The red sky enigma over Svalbard in December 2002: a model using polar stratospheric clouds

International audience 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 b...

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Main Authors: Lloyd, N. D., Degenstein, D. A., Sigernes, F., Llewellyn, E. J., Lorentzen, D. A.
Other Authors: Institute of Space and Atmospheric Studies Saskatoon (ISAS), Department of Physics and Engineering Physics Saskatoon, University of Saskatchewan Saskatoon (U of S)-University of Saskatchewan Saskatoon (U of S), The University Centre in Svalbard (UNIS)
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 2005
Subjects:
Online Access:https://hal.science/hal-00317813
https://hal.science/hal-00317813/document
https://hal.science/hal-00317813/file/angeo-23-1603-2005.pdf
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spelling ftinsu:oai:HAL:hal-00317813v1 2023-11-12T04:20:43+01:00 The red sky enigma over Svalbard in December 2002: a model using polar stratospheric clouds Lloyd, N. D. Degenstein, D. A. Sigernes, F. Llewellyn, E. J. Lorentzen, D. A. Institute of Space and Atmospheric Studies Saskatoon (ISAS) Department of Physics and Engineering Physics Saskatoon University of Saskatchewan Saskatoon (U of S)-University of Saskatchewan Saskatoon (U of S) The University Centre in Svalbard (UNIS) 2005-07-27 https://hal.science/hal-00317813 https://hal.science/hal-00317813/document https://hal.science/hal-00317813/file/angeo-23-1603-2005.pdf en eng HAL CCSD European Geosciences Union hal-00317813 https://hal.science/hal-00317813 https://hal.science/hal-00317813/document https://hal.science/hal-00317813/file/angeo-23-1603-2005.pdf info:eu-repo/semantics/OpenAccess ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00317813 Annales Geophysicae, 2005, 23 (5), pp.1603-1610 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2005 ftinsu 2023-10-25T16:25:11Z International audience 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 Article in Journal/Newspaper Longyearbyen Svalbard Institut national des sciences de l'Univers: HAL-INSU Longyearbyen Svalbard
institution Open Polar
collection Institut national des sciences de l'Univers: HAL-INSU
op_collection_id ftinsu
language English
topic [SDU.OCEAN]Sciences of the Universe [physics]/Ocean
Atmosphere
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences
spellingShingle [SDU.OCEAN]Sciences of the Universe [physics]/Ocean
Atmosphere
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences
Lloyd, N. D.
Degenstein, D. A.
Sigernes, F.
Llewellyn, E. J.
Lorentzen, D. A.
The red sky enigma over Svalbard in December 2002: a model using polar stratospheric clouds
topic_facet [SDU.OCEAN]Sciences of the Universe [physics]/Ocean
Atmosphere
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences
description International audience 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
author2 Institute of Space and Atmospheric Studies Saskatoon (ISAS)
Department of Physics and Engineering Physics Saskatoon
University of Saskatchewan Saskatoon (U of S)-University of Saskatchewan Saskatoon (U of S)
The University Centre in Svalbard (UNIS)
format Article in Journal/Newspaper
author Lloyd, N. D.
Degenstein, D. A.
Sigernes, F.
Llewellyn, E. J.
Lorentzen, D. A.
author_facet Lloyd, N. D.
Degenstein, D. A.
Sigernes, F.
Llewellyn, E. J.
Lorentzen, D. A.
author_sort Lloyd, N. D.
title The red sky enigma over Svalbard in December 2002: a model using polar stratospheric clouds
title_short The red sky enigma over Svalbard in December 2002: a model using polar stratospheric clouds
title_full The red sky enigma over Svalbard in December 2002: a model using polar stratospheric clouds
title_fullStr The red sky enigma over Svalbard in December 2002: a model using polar stratospheric clouds
title_full_unstemmed The red sky enigma over Svalbard in December 2002: a model using polar stratospheric clouds
title_sort red sky enigma over svalbard in december 2002: a model using polar stratospheric clouds
publisher HAL CCSD
publishDate 2005
url https://hal.science/hal-00317813
https://hal.science/hal-00317813/document
https://hal.science/hal-00317813/file/angeo-23-1603-2005.pdf
geographic Longyearbyen
Svalbard
geographic_facet Longyearbyen
Svalbard
genre Longyearbyen
Svalbard
genre_facet Longyearbyen
Svalbard
op_source ISSN: 0992-7689
EISSN: 1432-0576
Annales Geophysicae
https://hal.science/hal-00317813
Annales Geophysicae, 2005, 23 (5), pp.1603-1610
op_relation hal-00317813
https://hal.science/hal-00317813
https://hal.science/hal-00317813/document
https://hal.science/hal-00317813/file/angeo-23-1603-2005.pdf
op_rights info:eu-repo/semantics/OpenAccess
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