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delta N-15-NH4+ variations of rainwater: Application of the Rayleigh model
Xiao, Hong-Wei; Xiao, Hua-Yun; Long, Ai-Min; Liu, Cong-Qiang;;
AbstractIt 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 mu g/m(3) and estimated isotopic composition was -16.8 +/- 4.9 parts per thousand in Guiyang. The study also showed that estimated enrichment factor was +10.4 +/- 43 parts per thousand, 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. (C) 2015 Elsevier B.V. All rights reserved.
Department[Xiao, Hong-Wei; Long, Ai-Min] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China; [Xiao, Hua-Yun; Liu, Cong-Qiang] Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550002, Peoples R China ; LTO
KeywordRayleigh Model Initial Concentration Enrichment Factor Initial Nitrogen Isotope Ammonia
Subject AreaMeteorology & Atmospheric Sciences
Document Type期刊论文
Recommended Citation
GB/T 7714
Xiao, Hong-Wei,Xiao, Hua-Yun,Long, Ai-Min,et al. delta N-15-NH4+ variations of rainwater: Application of the Rayleigh model[J]. ATMOSPHERIC RESEARCH,2015,157:49-55.
APA Xiao, Hong-Wei,Xiao, Hua-Yun,Long, Ai-Min,Liu, Cong-Qiang,,& N-15-NH4+ variations of rainwater: Application of the Rayleigh model.ATMOSPHERIC RESEARCH,157,49-55.
MLA Xiao, Hong-Wei,et al."delta N-15-NH4+ variations of rainwater: Application of the Rayleigh model".ATMOSPHERIC RESEARCH 157(2015):49-55.
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