Particle concentration and flux dynamics in the atmospheric boundary layer as the indicator of formation mechanism

J. Lauros, Andrey Sogachev, S. Smolander, H. Vuollekoski, S.-L. Sihto, I. Mammarella, L. Laakso, Ü. Rannik, M. Boy

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    Abstract

    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 vertical profile of particle number distribution 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 biosphere. Simulation of aerosol concentration inside the atmospheric boundary layer during nucleation days shows highly dynamical picture, where particle formation is coupled with chemistry and turbulent transport. We have demonstrated suitability of our turbulent mixing scheme in reproducing most important characteristics of particle dynamics inside the atmospheric boundary layer. Deposition and particle flux simulations show that deposition affects noticeably only the smallest particles at the lowest part of the atmospheric boundary layer.
    Original languageEnglish
    JournalAtmospheric Chemistry and Physics Discussions
    Volume10
    Issue number8
    Pages (from-to)20005-20033
    ISSN1680-7367
    DOIs
    Publication statusPublished - 2010

    Keywords

    • Wind power meteorology
    • Wind Energy

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