Atmospheric concentrations and dry deposition of reactive nitrogen in the state of São Paulo, Brazil

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dc.contributor.authorSouza, Mariana de Almeida [UNESP]
dc.contributor.authorPacheco, Felipe Siqueira
dc.contributor.authorPalandi, Jalusa Aparecida de Leo
dc.contributor.authorForti, Maria Cristina
dc.contributor.authorCampos, Maria Lucia A.M.
dc.contributor.authorOmetto, Jean Pierre H.B.
dc.contributor.authorReis, Dayane Cristina Oliveira
dc.contributor.authorde Carvalho Junior, João Andrade [UNESP]
dc.contributor.institutionCCST/INPE
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2020-12-12T01:20:58Z
dc.date.available2020-12-12T01:20:58Z
dc.date.issued2020-06-01
dc.description.abstractEstimates of nitrogen deposition play a key role in better understanding the human impacts on the nitrogen biogeochemical cycle. This paper examines the concentration of reactive nitrogen (Nr) in the atmosphere and the average dry deposition in the state of São Paulo, Brazil. The Nr species that were measured were in the gaseous (NO2, NH3 and HNO3) and particulate phases (NH4+, NO3−). Denuder-based samplers were spatially distributed in six sites to account for different types of land cover and urbanization. Samples were collected over 2 years (2015–2017). The dominant form of inorganic Nr in the atmosphere was the gaseous NO2 at all sampling sites, which represented 79% of the total. The average concentrations of NH3, HNO3, NH4+ and NO3− were 10%, 3%, 6% and 2% of the total Nr, respectively. The average Nr dry deposition in São Paulo State was 10.6 kg N ha−1 yr−1. The highest average deposition of Nr was found in the SP sampling site and is related to intense vehicular traffic, waste management and industrial activities. This work suggests that dry deposition of Nr into the Atlantic Forest next to São Paulo municipality can exceed the critical nitrogen load suggested for most forests. This implies that human activities in the surrounding areas may be affecting the integrity of one of the most important biodiversity hotspots in South America. These results will contribute to improve Nr budget estimates and to advance Nr deposition modelling approaches.en
dc.description.affiliationEarth System Science Center National Institute for Space Research CCST/INPE, Av. dos Astronautas 1758, Jardim da Granja
dc.description.affiliationUniversidade de São Paulo USP Departamento de Química, Av. dos Bandeirantes 3900, Monte Alegre
dc.description.affiliationUniversidade Estadual Paulista UNESP, Av. Dr. Ariberto Pereira da Cunha 333, Pedregulho
dc.description.affiliationUnespUniversidade Estadual Paulista UNESP, Av. Dr. Ariberto Pereira da Cunha 333, Pedregulho
dc.description.sponsorshipInter-American Institute for Global Change Research
dc.description.sponsorshipIsrael Aerospace Industries
dc.description.sponsorshipIdIsrael Aerospace Industries: CRN3005
dc.identifierhttp://dx.doi.org/10.1016/j.atmosenv.2020.117502
dc.identifier.citationAtmospheric Environment, v. 230.
dc.identifier.doi10.1016/j.atmosenv.2020.117502
dc.identifier.issn1873-2844
dc.identifier.issn1352-2310
dc.identifier.scopus2-s2.0-85083449676
dc.identifier.urihttp://hdl.handle.net/11449/198746
dc.language.isoeng
dc.relation.ispartofAtmospheric Environment
dc.sourceScopus
dc.subjectDry deposition
dc.subjectNitrogen emission
dc.subjectParticulate matter
dc.subjectReactive nitrogen
dc.titleAtmospheric concentrations and dry deposition of reactive nitrogen in the state of São Paulo, Brazilen
dc.typeArtigo

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