Who controls the monthly variations of NH4+ nitrogen isotope composition in precipitation?

	Who controls the monthly variations of NH4+ nitrogen isotope composition in precipitation?
	Hong-Wei Xiao; Hua-Yun Xiao; Ai-min Long; Yan-Li Wang
通讯作者	Hua-Yun Xiao
	2012
发表期刊	Atmospheric Environment
卷号	54 期号:2 页码:201-206
摘要	Nitrogen isotopes of ammonium (delta N-15-NH4+) in precipitation have been analyzed, to study their monthly from Oct. 2008 to Sep. 2009 at Guiyang, Southwest China. delta N-15-NH4+ values were higher in and lower in summer showing a strong sine curve. In summer (rainy season), raindrop may more light ammonia by washout process, because raindrop incorporated (NH3)-N-15 preferentially left the N-14 in the atmosphere. At the same time, longer sunshine times imply more hv for H2SO4 of SO2 to H2SO4, which accelerates gaseous to particle conversion of NH3 to (NH4)(2)SO4 unidirectional reactions for isotopic enriched N-14. The above two aspects can somewhat cause the variation of nitrogen isotopic composition, but are not the main or direct reasons. The has an opposite trend with seasonal variation of delta N-15 values. The temperature not only seasonal variation of delta N-15 values, but also increases the volatilization rate of NH3 and microbial And there is a robust linear relationship between temperature and delta N-15, showing that the is the main factor to decide the monthly variation of delta N-15-NH4+. (C) 2012 Elsevier Ltd. All rights reserved. constituents' enrichment, so it is helpful for enrichment of metallogenetic elements and plays an important role in the formation of porphyry Au-Cu deposits in this region.
关键词	Ammonium Δ15n Isotopic Fractionation Unidirectional Reaction Exchange Reaction Seasonal Variation
学科领域	环境地球化学
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/4822
专题	环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文
通讯作者	Hua-Yun Xiao
推荐引用方式 GB/T 7714	Hong-Wei Xiao,Hua-Yun Xiao,Ai-min Long,et al. Who controls the monthly variations of NH4+ nitrogen isotope composition in precipitation?[J]. Atmospheric Environment,2012,54(2):201-206.
APA	Hong-Wei Xiao,Hua-Yun Xiao,Ai-min Long,&Yan-Li Wang.(2012).Who controls the monthly variations of NH4+ nitrogen isotope composition in precipitation?.Atmospheric Environment,54(2),201-206.
MLA	Hong-Wei Xiao,et al."Who controls the monthly variations of NH4+ nitrogen isotope composition in precipitation?".Atmospheric Environment 54.2(2012):201-206.

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