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| Titel |
The red sky enigma over Svalbard in December 2002: a model using polar stratospheric clouds |
| VerfasserIn |
N. D. Lloyd, D. A. Degenstein, F. Sigernes, E. J. Llewellyn, D. A. Lorentzen |
| 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 ; 23, no. 5 ; Nr. 23, no. 5 (2005-07-27), S.1603-1610 |
| Datensatznummer |
250015250
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| Publikation (Nr.) |
 copernicus.org/angeo-23-1603-2005.pdf |
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| Zusammenfassung |
| An anomalous red glow due to scattered sunlight was observed at
Longyearbyen (78° N, 15° E) on 6 December 2002 from
07:30 UT to 13:30 UT when the solar zenith angle varied between
100.7° and 104°. A model for this red sky event
using sunlight scattered in a two stage process by Polar
Stratospheric Clouds (PSC) at 25km is presented and demonstrated
to be feasible. The model requires a significant fraction of the
polar vortex, which is cold enough for the formation of ice PSC,
to be occupied with PSC with an integrated vertical extinction of
approximately 0.037 at 845nm. Given these conditions, the model
is able to predict, within an order of magnitude, the spatial
distribution of intensities measured by meridional scanning
photometers located at Longyearbyen across the visible and near
infra-red spectrum.
Keywords. Aerosols and particles; Transmission and scattering
of radiation; Polar Meteorology |
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