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Nitrogen deposition in precipitation to a monsoon-affected eutrophic embayment: Fluxes, sources, and processes
Wu, YC; Zhang, JP; Liu, SL; Jiang, ZJ; Arbi, I; Huang, XP; Macreadie, PI; zhangjingping@scsio.ac.cn; xphuang@scsio.ac.cn
2018
Source PublicationATMOSPHERIC ENVIRONMENT
Volume182Pages:75-86
AbstractDaya Bay in the South China Sea (SCS) has experienced rapid nitrogen pollution and intensified eutrophication in the past decade due to economic development. Here, we estimated the deposition fluxes of nitrogenous species, clarified the contribution of nitrogen from precipitation and measured ions and isotopic composition (delta N-15 and delta O-18) of nitrate in precipitation in one year period to trace its sources and formation processes among different seasons. We found that the deposition fluxes of total dissolved nitrogen (TDN), NO3-, NH4+, NO2-, and dissolved organic nitrogen (DON) to Daya Bay were 132.5, 64.4 17.5, 1.0, 49.6 mmol m(-2.)yr(-1), respectively. DON was a significant contributor to nitrogen deposition (37% of TDN), and NO3- accounted for 78% of the DIN in precipitation. The nitrogen deposition fluxes were higher in spring and summer, and lower in winter. Nitrogen from precipitation contributed nearly 38% of the total input of nitrogen (point sources input and dry and wet deposition) in Daya Bay. The delta N-15-NO3- abundance, ion compositions, and air mass backward trajectories implicated that coal combustion, vehicle exhausts, and dust from mainland China delivered by northeast monsoon were the main sources in winter, while fossil fuel combustion (coal combustion and vehicle exhausts) and dust from PRD and southeast Asia transported by southwest monsoon were the main sources in spring; marine sources, vehicle exhausts and lightning could be the potential sources in summer. delta O-18 results showed that OH pathway was dominant in the chemical formation process of nitrate in summer, while N2O5 + DMS/HC pathways in winter and spring.
Department[Wu, Yunchao; Zhang, Jingping; Liu, Songlin; Jiang, Zhijian; Arbi, Iman; Huang, Xiaoping] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Trop Marine Bioresources & Ecol, Guangzhou 510301, Guangdong, Peoples R China; [Wu, Yunchao; Arbi, Iman; Huang, Xiaoping] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Macreadie, Peter Ian] Deakin Univ, Fac Sci Engn & Built Environm, Sch Life & Environm Sci, Blue Carbon Lab,Ctr Integrat Ecol, Burwood, Vic 3125, Australia
Subject AreaEnvironmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS KeywordNitrogen deposition ; Air pollution ; Sources ; Isotopic composition ; Daya bay
Funding ProjectLMB
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/16938
Collection中科院海洋生物资源可持续利用重点实验室
Corresponding Authorzhangjingping@scsio.ac.cn; xphuang@scsio.ac.cn
Recommended Citation
GB/T 7714
Wu, YC,Zhang, JP,Liu, SL,et al. Nitrogen deposition in precipitation to a monsoon-affected eutrophic embayment: Fluxes, sources, and processes[J]. ATMOSPHERIC ENVIRONMENT,2018,182:75-86.
APA Wu, YC.,Zhang, JP.,Liu, SL.,Jiang, ZJ.,Arbi, I.,...&xphuang@scsio.ac.cn.(2018).Nitrogen deposition in precipitation to a monsoon-affected eutrophic embayment: Fluxes, sources, and processes.ATMOSPHERIC ENVIRONMENT,182,75-86.
MLA Wu, YC,et al."Nitrogen deposition in precipitation to a monsoon-affected eutrophic embayment: Fluxes, sources, and processes".ATMOSPHERIC ENVIRONMENT 182(2018):75-86.
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