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Luo, X.S., A.H. Tang, K. Shi, L.H. Wu, W.Q. Li, W.Q. Shi, X.K. Shi, J.W. Erisman, F.S. Zhang and X.J. Liu. 2014. Chinese coastal seas are facing heavy atmospheric nitrogen deposition. Environmental Research Letters. 9(9).

Number of pages: 10

DOI: 10.1088/1748-9326/9/9/095007

Type of document: Journal Article

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More information on authors/freelancers connected to LBI :
Prof J. W. Erisman, PhD

Language of document: English

Title in English: Chinese coastal seas are facing heavy atmospheric nitrogen deposition

Abstract / summary in English:

As the amount of reactive nitrogen (N) generated and emitted increases the amount of N deposition and its contribution to eutrophication or harmful algal blooms in the coastal zones are becoming issues of environmental concern. To quantify N deposition in coastal seas of China we selected six typical coastal sites from North to South in 2011. Concentrations of NH3, HNO3, NO2, particulate NH4+ (pNH4+) and pNO3 ranged from 1.97– 4.88, 0.46 –1.22, 3.03 –7.09,2.24 – 4.90 and 1.13–2.63 μgNm−3 at Dalian (DL), Changdao (CD), Linshandao (LS), Fenghua (FH), Fuzhou (FZ), and Zhanjiang (ZJ) sites, respectively. Volume-weighted NO3–N and NH4+–N concentrations in precipitation varied from 0.46 to 1.67 and 0.47 to 1.31 mg N L−1 at the six sites. Dry, wet and total deposition rates of N were 7.8–23.1, 14.2–25.2 and 22.0 – 44.6 kg N ha−1 yr−1 across the six coastal sites. Average N dry deposition accounted for 45.4% of the total deposition and NH3 and pNH4 + contributed to 76.6% of the dry deposition. If we extrapolate our total N deposition of 33.9 kg N ha−1 yr−1 to the whole Chinese coastal sea area (0.40 million km2), total N deposition amounts to 1.36 Tg N yr−1, a large external N input to surrounding marine ecosystems.

Keywords in English: reactive N, atmospheric deposition, coastal sea, eutrophication, China
Chinese coastal seas are facing heavy atmospheric nitrogen deposition