Interactive comment on “Understanding the formation of biogenic secondary organic aerosol from α-pinene in smog chamber studies: role of organic peroxy radicals” by B. Bonn et al
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چکیده
This paper presents a hypothesis on how new particles may be formed from organic precursors in the absence of sulphuric acid. The authors propose a secondary ozonide, which is the product of a stabilized Criegee intermediate and a carbonyl compound, to be the nucleating agent, and peroxy radicals to be responsible for the initial growth. At a later stage “regular” condensation is assumed to take place. As a result, small particles exist of a mixture of stable and unstable compounds. The latter may remain
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Interactive comment on “Understanding the formation of biogenic secondary organic aerosol from α-pinene in smog chamber studies: role of organic peroxy radicals” by B. Bonn et al
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Interactive comment on “Understanding the formation of biogenic secondary organic aerosol from α-pinene in smog chamber studies: role of organic peroxy radicals” by B. Bonn et al
متن کامل
Understanding the formation of biogenic secondary organic aerosol from α-pinene in smog chamber studies: role of organic peroxy radicals
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Understanding SOA formation: role of organic peroxy radicals
Understanding the formation of biogenic secondary organic aerosol from α-pinene in smog chamber studies: role of organic peroxy radicals B. Bonn, H. Korhonen, T. Petäjä, M. Boy, and M. Kulmala Department of Physical Sciences, University of Helsinki, Helsinki, Finland School of Earth and Environment, University of Leeds, Leeds, UK now at: Department of Plant Physiology, Estonian University of Li...
متن کاملThe link between organic aerosol mass loading and degree of oxygenation: an α-pinene photooxidation study
A series of smog chamber (SC) experiments was conducted to identify factors responsible for the discrepancy between ambient and SC aerosol degree of oxygenation. An Aerodyne high-resolution time-of-flight aerosol mass spectrometer is used to compare mass spectra from α-pinene photooxidation with ambient aerosol. Composition is compared in terms of the fraction of particulate CO+2 , a surrogate ...
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