@article {24919,
	title = {Heterogeneous N2O5 reactions on atmospheric aerosols at four Chinese sites: improving model representation of uptake parameters},
	journal = {Atmospheric Chemistry and Physics},
	volume = {20},
	number = {7},
	year = {2020},
	note = {Ld5gvTimes Cited:1Cited References Count:62},
	month = {Apr 15},
	pages = {4367-4378},
	abstract = {Heterogeneous reactivity of N2O5 on aerosols is a critical parameter in assessing NOx fate, nitrate production, and particulate chloride activation. Accurate measurement of its uptake coefficient (gamma N2O5) and representation in air quality models are challenging, especially in the polluted environment. With an in situ aerosol flow-tube system, the gamma N2O5 was directly measured on ambient aerosols at two rural sites in northern and southern China. The results were analyzed together with the gamma N2O5 derived from previous field studies in China to obtain a holistic picture of gamma N2O5 uptake and the influencing factors under various climatic and chemical conditions. The field-derived or measured gamma N2O5 was generally promoted by the aerosol water content and suppressed by particle nitrate. Significant discrepancies were found between the measured gamma N2O5 and that estimated from laboratory-determined parameterizations. An observation-based empirical parameterization was derived in the present work, which better reproduced the mean value and variability of the observed gamma N2O5. Incorporating this new parameterization into a regional air quality model (WRF-CMAQ) has improved the simulation of N2O5, nitrogen oxides, and secondary nitrate in the polluted regions of China.},
	keywords = {chemical-composition, clno2, dinitrogen pentoxide, gaseous n2o5, nitrate formation, nitryl chloride, particle-phase, reaction probability, sulfuric-acid, uptake coefficients},
	isbn = {1680-7316},
	author = {C. Yu and Z. Wang and Xia, M. and Fu, X. and W.H. Wang and Tham, Y. J. and Chen, T. S. and Zheng, P. G. and H.Y. Li and Shan, Y. and XF Wang and Xue, L. K. and Y. Zhou and Yue, D. L. and Ou, Y. B. and Gao, J. and Lu, K. D. and Brown, S. S. and Zhang, Y. H. and T. Wang}
}
