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dc.contributor.authorBarkley, Michael P.
dc.contributor.authorPalmer, Paul I.
dc.contributor.authorGanzeveld, Laurens
dc.contributor.authorArneth, Almut
dc.contributor.authorHagberg, Daniel
dc.contributor.authorKarl, Thomas
dc.contributor.authorGuenther, Alex
dc.contributor.authorPaulot, Fabien
dc.contributor.authorWennberg, Paul O.
dc.contributor.authorMao, Jingqiu
dc.contributor.authorKurosu, Thomas P.
dc.contributor.authorChance, Kelly
dc.contributor.authorMüller, J.-F.
dc.contributor.authorDe Smedt, Isabelle
dc.contributor.authorVan Roozendael, Michel
dc.contributor.authorChen, Dan
dc.contributor.authorWang, Yuxuan
dc.contributor.authorYantosca, Robert M.
dc.date.accessioned2019-10-03T14:38:50Z
dc.date.issued2011
dc.identifier.citationBarkley, Michael P., Paul I. Palmer, Laurens Ganzeveld, Almut Arneth, Daniel Hagberg, Thomas Karl, Alex Guenther, et al. 2011. “Can a ‘state of the Art’ Chemistry Transport Model Simulate Amazonian Tropospheric Chemistry?” Journal of Geophysical Research 116 (D16). https://doi.org/10.1029/2011jd015893.
dc.identifier.issn0022-1406
dc.identifier.issn0148-0227
dc.identifier.issn1934-2098
dc.identifier.issn2156-2202
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:41461231*
dc.description.abstractWe present an evaluation of a nested high-resolution Goddard Earth Observing System (GEOS)-Chem chemistry transport model simulation of tropospheric chemistry over tropical South America. The model has been constrained with two isoprene emission inventories: (1) the canopy-scale Model of Emissions of Gases and Aerosols from Nature (MEGAN) and (2) a leaf-scale algorithm coupled to the Lund-Potsdam-Jena General Ecosystem Simulator (LPJ-GUESS) dynamic vegetation model, and the model has been run using two different chemical mechanisms that contain alternative treatments of isoprene photo-oxidation. Large differences of up to 100 Tg C yr (1) exist between the isoprene emissions predicted by each inventory, with MEGAN emissions generally higher. Based on our simulations we estimate that tropical South America (30-85 degrees W, 14 degrees N-25 degrees S) contributes about 15-35% of total global isoprene emissions. We have quantified the model sensitivity to changes in isoprene emissions, chemistry, boundary layer mixing, and soil NOx emissions using ground-based and airborne observations. We find GEOS-Chem has difficulty reproducing several observed chemical species; typically hydroxyl concentrations are underestimated, whilst mixing ratios of isoprene and its oxidation products are overestimated. The magnitude of model formaldehyde (HCHO) columns are most sensitive to the choice of chemical mechanism and isoprene emission inventory. We find GEOS-Chem exhibits a significant positive bias (10-100%) when compared with HCHO columns from the Scanning Imaging Absorption Spectrometer for Atmospheric Chartography (SCIAMACHY) and Ozone Monitoring Instrument (OMI) for the study year 2006. Simulations that use the more detailed chemical mechanism and/or lowest isoprene emissions provide the best agreement to the satellite data, since they result in lower-HCHO columns.
dc.language.isoen_US
dc.publisherAmerican Geophysical Union
dash.licenseLAA
dc.titleCan a 'state of the art' chemistry transport model simulate Amazonian tropospheric chemistry?
dc.typeJournal Article
dc.description.versionVersion of Record
dc.relation.journalJournal of Geophysical Research
dash.depositing.authorChance, Kelly V.::c1853969e866fbac514a5665de391746::600
dc.date.available2019-10-03T14:38:50Z
dash.workflow.comments1Science Serial ID 47167
dc.identifier.doi10.1029/2011JD015893
dash.source.volume116;D16


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