globalchange  > 影响、适应和脆弱性
DOI: 10.1002/jgrd.50680
论文题名:
Spatial and diurnal variability in reactive nitrogen oxide chemistry as reflected in the isotopic composition of atmospheric nitrate: Results from the CalNex 2010 field study
作者: Vicars W.C.; Morin S.; Savarino J.; Wagner N.L.; Erbland J.; Vince E.; Martins J.M.F.; Lerner B.M.; Quinn P.K.; Coffman D.J.; Williams E.J.; Brown S.S.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期:18
起始页码: 10567
结束页码: 10588
语种: 英语
英文关键词: nitrogen cycle ; nocturnal tropospheric chemistry ; non-mass dependent fractionation ; ozone ; stable isotopes
Scopus关键词: Air quality ; Atmospheric composition ; Isotopes ; Nitrates ; Nitrogen ; Nitrogen oxides ; Ozone ; Air quality modeling ; Atmospheric lifetime ; Atmospheric nitrates ; Isotopic composition ; Nitrogen cycles ; Stable isotope ratios ; Stable isotopes ; Tropospheric chemistry ; Atmospheric chemistry ; air quality ; air sampling ; atmospheric chemistry ; coastal zone ; concentration (composition) ; diurnal variation ; isotopic composition ; nitrate ; nitrogen oxides ; numerical model ; California ; United States
英文摘要: Here we present measurements of the size-resolved concentration and isotopic composition of atmospheric nitrate (NO3-) collected during a cruise in coastal California. Significant differences in air mass origin and atmospheric chemistry were observed in the two main regions of this cruise (South and Central Coast) with corresponding differences in NO 3- concentration and isotope ratios. Measurements of the 17O-excess (Δ17O) of NO3- suggest that nocturnal chemistry played an important role in terms of total NO3- production (~ 50%) in the coastal Los Angeles region (South Coast), where NO3- concentrations were elevated due to the influence of sea breeze / land breeze recirculation and Δ17O(NO3-) averaged (25.3 ± 1.6)‰. Conversely, Δ17O(NO3-) averaged (22.3 ± 1.8)‰ in the Central Coast region, suggesting that the daytime OH + NO2 reaction was responsible for 60-85% of NO3- production in the marine air sampled in this area. A strong diurnal signal was observed for both the Δ17O and δ15N of NO3-. In the case of Δ17O, this trend is interpreted quantitatively in terms of the relative proportions of daytime and nighttime production and the atmospheric lifetime of NO3-. For δ15N, which had an average value of (0.0 ± 3.2)‰, the observed diurnality suggests a combined effect of isotopic exchange between gas-phase precursors and variability in reactive nitrogen sources. These findings represent a significant advance in our understanding of the isotope dynamics of nitrate and its precursor molecules, with potentially important implications for air quality modeling. Key Points Stable isotope ratios of atmospheric nitrate were measured in coastal CaliforniaOxygen isotopes are interpreted in terms of production mechanismsNitrogen isotopic composition reflects both sources and isotopic exchange ©2013. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63319
Appears in Collections:影响、适应和脆弱性
气候减缓与适应

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作者单位: LGGE, UMR 5183, UJF-Grenoble 1/CNRS, Grenoble, France; Institute of Alpine and Arctic Research, University of Colorado Boulder, 1560 30th St., Boulder, CO 80303, United States; Météo-France - CNRS, CNRM-GAME UMR 3589, CEN, Grenoble, France; NOAA Earth Systems Research Laboratory, Boulder, CO, United States; Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States; LTHE, UMR 5564, UJF-Grenoble 1/CNRS-INSU/G-INP/IRD, Grenoble, France; NOAA Pacific Marine Environmental Laboratory, Seattle, WA, United States

Recommended Citation:
Vicars W.C.,Morin S.,Savarino J.,et al. Spatial and diurnal variability in reactive nitrogen oxide chemistry as reflected in the isotopic composition of atmospheric nitrate: Results from the CalNex 2010 field study[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(18)
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