Links of the Plasmapause With Other Boundary Layers of the Magnetosphere: Ionospheric Convection, Radiation Belt Boundaries, Auroral Oval

The plasmapause marks the limit of the plasmasphere and is characterized by a sudden change in plasma density. This can influence the other regions of the magnetosphere, including due to different waves circulating inside and outside the plasmasphere. In the present work, we first compare the positi...

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Autores principales:	V. Pierrard, E. Botek, J.-F. Ripoll, S. A. Thaller, M. B. Moldwin, M. Ruohoniemi, G. Reeves
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	plasmapause ionospheric convection radiation belts auroral oval boundaries magnetosphere Astronomy QB1-991 Geophysics. Cosmic physics QC801-809
Acceso en línea:	https://doaj.org/article/64e7b128523c4abdaa02602f8a0a5cc9
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spelling	oai:doaj.org-article:64e7b128523c4abdaa02602f8a0a5cc92021-11-05T13:05:21ZLinks of the Plasmapause With Other Boundary Layers of the Magnetosphere: Ionospheric Convection, Radiation Belt Boundaries, Auroral Oval2296-987X10.3389/fspas.2021.728531https://doaj.org/article/64e7b128523c4abdaa02602f8a0a5cc92021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fspas.2021.728531/fullhttps://doaj.org/toc/2296-987XThe plasmapause marks the limit of the plasmasphere and is characterized by a sudden change in plasma density. This can influence the other regions of the magnetosphere, including due to different waves circulating inside and outside the plasmasphere. In the present work, we first compare the positions of the plasmapause measured by the NASA Van Allen Probes in 2015 with those of the Space Weather Integrated Forecasting Framework plasmasphere model (SPM). Using the Van Allen Probes and other satellite observations like PROBA-V, we investigate the links that can exist with the radiation belt boundaries. The inward motion of the outer radiation belt associated with sudden flux enhancements of energetic electrons can indeed be directly related to the plasmapause erosion during geomagnetic storms, suggesting possible links. Moreover, the position of the plasmapause projected in the ionosphere is compared with the ionospheric convection boundary. The equatorward motion of the plasmapause projected in the ionosphere is related to the equatorward edge motion of the auroral oval that goes to lower latitudes during storms due to the geomagnetic perturbation, like the low altitude plasmapause and the outer radiation belt. The links between these different regions are investigated during quiet periods, for which the plasmasphere is widely extended, as well as during geomagnetic storms for which plumes are generated, and then afterwards rotates with the plasmasphere. The magnetic local time dependence of these boundaries is especially studied on March 14, 2014 after a sudden northward turning of the interplanetary magnetic field (IMF) and for the geomagnetic storm of August 26, 2018, showing the importance of the magnetic field topology and of the convection electric field in the interactions between these different regions eventually leading to the coupling between magnetosphere and ionosphere.V. PierrardV. PierrardE. BotekJ.-F. RipollJ.-F. RipollS. A. ThallerM. B. MoldwinM. RuohoniemiG. ReevesFrontiers Media S.A.articleplasmapauseionospheric convectionradiation beltsauroral ovalboundariesmagnetosphereAstronomyQB1-991Geophysics. Cosmic physicsQC801-809ENFrontiers in Astronomy and Space Sciences, Vol 8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	plasmapause ionospheric convection radiation belts auroral oval boundaries magnetosphere Astronomy QB1-991 Geophysics. Cosmic physics QC801-809
spellingShingle	plasmapause ionospheric convection radiation belts auroral oval boundaries magnetosphere Astronomy QB1-991 Geophysics. Cosmic physics QC801-809 V. Pierrard V. Pierrard E. Botek J.-F. Ripoll J.-F. Ripoll S. A. Thaller M. B. Moldwin M. Ruohoniemi G. Reeves Links of the Plasmapause With Other Boundary Layers of the Magnetosphere: Ionospheric Convection, Radiation Belt Boundaries, Auroral Oval
description	The plasmapause marks the limit of the plasmasphere and is characterized by a sudden change in plasma density. This can influence the other regions of the magnetosphere, including due to different waves circulating inside and outside the plasmasphere. In the present work, we first compare the positions of the plasmapause measured by the NASA Van Allen Probes in 2015 with those of the Space Weather Integrated Forecasting Framework plasmasphere model (SPM). Using the Van Allen Probes and other satellite observations like PROBA-V, we investigate the links that can exist with the radiation belt boundaries. The inward motion of the outer radiation belt associated with sudden flux enhancements of energetic electrons can indeed be directly related to the plasmapause erosion during geomagnetic storms, suggesting possible links. Moreover, the position of the plasmapause projected in the ionosphere is compared with the ionospheric convection boundary. The equatorward motion of the plasmapause projected in the ionosphere is related to the equatorward edge motion of the auroral oval that goes to lower latitudes during storms due to the geomagnetic perturbation, like the low altitude plasmapause and the outer radiation belt. The links between these different regions are investigated during quiet periods, for which the plasmasphere is widely extended, as well as during geomagnetic storms for which plumes are generated, and then afterwards rotates with the plasmasphere. The magnetic local time dependence of these boundaries is especially studied on March 14, 2014 after a sudden northward turning of the interplanetary magnetic field (IMF) and for the geomagnetic storm of August 26, 2018, showing the importance of the magnetic field topology and of the convection electric field in the interactions between these different regions eventually leading to the coupling between magnetosphere and ionosphere.
format	article
author	V. Pierrard V. Pierrard E. Botek J.-F. Ripoll J.-F. Ripoll S. A. Thaller M. B. Moldwin M. Ruohoniemi G. Reeves
author_facet	V. Pierrard V. Pierrard E. Botek J.-F. Ripoll J.-F. Ripoll S. A. Thaller M. B. Moldwin M. Ruohoniemi G. Reeves
author_sort	V. Pierrard
title	Links of the Plasmapause With Other Boundary Layers of the Magnetosphere: Ionospheric Convection, Radiation Belt Boundaries, Auroral Oval
title_short	Links of the Plasmapause With Other Boundary Layers of the Magnetosphere: Ionospheric Convection, Radiation Belt Boundaries, Auroral Oval
title_full	Links of the Plasmapause With Other Boundary Layers of the Magnetosphere: Ionospheric Convection, Radiation Belt Boundaries, Auroral Oval
title_fullStr	Links of the Plasmapause With Other Boundary Layers of the Magnetosphere: Ionospheric Convection, Radiation Belt Boundaries, Auroral Oval
title_full_unstemmed	Links of the Plasmapause With Other Boundary Layers of the Magnetosphere: Ionospheric Convection, Radiation Belt Boundaries, Auroral Oval
title_sort	links of the plasmapause with other boundary layers of the magnetosphere: ionospheric convection, radiation belt boundaries, auroral oval
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/64e7b128523c4abdaa02602f8a0a5cc9
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Links of the Plasmapause With Other Boundary Layers of the Magnetosphere: Ionospheric Convection, Radiation Belt Boundaries, Auroral Oval

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