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| Titel |
Composition of 15–85 nm particles in marine air |
| VerfasserIn |
M. J. Lawler, J. Whitehead, C. O'Dowd, C. Monahan, G. McFiggans, J. N. Smith |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 14, no. 21 ; Nr. 14, no. 21 (2014-11-05), S.11557-11569 |
| Datensatznummer |
250119136
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| Publikation (Nr.) |
 copernicus.org/acp-14-11557-2014.pdf |
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| Zusammenfassung |
| The chemical composition of 15–85 nm diameter particles was measured at
Mace Head, Ireland, during May 2011 using the TDCIMS (thermal desorption
chemical ionization mass spectrometer). Measurable levels of chloride,
sodium, and sulfate were present in essentially all collected samples of
these particles at this coastal Atlantic site. Acetaldehyde and benzoic acid
were also frequently detected. Concomitant particle hygroscopicity
observations usually showed a sea-salt mode and a lower hygroscopicity mode
with growth factors near to that of ammonium sulfate. There were many periods
lasting from hours to about 2 days during which the 10–60 nm particle number
increased dramatically in polar oceanic air. These periods were correlated
with the presence of benzoic acid in the particles and an increase in the
number of lower hygroscopicity mode particles. Very small (< 10 nm)
particles were also present, suggesting that new particle formation
contributed to these nanoparticle enhancement events. |
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