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| Titel |
An explanation for some fallstreak clouds |
| VerfasserIn |
R. M. Worthington |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 20, no. 5 ; Nr. 20, no. 5, S.711-715 |
| Datensatznummer |
250014402
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| Publikation (Nr.) |
 copernicus.org/angeo-20-711-2002.pdf |
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| Zusammenfassung |
Fallstreak cirrus clouds
are associated with super-saturated air, together with waves, instabilities
and/or turbulence; however, their precise cause is usually uncertain. This
paper uses already-published satellite, radiosonde and radar data, reanalysed
to study some large fallstreaks which had been previously overlooked. The
fallstreaks – up to 60 km long with a parent cloud 20 km wide – are caused
by lifting and/or turbulence from a mountain wave, rather than, for example,
Kelvin-Helmholtz instabilities. If turbulent breaking of mountain waves affects
ice particle formation, this may be relevant for the seeder-feeder effect on
orographic rain, and the efficiency of mountain-wave polar stratospheric clouds
for ozone depletion.
Key words. Meteorology and
atmospheric dynamics (turbulence; waves and tides) – Atmospheric composition
and structure (cloud physics and chemistry) |
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