Minor contributions of daytime monoterpenes are major contributors to atmospheric reactivity

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dc.contributor.authorMcGlynn, Deborah F.en
dc.contributor.authorFrazier, Grahamen
dc.contributor.authorBarry, Laura E. R.en
dc.contributor.authorLerdau, Manuel T.en
dc.contributor.authorPusede, Sally E.en
dc.contributor.authorIsaacman-VanWertz, Gabrielen
dc.date.accessioned2023-04-04T15:06:25Zen
dc.date.available2023-04-04T15:06:25Zen
dc.date.issued2023-01-04en
dc.description.abstractEmissions from natural sources are driven by various external stimuli such as sunlight, temperature, and soil moisture. Once biogenic volatile organic compounds (BVOCs) are emitted into the atmosphere, they rapidly react with atmospheric oxidants, which has significant impacts on ozone and aerosol budgets. However, diurnal, seasonal, and interannual variability in these species are poorly captured in emissions models due to a lack of long-term, chemically speciated measurements. Therefore, increasing the monitoring of these emissions will improve the modeling of ozone and secondary organic aerosol concentrations. Using 2 years of speciated hourly BVOC data collected at the Virginia Forest Research Lab (VFRL) in Fluvanna County, Virginia, USA, we examine how minor changes in the composition of monoterpenes between seasons are found to have profound impacts on ozone and OH reactivity. The concentrations of a range of BVOCs in the summer were found to have two different diurnal profiles, which, we demonstrate, appear to be driven by light-dependent versus light-independent emissions. Factor analysis was used to separate the two observed diurnal profiles and determine the contribution from each emission type. Highly reactive BVOCs were found to have a large influence on atmospheric reactivity in the summer, particularly during the daytime. These findings reveal the need to monitor species with high atmospheric reactivity, even though they have low concentrations, to more accurately capture their emission trends in models.en
dc.description.notesThis research has been funded by the National Science Foundation (grant nos.~AGS 1837882 and AGS 1837891). Tower maintenance and operation was supported in part by the Pace Endowment. Deborah~F.~McGlynn and Laura~E.~R.~Barry were supported in part by Virginia Space Grant Consortium Graduate Research Fellowships. The authors gratefully acknowledge the assistance of Koong~Yi and Bradley~Sutliff, for their support in the upkeep and maintenance of the instrument at Pace Tower.en
dc.description.sponsorshipNational Science Foundation [~AGS 1837882, AGS 1837891]; Pace Endowment; Virginia Space Grant Consortium Graduate Research Fellowshipsen
dc.description.versionPublished versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.5194/bg-20-45-2023en
dc.identifier.eissn1726-4189en
dc.identifier.issue1en
dc.identifier.urihttp://hdl.handle.net/10919/114247en
dc.identifier.volume20en
dc.language.isoenen
dc.publisherCopernicusen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectVolatile organic-compoundsen
dc.subjectgas-phase reactionsen
dc.subjectpositive matrix factorizationen
dc.subjectrate constantsen
dc.subjectde-novoen
dc.subjectemissionsen
dc.subjectisopreneen
dc.subjectlighten
dc.subjectsesquiterpenesen
dc.subjectohen
dc.titleMinor contributions of daytime monoterpenes are major contributors to atmospheric reactivityen
dc.title.serialBiogeosciencesen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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