Modelling the formation of H₂SO₄–H₂O particles in rural, urban and marine conditions

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• 作者：Pirjola ; Liisa ; Kulmala ; Markku
• 关键词：Formation of atmospheric aerosols ; Sulphuric acid ; Dimethylsulphide ; UV radiation
• 刊名：Atmospheric Research
• 出版年：1998
• 出版时间：May, 1998
• 年：1998
• 卷：46
• 期：3-4
• 页码：321-347
• 全文大小：312 K

文摘

The factors which affect the formation of new sulphuric acid particles in different atmospheric conditions are investigated. An atmospheric chemistry gas phase box model coupled to a three mode integral aerosol dynamics model is used. The simulations show the dependence of the concentration of nucleation mode particles on initial pre-existing particles, the intensity of UV radiation, the emissions of dimethylsulphide (DMS) and the ratio of emissions of hydrocarbons (HC) and NO_x present in the atmosphere. Eight different basic cases are simulated in urban, rural and marine conditions. The effects of pre-existing particles as a sink of sulphuric acid are clearly seen. The increased UV radiation is also seen to enhance particle formation via sulphuric acid route significantly.