DOI: 10.1016/j.atmosenv.2020.117502
论文题名: Atmospheric concentrations and dry deposition of reactive nitrogen in the state of São Paulo, Brazil
作者: 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.
刊名: Atmospheric Environment
ISSN: 1352-2310
出版年: 2020
卷: 230 语种: 英语
学科: Dry deposition
; Nitrogen emission
; Particulate matter
; Reactive nitrogen
中文摘要: 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 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160355
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
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]. Atmospheric Environment,2020-01-01,230