A numerical model of the ionosphere, including the E-region above EISCAT
It has been previously demonstrated that a two-ion (O+ and H+) 8-moment time-dependent fluid model was able to reproduce correctly the ionospheric structure in the altitude range probed by the EISCAT-VHF radar. In the present study, the model is extended down to the E-region where molecular ion chem...
Published in: | Annales Geophysicae |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Springer Verlag
1996
|
Subjects: | |
Online Access: | https://doi.org/10.1007/s00585-996-0191-7 https://noa.gwlb.de/receive/cop_mods_00037838 |
id |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00037838 |
---|---|
record_format |
openpolar |
spelling |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00037838 2023-05-15T16:04:29+02:00 A numerical model of the ionosphere, including the E-region above EISCAT Diloy, P.-Y. Robineau, A. Lilensten, J. Blelly, P.-L. Fontanari, J. 1996-02 electronic https://doi.org/10.1007/s00585-996-0191-7 https://noa.gwlb.de/receive/cop_mods_00037838 eng eng Springer Verlag Annales Geophysicae -- http://www.bibliothek.uni-regensburg.de/ezeit/?1458425 -- https://www.ann-geophys.net/ -- https://www.ann-geophys.net/volumes.html -- http://link.springer.com/journal/585 -- 1432-0576 https://doi.org/10.1007/s00585-996-0191-7 https://noa.gwlb.de/receive/cop_mods_00037838 https://open-access.net/ uneingeschränkt info:eu-repo/semantics/restrictedAccess article Verlagsveröffentlichung article Text doc-type:article 1996 ftnonlinearchiv https://doi.org/10.1007/s00585-996-0191-7 2022-02-08T22:43:19Z It has been previously demonstrated that a two-ion (O+ and H+) 8-moment time-dependent fluid model was able to reproduce correctly the ionospheric structure in the altitude range probed by the EISCAT-VHF radar. In the present study, the model is extended down to the E-region where molecular ion chemistry (NO+ and O+2, essentially) prevails over transport; EISCAT-UHF observations confirmed previous theoretical predictions that during events of intense E×B induced convection drifts, molecular ions (mainly NO+) predominate over O+ ions up to altitudes of 300 km. In addition to this extension of the model down to the E-region, the ionization and heating resulting from both solar insolation and particle precipitation is now taken into account in a consistent manner through a complete kinetic transport code. The effects of E×B induced convection drifts on the E- and F-region are presented: the balance between O+ and NO+ ions is drastically affected; the electric field acts to deplete the O+ ion concentration. The [NO+]/[O+] transition altitude varies from 190 km to 320 km as the perpendicular electric field increases from 0 to 100 mV m-1. An interesting additional by-product of the model is that it also predicts the presence of a noticeable fraction of N+ ions in the topside ionosphere in good agreement with Retarding Ion Mass Spectrometer measurements onboard Dynamic Explorer. Article in Journal/Newspaper EISCAT Niedersächsisches Online-Archiv NOA Annales Geophysicae 14 2 191 200 |
institution |
Open Polar |
collection |
Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Diloy, P.-Y. Robineau, A. Lilensten, J. Blelly, P.-L. Fontanari, J. A numerical model of the ionosphere, including the E-region above EISCAT |
topic_facet |
article Verlagsveröffentlichung |
description |
It has been previously demonstrated that a two-ion (O+ and H+) 8-moment time-dependent fluid model was able to reproduce correctly the ionospheric structure in the altitude range probed by the EISCAT-VHF radar. In the present study, the model is extended down to the E-region where molecular ion chemistry (NO+ and O+2, essentially) prevails over transport; EISCAT-UHF observations confirmed previous theoretical predictions that during events of intense E×B induced convection drifts, molecular ions (mainly NO+) predominate over O+ ions up to altitudes of 300 km. In addition to this extension of the model down to the E-region, the ionization and heating resulting from both solar insolation and particle precipitation is now taken into account in a consistent manner through a complete kinetic transport code. The effects of E×B induced convection drifts on the E- and F-region are presented: the balance between O+ and NO+ ions is drastically affected; the electric field acts to deplete the O+ ion concentration. The [NO+]/[O+] transition altitude varies from 190 km to 320 km as the perpendicular electric field increases from 0 to 100 mV m-1. An interesting additional by-product of the model is that it also predicts the presence of a noticeable fraction of N+ ions in the topside ionosphere in good agreement with Retarding Ion Mass Spectrometer measurements onboard Dynamic Explorer. |
format |
Article in Journal/Newspaper |
author |
Diloy, P.-Y. Robineau, A. Lilensten, J. Blelly, P.-L. Fontanari, J. |
author_facet |
Diloy, P.-Y. Robineau, A. Lilensten, J. Blelly, P.-L. Fontanari, J. |
author_sort |
Diloy, P.-Y. |
title |
A numerical model of the ionosphere, including the E-region above EISCAT |
title_short |
A numerical model of the ionosphere, including the E-region above EISCAT |
title_full |
A numerical model of the ionosphere, including the E-region above EISCAT |
title_fullStr |
A numerical model of the ionosphere, including the E-region above EISCAT |
title_full_unstemmed |
A numerical model of the ionosphere, including the E-region above EISCAT |
title_sort |
numerical model of the ionosphere, including the e-region above eiscat |
publisher |
Springer Verlag |
publishDate |
1996 |
url |
https://doi.org/10.1007/s00585-996-0191-7 https://noa.gwlb.de/receive/cop_mods_00037838 |
genre |
EISCAT |
genre_facet |
EISCAT |
op_relation |
Annales Geophysicae -- http://www.bibliothek.uni-regensburg.de/ezeit/?1458425 -- https://www.ann-geophys.net/ -- https://www.ann-geophys.net/volumes.html -- http://link.springer.com/journal/585 -- 1432-0576 https://doi.org/10.1007/s00585-996-0191-7 https://noa.gwlb.de/receive/cop_mods_00037838 |
op_rights |
https://open-access.net/ uneingeschränkt info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1007/s00585-996-0191-7 |
container_title |
Annales Geophysicae |
container_volume |
14 |
container_issue |
2 |
container_start_page |
191 |
op_container_end_page |
200 |
_version_ |
1766400072965160960 |