TY  - JOUR
AU  - Anttila, T.
AU  - Kerminen, V.-M.
AU  - Kulmala, M.
AU  - Laaksonen, A.
AU  - O'Dowd, C.
TI  - Modelling the formation of organic particles in the atmosphere
JO  - Atmospheric chemistry and physics
VL  - 4
SN  - 1680-7316
CY  - Katlenburg-Lindau
PB  - EGU
M1  - PreJuSER-42749
SP  - 1071 - 1083
PY  - 2004
N1  - Record converted from VDB: 12.11.2012
AB  - 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.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000222473800003
UR  - https://juser.fz-juelich.de/record/42749
ER  -