Atmospheric nitrogen deposition and its long-term dynamics in a southeast China coastal area

CORC > 厦门大学 > 海洋环境－已发表论文

	Atmospheric nitrogen deposition and its long-term dynamics in a southeast China coastal area
	Chen, N. W. ; Hong, H. S. ; Huang, Q. J. ; Wu, J. Z. ; Hong HS(洪华生)
刊名	http://dx.doi.org/10.1016/j.jenvman.2011.01.026
	2011-06
关键词	RIVER ESTUARY SEA WET PRECIPITATION NUTRIENTS NITRATE REGION SITES WATER ASIA
英文摘要	International Cooperation and Exchanges; NSFC [40810069004]; Bureau of Science and Technology of Xiamen City, P.R. China [3502Z20091005]; Measurements were conducted during 2004-2005 and 2009-2010 to characterize atmospheric nitrogen (N) deposition to the Jiulong River Estuary - Xiamen Bay area in southeast China. Isotopic analysis and long-term data (1990-2009) for inorganic N extracted from the national acid deposition dataset were used to determine the dominant source of atmospheric nitrate and N component dynamics. The results showed that the mean dissolved total N concentration in rain water for the three coastal area sites was 2.71 +/- 1.58 mg N L(-1) (n = 141) in 2004. The mean dissolved inorganic N at the Xiamen site was 1.62 +/- 1.19 mg N L(-1) (n = 46) in 2004-2005 and 1.56 +/- 1.39 mg N L(-1) (n = 36) in 2009-2010, although the difference is not significant, nitrate turnover dominates the N component in the latter period. Total deposition flux over Xiamen was 30 kg N ha(-1) yr(-1). of which dry and wet deposition contributed 16% and 84%, respectively. Nitrate in wet deposition with low isotopic value (between -3.05 and -7.48 parts per thousand) was likely to have mostly originated from combustion NO from vehicle exhausts. The inorganic N in acid deposition exhibited a significant increase (mainly for nitrate) since the mid-1990s, which is consistent with the increased gaseous concentrations of NO, and expanding number of automobiles in the coastal city (Xiamen). The time series of nitrate anions and ammonium cations as well as pH values during the period 1990-2009 reflected an increasing trend of N emission with potential implication for N-induced acidification. (C) 2011 Elsevier Ltd. All rights reserved.
语种	英语
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/60408]
专题	海洋环境－已发表论文
推荐引用方式 GB/T 7714	Chen, N. W.,Hong, H. S.,Huang, Q. J.,et al. Atmospheric nitrogen deposition and its long-term dynamics in a southeast China coastal area[J]. http://dx.doi.org/10.1016/j.jenvman.2011.01.026,2011.
APA	Chen, N. W.,Hong, H. S.,Huang, Q. J.,Wu, J. Z.,&洪华生.(2011).Atmospheric nitrogen deposition and its long-term dynamics in a southeast China coastal area.http://dx.doi.org/10.1016/j.jenvman.2011.01.026.
MLA	Chen, N. W.,et al."Atmospheric nitrogen deposition and its long-term dynamics in a southeast China coastal area".http://dx.doi.org/10.1016/j.jenvman.2011.01.026 (2011).