Research note Auroral O + 732/733 nm emission and its relation to ion upflow
Abstract: Observations of auroral oxygen ion emission at 732/733 nm were made at the Aurora station in Longyearbyen (78.2°N, 16.3°E; λ m = 74.9°) using an all-sky spec-trograph (ASG) during the winter season of 2000/2001. A statistical analysis showed that the highest occurrence of oxygen ion aurora...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.520.8499 2023-05-15T16:04:43+02:00 Research note Auroral O + 732/733 nm emission and its relation to ion upflow Naoko Koizumi Shoichi Okano Takeshi Sakanoi Makoto Taguchi Takehiko Aso The Pennsylvania State University CiteSeerX Archives 2004 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.520.8499 http://polaris.nipr.ac.jp/~uap/apuar/apuar18/PUA1809.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.520.8499 http://polaris.nipr.ac.jp/~uap/apuar/apuar18/PUA1809.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://polaris.nipr.ac.jp/~uap/apuar/apuar18/PUA1809.pdf text 2004 ftciteseerx 2016-01-08T10:07:34Z Abstract: Observations of auroral oxygen ion emission at 732/733 nm were made at the Aurora station in Longyearbyen (78.2°N, 16.3°E; λ m = 74.9°) using an all-sky spec-trograph (ASG) during the winter season of 2000/2001. A statistical analysis showed that the highest occurrence of oxygen ion auroras at Longyearbyen was seen in the dayside of the 09–12 MLT region; the intensities of these auroras were also larger than those on the night side. To study the mechanism of ion upflow in the polar ionosphere, ASG data obtained on December 7, 2000, was analyzed together with simultaneous ionospheric data obtained by EISCAT Svalbard radar (ESR). Enhancements of electron temperature and ion upward velocity were associated with an increase in the auroral OII intensity at the magnetic zenith. This result suggests that an ambipolar electric field associated with elec-tron temperature enhancement caused by soft electron precipitation may be involved in the mechanisms that drive ionospheric ions upward. key words: aurora, oxygen ion, ion upflow, ESR Text EISCAT Longyearbyen Svalbard Unknown Longyearbyen Svalbard |
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Abstract: Observations of auroral oxygen ion emission at 732/733 nm were made at the Aurora station in Longyearbyen (78.2°N, 16.3°E; λ m = 74.9°) using an all-sky spec-trograph (ASG) during the winter season of 2000/2001. A statistical analysis showed that the highest occurrence of oxygen ion auroras at Longyearbyen was seen in the dayside of the 09–12 MLT region; the intensities of these auroras were also larger than those on the night side. To study the mechanism of ion upflow in the polar ionosphere, ASG data obtained on December 7, 2000, was analyzed together with simultaneous ionospheric data obtained by EISCAT Svalbard radar (ESR). Enhancements of electron temperature and ion upward velocity were associated with an increase in the auroral OII intensity at the magnetic zenith. This result suggests that an ambipolar electric field associated with elec-tron temperature enhancement caused by soft electron precipitation may be involved in the mechanisms that drive ionospheric ions upward. key words: aurora, oxygen ion, ion upflow, ESR |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Naoko Koizumi Shoichi Okano Takeshi Sakanoi Makoto Taguchi Takehiko Aso |
spellingShingle |
Naoko Koizumi Shoichi Okano Takeshi Sakanoi Makoto Taguchi Takehiko Aso Research note Auroral O + 732/733 nm emission and its relation to ion upflow |
author_facet |
Naoko Koizumi Shoichi Okano Takeshi Sakanoi Makoto Taguchi Takehiko Aso |
author_sort |
Naoko Koizumi |
title |
Research note Auroral O + 732/733 nm emission and its relation to ion upflow |
title_short |
Research note Auroral O + 732/733 nm emission and its relation to ion upflow |
title_full |
Research note Auroral O + 732/733 nm emission and its relation to ion upflow |
title_fullStr |
Research note Auroral O + 732/733 nm emission and its relation to ion upflow |
title_full_unstemmed |
Research note Auroral O + 732/733 nm emission and its relation to ion upflow |
title_sort |
research note auroral o + 732/733 nm emission and its relation to ion upflow |
publishDate |
2004 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.520.8499 http://polaris.nipr.ac.jp/~uap/apuar/apuar18/PUA1809.pdf |
geographic |
Longyearbyen Svalbard |
geographic_facet |
Longyearbyen Svalbard |
genre |
EISCAT Longyearbyen Svalbard |
genre_facet |
EISCAT Longyearbyen Svalbard |
op_source |
http://polaris.nipr.ac.jp/~uap/apuar/apuar18/PUA1809.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.520.8499 http://polaris.nipr.ac.jp/~uap/apuar/apuar18/PUA1809.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766400329464676352 |