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Analysis of early phase ring current recovery mechanisms during geomagnetic storms
Author(s) -
Liemohn M. W.,
Kozyra J. U.,
Jordanova V. K.,
Khazanov G. V.,
Thomsen M. F.,
Cayton T. E.
Publication year - 1999
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 - 10.1029/1999gl900611
Subject(s) - ring current , geomagnetic storm , outflow , storm , magnetopause , current (fluid) , atmospheric sciences , convection , geophysics , environmental science , earth's magnetic field , geology , physics , magnetosphere , meteorology , magnetic field , nuclear physics , plasma , oceanography , quantum mechanics
A time‐dependent kinetic model is used to investigate the relative importance of various mechanisms in the early phase decay rate of the ring current. It is found that, for both the solar maximum storm of June 4–7, 1991 and especially the solar minimum storm of September 24–27, 1998, convective drift loss out the dayside magnetopause is the dominant process in removing ring current particles during the initial recovery. During the 1998 storm, dayside outflow losses outpaced charge exchange losses by a factor of ten.