Please use this identifier to cite or link to this item: https://oar.tib.eu/jspui/handle/123456789/467
Files in This Item:
File SizeFormat 
acp-11-12663-2011.pdf2,5 MBAdobe PDFView/Open
Title: Evaluation on the role of sulfuric acid in the mechanisms of new particle formation for Beijing case
Authors: Wang, Z. B.Hu, M.Yue, D. L.Zheng, J.Zhang, R. Y.Wiedensohler, A.Wu, Z. J.Nieminen, T.Boy, M.
Publishers Version: https://doi.org/10.5194/acp-11-12663-2011
Issue Date: 2011
Published in: Atmospheric Chemistry and Physics, Volume 11, Issue 24, Page 12663-12671
Publisher: München : European Geopyhsical Union
Abstract: New particle formation (NPF) is considered as an important mechanism for gas-to-particle transformation, and gaseous sulfuric acid is believed as a crucial precursor. Up to now few field-based studies on nucleation mechanisms and the role of sulfuric acid were conducted in China. In this study, simultaneously measurements of particle number size distributions and gaseous sulfuric acid concentrations were performed from July to September in 2008. Totally, 22 new particle formation events were observed during the entire 85 campaign days. The results show that in the case of both higher source and sink values, the result of the competition between source and sink is more likely the key limiting factor to determine the observation of NPF events in Beijing. The concentrations of gaseous sulfuric acid show good correlations with freshly nucleated particles (N3-6 and formation rates (J3 and J1.5. The power-law relationship between H2SO4 concentration and N3-6 or J is adopted to explore the nucleation mechanism. The exponents are showed a great range (from 1 to 7). More than half of the NPF events exhibit an exponent larger than 2.5. For these cases, the thermodynamic process works better than the activation or kinetic nucleation theories to explain the nucleation events in urban atmosphere of Beijing.
Keywords: aerosol; aerosol composition; concentration (composition); formation mechanism; particle size; power law; size distribution; sulfuric acid; thermodynamics
DDC: 550
License: CC BY 3.0 Unported
Link to License: https://creativecommons.org/licenses/by/3.0/
Appears in Collections:Geowissenschaften



This item is licensed under a Creative Commons License Creative Commons