PTR-TOF-MS eddy covariance measurements of isoprene and monoterpene fluxes from an eastern Amazonian rainforest

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dc.contributor.authorSARKAR, CHINMOYpt_BR
dc.contributor.authorGUENTHER, ALEX B.pt_BR
dc.contributor.authorPARK, JEONG-HOOpt_BR
dc.contributor.authorSECO, ROGERpt_BR
dc.contributor.authorALVES, ELIANEpt_BR
dc.contributor.authorBATALHA, SARAHpt_BR
dc.contributor.authorSANTANA, RAONIpt_BR
dc.contributor.authorKIM, SAEWUNGpt_BR
dc.contributor.authorSMITH, JAMESpt_BR
dc.contributor.authorTOTA, JULIOpt_BR
dc.contributor.authorVEGA, OSCARpt_BR
dc.coverageInternacionalpt_BR
dc.date.accessioned2020-10-22T19:23:48Z
dc.date.available2020-10-22T19:23:48Z
dc.date.issued2020pt_BR
dc.description.abstractBiogenic volatile organic compounds (BVOCs) are important components of the atmosphere due to their contribution to atmospheric chemistry and biogeochemical cycles. Tropical forests are the largest source of the dominant BVOC emissions (e.g. isoprene and monoterpenes). In this study, we report isoprene and total monoterpene flux measurements with a proton transfer reaction time-of-flight mass spectrometer (PTR-TOF-MS) using the eddy covariance (EC) method at the Tapajós National Forest (2.857∘ S, 54.959∘ W), a primary rainforest in eastern Amazonia. Measurements were carried out from 1 to 16 June 2014, during the wet-to-dry transition season. During the measurement period, the measured daytime (06:00–18:00 LT) average isoprene mixing ratios and fluxes were 1.15±0.60 ppb and 0.55±0.71 mg C m−2 h−1, respectively, whereas the measured daytime average total monoterpene mixing ratios and fluxes were 0.14±0.10 ppb and 0.20±0.25 mg C m−2 h−1, respectively. Midday (10:00–14:00 LT) average isoprene and total monoterpene mixing ratios were 1.70±0.49 and 0.24±0.05 ppb, respectively, whereas midday average isoprene and monoterpene fluxes were 1.24±0.68 and 0.46±0.22 mg C m−2 h−1, respectively. Isoprene and total monoterpene emissions in Tapajós were correlated with ambient temperature and solar radiation. Significant correlation with sensible heat flux, SHF (r2=0.77), was also observed. Measured isoprene and monoterpene fluxes were strongly correlated with each other (r2=0.93). The MEGAN2.1 (Model of Emissions of Gases and Aerosols from Nature version 2.1) model could simulate most of the observed diurnal variations (r2=0.7 to 0.8) but declined a little later in the evening for both isoprene and total monoterpene fluxes. The results also demonstrate the importance of site-specific vegetation emission factors (EFs) for accurately simulating BVOC fluxes in regional and global BVOC emission models.pt_BR
dc.format.extent7179-7191pt_BR
dc.identifier.citationSARKAR, CHINMOY; GUENTHER, ALEX B.; PARK, JEONG-HOO; SECO, ROGER; ALVES, ELIANE; BATALHA, SARAH; SANTANA, RAONI; KIM, SAEWUNG; SMITH, JAMES; TOTA, JULIO; VEGA, OSCAR. PTR-TOF-MS eddy covariance measurements of isoprene and monoterpene fluxes from an eastern Amazonian rainforest. <b>Atmospheric Chemistry and Physics</b>, v. 20, n. 12, p. 7179-7191, 2020. DOI: <a href="https://dx.doi.org/10.5194/acp-20-7179-2020">10.5194/acp-20-7179-2020</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/31480.
dc.identifier.doi10.5194/acp-20-7179-2020pt_BR
dc.identifier.fasciculo12pt_BR
dc.identifier.issn1680-7316pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-4712-4057
dc.identifier.percentilfi87.19pt_BR
dc.identifier.percentilfiCiteScore97.00
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/31480
dc.identifier.vol20pt_BR
dc.relation.ispartofAtmospheric Chemistry and Physicspt_BR
dc.rightsopenAccesspt_BR
dc.subjectorganic compounds
dc.subjectvolatility
dc.subjectatmospheres
dc.subjectdata covariances
dc.subjectmeasuring instruments
dc.subjectatmospheric chemistry
dc.subjectlarge-eddy simulation
dc.subjectvolatile matter
dc.subjectamazon river
dc.titlePTR-TOF-MS eddy covariance measurements of isoprene and monoterpene fluxes from an eastern Amazonian rainforestpt_BR
dc.typeArtigo de periódicopt_BR
dspace.entity.typePublication
ipen.autorJOSE OSCAR WILLIAM VEGA BUSTILLOS
ipen.codigoautor82
ipen.contributor.ipenauthorJOSE OSCAR WILLIAM VEGA BUSTILLOS
ipen.date.recebimento20-10
ipen.identifier.fi6.133pt_BR
ipen.identifier.fiCiteScore10.1
ipen.identifier.ipendoc27254pt_BR
ipen.identifier.iwosWoSpt_BR
ipen.range.fi6.000 ou mais
ipen.range.percentilfi75.00 - 100.00
ipen.type.genreArtigo
relation.isAuthorOfPublicationfca54715-9422-40f4-97aa-f96c174fae47
relation.isAuthorOfPublication.latestForDiscoveryfca54715-9422-40f4-97aa-f96c174fae47
sigepi.autor.atividadeVEGA, OSCAR:82:520:Npt_BR
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