Dissolved organic carbon in rainwater from areas heavily impacted by sugar cane burning

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dc.contributor.authorCoelho, C. H.
dc.contributor.authorFrancisco, J. G. [UNESP]
dc.contributor.authorNogueira, Raquel Fernandes Pupo [UNESP]
dc.contributor.authorCampos, M. L. A. M.
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T14:19:15Z
dc.date.available2014-05-20T14:19:15Z
dc.date.issued2008-09-01
dc.description.abstractThis work reports on rainwater dissolved organic carbon (DOC) from Ribeirao Preto (RP) and Araraquara over a period of 3 years. The economies of these two cities, located in São Paulo state (Brazil), are based on agriculture and related industries, and the region is strongly impacted by the burning of sugar cane foliage before harvesting. Highest DOC concentrations were obtained when air masses traversed sugar cane fields burned on the same day as the rain event. Significant increases in the DOC volume weighted means (VWM) during the harvest period, for both sites, and a good linear correlation (r=0.83) between DOC and K (a biomass burning marker) suggest that regional scale organic carbon emissions prevail over long-range transport. The DOC VWMs and standard deviations were 272 +/- 22 mu mol L-1 (n=193) and 338 +/- 40 mu mol L-1 (n=80) for RP and Araraquara, respectively, values which are at least two times higher than those reported for other regions influenced by biomass burning, such as the Amazon. These high DOC levels are discussed in terms of agricultural activities, particularly the large usage of biogenic fuels in Brazil, as well as the analytical method used in this work, which includes volatile organic carbon when reporting DOC values. Taking into account rainfall volume, estimated annual rainwater DOC fluxes for RP (4.8 g C m(-2) yr(-1)) and Araraquara (5.4 g C m(-2) yr(-1)) were close to that previously found for the Amazon region (4.8 g C m(-2) yr(-1)). This work also discusses whether previous calculations of the global rainwater carbon flux may have been underestimated, since they did not consider large inputs from biomass combustion sources, and suffered from a possible analytical bias. (c) 2008 Elsevier Ltd. All rights reserved.en
dc.description.affiliationUniv São Paulo, Dept Quim, Fac Filosofia Ciencias & Letras Ribeirao Preto, BR-14040901 Ribeirao Preto, SP, Brazil
dc.description.affiliationUNESP Univ Estadual Paulista, Inst Quim, BR-14800900 Araraquara, SP, Brazil
dc.description.affiliationUnespUNESP Univ Estadual Paulista, Inst Quim, BR-14800900 Araraquara, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIdFAPESP: 03/01532-4
dc.format.extent7115-7121
dc.identifierhttp://dx.doi.org/10.1016/j.atmosenv.2008.05.072
dc.identifier.citationAtmospheric Environment. Oxford: Pergamon-Elsevier B.V. Ltd, v. 42, n. 30, p. 7115-7121, 2008.
dc.identifier.doi10.1016/j.atmosenv.2008.05.072
dc.identifier.issn1352-2310
dc.identifier.lattes6887310539435086
dc.identifier.orcid0000-0003-1237-4571
dc.identifier.urihttp://hdl.handle.net/11449/25804
dc.identifier.wosWOS:000260265300011
dc.language.isoeng
dc.publisherPergamon-Elsevier B.V. Ltd
dc.relation.ispartofAtmospheric Environment
dc.relation.ispartofjcr3.708
dc.relation.ispartofsjr1,523
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectBrazilen
dc.subjectWet depositionen
dc.subjectCarbon fluxen
dc.subjectVolatile organic carbonen
dc.subjectGlobal carbon budgeten
dc.titleDissolved organic carbon in rainwater from areas heavily impacted by sugar cane burningen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderPergamon-Elsevier B.V. Ltd
unesp.author.lattes6887310539435086[3]
unesp.author.orcid0000-0003-1237-4571[3]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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