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...
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ftunivalberta:oai:era.library.ualberta.ca:e4ef0e4b-5a88-4f7c-840f-b369b36ef185 2023-05-15T16:04:23+02:00 Enhanced N2 and O2 densities inferred from EISCAT observations of Pc5 waves and associated electron precipitation Yau, Andrew W. Sydorenko, Dmytro Rankin, Robert 2016 https://era.library.ualberta.ca/items/e4ef0e4b-5a88-4f7c-840f-b369b36ef185 https://doi.org/10.7939/R31R6NF54 English eng https://era.library.ualberta.ca/items/e4ef0e4b-5a88-4f7c-840f-b369b36ef185 doi:10.7939/R31R6NF54 © 2016 American Geophysical Union. This version of this article is open access and can be downloaded and shared. The original author(s) and source must be cited. Nitrogen Oxygen Ionosphere Eiscat Modelling Recombination Article (Published) 2016 ftunivalberta https://doi.org/10.7939/R31R6NF54 2022-08-22T20:14:32Z 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. Other/Unknown Material EISCAT University of Alberta: Era - Education and Research Archive |
institution |
Open Polar |
collection |
University of Alberta: Era - Education and Research Archive |
op_collection_id |
ftunivalberta |
language |
English |
topic |
Nitrogen Oxygen Ionosphere Eiscat Modelling Recombination |
spellingShingle |
Nitrogen Oxygen Ionosphere Eiscat Modelling Recombination Yau, Andrew W. Sydorenko, Dmytro Rankin, Robert Enhanced N2 and O2 densities inferred from EISCAT observations of Pc5 waves and associated electron precipitation |
topic_facet |
Nitrogen Oxygen Ionosphere Eiscat Modelling Recombination |
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 |
Other/Unknown Material |
author |
Yau, Andrew W. Sydorenko, Dmytro Rankin, Robert |
author_facet |
Yau, Andrew W. Sydorenko, Dmytro Rankin, Robert |
author_sort |
Yau, Andrew W. |
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 |
publishDate |
2016 |
url |
https://era.library.ualberta.ca/items/e4ef0e4b-5a88-4f7c-840f-b369b36ef185 https://doi.org/10.7939/R31R6NF54 |
genre |
EISCAT |
genre_facet |
EISCAT |
op_relation |
https://era.library.ualberta.ca/items/e4ef0e4b-5a88-4f7c-840f-b369b36ef185 doi:10.7939/R31R6NF54 |
op_rights |
© 2016 American Geophysical Union. This version of this article is open access and can be downloaded and shared. The original author(s) and source must be cited. |
op_doi |
https://doi.org/10.7939/R31R6NF54 |
_version_ |
1766400021021851648 |