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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Particle concentration and flux dynamics in the atmospheric boundary layer as the indicator of formation mechanism
Atmospheric Chemistry and Physics, Volume 11, No. 12, Year 2011
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Description
We carried out column model simulations to study particle fluxes and deposition and to evaluate different particle formation mechanisms at a boreal forest site in Finland. We show that kinetic nucleation of sulphuric acid cannot be responsible for new particle formation alone as the simulated vertical profile of particle number concentration does not correspond to observations. Instead organic induced nucleation leads to good agreement confirming the relevance of the aerosol formation mechanism including organic compounds emitted by sthe biosphere. The simulation of aerosol concentration within the atmospheric boundary layer during nucleation event days shows a highly dynamical picture, where particle formation is coupled with chemistry and turbulent transport. We have demonstrated the suitability of our turbulent mixing scheme in reproducing the most important characteristics of particle dynamics within the boundary layer. Deposition and particle flux simulations show that deposition affects noticeably only the smallest particles in the lowest part of the atmospheric boundary layer. © 2011 Author(s).
Authors & Co-Authors
Lauros, J.
Finland, Helsinki
Helsingin Yliopisto
Sogachev, Andrey F.
Denmark, Lyngby
Technical University of Denmark
Smolander, S.
Finland, Helsinki
Helsingin Yliopisto
Vuollekoski, Henri
Finland, Helsinki
Helsingin Yliopisto
Sihto, S. L.
Finland, Helsinki
Helsingin Yliopisto
Mammarella, I.
Finland, Helsinki
Helsingin Yliopisto
Laakso, Lauri
Finland, Helsinki
Helsingin Yliopisto
Finland, Helsinki
Finnish Meteorological Institute
South Africa, Potchefstroom
North-west University
Rannik, Üllar
Finland, Helsinki
Helsingin Yliopisto
Boy, Michael
Finland, Helsinki
Helsingin Yliopisto
Statistics
Citations: 28
Authors: 9
Affiliations: 4
Identifiers
Doi:
10.5194/acp-11-5591-2011
ISSN:
16807316
e-ISSN:
16807324