%0 Journal Article
%A Anttila, T.
%A Kerminen, V.-M.
%A Kulmala, M.
%A Laaksonen, A.
%A O'Dowd, C.
%T Modelling the formation of organic particles in the atmosphere
%J Atmospheric chemistry and physics
%V 4
%@ 1680-7316
%C Katlenburg-Lindau
%I EGU
%M PreJuSER-42749
%P 1071 - 1083
%D 2004
%Z Record converted from VDB: 12.11.2012
%X Particle formation resulting from activation of inorganic stable clusters by a supersaturated organic vapour was investigated using a numerical model. The applied aerosol dynamic model included a detailed description of the activation process along with a treatment of the appropriate aerosol and gas-phase processes. The obtained results suggest that both gaseous sulphuric acid and organic vapours contribute to organic particle formation in continental background areas. The initial growth of freshly-nucleated clusters is driven mainly by condensation of gaseous sulphuric acid and by a lesser extent self-coagulation. After the clusters have reached sizes of around 2 nm in diameter, low-volatile organic vapours start to condense spontaneously into the clusters, thereby accelerating their growth to detectable sizes. A shortage of gaseous sulphuric acid or organic vapours limit, or suppress altogether, the particle formation, since freshly-nucleated clusters are rapidly coagulated away by pre-existing particles. The obtained modelling results were applied to explaining the observed seasonal cycle in the number of aerosol formation events in a continental forest site.
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000222473800003
%U https://juser.fz-juelich.de/record/42749