On the ionospheric and thermospheric footprint of the polar cusp
International audience At the footprint of the polar cusp, the ionosphere and the thermosphere are strongly affected by the combination of intense precipitation of magnetosheath particles and strong convection electric fields. In particular, incoherent radar observations indicate that the electron d...
Main Author: | |
---|---|
Other Authors: | , |
Format: | Conference Object |
Language: | English |
Published: |
HAL CCSD
2007
|
Subjects: | |
Online Access: | https://insu.hal.science/insu-00366030 |
id |
ftunigrenoble:oai:HAL:insu-00366030v1 |
---|---|
record_format |
openpolar |
spelling |
ftunigrenoble:oai:HAL:insu-00366030v1 2024-05-12T08:04:35+00:00 On the ionospheric and thermospheric footprint of the polar cusp Pitout, Frederic Laboratoire de Planétologie de Grenoble (LPG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Kangerlussuaq, Greenland 2007-05-04 https://insu.hal.science/insu-00366030 en eng HAL CCSD insu-00366030 https://insu.hal.science/insu-00366030 Greenland IPY 2007 Space Science Symposium https://insu.hal.science/insu-00366030 Greenland IPY 2007 Space Science Symposium, May 2007, Kangerlussuaq, Greenland info:eu-repo/semantics/conferenceObject Conference papers 2007 ftunigrenoble 2024-04-18T03:06:21Z International audience At the footprint of the polar cusp, the ionosphere and the thermosphere are strongly affected by the combination of intense precipitation of magnetosheath particles and strong convection electric fields. In particular, incoherent radar observations indicate that the electron density may decrease significantly in the cusp ionosphere, despite the intense precipitation of low-energy electrons. In order to understand the physics and the chemistry of these regions, we have modelled the ionospheric footprints of the cusp and mantle regions, and we focus on the two rival processes acting pro and con the electron density build-up. We investigate various combinations of E-field and initial electron densities and their roles on the local ionosphere and thermosphere. Our simulations clearly show that the overall result depends on the origin of the flux tube, which eventually opens in the cusp region. We interpret our results in terms of seasonal effects, IMF-By and MLT dependences. Conference Object Greenland Kangerlussuaq Université Grenoble Alpes: HAL Greenland Kangerlussuaq ENVELOPE(-55.633,-55.633,72.633,72.633) |
institution |
Open Polar |
collection |
Université Grenoble Alpes: HAL |
op_collection_id |
ftunigrenoble |
language |
English |
description |
International audience At the footprint of the polar cusp, the ionosphere and the thermosphere are strongly affected by the combination of intense precipitation of magnetosheath particles and strong convection electric fields. In particular, incoherent radar observations indicate that the electron density may decrease significantly in the cusp ionosphere, despite the intense precipitation of low-energy electrons. In order to understand the physics and the chemistry of these regions, we have modelled the ionospheric footprints of the cusp and mantle regions, and we focus on the two rival processes acting pro and con the electron density build-up. We investigate various combinations of E-field and initial electron densities and their roles on the local ionosphere and thermosphere. Our simulations clearly show that the overall result depends on the origin of the flux tube, which eventually opens in the cusp region. We interpret our results in terms of seasonal effects, IMF-By and MLT dependences. |
author2 |
Laboratoire de Planétologie de Grenoble (LPG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Conference Object |
author |
Pitout, Frederic |
spellingShingle |
Pitout, Frederic On the ionospheric and thermospheric footprint of the polar cusp |
author_facet |
Pitout, Frederic |
author_sort |
Pitout, Frederic |
title |
On the ionospheric and thermospheric footprint of the polar cusp |
title_short |
On the ionospheric and thermospheric footprint of the polar cusp |
title_full |
On the ionospheric and thermospheric footprint of the polar cusp |
title_fullStr |
On the ionospheric and thermospheric footprint of the polar cusp |
title_full_unstemmed |
On the ionospheric and thermospheric footprint of the polar cusp |
title_sort |
on the ionospheric and thermospheric footprint of the polar cusp |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://insu.hal.science/insu-00366030 |
op_coverage |
Kangerlussuaq, Greenland |
long_lat |
ENVELOPE(-55.633,-55.633,72.633,72.633) |
geographic |
Greenland Kangerlussuaq |
geographic_facet |
Greenland Kangerlussuaq |
genre |
Greenland Kangerlussuaq |
genre_facet |
Greenland Kangerlussuaq |
op_source |
Greenland IPY 2007 Space Science Symposium https://insu.hal.science/insu-00366030 Greenland IPY 2007 Space Science Symposium, May 2007, Kangerlussuaq, Greenland |
op_relation |
insu-00366030 https://insu.hal.science/insu-00366030 |
_version_ |
1798846797381107712 |