FORMATION OF SULPHURIC ACID AEROSOLS AND CLOUD CONDENSATION NUCLEI: AN EXPRESSION FOR SIGNIFICANT NUCLEATION AND MODEL COMPRARISON |
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| Affiliation: | 2. Department of Physics, P.O. Box 9, FIN-0014 University of Helsinki, Finland;3. Institute for Tropospheric Research, Permoserstr. 15, D-04318 Leipzig, Germany;4. Process and Aerosol Measurement Technology, Gerhard Mercator-Universität Duisburg, 04708 Duisburg, Germany;1. Department of Chemistry, Colorado State University, Fort Collins 80523, CO, United States;2. Transportation Pollution Research Center, National Institute of Environmental Research, Incheon, South Korea;3. Department of Environmental Science, Hankuk University of Foreign Studies, Yongin, South Korea;4. Department of Environmental Engineering, Kyungpook National University, Daegu, South Korea;1. Istituto per lo Studio degli Ecosistemi, Consiglio Nazionale delle Ricerche, Via Madonna del Piano 10, Sesto Fiorentino, 50019 Firenze, Italy;2. Dipartimento di Scienze Bio-Agroalimentari, Consiglio Nazionale delle Ricerche, Piazzale Aldo Moro 7, 00185 Roma, Italy;3. School of Biology, Indian Institute of Science Education and Research, Thiruvananthapuram, 695016 Kerala, India;1. College of Chemistry, Zhengzhou University, Zhengzhou, 450000, China;2. Research Institute of Environmental Sciences, Zhengzhou University, Zhengzhou, 450000, China;3. Department of Environmental Protection of Henan Province, Zhengzhou, 450001, China;1. Division of Ergonomics and Aerosol Technology, Lund University, Box 118, SE-22100, Lund, Sweden;2. Division of Combustion Physics, Lund University, Box 118, SE-221 00, Lund, Sweden;3. School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW, 2052, Australia;4. National Research Centre for the Working Environment, 2100, Copenhagen, Denmark;5. Division of Nuclear Physics, Lund University, Box 118, SE-221 00, Lund, Sweden;6. Center for Aerosol and Cloud Chemistry, Aerodyne Research, Inc., 45 Manning Rd., Billerica, MA, 01821, USA |
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| Abstract: | A new analytical expression has been derived to predict atmospheric conditions where homogeneous water–sulphuric acid nucleation will have a significant effect on aerosol and cloud condensation nuclei population. In the expression, the condensational sink due to pre-existing aerosol particles and source due to chemical production of sulphuric acid have been taken into account. The analytical expression has been derived using a sectional aerosol dynamic model including nucleation, condensation, coagulation, deposition and sulphuric acid formation in the gas phase. In the present study we have also compared the sectional model with modal and monodisperse models. All models may be used for predicting the onset of significant new particle formation. However, the computationally more efficient models—monodisperse, modal, and sectional with low number of sections—over- or underpredict particle formation in some situations. |
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