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  Heterogeneous nucleation as a potential sulphate-coating mechanism of atmospheric mineral dust particles and implications of coated dust on new particle formation

Korhonen, H., Napari, I., Timmreck, C., Vehkamaki, H., Pirjola, L., Lehtinen, K. E. J., et al. (2003). Heterogeneous nucleation as a potential sulphate-coating mechanism of atmospheric mineral dust particles and implications of coated dust on new particle formation. Journal of Geophysical Research-Atmospheres, 108(D17): 4546. doi:10.1029/2003JD003553.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0012-015B-4 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0014-14B1-2
Genre: Journal Article

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jgrd10643.pdf (Publisher version), 571KB
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jgrd10643.pdf
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2003
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Copyright by American Geophysical Union
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 Creators:
Korhonen, H., Author
Napari, I., Author
Timmreck, Claudia1, 2, Author              
Vehkamaki, H., Author
Pirjola, L., Author
Lehtinen, K. E. J., Author
Lauri, A., Author
Kulmala, M., Author
Affiliations:
1The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society, ou_913550              
2Middle and Upper Atmosphere, The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society, ou_913574              

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 Abstract: The plausibility of heterogeneous conucleation of water, sulphuric acid, and ammonia as a pathway leading to soluble coating of atmospheric mineral dust is investigated. In addition, the effect of such sulphate-coated dust on the formation and growth of atmospheric aerosol particles is addressed. The simulated new particle formation mechanism is ternary nucleation of water, sulphuric acid, and ammonia vapors, while in the condensational growth process the effect of condensable organic vapor is also studied. The results indicate that soluble coating of dust by heterogeneous nucleation can occur at atmospheric sulphuric acid concentrations. In addition, the simulations show that homogeneous ternary nucleation and subsequent growth are decoupled. Although observed ( or even higher) dust concentrations are unable to inhibit new particle formation, coated dust particles acting as condensation and coagulation sinks can prevent the growth of newly formed particles to detectable sizes. This is particularly true in desert areas, where organic vapor concentrations are low.

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Language(s): eng - English
 Dates: 2003-09-10
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 174065
ISI: 000189016800001
DOI: 10.1029/2003JD003553
 Degree: -

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Title: Journal of Geophysical Research-Atmospheres
  Alternative Title : J. Geophys. Res.-Atmos.
Source Genre: Journal
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Pages: - Volume / Issue: 108 (D17) Sequence Number: 4546 Start / End Page: - Identifier: ISSN: 0148-0227