A prognostic physico-chemical model of secondary and marine inorganic multicomponent aerosols II. Model tests |
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| Institution: | 1. Institute of Reproductive & Child Health/Ministry of Health Key Laboratory of Reproductive Health, School of Public Health, Peking University, Beijing 100191, China;2. Department of Pathobiology & Diagnostic Investigation, College of Veterinary Medicine, Michigan State University, East Lansing 48824, USA;3. Department of Occupational & Environmental Health Sciences, School of Public Health, Peking University, Beijing 100191, China;4. Laboratory for Earth Surface Processes, College of Urban & Environmental Sciences, Peking University, Beijing 100871, China;5. Jiangsu Provincial Academy of Environmental Science, Nanjing 210036, China;1. Key Laboratory of Aerosol Science and Technology, State Key Laboratory of Loess Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi''an 710061, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. Center for Excellence in Urban Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China;4. National Center for Atmospheric Research (NCAR), Boulder 80303, USA;5. Laboratory of Atmospheric Chemistry, Paul Scherrer Institute (PSI), Villigen 5232, Switzerland;6. School of Human Settlements and Civil Engineering, Xi''an Jiaotong University, Xi''an 710049, China |
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| Abstract: | The accuracy and efficiency of the sectional multicomponent aerosol model SEMA, described in the first part of this paper, are tested. Comparisons of results of an equilibrium version of SEMA with results of the equilibrium models SEQUILIB and AIM show good agreement for relative humidities above 60% and thus validate the thermodynamic portion of the model. Tests of the dynamic portion of SEMA show the reliability of the model down to a minimum number of four sections. The results of a model application give evidence that kinetic limitations may be important in the formation of secondary aerosol species by condensation of sulphuric acid, nitric acid, and ammonia on sea salt aerosol. The concentrations of the chemical components of marine aerosol may be substantially different from their thermodynamic equilibrium concentrations in the polluted coastal atmosphere. |
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