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This paper discusses an experimental investigation of intermediates, product yields and the growth of aerosols during the oxidation of DMS initiated by NO(3) radicals. Two parallel studies were carried out. The first study involved a series of Teflon bag experiments where the formation of aerosols and SO(2) was followed experimentally and described by combining a chemical model and an aerosol physics model. The tuning of this combined model to fit the experimental data enabled the sticking probability of MSA (gas) on acidic particles to be evaluated and the importance of a stable peroxynitrate intermediate, found to be a precursor of MSA and H(2)SO(4), to be demonstrated. In the parallel study, the thermal stability of this intermediate was investigated in a laboratory chamber applying FTIR spectroscopy as the analytical technique.

Additional information

Authors: HJORTH J, JRC Ispra (IT);JENSEN N R, JRC Ispra (IT);RAES F, JRC Ispra (IT);VAN DINGENEN R, JRC Ispra (IT)
Bibliographic Reference: Paper presented: DMS : Oceans, Atmosphere and Climate, Belgirate (IT), October 14, 1992
Availability: Available from (1) as Paper EN 37208 ORA
Record Number: 199410221 / Last updated on: 1994-11-28
Original language: en
Available languages: en