Atmos. Chem. Phys. Discuss., 13, 14977-15005, 2013
www.atmos-chem-phys-discuss.net/13/14977/2013/
doi:10.5194/acpd-13-14977-2013
© Author(s) 2013. This work is distributed
under the Creative Commons Attribution 3.0 License.
Review Status
This discussion paper has been under review for the journal Atmospheric Chemistry and Physics (ACP). Please refer to the corresponding final paper in ACP.
The simulations of sulfuric acid concentration and new particle formation in an urban atmosphere in China
Z. B. Wang1,2, M. Hu1, D. Mogensen3, D. L. Yue1, J. Zheng4, R. Y. Zhang1,4, Y. Liu1, B. Yuan1, X. Li1,5, M. Shao1, L. Zhou3, Z. J. Wu1,2, A. Wiedensohler2, and M. Boy3
1State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
2Leibniz Institute for Tropospheric Research, Permoserstr. 15, 04318 Leipzig, Germany
3Department of Physics, University of Helsinki, P.O. Box 64, 00014 Helsinki, Finland
4Department of Atmospheric Science, Texas A&M University, College Station, Texas 77843, USA
5Institute für Energie- und Klimaforschung Troposphäre (IEK-8), Forschungszentrum Jülich, 52425 Jülich, Germany

Abstract. Simulations of sulfuric acid concentration and new particle formation are performed by using the zero-dimensional version of the model MALTE (Model to predict new Aerosol formation in the Lower TropospherE) and measurements from the Campaign of Air Quality Research in Beijing and Surrounding areas (CAREBeijing) in 2008. Chemical reactions from the Master Chemical Mechanism Version 3.2 (MCM v3.2) are used in the model. High correlation (slope = 0.72, R = 0.74) between the modelled and observed sulfuric acid concentrations is found during daytime (06:00–18:00). The aerosol dynamics are simulated by the University of Helsinki Multicomponent Aerosol (UHMA) model including several nucleation mechanisms. The results indicate that the model is able to predict the on- and offset of new particle formation in an urban atmosphere in China. In addition, the number concentrations of newly formed particles in kinetic-type nucleation including homogenous homomolecular (J=K[H2SO4]2) and homogenous heteromolecular nucleation involving organic vapours (J=Khet[H2SO4][Org]) are in satisfactory agreement with the observations. However, the specific organic compounds possibly participate in the nucleation process should be investigated in further studies.

Citation: Wang, Z. B., Hu, M., Mogensen, D., Yue, D. L., Zheng, J., Zhang, R. Y., Liu, Y., Yuan, B., Li, X., Shao, M., Zhou, L., Wu, Z. J., Wiedensohler, A., and Boy, M.: The simulations of sulfuric acid concentration and new particle formation in an urban atmosphere in China, Atmos. Chem. Phys. Discuss., 13, 14977-15005, doi:10.5194/acpd-13-14977-2013, 2013.
 
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