Atmospheric loss of nitrous oxide (N2O) is not influenced by its potential reactions with OH and NO3 radicals
Résumé
The rate coefficient for the possible reaction of OH radical with N 2 O was determined to be k1 < 1 × 10-17 cm 3 molecule-1 s-1 between 253 and 372 K using pulsed laser photolysis to generate OH radicals and pulsed laser induced fluorescence to detect them. The rate coefficient for the reaction of NO3 radical with N2O was measured to be k2 < 5 × 10-20 cm 3 molecule-1 s-1 at 298 K using a direct method that involves a larger reaction chamber equipped with cavity ring down spectroscopic detection of NO3 and N2O5. Various tests were carried out ensure the accuracy of our measurements. Based on our measured upper limits, we suggest that these two reactions alter the atmospheric lifetime of N2O of ~120 years by less than 4%.
Domaines
Sciences de l'environnement
Fichier principal
N2O+OH_NO3 reactions_Revision-Oct 22_2019.pdf (423.34 Ko)
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N2O+OH and NO3 - Supplemetary Information Oct22_2019.pdf (634.79 Ko)
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