Seasonal changes in isoprene emission and deposition in central Amazonia

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dc.contributor.authorALVES, ELIANE G.
dc.contributor.authorTOTA, JULIO
dc.contributor.authorTURNIPSEED, ANDREW
dc.contributor.authorVEGA BUSTILLOS, JOSE O.W.
dc.contributor.authorSANTANA, RAONI A.
dc.contributor.authorLOPES, PAULA R.C.
dc.contributor.authorCIRINO, GLAUBER G.
dc.contributor.authorTAVARES, JULIA V.
dc.contributor.authorLOPES, ALINE
dc.contributor.authorNELSON, BRUCE
dc.contributor.authorROSA, DIOGO
dc.contributor.authorVALE, DALTON
dc.contributor.authorSOUZA, RODRIGO de
dc.contributor.authorGU, DASA
dc.contributor.authorSTAVRAKOU, TRISSEVGENI
dc.contributor.authorADAMS, DAVID
dc.contributor.authorWU, JIN
dc.contributor.authorSALESKA, SCOTT
dc.contributor.authorDIAS-JUNIOR, CLEO
dc.contributor.authorYANEZ-SERRANO, ANA M.
dc.contributor.authorKESSELMEIER, JURGEN
dc.contributor.authorKARL, THOMAS
dc.contributor.authorMANZI, ANTONIO
dc.contributor.authorGUENTHER, ALEX
dc.coverageInternacionalpt_BR
dc.creator.eventoILEAPS SCIENCE CONFERENCE, 5thpt_BR
dc.date.accessioned2018-09-24T18:19:35Z
dc.date.available2018-09-24T18:19:35Z
dc.date.eventoSeptember 11-14, 2017pt_BR
dc.description.abstractIsoprene fluxes vary seasonally with changes in environmental factors as light and temperature, and biological factors as leaf phenology. But, our understanding of isoprene seasonal dependency to these factors is still limited in Amazonia. It has been indicated that the dry season shows higher emissions than the wet season, because there is more light available and higher temperature. Also, leaf phenology was recently suggested to drive ecosystem isoprene emissions, but local seasonal observations were scarce or not available. Here, we present canopy isoprene flux measured in two sites of primary rainforest in central Amazonia and compare to changes in light, temperature, and leaf phenology. The highest emissions were during the dry and dry-to-wet transition seasons, and the wet and the wet-to dry transition seasons revealed net deposition for one site. Leaf phenology, referred as changes in observed mature Leaf Area Index, was the most correlated factor and explained up to 59% of seasonal isoprene emissions. Attempting to represent this with modeling, the MEGAN 2.1 leaf age algorithm was driven by inputs resulted from a leaf demography64 ontogeny model that uses leaf flushing observed in the fields. However, model emissions were overestimated and did not capture the seasonal behavior observed. Using the leaf phenology from the field as inputs for the leaf age algorithm of MEGAN 2.1, improved estimates of the proportion of leaves in different leaf age categories for each site, but did not change the relative isoprene emission capacity used for each age class. This study hightlights the importance of accounting for differential isoprene emission capacity across canopy leaf age classes and of identifying the forest adaptive mechanisms that underly seasonal variation of emission, and potentially deposition, of isoprene in Amazonia.pt_BR
dc.identifier.citationALVES, ELIANE G.; TOTA, JULIO; TURNIPSEED, ANDREW; VEGA BUSTILLOS, JOSE O.W.; SANTANA, RAONI A.; LOPES, PAULA R.C.; CIRINO, GLAUBER G.; TAVARES, JULIA V.; LOPES, ALINE; NELSON, BRUCE; ROSA, DIOGO; VALE, DALTON; SOUZA, RODRIGO de; GU, DASA; STAVRAKOU, TRISSEVGENI; ADAMS, DAVID; WU, JIN; SALESKA, SCOTT; DIAS-JUNIOR, CLEO; YANEZ-SERRANO, ANA M.; KESSELMEIER, JURGEN; KARL, THOMAS; MANZI, ANTONIO; GUENTHER, ALEX. Seasonal changes in isoprene emission and deposition in central Amazonia. In: ILEAPS SCIENCE CONFERENCE, 5th, September 11-14, 2017, Oxford, UK. <b>Proceedings...</b> Disponível em: http://repositorio.ipen.br/handle/123456789/29201.
dc.identifier.orcidhttps://orcid.org/0000-0002-4712-4057
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/29201
dc.local.eventoOxford, UKpt_BR
dc.rightsopenAccesspt_BR
dc.subjectisoprene
dc.subjectemission
dc.subjectforests
dc.subjectvolatile matter
dc.subjectorganic compounds
dc.subjectseasonal variations
dc.subjectclimate models
dc.subjectclimatic change
dc.subjectamazon river
dc.titleSeasonal changes in isoprene emission and deposition in central Amazoniapt_BR
dc.typeTexto completo de eventopt_BR
dspace.entity.typePublication
ipen.autorPAULA REGINA CORAIN LOPES
ipen.autorJOSE OSCAR WILLIAM VEGA BUSTILLOS
ipen.codigoautor3156
ipen.codigoautor82
ipen.contributor.ipenauthorPAULA REGINA CORAIN LOPES
ipen.contributor.ipenauthorJOSE OSCAR WILLIAM VEGA BUSTILLOS
ipen.date.recebimento18-09pt_BR
ipen.event.datapadronizada2017pt_BR
ipen.identifier.ipendoc24950pt_BR
ipen.notas.internasProceedingspt_BR
ipen.type.genreArtigo
relation.isAuthorOfPublication6f214edf-4295-4ba4-b809-a377567817c4
relation.isAuthorOfPublicationfca54715-9422-40f4-97aa-f96c174fae47
relation.isAuthorOfPublication.latestForDiscoveryfca54715-9422-40f4-97aa-f96c174fae47
sigepi.autor.atividadeVEGA BUSTILLOS, JOSE O.W.:82:520:Npt_BR
sigepi.autor.atividadeLOPES, PAULA R.C.:3156:-1:Npt_BR
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