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| Titel |
Case study of the development of polar stratospheric clouds using bistatic imaging |
| VerfasserIn |
C.-F. Enell, U. Brandstrom, B. Gustavsson, S. Kirkwood  , K. Stebel, Å. Steen |
| 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 ; 21, no. 8 ; Nr. 21, no. 8, S.1869-1878 |
| Datensatznummer |
250014683
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| Publikation (Nr.) |
 copernicus.org/angeo-21-1869-2003.pdf |
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| Zusammenfassung |
The formation of polar
stratospheric clouds (PSCs) is closely related to wave activity on different
scales since waves propagating into the stratosphere perturb the temperature
profile. We present here a case study of the development of visible PSCs
(mother-of-pearl clouds), appearing at the polar vortex edge on 9 January 1997,
under-taken by means of ground-based cameras. It is shown that the presence of
stratospheric clouds may be detected semi-automatically and that short-term
dynamics such as altitude variations can be tracked in three dimensions. The
PSC field showed distinct features separated by approximately 20 km, which
implies wave-induced temperature variations on that scale. The wave-induced
characteristics were further emphasised by the fact that the PSCs moved within
a sloping spatial surface. The appearance of visible mother-of-pearl clouds
seems to be related to leewave-induced cooling of air masses, where the
synoptic temperature has been close to (but not necessarily below) the
threshold temperatures for PSC condensation.
Key words. Atmospheric composition
and structure (aerosols and particles) – Meteorology and atmospheric dynamics
(middle atmosphere dynamics; instruments and techniques) |
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