Unpublished conference/Abstract (Scientific congresses and symposiums)
Trapped Population Response During Geomagnetic Auroral Super Storms
Matar, Jessy; Hubert, Benoît; Yao, Zhonghua
2019ESWW 2019
Editorial reviewed
 

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Abstract :
[en] The radiation belts have a more pronounced response to global disturbances of the magnetospheric system during geomagnetic super storms. Those are characterized as prolonged periods of high magnetic activity and identified by several indices, such as the Dst index. The magnetospheric current system is enhanced during storms and causes consequential variations in the Earth’s magnetic field, thus producing a surface electric field. We study two super storms, on August 2000 and April 2001 for which the distribution of the helium ion (He+) population in the plasmasphere defined as the torus of cold dense plasma surrounding the Earth in the inner magnetosphere is imaged using the extreme ultraviolet (EUV) instrument on board the NASA-IMAGE spacecraft. We aim to analyze the variation of the He+ density in the plasmasphere during those storms and we search for enhancements in the He+ density budget. We determine the plasmapause location and map it to ionospheric altitude along the magnetic field lines. The ionospheric context is then studied in terms of auroral precipitation using FUV imaging of the electron and proton aurora at higher latitude. The electric field is also considered using measurements of the ionospheric convection from the SuperDARN radar network and using DMSP crossings of that region.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Matar, Jessy ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Hubert, Benoît  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Yao, Zhonghua ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Language :
English
Title :
Trapped Population Response During Geomagnetic Auroral Super Storms
Publication date :
22 November 2019
Event name :
ESWW 2019
Event place :
Liège, Belgium
Event date :
November 2019
Audience :
International
Peer reviewed :
Editorial reviewed
Available on ORBi :
since 07 April 2021

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