Observation of O + ( 4 P- 4 D 0 ) lines in electron aurora over Svalbard
This work reports on observations of O + lines in aurora over Svalbard, Norway. The Spectrographic Imaging Facility measures auroral spectra in three wavelength intervals (H β , N + 2 1N(0,2) and N + 2 1N(1,3)). The oxygen ion multiplet (4639-4696Å) is blended with the band. It is found that in elec...
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ftdoajarticles:oai:doaj.org/article:a8f977023501405c9e1714ec9ed25d7e 2023-05-15T18:29:41+02:00 Observation of O + ( 4 P- 4 D 0 ) lines in electron aurora over Svalbard N. Ivchenko M. H. Rees B. S. Lanchester D. Lummerzheim M. Galand K. Throp I. Furniss 2004-09-01T00:00:00Z https://doi.org/10.5194/angeo-22-2805-2004 https://doaj.org/article/a8f977023501405c9e1714ec9ed25d7e EN eng Copernicus Publications https://www.ann-geophys.net/22/2805/2004/angeo-22-2805-2004.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-22-2805-2004 0992-7689 1432-0576 https://doaj.org/article/a8f977023501405c9e1714ec9ed25d7e Annales Geophysicae, Vol 22, Pp 2805-2817 (2004) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2004 ftdoajarticles https://doi.org/10.5194/angeo-22-2805-2004 2022-12-31T05:36:08Z This work reports on observations of O + lines in aurora over Svalbard, Norway. The Spectrographic Imaging Facility measures auroral spectra in three wavelength intervals (H β , N + 2 1N(0,2) and N + 2 1N(1,3)). The oxygen ion multiplet (4639-4696Å) is blended with the band. It is found that in electron aurora, the brightness of this multiplet, is on average, about 0.1 of the total brightness. A joint optical and incoherent scatter radar study of an electron aurora event shows that the ratio is enhanced when the ionisation in the upper E-layer (140-190km) is significant with respect to the E-layer peak below 130km. Rayed arcs were observed on one such occasion, whereas on other occasions the auroral intensity was below the threshold of the imager. A one-dimensional electron transport model is used to estimate the cross section for production of the multiplet in electron collisions, yielding 0.18x10 -18 cm 2 . Article in Journal/Newspaper Svalbard Directory of Open Access Journals: DOAJ Articles Norway Svalbard Annales Geophysicae 22 8 2805 2817 |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
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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 N. Ivchenko M. H. Rees B. S. Lanchester D. Lummerzheim M. Galand K. Throp I. Furniss Observation of O + ( 4 P- 4 D 0 ) lines in electron aurora over Svalbard |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
This work reports on observations of O + lines in aurora over Svalbard, Norway. The Spectrographic Imaging Facility measures auroral spectra in three wavelength intervals (H β , N + 2 1N(0,2) and N + 2 1N(1,3)). The oxygen ion multiplet (4639-4696Å) is blended with the band. It is found that in electron aurora, the brightness of this multiplet, is on average, about 0.1 of the total brightness. A joint optical and incoherent scatter radar study of an electron aurora event shows that the ratio is enhanced when the ionisation in the upper E-layer (140-190km) is significant with respect to the E-layer peak below 130km. Rayed arcs were observed on one such occasion, whereas on other occasions the auroral intensity was below the threshold of the imager. A one-dimensional electron transport model is used to estimate the cross section for production of the multiplet in electron collisions, yielding 0.18x10 -18 cm 2 . |
format |
Article in Journal/Newspaper |
author |
N. Ivchenko M. H. Rees B. S. Lanchester D. Lummerzheim M. Galand K. Throp I. Furniss |
author_facet |
N. Ivchenko M. H. Rees B. S. Lanchester D. Lummerzheim M. Galand K. Throp I. Furniss |
author_sort |
N. Ivchenko |
title |
Observation of O + ( 4 P- 4 D 0 ) lines in electron aurora over Svalbard |
title_short |
Observation of O + ( 4 P- 4 D 0 ) lines in electron aurora over Svalbard |
title_full |
Observation of O + ( 4 P- 4 D 0 ) lines in electron aurora over Svalbard |
title_fullStr |
Observation of O + ( 4 P- 4 D 0 ) lines in electron aurora over Svalbard |
title_full_unstemmed |
Observation of O + ( 4 P- 4 D 0 ) lines in electron aurora over Svalbard |
title_sort |
observation of o + ( 4 p- 4 d 0 ) lines in electron aurora over svalbard |
publisher |
Copernicus Publications |
publishDate |
2004 |
url |
https://doi.org/10.5194/angeo-22-2805-2004 https://doaj.org/article/a8f977023501405c9e1714ec9ed25d7e |
geographic |
Norway Svalbard |
geographic_facet |
Norway Svalbard |
genre |
Svalbard |
genre_facet |
Svalbard |
op_source |
Annales Geophysicae, Vol 22, Pp 2805-2817 (2004) |
op_relation |
https://www.ann-geophys.net/22/2805/2004/angeo-22-2805-2004.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-22-2805-2004 0992-7689 1432-0576 https://doaj.org/article/a8f977023501405c9e1714ec9ed25d7e |
op_doi |
https://doi.org/10.5194/angeo-22-2805-2004 |
container_title |
Annales Geophysicae |
container_volume |
22 |
container_issue |
8 |
container_start_page |
2805 |
op_container_end_page |
2817 |
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1766212953959301120 |