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| Titel |
Measurements of natural deposition ice nuclei in Córdoba, Argentina |
| VerfasserIn |
M. L. López, E. E. Avila |
| 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 ; 13, no. 6 ; Nr. 13, no. 6 (2013-03-15), S.3111-3119 |
| Datensatznummer |
250018521
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| Publikation (Nr.) |
 copernicus.org/acp-13-3111-2013.pdf |
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| Zusammenfassung |
| Ice nucleation in the atmosphere is of practical and fundamental importance
since ice crystals influence the release of snow, rain and hail. Suspended
aerosols in the atmosphere typically initiate freezing at temperatures below
−15 °C; although occasionally freezing occurs at higher
temperatures. In this work we describe an experimental device designed to
measure the concentration of natural ice nuclei under controlled temperature
and supersaturation conditions. The measurements were performed at Córdoba
City, for temperatures between −15 °C and
−30 °C and the sampled air was supersaturated with respect
to ice and subsaturated with respect to liquid water; under these conditions
the deposition ice nuclei were quantified. There are few studies reported in
the literature regarding measurements of deposition ice nuclei concentration
and, to our knowledge, there are no previous laboratory data of this kind of
ice nuclei for T < −20 °C. The results show that the number
of deposition ice nuclei increases at colder temperatures and higher
supersaturations. These results are in general in good agreement with results
previously reported by other authors. A fitting function which depends on
temperature and supersaturation is proposed to parameterize the results
obtained in the present work. |
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