A tool for estimating the contribution of water-soluble organic compounds to the particle mass and condensational growth in the atmosphere |
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| Authors: | Tatu Anttila Veli-Matti Kerminen Markku Kulmala |
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| Institution: | 2. University of California, Irvine, CA, United States;1. LAPC, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China;2. China National Environmental Monitoring Center, Beijing, China;1. Institute for Environmental and Climate Research, Jinan University, Guangzhou 511443, China;2. JNU–QUT Joint Laboratory for Air Quality Science and Management, Jinan University, Guangzhou 511443, China;3. International Laboratory for Air Quality and Health, Queensland University of Technology, Brisbane, QLD 4001, Australia;4. State Environmental Protection Key Laboratory of Regional Air Quality Monitoring, Guangdong Environmental Monitoring Center, Guangzhou 510308, China;5. State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China |
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| Abstract: | In this theoretical investigation, we elucidated several factors governing the ability of organic, water-soluble vapours to participate into either the secondary organic aerosol formation or particle condensational growth in the atmosphere. The corresponding requirements for physico-chemical properties of the vapour were estimated. These estimates were also compared with the properties of several difunctional carboxylic acids identified in the atmosphere. Our analysis indicates that while many of the considered compounds are expected to contribute to the total particle mass in the atmosphere, their role in particle condensational growth process remains uncertain. This uncertainty emerges from the fact that the saturation ratio of an organic vapour does not alone determine its ability to act as a “nonvolatile” compound. Instead, the hygroscopic and chemical properties of the vapour, as well as the particle pH and size, have also to be taken into account. |
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| Keywords: | Secondary organic aerosol Aerosol dynamics Organic acids Aqueous phase Phase partitioning |
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