Spatial scaling of optical fluctuations during substorm-time aurora
International audience A study of statistical features of auroras during substorm activity is presented, emphasizing characteristics which are commonly applied to turbulent flows. Data from all-sky television (TV) observations from the Barentsburg observatory (Svalbard) have been used. Features of t...
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ftccsdartic:oai:HAL:hal-00318310v1 2023-11-12T04:15:06+01:00 Spatial scaling of optical fluctuations during substorm-time aurora Kozelov, B. V. Rypdal, K. Polar Geophysical Institute of Russian Academy of Sciences (PGI) Russian Academy of Sciences Moscow (RAS) Department of Physics and Technology Tromsø University of Tromsø (UiT) 2007-05-08 https://hal.science/hal-00318310 https://hal.science/hal-00318310/document https://hal.science/hal-00318310/file/angeo-25-915-2007.pdf en eng HAL CCSD European Geosciences Union hal-00318310 https://hal.science/hal-00318310 https://hal.science/hal-00318310/document https://hal.science/hal-00318310/file/angeo-25-915-2007.pdf info:eu-repo/semantics/OpenAccess ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00318310 Annales Geophysicae, 2007, 25 (4), pp.915-927 [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 2007 ftccsdartic 2023-10-21T23:06:37Z International audience A study of statistical features of auroras during substorm activity is presented, emphasizing characteristics which are commonly applied to turbulent flows. Data from all-sky television (TV) observations from the Barentsburg observatory (Svalbard) have been used. Features of the probability density function (PDF) of auroral fluctuations have been examined at different spatial scales. We find that the observed PDFs generally have a non-Gaussian, heavy-tailed shape. The generalized structure function (GSF) for the auroral luminosity fluctuations has been analyzed to determine the scaling properties of the higher (up to 6) order moments, and the evolution of the scaling indices during the actual substorm event has been determined. The scaling features obtained can be interpreted as signatures of turbulent motion of the magnetosphere-ionosphere plasma. Relations to previously obtained results of avalanche analysis of the same event, as well as possible implications for the validity of self-organized criticality models and turbulence models of the substorm activity, are discussed. Article in Journal/Newspaper Barentsburg Svalbard Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Svalbard Barentsburg ENVELOPE(14.212,14.212,78.064,78.064) |
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 Kozelov, B. V. Rypdal, K. Spatial scaling of optical fluctuations during substorm-time aurora |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience A study of statistical features of auroras during substorm activity is presented, emphasizing characteristics which are commonly applied to turbulent flows. Data from all-sky television (TV) observations from the Barentsburg observatory (Svalbard) have been used. Features of the probability density function (PDF) of auroral fluctuations have been examined at different spatial scales. We find that the observed PDFs generally have a non-Gaussian, heavy-tailed shape. The generalized structure function (GSF) for the auroral luminosity fluctuations has been analyzed to determine the scaling properties of the higher (up to 6) order moments, and the evolution of the scaling indices during the actual substorm event has been determined. The scaling features obtained can be interpreted as signatures of turbulent motion of the magnetosphere-ionosphere plasma. Relations to previously obtained results of avalanche analysis of the same event, as well as possible implications for the validity of self-organized criticality models and turbulence models of the substorm activity, are discussed. |
author2 |
Polar Geophysical Institute of Russian Academy of Sciences (PGI) Russian Academy of Sciences Moscow (RAS) Department of Physics and Technology Tromsø University of Tromsø (UiT) |
format |
Article in Journal/Newspaper |
author |
Kozelov, B. V. Rypdal, K. |
author_facet |
Kozelov, B. V. Rypdal, K. |
author_sort |
Kozelov, B. V. |
title |
Spatial scaling of optical fluctuations during substorm-time aurora |
title_short |
Spatial scaling of optical fluctuations during substorm-time aurora |
title_full |
Spatial scaling of optical fluctuations during substorm-time aurora |
title_fullStr |
Spatial scaling of optical fluctuations during substorm-time aurora |
title_full_unstemmed |
Spatial scaling of optical fluctuations during substorm-time aurora |
title_sort |
spatial scaling of optical fluctuations during substorm-time aurora |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.science/hal-00318310 https://hal.science/hal-00318310/document https://hal.science/hal-00318310/file/angeo-25-915-2007.pdf |
long_lat |
ENVELOPE(14.212,14.212,78.064,78.064) |
geographic |
Svalbard Barentsburg |
geographic_facet |
Svalbard Barentsburg |
genre |
Barentsburg Svalbard |
genre_facet |
Barentsburg Svalbard |
op_source |
ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00318310 Annales Geophysicae, 2007, 25 (4), pp.915-927 |
op_relation |
hal-00318310 https://hal.science/hal-00318310 https://hal.science/hal-00318310/document https://hal.science/hal-00318310/file/angeo-25-915-2007.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782332536088690688 |