دورية أكاديمية
Nighttime NO emissions strongly suppress chlorine and nitrate radical formation during the winter in Delhi
| العنوان: | Nighttime NO emissions strongly suppress chlorine and nitrate radical formation during the winter in Delhi |
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| المؤلفون: | S. L. Haslett, D. M. Bell, V. Kumar, J. G. Slowik, D. S. Wang, S. Mishra, N. Rastogi, A. Singh, D. Ganguly, J. Thornton, F. Zheng, Y. Li, W. Nie, Y. Liu, W. Ma, C. Yan, M. Kulmala, K. R. Daellenbach, D. Hadden, U. Baltensperger, A. S. H. Prevot, S. N. Tripathi, C. Mohr |
| المصدر: | Atmospheric Chemistry and Physics, Vol 23, Pp 9023-9036 (2023) |
| بيانات النشر: | Copernicus Publications, 2023. |
| سنة النشر: | 2023 |
| المجموعة: | LCC:Physics LCC:Chemistry |
| مصطلحات موضوعية: | Physics, QC1-999, Chemistry, QD1-999 |
| الوصف: | Atmospheric pollution in urban regions is highly influenced by oxidants due to their important role in the formation of secondary organic aerosol (SOA) and smog. These include the nitrate radical (NO3), which is typically considered a nighttime oxidant, and the chlorine radical (Cl), an extremely potent oxidant that can be released in the morning in chloride-rich environments as a result of nocturnal build-up of nitryl chloride (ClNO2). Chloride makes up a higher percentage of particulate matter in Delhi than has been observed anywhere else in the world, which results in Cl having an unusually strong influence in this city. Here, we present observations and model results revealing that atmospheric chemistry in Delhi exhibits an unusual diel cycle that is controlled by high concentrations of NO during the night. As a result of this, the formation of both NO3 and dinitrogen pentoxide (N2O5), a precursor of ClNO2 and thus Cl, are suppressed at night and increase to unusually high levels during the day. Our results indicate that a substantial reduction in nighttime NO has the potential to increase both nocturnal oxidation via NO3 and the production of Cl during the day. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1680-7316 1680-7324 |
| Relation: | https://acp.copernicus.org/articles/23/9023/2023/acp-23-9023-2023.pdf; https://doaj.org/toc/1680-7316; https://doaj.org/toc/1680-7324 |
| DOI: | 10.5194/acp-23-9023-2023 |
| URL الوصول: | https://doaj.org/article/01b8743e18504b4991ff364574496b40 |
| رقم الأكسشن: | edsdoj.01b8743e18504b4991ff364574496b40 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 16807316 16807324 |
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| DOI: | 10.5194/acp-23-9023-2023 |