Modelling atmospheric OH-reactivity in a boreal forest ecosystem

Publication: Research - peer-reviewJournal article – Annual report year: 2011

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  • Author: Mogensen, D.

    Univ Helsinki, Helsinki Univ Ctr Environm (FI)

  • Author: Smolander, S.

    Univ Helsinki, Dept Phys, Div Atmospher Sci (FI)

  • Author: Sogachev, Andrey

    Meteorology, Wind Energy Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark, Denmark

  • Author: Zhou, L.

    Univ Helsinki, Dept Phys, Div Atmospher Sci (FI)

  • Author: Sinha, V.

    Indian Inst Sci Educ & Res IISER Mohali (IN)

  • Author: Guenther, A.

    Natl Ctr Atmospher Res (US)

  • Author: Williams, J.

    Max Planck Institute

  • Author: Nieminen, T.

    Univ Helsinki, Dept Phys, Div Atmospher Sci (FI)

  • Author: Kajos, M. K.

    Univ Helsinki, Dept Phys, Div Atmospher Sci (FI)

  • Author: Rinne, J.

    Univ Helsinki, Dept Phys, Div Atmospher Sci (FI)

  • Author: Kulmala, M.

    Univ Helsinki, Dept Phys, Div Atmospher Sci (FI)

  • Author: Boy, M.

    Univ Helsinki, Dept Phys, Div Atmospher Sci (FI)

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We have modelled the total atmospheric OH-reactivity in a boreal forest and investigated the individual contributions from gas phase inorganic species, isoprene, monoterpenes, and methane along with other important VOCs. Daily and seasonal variation in OH-reactivity for the year 2008 was examined as well as the vertical OH-reactivity profile. We have used SOSA; a one dimensional vertical chemistry-transport model (Boy et al., 2011a) together with measurements from Hyytiala, SMEAR II station, Southern Finland, conducted in August 2008. Model simulations only account for similar to 30-50% of the total measured OH sink, and in our opinion, the reason for missing OH-reactivity is due to unmeasured unknown BVOCs, and limitations in our knowledge of atmospheric chemistry including uncertainties in rate constants. Furthermore, we found that the OH-reactivity correlates with both organic and inorganic compounds and increases during summer. The summertime canopy level OH-reactivity peaks during night and the vertical OH-reactivity decreases with height.
Original languageEnglish
JournalAtmospheric Chemistry and Physics
Publication date2011
Volume11
Issue18
Pages9709-9719
ISSN1680-7316
DOIs
StatePublished

Bibliographical note

This work is distributed under the Creative Commons Attribution 3.0 License.

CitationsWeb of Science® Times Cited: 15

Keywords

  • Environment and climate
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