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6. S. Song, M. Gao, W. Xu, J. Shao, G. Shi, S. Wang, Y. Wang, Y. Sun, M.B. McElroy, Fine
particle pH for Beijing winter haze as inferred from different thermodynamic equilibrium
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7. J.D. Surratt, A.W.H. Chan, N.C. Eddingsaas, M. Chan, C.L. Loza, A.J. Kwan, S.P. Hersey, R.C.
Flagan, P.O. Wennberg, J.H. Seinfeld, Reactive intermediates revealed in secondary organic
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Y. Wang, J. Zheng, J. Secrest, Y. Li, Y. Wang, H. Li, N. Li, R. Zhang, Particle acidity and
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Takami, A.M. Middlebrook, Y.L. Sun, K. Dzepina, E. Dunlea, K. Docherty, P.F. DeCarlo,
D. Salcedo, T. Onasch, J.T. Jayne, T. Miyoshi, A. Shimono, S. Hatakeyama, N. Takegawa,
Y. Kondo, J. Schneider, F. Drewnick, S. Borrmann, S. Weimer, K. Demerjian, P. Williams,
K. Bower, R. Bahreini, L. Cottrell, R.J. Griffin, J., Sun, J.Y. Rautiainen, Y.M. Zhang,
D.R. Worsnop, Ubiquity and dominance of oxygenated species in organic aerosols in
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Y. Qian and A. G. Russell
5. J. Lelieveld, J.S. Evans, M. Fnais, D. Giannadaki, A. Pozzer, The contribution of outdoor air
pollution sources to premature mortality on a global scale. Nature 525, 367–371 (2015). https://
doi.org/10.1038/nature15371
6. S. Song, M. Gao, W. Xu, J. Shao, G. Shi, S. Wang, Y. Wang, Y. Sun, M.B. McElroy, Fine
particle pH for Beijing winter haze as inferred from different thermodynamic equilibrium
models. Atmos. Chem. Phys. Discuss, 1–26 (2018). https://doi.org/10.5194/acp-2018-6
7. J.D. Surratt, A.W.H. Chan, N.C. Eddingsaas, M. Chan, C.L. Loza, A.J. Kwan, S.P. Hersey, R.C.
Flagan, P.O. Wennberg, J.H. Seinfeld, Reactive intermediates revealed in secondary organic
aerosol formation from isoprene. Proc. Natl. Acad. Sci. U. S. A. 107, 6640–6645 (2010). https://
doi.org/10.1073/pnas.0911114107
8. G. Wang, F. Zhang, J. Peng, L. Duan, Y. Ji, W. Marrero-Ortiz, J. Wang, J. Li, C. Wu, C. Cao,
Y. Wang, J. Zheng, J. Secrest, Y. Li, Y. Wang, H. Li, N. Li, R. Zhang, Particle acidity and
sulfate production during severe haze events in China cannot be reliably inferred by assuming
a mixture of inorganic salts. Atmos. Chem. Phys. Discuss. 1–23 (2018). https://doi.org/10.
5194/acp-2018-185
9. R.J. Weber, H. Guo, A.G. Russell, A. Nenes, High aerosol acidity despite declining atmospheric
sulfate concentrations over the past 15 years. Nat. Geosci. 9, 282–285 (2016). https://doi.org/
10.1038/ngeo2665
10. Q. Zhang, J.L. Jimenez, M.R. Canagaratna, J.D. Allan, H. Coe, I. Ulbrich, M.R. Alfarra, A.
Takami, A.M. Middlebrook, Y.L. Sun, K. Dzepina, E. Dunlea, K. Docherty, P.F. DeCarlo,
D. Salcedo, T. Onasch, J.T. Jayne, T. Miyoshi, A. Shimono, S. Hatakeyama, N. Takegawa,
Y. Kondo, J. Schneider, F. Drewnick, S. Borrmann, S. Weimer, K. Demerjian, P. Williams,
K. Bower, R. Bahreini, L. Cottrell, R.J. Griffin, J., Sun, J.Y. Rautiainen, Y.M. Zhang,
D.R. Worsnop, Ubiquity and dominance of oxygenated species in organic aerosols in
anthropogenically-influenced Northern Hemisphere midlatitudes: UBIQUITY AND DOMINANCE OF OXYGENATED OA. Geophys. Res. Lett. 34, n/a-n/a (2007). https://doi.org/10.
1029/2007GL029979