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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ftccsdartic: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 ftccsdartic 2023-10-21T23:07:07Z 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 Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Svalbard Longyearbyen |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
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 |
Svalbard Longyearbyen |
geographic_facet |
Svalbard Longyearbyen |
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 |
_version_ |
1782336519930904576 |