Articles | Volume 18, issue 14
Atmos. Chem. Phys., 18, 10483–10495, 2018
https://doi.org/10.5194/acp-18-10483-2018

Special issue: In-depth study of air pollution sources and processes within...

Atmos. Chem. Phys., 18, 10483–10495, 2018
https://doi.org/10.5194/acp-18-10483-2018
Research article
23 Jul 2018
Research article | 23 Jul 2018

Fast particulate nitrate formation via N2O5 uptake aloft in winter in Beijing

Haichao Wang et al.

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Cited articles

Baasandorj, M., Hoch, S. W., Bares, R., Lin, J. C., Brown, S. S., Millet, D. B., Martin, R., Kelly, K., Zarzana, K. J., Whiteman, C. D., Dube, W. P., Tonnesen, G., Jaramillo, I. C., and Sohl, J.: Coupling between Chemical and Meteorological Processes under Persistent Cold-Air Pool Conditions: Evolution of Wintertime PM2.5 Pollution Events and N2O5 Observations in Utah's Salt Lake Valley, Environ. Sci. Technol., 51, 5941–5950, 2017. 
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The vertical measurement of NOx and O3 was carried out on a movable carriage on a tower during a winter heavy-haze episode in urban Beijing, China. We found that pNO3- formation via N2O5 uptake was significant at high altitudes (e.g., > 150 m), which was supported by the lower total oxidant (NO2 + O3) level at high altitudes than at ground level. This study highlights the fact that pNO3- formation via N2O5 uptake may be an important source of pNO3- in the urban airshed during wintertime.
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