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A few pptv of gaseous amines have been observed to affect particle nucleation and growth, and it is necessary to understand the sources and concentrations of atmospheric amines. This study presents the source-dependent amines to ammonia emission ratios and simulates methylamines concentrations in a polluted region in China with WRF-Chem. The performance of simulations based on source-dependent ratios is much better than those based on fixed ratios that have been assumed in all previous studies.
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ACP | Articles | Volume 18, issue 11
Atmos. Chem. Phys., 18, 7933–7950, 2018
https://doi.org/10.5194/acp-18-7933-2018
Atmos. Chem. Phys., 18, 7933–7950, 2018
https://doi.org/10.5194/acp-18-7933-2018

Research article 06 Jun 2018

Research article | 06 Jun 2018

High-resolution modeling of gaseous methylamines over a polluted region in China: source-dependent emissions and implications of spatial variations

Jingbo Mao et al.

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Cited articles

Bergman, T., Laaksonen, A., Korhonen, H., Malila, J., Dunne, E. M., Mielonen, T., Lehtinen, K. E. J., Kühn, T., Arola, A., and Kokkola, H.: Geographical and diurnal features of amine-enhanced boundary layer nucleation, J. Geophys. Res.-Atmos., 120, 9606–9624, https://doi.org/10.1002/2015JD023181, 2015. 
Carl, S. A. and Crowley, J. N.: Sequential two (blue) photon absorption by NO2 in the presence of H2 as a source of OH in pulsed photolysis kinetic studies: rate constants for reaction of OH with CH3NH2, (CH3)2NH, (CH3)3N, and C2H5NH2 at 295 K, J. Phys. Chem. A, 102, 8131–8141, 1998. 
Chen, H., Varner, M. E., Gerber, R. B., and Finlayson-Pitts, B. J.: Reactions of Methanesulfonic Acid with Amines and Ammonia as a Source of New Particles in Air, J. Phys. Chem. B, 120, 1526–1536, https://doi.org/10.1021/acs.jpcb.5b07433, 2016. 
Chen, M., Titcombe, M., Jiang, J., Kuang, C., Fischer, M. L., Edgerton, E., Eisele, F. L., Siepmann, J. I., Hanson, D. H., Zhao, J., and McMurry, P. H.: Acid-based chemical reaction model for nucleation rates in the polluted boundary layer, P. Natl. Acad. Sci. USA, 109, 18713–18718, 2012. 
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Short summary
A few pptv of gaseous amines have been observed to affect particle nucleation and growth, and it is necessary to understand the sources and concentrations of atmospheric amines. This study presents the source-dependent amines to ammonia emission ratios and simulates methylamines concentrations in a polluted region in China with WRF-Chem. The performance of simulations based on source-dependent ratios is much better than those based on fixed ratios that have been assumed in all previous studies.
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