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| Titel |
Modelling atmospheric OH-reactivity in a boreal forest ecosystem |
| VerfasserIn |
D. Mogensen, S. Smolander, A. Sogachev, L. Zhou, V. Sinha, A. Guenther, J. Williams, T. Nieminen, M. K. Kajos, J. Rinne, M. Kulmala  , M. Boy |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 11, no. 18 ; Nr. 11, no. 18 (2011-09-20), S.9709-9719 |
| Datensatznummer |
250010090
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| Publikation (Nr.) |
 copernicus.org/acp-11-9709-2011.pdf |
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| Zusammenfassung |
| 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 Hyytiälä, SMEAR II station, Southern Finland,
conducted in August 2008. Model simulations only account for ~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. |
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