气候变化领域集成服务门户(CCPortal): Atmospheric concentrations and dry deposition of reactive nitrogen in the state of São Paulo, Brazil

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DOI	10.1016/j.atmosenv.2020.117502
	Atmospheric concentrations and dry deposition of reactive nitrogen in the state of São Paulo, Brazil
	Souza M.D.A.; Pacheco F.S.; Palandi J.A.D.L.; Forti M.C.; Campos M.L.A.M.; Ometto J.P.H.B.; Reis D.C.O.; de Carvalho Junior J.A.
发表日期	2020
ISSN	1352-2310
卷号	230
英文摘要	Estimates 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. © 2020 Elsevier Ltd
英文关键词	Dry deposition; Nitrogen emission; Particulate matter; Reactive nitrogen
语种	英语
来源期刊	Atmospheric Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/129518
作者单位	Earth System Science Center, National Institute for Space Research, CCST/INPE, Av. dos Astronautas 1758, Jardim da Granja, São José dos Campos, SP 12227-010, Brazil; Universidade de São Paulo, USP, Departamento de Química, Av. dos Bandeirantes 3900, Monte Alegre, Ribeirão Preto, SP 14040-901, Brazil; Universidade Estadual Paulista, UNESP, Av. Dr. Ariberto Pereira da Cunha 333, Pedregulho, Guaratinguetá, SP 12516-410, Brazil
推荐引用方式 GB/T 7714	Souza M.D.A.,Pacheco F.S.,Palandi J.A.D.L.,et al. Atmospheric concentrations and dry deposition of reactive nitrogen in the state of São Paulo, Brazil[J],2020,230.
APA	Souza M.D.A..,Pacheco F.S..,Palandi J.A.D.L..,Forti M.C..,Campos M.L.A.M..,...&de Carvalho Junior J.A..(2020).Atmospheric concentrations and dry deposition of reactive nitrogen in the state of São Paulo, Brazil.Atmospheric Environment,230.
MLA	Souza M.D.A.,et al."Atmospheric concentrations and dry deposition of reactive nitrogen in the state of São Paulo, Brazil".Atmospheric Environment 230(2020).