DOI: 10.1002/2015GL066438
论文题名: Nitrogen isotope exchange between NO and NO2 and its implications for δ15N variations in tropospheric NOx and atmospheric nitrate
作者: Walters W.W. ; Simonini D.S. ; Michalski G.
刊名: Geophysical Research Letters
ISSN: 0094-9501
EISSN: 1944-9232
出版年: 2016
卷: 43, 期: 1 起始页码: 440
结束页码: 448
语种: 英语
英文关键词: fractionation
; isotopes
; nitrate
; nitrogen
; NOx
Scopus关键词: Chemical reactions
; Fractionation
; Nitrates
; Nitric oxide
; Nitrogen
; Nitrogen oxides
; Atmospheric nitrates
; Exchange reaction
; Experimental errors
; Isotopic fractionations
; Nitrogen dioxides
; Nitrogen isotopes
; NOx
; Zero-point energies
; Isotopes
; error analysis
; isotopic composition
; isotopic fractionation
; nitrate
; nitric oxide
; nitrogen isotope
; nitrous oxide
; stable isotope
; troposphere
英文摘要: The nitrogen (N) isotope exchange between nitric oxide (NO) and nitrogen dioxide (NO2) has been previously suggested to influence N stable isotope compositions (δ15N) of these molecules. However, there is disagreement in the magnitude of the N isotopic fractionation (αNO2/NO) resulting from this exchange process between previous experimental and theoretical studies. To this end, we measured αNO2/NO associated with this exchange reaction at various temperatures. Our results indicate αNO2/NO to be 1.0403 ± 0.0015, 1.0356 ± 0.0015, and 1.0336 ± 0.0014 at 278 K, 297 K, and 310 K, respectively. These measured values are within experimental error of the values we calculated using a modified version of the Bigeleisen-Mayer equation corrected for accurate zero-point energies, indicating an agreement between experiment and theory. Modeling of this exchange reaction demonstrates that δ15N-NO2 may exhibit a diurnal and seasonal profile if N isotopic equilibrium is achieved. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84970910113&doi=10.1002%2f2015GL066438&partnerID=40&md5=44d14140c884b0f428c2e0b25526ad3c
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10464
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Earth, Atmospheric and Planetary Sciences, Purdue University, West Lafayette, IN, United States
Recommended Citation:
Walters W.W.,Simonini D.S.,Michalski G.. Nitrogen isotope exchange between NO and NO2 and its implications for δ15N variations in tropospheric NOx and atmospheric nitrate[J]. Geophysical Research Letters,2016-01-01,43(1).