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δ15N–NH4+ variations of rainwater: Application of the Rayleigh model
Hong-Wei Xiao;  Hua-Yun Xiao;  Ai-Min Long;  Cong-Qiang Liu
Source PublicationAtmospheric Research

It is generally difficult to measure atmospheric gaseous ammonia concentration and to identify its sources by isotopic technique due to the isotopic fractionation after it enters the atmosphere. In this study, Rayleigh model was successfully used to quantify atmospheric concentration and isotopic composition of gaseous ammonia based on sampling of 20 rain events from October 1st, 2008 to September 30, 2009 in Guiyang, southwest China. The estimated gaseous ammonia concentration was 25.7 ± 36.3 μg/m3 and estimated isotopic composition was − 16.8 ± 4.9‰ in Guiyang. The study also showed that estimated enrichment factor was + 10.4 ± 4.3‰, inferring that large nitrogen isotopic fractionation occurred during exchange reactions in most of the rain events. The atmospheric ammonium deposition was further estimated to be 38.1 kg/ha/year. However, there is no validation for the approach from an actual gas phase NH3 measurement to examine the model in this study.

KeywordRayleigh Model Initial Concentration Enrichment Factor Initial Nitrogen Isotope Ammonia
Indexed BySCI
Document Type期刊论文
Affiliation1.State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
2.State Key Laboratory of Environment Geochemistry, Institute of Geochemistry, Chinese Academy of Science, Guiyang 550002, China
Recommended Citation
GB/T 7714
Hong-Wei Xiao;Hua-Yun Xiao;Ai-Min Long;Cong-Qiang Liu. δ15N–NH4+ variations of rainwater: Application of the Rayleigh model[J]. Atmospheric Research,2015,157:49-55.
APA Hong-Wei Xiao;Hua-Yun Xiao;Ai-Min Long;Cong-Qiang Liu.(2015).δ15N–NH4+ variations of rainwater: Application of the Rayleigh model.Atmospheric Research,157,49-55.
MLA Hong-Wei Xiao;Hua-Yun Xiao;Ai-Min Long;Cong-Qiang Liu."δ15N–NH4+ variations of rainwater: Application of the Rayleigh model".Atmospheric Research 157(2015):49-55.
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