@article { ISI:000438156100002,
	title = {Efficient N2O5 uptake and NO3 oxidation in the outflow of urban Beijing},
	journal = {ATMOSPHERIC CHEMISTRY AND PHYSICS},
	volume = {18},
	number = {13},
	year = {2018},
	month = {JUL 10},
	pages = {9705-9721},
	publisher = {COPERNICUS GESELLSCHAFT MBH},
	type = {Article},
	address = {BAHNHOFSALLEE 1E, GOTTINGEN, 37081, GERMANY},
	abstract = {Nocturnal reactive nitrogen compounds play an important role in regional air pollution. Here we present the measurements of dinitrogen pentoxide (N2O5) associated with nitryl chloride (ClNO2) and particulate nitrate (pNO(3)(-)) at a suburban site of Beijing in the summer of 2016. High levels of N2O5 and ClNO2 were observed in the outflow of the urban Beijing air masses, with 1 min average maxima of 937 and 2900 pptv, respectively. The N2O5 uptake coefficients, gamma, and ClNO2 yield, f, were experimentally determined from the observed parameters. The N2O5 uptake coefficient ranged from 0.012 to 0.055, with an average of 0.034 +/- 0.018, which is in the upper range of previous field studies reported in North America and Europe but is a moderate value in the North China Plain (NCP), which reflects efficient N2O5 heterogeneous processes in Beijing. The ClNO2 yield exhibited high variability, with a range of 0.50 to unity and an average of 0.73 +/- 0.25. The concentration of the nitrate radical (NO3) was calculated assuming that the thermal equilibrium between NO3 and N2O5 was maintained. In NOx-rich air masses, the oxidation of nocturnal biogenic volatile organic compounds (BVOCs) was dominated by NO3 rather than O-3. The production rate of organic nitrate (ON) via NO3 + BVOCs was significant, with an average of 0.10 +/- 0.07 ppbvh(-1). We highlight the importance of NO3 oxidation of VOCs in the formation of ON and subsequent secondary organic aerosols in summer in Beijing.},
	issn = {1680-7316},
	doi = {10.5194/acp-18-9705-2018},
	author = {Haichao Wang and Lu, Keding and Song Guo and Zhijun Wu and Dongjie Shang and Zhaofeng Tan and Yujue Wang and Breton, Michael Le and Shengrong Lou and Tang, Mingjin and Yusheng Wu and Wenfei Zhu and Jing Zheng and Limin Zeng and Mattias hallquist and Min Hu and Yuanhang Zhang}
}
