Energy parameters of the incident auroral electrons derived by the intensity ratio of auroral emissions
Average energy and total energy flux of the incident electrons in active auroras are estimated by using the intensity ratio of auroral emissions measured with a multi-channel photometer at Syowa Station, Antarctica, in 1990. To avoid possible ambiguities which are mainly caused by quenching effects...
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ftdoajarticles:oai:doaj.org/article:6ae642e8b3b64b2383cb833642282b78 2023-05-15T13:53:21+02:00 Energy parameters of the incident auroral electrons derived by the intensity ratio of auroral emissions Takayuki Ono Ryusuke Satake Takeo Yoshino Takeo Hirasawa 1992-07-01T00:00:00Z https://doi.org/10.15094/00008764 https://doaj.org/article/6ae642e8b3b64b2383cb833642282b78 EN JA eng jpn National Institute of Polar Research http://doi.org/10.15094/00008764 https://doaj.org/toc/0085-7289 https://doaj.org/toc/2432-079X doi:10.15094/00008764 0085-7289 2432-079X https://doaj.org/article/6ae642e8b3b64b2383cb833642282b78 Antarctic Record, Vol 36, Iss 2, Pp 163-180 (1992) Geography (General) G1-922 article 1992 ftdoajarticles https://doi.org/10.15094/00008764 2022-12-31T13:43:28Z Average energy and total energy flux of the incident electrons in active auroras are estimated by using the intensity ratio of auroral emissions measured with a multi-channel photometer at Syowa Station, Antarctica, in 1990. To avoid possible ambiguities which are mainly caused by quenching effects on meta-stable species and complex excitation processes, we used intensity ratios of the emissions of allowed transitions such as 844.6nm (OI), 670.5nm (N_21PG), and 427.8nm (N_2^+1NG). Measured intensity ratios were directly compared with a result of model calculation of auroral emissions. The estimated energy parameters in active auroras showed a rapid change of average energy as well as total energy flux of electrons associated with pulsating auroras and intense auroral arcs. Average energy and total energy flux of the auroral electrons determined by the present method were consistent with the result of the previous in-situ observations of precipitating electrons. Our data analyses on active arcs in break-up phase showed that usage of the 427.8nm emission has difficulty due to a scattering effect of the atmosphere. Usage of 670.5nm emission in place of 427.8nm made it possible to evaluate the energy parameters of electrons even in the vicinity of intense auroral arcs. Article in Journal/Newspaper Antarc* Antarctica Directory of Open Access Journals: DOAJ Articles Syowa Station |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English Japanese |
topic |
Geography (General) G1-922 |
spellingShingle |
Geography (General) G1-922 Takayuki Ono Ryusuke Satake Takeo Yoshino Takeo Hirasawa Energy parameters of the incident auroral electrons derived by the intensity ratio of auroral emissions |
topic_facet |
Geography (General) G1-922 |
description |
Average energy and total energy flux of the incident electrons in active auroras are estimated by using the intensity ratio of auroral emissions measured with a multi-channel photometer at Syowa Station, Antarctica, in 1990. To avoid possible ambiguities which are mainly caused by quenching effects on meta-stable species and complex excitation processes, we used intensity ratios of the emissions of allowed transitions such as 844.6nm (OI), 670.5nm (N_21PG), and 427.8nm (N_2^+1NG). Measured intensity ratios were directly compared with a result of model calculation of auroral emissions. The estimated energy parameters in active auroras showed a rapid change of average energy as well as total energy flux of electrons associated with pulsating auroras and intense auroral arcs. Average energy and total energy flux of the auroral electrons determined by the present method were consistent with the result of the previous in-situ observations of precipitating electrons. Our data analyses on active arcs in break-up phase showed that usage of the 427.8nm emission has difficulty due to a scattering effect of the atmosphere. Usage of 670.5nm emission in place of 427.8nm made it possible to evaluate the energy parameters of electrons even in the vicinity of intense auroral arcs. |
format |
Article in Journal/Newspaper |
author |
Takayuki Ono Ryusuke Satake Takeo Yoshino Takeo Hirasawa |
author_facet |
Takayuki Ono Ryusuke Satake Takeo Yoshino Takeo Hirasawa |
author_sort |
Takayuki Ono |
title |
Energy parameters of the incident auroral electrons derived by the intensity ratio of auroral emissions |
title_short |
Energy parameters of the incident auroral electrons derived by the intensity ratio of auroral emissions |
title_full |
Energy parameters of the incident auroral electrons derived by the intensity ratio of auroral emissions |
title_fullStr |
Energy parameters of the incident auroral electrons derived by the intensity ratio of auroral emissions |
title_full_unstemmed |
Energy parameters of the incident auroral electrons derived by the intensity ratio of auroral emissions |
title_sort |
energy parameters of the incident auroral electrons derived by the intensity ratio of auroral emissions |
publisher |
National Institute of Polar Research |
publishDate |
1992 |
url |
https://doi.org/10.15094/00008764 https://doaj.org/article/6ae642e8b3b64b2383cb833642282b78 |
geographic |
Syowa Station |
geographic_facet |
Syowa Station |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Antarctic Record, Vol 36, Iss 2, Pp 163-180 (1992) |
op_relation |
http://doi.org/10.15094/00008764 https://doaj.org/toc/0085-7289 https://doaj.org/toc/2432-079X doi:10.15094/00008764 0085-7289 2432-079X https://doaj.org/article/6ae642e8b3b64b2383cb833642282b78 |
op_doi |
https://doi.org/10.15094/00008764 |
_version_ |
1766258402507358208 |