Spatial scaling of optical fluctuations during substorm-time aurora
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...
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Copernicus Publications
2007
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ftdoajarticles:oai:doaj.org/article:f2435a8f69264712abf5a19445a37a14 2023-05-15T15:39:16+02:00 Spatial scaling of optical fluctuations during substorm-time aurora B. V. Kozelov K. Rypdal 2007-05-01T00:00:00Z https://doi.org/10.5194/angeo-25-915-2007 https://doaj.org/article/f2435a8f69264712abf5a19445a37a14 EN eng Copernicus Publications https://www.ann-geophys.net/25/915/2007/angeo-25-915-2007.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-25-915-2007 0992-7689 1432-0576 https://doaj.org/article/f2435a8f69264712abf5a19445a37a14 Annales Geophysicae, Vol 25, Pp 915-927 (2007) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2007 ftdoajarticles https://doi.org/10.5194/angeo-25-915-2007 2022-12-31T00:04:34Z 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 Directory of Open Access Journals: DOAJ Articles Barentsburg ENVELOPE(14.212,14.212,78.064,78.064) Svalbard Annales Geophysicae 25 4 915 927 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 B. V. Kozelov K. Rypdal Spatial scaling of optical fluctuations during substorm-time aurora |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
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. |
format |
Article in Journal/Newspaper |
author |
B. V. Kozelov K. Rypdal |
author_facet |
B. V. Kozelov K. Rypdal |
author_sort |
B. V. Kozelov |
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 |
Copernicus Publications |
publishDate |
2007 |
url |
https://doi.org/10.5194/angeo-25-915-2007 https://doaj.org/article/f2435a8f69264712abf5a19445a37a14 |
long_lat |
ENVELOPE(14.212,14.212,78.064,78.064) |
geographic |
Barentsburg Svalbard |
geographic_facet |
Barentsburg Svalbard |
genre |
Barentsburg Svalbard |
genre_facet |
Barentsburg Svalbard |
op_source |
Annales Geophysicae, Vol 25, Pp 915-927 (2007) |
op_relation |
https://www.ann-geophys.net/25/915/2007/angeo-25-915-2007.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-25-915-2007 0992-7689 1432-0576 https://doaj.org/article/f2435a8f69264712abf5a19445a37a14 |
op_doi |
https://doi.org/10.5194/angeo-25-915-2007 |
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Annales Geophysicae |
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25 |
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4 |
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915 |
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927 |
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