Diurnal variations in oxygen and nitrogen isotopes of atmospheric nitrogen dioxide and nitrate: implications for tracing NOx oxidation pathways and emission sources - INSU - Institut national des sciences de l'Univers Access content directly
Journal Articles Atmospheric Chemistry and Physics Year : 2024

Diurnal variations in oxygen and nitrogen isotopes of atmospheric nitrogen dioxide and nitrate: implications for tracing NOx oxidation pathways and emission sources

Abstract

The oxygen (∆17O) and nitrogen (∂15) isotopic compositions of atmospheric nitrate (NO3) are widely used as tracers of its formation pathways, precursor (nitrogen oxides NOx = nitric oxide NO + nitrogen NO2) emission sources, and physico-chemical processing. However, the critical lack of observations on the multi-isotopic composition of NO2 maintains significant uncertainties regarding the links between the isotopic composition of NOx and NO3−, which may bias estimates of the NO3− formation processes and the distribution of sources. We report here on the first simultaneous atmospheric observations of ∆17O and ∂15 in NO2 and NO3.
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insu-04095457 , version 1 (11-05-2023)
insu-04095457 , version 2 (31-01-2024)

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Sarah Albertin, Joël Savarino, Slimane Bekki, Albane Barbero, Roberto Grilli, et al.. Diurnal variations in oxygen and nitrogen isotopes of atmospheric nitrogen dioxide and nitrate: implications for tracing NOx oxidation pathways and emission sources. Atmospheric Chemistry and Physics, 2024, 24 (2), pp.1361-1388. ⟨10.5194/acp-24-1361-2024⟩. ⟨insu-04095457v2⟩
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