Preprints
https://doi.org/10.5194/acpd-13-3419-2013
https://doi.org/10.5194/acpd-13-3419-2013
 
06 Feb 2013
06 Feb 2013
Status: this preprint was under review for the journal ACP but the revision was not accepted.

Investigation of the connections between atmospheric new particle formation and organics at an urban site of Beijing

Z. B. Wang1,2, M. Hu1, Z. J. Wu1,2, D. L. Yue1, J. Zheng3, R. Y. Zhang1,3, X. Y. Pei4, P. Paasonen4,5, M. Dal Maso4, M. Boy4, and A. Wiedensohler2 Z. B. Wang et al.
  • 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 Atmospheric Science, Texas A&M University, College Station, Texas 77843, USA
  • 4Department of Physics, University of Helsinki, P.O. Box 64, 00014 Helsinki, Finland
  • 5International Institute for Applied Systems Analysis, Schlossplatz 1, 2361 Laxenburg, Austria

Abstract. The role of low-volatility organic vapors in atmospheric new particle formation has been studied based on a data set of 17 nucleation events observed during the CAREBeijing 2008 campaign. The particle formation rates show good correlations with sulfuric acid and organic vapors implying that both play an important role in the atmospheric new particle formation. High correlation coefficients are observed in all investigated nucleation mechanisms. The best fit (R = 0.73, slope = 1.1) between the observed and modelled particle formation rates is achieved with the homogenous nucleation theory of sulfuric acid (both homomolecularly and hetermolecularly) with separate coefficients in J=KSA1[H2SO4]2+KSA2[H2SO4][Org]. The contributions of the sulfuric acid and the organics involving terms have been 43% and 57%, respectively. In addition, the higher particle formation rates are observed on polluted nucleation days, indicating the organic vapors should be involved in the new particle formation process in the polluted urban environment of Beijing with high background aerosol loading.

Z. B. Wang et al.

 
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement

Z. B. Wang et al.

Z. B. Wang et al.

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