Chemical composition of atmospheric nanoparticles formed from nucleation in Tecamac, Mexico: Evidence for an important role for organic species in nanoparticle growth
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- J. N. Smith
- National Center for Atmospheric Research Boulder Colorado USA
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- M. J. Dunn
- National Center for Atmospheric Research Boulder Colorado USA
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- T. M. VanReken
- National Center for Atmospheric Research Boulder Colorado USA
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- K. Iida
- Department of Mechanical Engineering University of Minnesota Minneapolis Minnesota USA
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- M. R. Stolzenburg
- Department of Mechanical Engineering University of Minnesota Minneapolis Minnesota USA
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- P. H. McMurry
- Department of Mechanical Engineering University of Minnesota Minneapolis Minnesota USA
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- L. G. Huey
- School of Earth and Atmospheric Sciences Georgia Institute of Technology Atlanta Georgia USA
書誌事項
- 公開日
- 2008-02
- 権利情報
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- http://onlinelibrary.wiley.com/termsAndConditions#vor
- DOI
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- 10.1029/2007gl032523
- 公開者
- American Geophysical Union (AGU)
この論文をさがす
説明
<jats:p>We report Thermal Desorption Chemical Ionization Mass Spectrometer (TDCIMS) measurements of the composition of ambient 10–33 nm diameter particles formed from nucleation on 16 March 2006 in Tecamac, Mexico during the Megacity Initiative: Local and Global Research Observations (MILAGRO) field study. On this day, nucleated particles contained far more organics than sulfates: average ion molar ratios with measurement uncertainties for nitrate, organics and sulfur species were 6 ± 2%, 84 ± 5%, and 10 ± 1%, respectively. The measured organic species include nitrogen‐containing organic compounds, organic acids, and hydroxy organic acids. Independent calculations show that sulfuric acid condensation could have accounted for only 10 ± 2% of the growth that was observed on this day, which is consistent with the TDCIMS measurements of composition. It follows that organic compounds play a dominant role the high growth rates that were observed.</jats:p>
収録刊行物
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- Geophysical Research Letters
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Geophysical Research Letters 35 (4), 2008-02
American Geophysical Union (AGU)