of emissions changes on visibility use light scattering efficiencies—the change in the amount of light scattered with a change in mass of an aerosol constituent. This paper demonstrates how light scattering efficiencies depend on interactions between the aerosol constituents. Calculations are presented for two model aerosols: NH4HSO4 droplets and a ‘typical’ urban aerosol. These calculations demonstrate that the traditional means of predicting visibility impairment for increases in atmospheric emissions is not generally appropriate. Different light scattering efficiencies are needed for distinct meteorological conditions and aerosol compositions thus for typical high and low visibility events. |
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