Modelling atmospheric OH-reactivity in a boreal forest ecosystem

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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Author Mogensen, D.
Smolander, S.
Sogachev, A.
Zhou, L.
Sinha, V.
Guenther, Alex
Williams, J.
Nieminen, T.
Kajos, M.
Rinne, J.
Kulmala, M.
Boy, M.
Publisher UCAR/NCAR - Library
Publication Date 2011-09-20T00:00:00
Digital Object Identifier (DOI) Not Assigned
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Topic Category geoscientificInformation
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Metadata Date 2023-08-18T18:48:45.666313
Metadata Record Identifier edu.ucar.opensky::articles:12371
Metadata Language eng; USA
Suggested Citation Mogensen, D., Smolander, S., Sogachev, A., Zhou, L., Sinha, V., Guenther, Alex, Williams, J., Nieminen, T., Kajos, M., Rinne, J., Kulmala, M., Boy, M.. (2011). Modelling atmospheric OH-reactivity in a boreal forest ecosystem. UCAR/NCAR - Library. http://n2t.net/ark:/85065/d7pz59k7. Accessed 22 June 2025.

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