FORest Canopy Atmosphere Transfer (FORCAsT) 1.0: a 1-D model of biosphere–atmosphere chemical exchange

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dc.citation.firstpage3765en_US
dc.citation.issueNumber11en_US
dc.citation.journalTitleGeoscientific Model Developmenten_US
dc.citation.lastpage3784en_US
dc.citation.volumeNumber8en_US
dc.contributor.authorAshworth, K.en_US
dc.contributor.authorChung, S.H.en_US
dc.contributor.authorGriffin, R.J.en_US
dc.contributor.authorChen, J.en_US
dc.contributor.authorForkel, R.en_US
dc.contributor.authorBryan, A.M.en_US
dc.contributor.authorSteiner, A.L.en_US
dc.date.accessioned2016-04-04T18:26:23Zen_US
dc.date.available2016-04-04T18:26:23Zen_US
dc.date.issued2015en_US
dc.description.abstractBiosphere–atmosphere interactions play a critical role in governing atmospheric composition, mediating the concentrations of key species such as ozone and aerosol, thereby influencing air quality and climate. The exchange of reactive trace gases and their oxidation products (both gas and particle phase) is of particular importance in this process. The FORCAsT (FORest Canopy Atmosphere Transfer) 1-D model is developed to study the emission, deposition, chemistry and transport of volatile organic compounds (VOCs) and their oxidation products in the atmosphere within and above the forest canopy. We include an equilibrium partitioning scheme, making FORCAsT one of the few canopy models currently capable of simulating the formation of secondary organic aerosols (SOAs) from VOC oxidation in a forest environment. We evaluate the capability of FORCAsT to reproduce observed concentrations of key gas-phase species and report modeled SOA concentrations within and above a mixed forest at the University of Michigan Biological Station (UMBS) during the Community Atmosphere-Biosphere Interactions Experiment (CABINEX) field campaign in the summer of 2009. We examine the impact of two different gas-phase chemical mechanisms on modelled concentrations of short-lived primary emissions, such as isoprene and monoterpenes, and their oxidation products. While the two chemistry schemes perform similarly under high-NOx conditions, they diverge at the low levels of NOx at UMBS. We identify peroxy radical and alkyl nitrate chemistry as the key causes of the differences, highlighting the importance of this chemistry in understanding the fate of biogenic VOCs (bVOCs) for both the modelling and measurement communities.en_US
dc.identifier.citationAshworth, K., Chung, S.H., Griffin, R.J., et al.. "FORest Canopy Atmosphere Transfer (FORCAsT) 1.0: a 1-D model of biosphere–atmosphere chemical exchange." <i>Geoscientific Model Development,</i> 8, no. 11 (2015) European Geosciences Union: 3765-3784. http://dx.doi.org/10.5194/gmd-8-3765-2015.en_US
dc.identifier.doihttp://dx.doi.org/10.5194/gmd-8-3765-2015en_US
dc.identifier.urihttps://hdl.handle.net/1911/88833en_US
dc.language.isoengen_US
dc.publisherEuropean Geosciences Unionen_US
dc.rightsThis work is distributed under the Creative Commons Attribution 3.0 License.en_US
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/us/en_US
dc.titleFORest Canopy Atmosphere Transfer (FORCAsT) 1.0: a 1-D model of biosphere–atmosphere chemical exchangeen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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