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| Titel |
Parameterization of ion-induced nucleation rates based on ambient observations |
| VerfasserIn |
T. Nieminen, P. Paasonen, H. E. Manninen, K. Sellegri, V.-M. Kerminen, M. Kulmala  |
| 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 ; 11, no. 7 ; Nr. 11, no. 7 (2011-04-11), S.3393-3402 |
| Datensatznummer |
250009600
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| Publikation (Nr.) |
 copernicus.org/acp-11-3393-2011.pdf |
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| Zusammenfassung |
| Atmospheric ions participate in the formation of new atmospheric aerosol
particles, yet their exact role in this process has remained unclear. Here
we derive a new simple parameterization for ion-induced nucleation or, more
precisely, for the formation rate of charged 2-nm particles. The
parameterization is semi-empirical in the sense that it is based on
comprehensive results of one-year-long atmospheric cluster and particle
measurements in the size range ~1–42 nm within the EUCAARI (European
Integrated project on Aerosol Cloud Climate and Air Quality interactions)
project. Data from 12 field sites across Europe measured with different
types of air ion and cluster mobility spectrometers were used in our
analysis, with more in-depth analysis made using data from four stations
with concomitant sulphuric acid measurements. The parameterization is given
in two slightly different forms: a more accurate one that requires
information on sulfuric acid and nucleating organic vapor concentrations,
and a simpler one in which this information is replaced with the global
radiation intensity. These new parameterizations are applicable to all
large-scale atmospheric models containing size-resolved
aerosol microphysics, and a scheme to calculate concentrations of sulphuric
acid, condensing organic vapours and cluster ions. |
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