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Charged meteoric smoke as ice nuclei in the mesosphere. Part 1: A review of basic concepts
Stockholm University, Faculty of Science, Department of Meteorology .
Stockholm University, Faculty of Science, Department of Meteorology .
2009 (English)In: Journal of Atmospheric and Solar-Terrestrial Physics, ISSN 1364-6826, Vol. 71, no 12, 1225-1235 p.Article in journal (Refereed) Published
Abstract [en]

The role of meteoric smoke as condensation nuclei for mesospheric ice has recently been challenged by model simulations on the global transport of meteoric material. At the same time a considerable fraction of smoke particles is charged in the mesosphere. This has significant effects on nucleation processes as it can remove the Kelvin barrier. We suggest that in particular nucleation on negatively charged smoke is likely to be a dominant mechanism for mesospheric ice formation. This is in contrast to nucleation on positive ion clusters as the latter is largely hampered by efficient ion/electron recombination. Surprisingly, the large potential of nucleation on charged smoke has so far not been considered in mesospheric ice models. A challenging question concerns the fraction of mesospheric smoke that is actually charged. An improved understanding of mesospheric charging and nucleation will require laboratory experiments on nuclei in the transition regime between molecular and particulate sizes.

Place, publisher, year, edition, pages
2009. Vol. 71, no 12, 1225-1235 p.
Keyword [en]
Mesosphere, NLC ice nucleation, Meteoric smoke, Charging processes
National Category
Meteorology and Atmospheric Sciences
Research subject
Atmospheric Sciences
Identifiers
URN: urn:nbn:se:su:diva-35748DOI: 10.1016/j.jastp.2009.04.012ISI: 000268905500003OAI: oai:DiVA.org:su-35748DiVA: diva2:287948
Available from: 2010-01-20 Created: 2010-01-20 Last updated: 2010-01-20Bibliographically approved

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Gumbel, Jörg
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