IPIM Modeling of the Ionospheric F 2 Layer Depletion at High Latitudes During a High-Speed Stream Event
International audience Our aim is to understand the effect of high-speed stream events on the high-latitude ionosphere and more specifically the decrease of the f o F 2 frequency during the entire day following the impact. First, we have selected one summertime event, for which a large data set was...
Published in: | Journal of Geophysical Research: Space Physics |
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Main Authors: | , , , , , |
Other Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2018
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Online Access: | https://hal.archives-ouvertes.fr/hal-02321970 https://hal.archives-ouvertes.fr/hal-02321970/document https://hal.archives-ouvertes.fr/hal-02321970/file/Marchaudon_et_al-2018-Journal_of_Geophysical_Research%253A_Space_Physics.pdf https://doi.org/10.1029/2018JA025744 |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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language |
English |
topic |
[SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP] |
spellingShingle |
[SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP] Marchaudon, A. Blelly, P.-L. Grandin, M. Aikio, A. Kozlovsky, A. Virtanen, I. IPIM Modeling of the Ionospheric F 2 Layer Depletion at High Latitudes During a High-Speed Stream Event |
topic_facet |
[SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP] |
description |
International audience Our aim is to understand the effect of high-speed stream events on the high-latitude ionosphere and more specifically the decrease of the f o F 2 frequency during the entire day following the impact. First, we have selected one summertime event, for which a large data set was available: Super Dual Auroral Radar Network (SuperDARN) and European Incoherent SCATter (EISCAT) radars, Tromsø and Sodankylä ionosondes, and the CHAllenging Minisatellite Payload (CHAMP) satellite. We modeled with the IPIM model (IRAP Plasmasphere Ionosphere Model) the dynamics of the ionosphere at Tromsø and Sodankylä using inputs derived from the data. The simulations nicely match the measurements made by the EISCAT radar and the ionosondes, and we showed that the decrease of f o F 2 is associated with a transition from F 2 to F 1 layer resulting from a decrease of neutral atomic oxygen concentration. Modeling showed that electrodynamics can explain short-term behavior on the scale of a few hours, but long-term behavior on the scale of a few days results from the perturbation induced in the atmosphere. Enhancement of convection is responsible for a sharp increase of the ion temperature by Joule heating, leading through chemistry to an immediate reduction of the F 2 layer. Then, ion drag on neutrals is responsible for a rapid heating and expansion of the thermosphere. This expansion affects atomic oxygen through nonthermal upward flow, which results in a decrease of its concentration and amplifies the decrease of [O]/[N 2 ] ratio. This thermospheric change explains long-term extinction of the F 2 layer. |
author2 |
Institut de recherche en astrophysique et planétologie (IRAP) Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP) Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS) University of Helsinki University of Oulu Sodankylä Geophysical Observatory |
format |
Article in Journal/Newspaper |
author |
Marchaudon, A. Blelly, P.-L. Grandin, M. Aikio, A. Kozlovsky, A. Virtanen, I. |
author_facet |
Marchaudon, A. Blelly, P.-L. Grandin, M. Aikio, A. Kozlovsky, A. Virtanen, I. |
author_sort |
Marchaudon, A. |
title |
IPIM Modeling of the Ionospheric F 2 Layer Depletion at High Latitudes During a High-Speed Stream Event |
title_short |
IPIM Modeling of the Ionospheric F 2 Layer Depletion at High Latitudes During a High-Speed Stream Event |
title_full |
IPIM Modeling of the Ionospheric F 2 Layer Depletion at High Latitudes During a High-Speed Stream Event |
title_fullStr |
IPIM Modeling of the Ionospheric F 2 Layer Depletion at High Latitudes During a High-Speed Stream Event |
title_full_unstemmed |
IPIM Modeling of the Ionospheric F 2 Layer Depletion at High Latitudes During a High-Speed Stream Event |
title_sort |
ipim modeling of the ionospheric f 2 layer depletion at high latitudes during a high-speed stream event |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.archives-ouvertes.fr/hal-02321970 https://hal.archives-ouvertes.fr/hal-02321970/document https://hal.archives-ouvertes.fr/hal-02321970/file/Marchaudon_et_al-2018-Journal_of_Geophysical_Research%253A_Space_Physics.pdf https://doi.org/10.1029/2018JA025744 |
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ENVELOPE(26.600,26.600,67.417,67.417) |
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Sodankylä Tromsø |
geographic_facet |
Sodankylä Tromsø |
genre |
EISCAT Sodankylä Tromsø |
genre_facet |
EISCAT Sodankylä Tromsø |
op_source |
ISSN: 2169-9380 EISSN: 2169-9402 Journal of Geophysical Research Space Physics https://hal.archives-ouvertes.fr/hal-02321970 Journal of Geophysical Research Space Physics, American Geophysical Union/Wiley, 2018, 123 (8), pp.7051-7066. ⟨10.1029/2018JA025744⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2018JA025744 hal-02321970 https://hal.archives-ouvertes.fr/hal-02321970 https://hal.archives-ouvertes.fr/hal-02321970/document https://hal.archives-ouvertes.fr/hal-02321970/file/Marchaudon_et_al-2018-Journal_of_Geophysical_Research%253A_Space_Physics.pdf doi:10.1029/2018JA025744 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2018JA025744 |
container_title |
Journal of Geophysical Research: Space Physics |
container_volume |
123 |
container_issue |
8 |
container_start_page |
7051 |
op_container_end_page |
7066 |
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1766400219907358720 |
spelling |
ftccsdartic:oai:HAL:hal-02321970v1 2023-05-15T16:04:37+02:00 IPIM Modeling of the Ionospheric F 2 Layer Depletion at High Latitudes During a High-Speed Stream Event Marchaudon, A. Blelly, P.-L. Grandin, M. Aikio, A. Kozlovsky, A. Virtanen, I. Institut de recherche en astrophysique et planétologie (IRAP) Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP) Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS) University of Helsinki University of Oulu Sodankylä Geophysical Observatory 2018-08 https://hal.archives-ouvertes.fr/hal-02321970 https://hal.archives-ouvertes.fr/hal-02321970/document https://hal.archives-ouvertes.fr/hal-02321970/file/Marchaudon_et_al-2018-Journal_of_Geophysical_Research%253A_Space_Physics.pdf https://doi.org/10.1029/2018JA025744 en eng HAL CCSD American Geophysical Union/Wiley info:eu-repo/semantics/altIdentifier/doi/10.1029/2018JA025744 hal-02321970 https://hal.archives-ouvertes.fr/hal-02321970 https://hal.archives-ouvertes.fr/hal-02321970/document https://hal.archives-ouvertes.fr/hal-02321970/file/Marchaudon_et_al-2018-Journal_of_Geophysical_Research%253A_Space_Physics.pdf doi:10.1029/2018JA025744 info:eu-repo/semantics/OpenAccess ISSN: 2169-9380 EISSN: 2169-9402 Journal of Geophysical Research Space Physics https://hal.archives-ouvertes.fr/hal-02321970 Journal of Geophysical Research Space Physics, American Geophysical Union/Wiley, 2018, 123 (8), pp.7051-7066. ⟨10.1029/2018JA025744⟩ [SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP] info:eu-repo/semantics/article Journal articles 2018 ftccsdartic https://doi.org/10.1029/2018JA025744 2021-11-07T01:36:23Z International audience Our aim is to understand the effect of high-speed stream events on the high-latitude ionosphere and more specifically the decrease of the f o F 2 frequency during the entire day following the impact. First, we have selected one summertime event, for which a large data set was available: Super Dual Auroral Radar Network (SuperDARN) and European Incoherent SCATter (EISCAT) radars, Tromsø and Sodankylä ionosondes, and the CHAllenging Minisatellite Payload (CHAMP) satellite. We modeled with the IPIM model (IRAP Plasmasphere Ionosphere Model) the dynamics of the ionosphere at Tromsø and Sodankylä using inputs derived from the data. The simulations nicely match the measurements made by the EISCAT radar and the ionosondes, and we showed that the decrease of f o F 2 is associated with a transition from F 2 to F 1 layer resulting from a decrease of neutral atomic oxygen concentration. Modeling showed that electrodynamics can explain short-term behavior on the scale of a few hours, but long-term behavior on the scale of a few days results from the perturbation induced in the atmosphere. Enhancement of convection is responsible for a sharp increase of the ion temperature by Joule heating, leading through chemistry to an immediate reduction of the F 2 layer. Then, ion drag on neutrals is responsible for a rapid heating and expansion of the thermosphere. This expansion affects atomic oxygen through nonthermal upward flow, which results in a decrease of its concentration and amplifies the decrease of [O]/[N 2 ] ratio. This thermospheric change explains long-term extinction of the F 2 layer. Article in Journal/Newspaper EISCAT Sodankylä Tromsø Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Sodankylä ENVELOPE(26.600,26.600,67.417,67.417) Tromsø Journal of Geophysical Research: Space Physics 123 8 7051 7066 |