Enhanced N2 and O2 densities inferred from EISCAT observations of Pc5 waves and associated electron precipitation
An advanced two-dimensional numerical model of the coupled ionosphere and magnetosphere is used to analyze EISCAT observations of ULF waves that are accompanied by electron precipitation with a wide energy spectrum. The observations show columns of significantly enhanced electron density produced by...
Published in: | Journal of Geophysical Research: Space Physics |
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Language: | English |
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University of Alberta
2016
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Online Access: | https://era.library.ualberta.ca/items/da4445d5-1ce5-4043-8968-6e11e025fbc2 https://doi.org/10.1002/2015JA021508 |
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fttriple:oai:gotriple.eu:10670/1.9gy3a8 2023-05-15T16:04:31+02:00 Enhanced N2 and O2 densities inferred from EISCAT observations of Pc5 waves and associated electron precipitation Sydorenko, Dmytro Rankin, Robert Yau, Andrew W. 2016-01-01 https://era.library.ualberta.ca/items/da4445d5-1ce5-4043-8968-6e11e025fbc2 https://doi.org/10.1002/2015JA021508 en eng University of Alberta 10670/1.9gy3a8 https://era.library.ualberta.ca/items/da4445d5-1ce5-4043-8968-6e11e025fbc2 http://doi.org/10.1002/2015JA021508 other ERA : Education and Research Archive geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2016 fttriple https://doi.org/10.1002/2015JA021508 2023-01-22T17:37:46Z An advanced two-dimensional numerical model of the coupled ionosphere and magnetosphere is used to analyze EISCAT observations of ULF waves that are accompanied by electron precipitation with a wide energy spectrum. The observations show columns of significantly enhanced electron density produced by pulsating precipitation at altitudes between 150 km and 300 km. After each precipitation pulse, the plasma density returns to its initial value within 2 min. Simulations reveal that such a high-density decay rate cannot be reproduced with the composition of neutrals corresponding to a quiet time provided by the Mass Spectrometer Incoherent Scatter model. To explain the rapid density decay rate using the model of the coupled ionosphere and magnetosphere, the density of nitrogen and oxygen molecules was increased, while the density of oxygen atoms was decreased. The modified neutral densities improved not only the decay rate but also the altitude profile of plasma density which had no F2 layer maximum before the wave and the pulsating precipitation started. Article in Journal/Newspaper EISCAT Unknown Journal of Geophysical Research: Space Physics 121 1 549 566 |
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geo envir Sydorenko, Dmytro Rankin, Robert Yau, Andrew W. Enhanced N2 and O2 densities inferred from EISCAT observations of Pc5 waves and associated electron precipitation |
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geo envir |
description |
An advanced two-dimensional numerical model of the coupled ionosphere and magnetosphere is used to analyze EISCAT observations of ULF waves that are accompanied by electron precipitation with a wide energy spectrum. The observations show columns of significantly enhanced electron density produced by pulsating precipitation at altitudes between 150 km and 300 km. After each precipitation pulse, the plasma density returns to its initial value within 2 min. Simulations reveal that such a high-density decay rate cannot be reproduced with the composition of neutrals corresponding to a quiet time provided by the Mass Spectrometer Incoherent Scatter model. To explain the rapid density decay rate using the model of the coupled ionosphere and magnetosphere, the density of nitrogen and oxygen molecules was increased, while the density of oxygen atoms was decreased. The modified neutral densities improved not only the decay rate but also the altitude profile of plasma density which had no F2 layer maximum before the wave and the pulsating precipitation started. |
format |
Article in Journal/Newspaper |
author |
Sydorenko, Dmytro Rankin, Robert Yau, Andrew W. |
author_facet |
Sydorenko, Dmytro Rankin, Robert Yau, Andrew W. |
author_sort |
Sydorenko, Dmytro |
title |
Enhanced N2 and O2 densities inferred from EISCAT observations of Pc5 waves and associated electron precipitation |
title_short |
Enhanced N2 and O2 densities inferred from EISCAT observations of Pc5 waves and associated electron precipitation |
title_full |
Enhanced N2 and O2 densities inferred from EISCAT observations of Pc5 waves and associated electron precipitation |
title_fullStr |
Enhanced N2 and O2 densities inferred from EISCAT observations of Pc5 waves and associated electron precipitation |
title_full_unstemmed |
Enhanced N2 and O2 densities inferred from EISCAT observations of Pc5 waves and associated electron precipitation |
title_sort |
enhanced n2 and o2 densities inferred from eiscat observations of pc5 waves and associated electron precipitation |
publisher |
University of Alberta |
publishDate |
2016 |
url |
https://era.library.ualberta.ca/items/da4445d5-1ce5-4043-8968-6e11e025fbc2 https://doi.org/10.1002/2015JA021508 |
genre |
EISCAT |
genre_facet |
EISCAT |
op_source |
ERA : Education and Research Archive |
op_relation |
10670/1.9gy3a8 https://era.library.ualberta.ca/items/da4445d5-1ce5-4043-8968-6e11e025fbc2 http://doi.org/10.1002/2015JA021508 |
op_rights |
other |
op_doi |
https://doi.org/10.1002/2015JA021508 |
container_title |
Journal of Geophysical Research: Space Physics |
container_volume |
121 |
container_issue |
1 |
container_start_page |
549 |
op_container_end_page |
566 |
_version_ |
1766400102936608768 |