Contribution of Bursty Bulk Flows to the Global Dipolarization of the Magnetotail During an Isolated Substorm.

ABSTRACT: This paper addresses the question of the contribution of azimuthally localized flow channels and magnetic field dipolarizations embedded in them in the global dipolarization of the inner magnetosphere during substorms. We employ the high-resolution Lyon-Fedder-Mobarry global magnetosphere magnetohydrodynamic model and simulate an isolated substorm event, which was observed by the geostationary satellites and by the Magnetospheric Multiscale spacecraft. The results of our simulations reveal that plasma sheet flow channels (bursty bulk flows, BBFs) and elementary dipolarizations (dipolarization fronts, DFs) occur in the growth phase of the substorm but are rare and do not penetrate to the geosynchronous orbit. The substorm onset is characterized by an abrupt increase in the occurrence and in

SUBMITTER: Merkin VG 

PROVIDER: S-EPMC7066714 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature