Premium
Thin current sheet evolution as seen in observations, empirical models and MHD simulations
Author(s) -
Pulkkinen T. I.,
Wiltberger M.
Publication year - 2000
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/1999gl003726
Subject(s) - substorm , magnetohydrodynamics , current sheet , current (fluid) , breakup , physics , magnetic field , geophysics , flow (mathematics) , mechanics , computational physics , geology , magnetosphere , quantum mechanics , thermodynamics
The inner and midtail current sheet is examined during a substorm on Dec 10, 1996 using multispacecraft observations, empirical models, and global MHD simulations. Both the simulation and empirical magnetic field model show good agreement with observations, which substantially increases the confidence in both methods. Both locate the thin current sheet inner edge at ∼7 R E , and give a scale size of ∼15 R E in tailward and cross‐tail directions. The MHD simulation confirms the empirical model result that the thin current sheet remained stable after a local auroral breakup and indicates that the activity followed from flow channels generated at ∼40 R E independent of the thin current sheet evolution closer to the Earth.