Observation of O + ( 4 P- 4 D 0 ) lines in electron aurora over Svalbard
International audience 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 ? , N + 2 1N(0,2) and N + 2 1N(1,3)). The oxygen ion multiplet (4639-4696Å) is blended with the band. I...
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ftinsu:oai:HAL:hal-00317574v1 2023-11-12T04:27:03+01:00 Observation of O + ( 4 P- 4 D 0 ) lines in electron aurora over Svalbard Ivchenko, N. Rees, M. H. Lanchester, B. S. Lummerzheim, D. Galand, M. Throp, K. Furniss, I. School of Physics and Astronomy Nottingham University of Nottingham, UK (UON) Alfven Laboratory KTH Royal Institute of Technology Stockholm (KTH ) Geophysical Institute Center for Space Physics Boston (CSP) Boston University Boston (BU) Atmospheric Physics Laboratory UCL London University College of London London (UCL) 2004-09-07 https://hal.science/hal-00317574 https://hal.science/hal-00317574/document https://hal.science/hal-00317574/file/angeo-22-2805-2004.pdf en eng HAL CCSD European Geosciences Union hal-00317574 https://hal.science/hal-00317574 https://hal.science/hal-00317574/document https://hal.science/hal-00317574/file/angeo-22-2805-2004.pdf info:eu-repo/semantics/OpenAccess ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00317574 Annales Geophysicae, 2004, 22 (8), pp.2805-2817 [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 2004 ftinsu 2023-10-25T16:25:15Z International audience 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 ? , 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 Institut national des sciences de l'Univers: HAL-INSU Norway Svalbard |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
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 Ivchenko, N. Rees, M. H. Lanchester, B. S. Lummerzheim, D. Galand, M. Throp, K. Furniss, I. Observation of O + ( 4 P- 4 D 0 ) lines in electron aurora over Svalbard |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience 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 ? , 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 . |
author2 |
School of Physics and Astronomy Nottingham University of Nottingham, UK (UON) Alfven Laboratory KTH Royal Institute of Technology Stockholm (KTH ) Geophysical Institute Center for Space Physics Boston (CSP) Boston University Boston (BU) Atmospheric Physics Laboratory UCL London University College of London London (UCL) |
format |
Article in Journal/Newspaper |
author |
Ivchenko, N. Rees, M. H. Lanchester, B. S. Lummerzheim, D. Galand, M. Throp, K. Furniss, I. |
author_facet |
Ivchenko, N. Rees, M. H. Lanchester, B. S. Lummerzheim, D. Galand, M. Throp, K. Furniss, I. |
author_sort |
Ivchenko, N. |
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 |
HAL CCSD |
publishDate |
2004 |
url |
https://hal.science/hal-00317574 https://hal.science/hal-00317574/document https://hal.science/hal-00317574/file/angeo-22-2805-2004.pdf |
geographic |
Norway Svalbard |
geographic_facet |
Norway Svalbard |
genre |
Svalbard |
genre_facet |
Svalbard |
op_source |
ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00317574 Annales Geophysicae, 2004, 22 (8), pp.2805-2817 |
op_relation |
hal-00317574 https://hal.science/hal-00317574 https://hal.science/hal-00317574/document https://hal.science/hal-00317574/file/angeo-22-2805-2004.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782340800173047808 |