Analysis of early phase ring current recovery mechanisms during geomagnetic storms

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 drif...

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Published inGeophysical research letters Vol. 26; no. 18; pp. 2845 - 2848
Main Authors Liemohn, M. W., Kozyra, J. U., Jordanova, V. K., Khazanov, G. V., Thomsen, M. F., Cayton, T. E.
Format Journal Article
LanguageEnglish
Published Washington, DC Blackwell Publishing Ltd 15.09.1999
American Geophysical Union
Subjects
Decay rate
Earth, ocean, space
Exact sciences and technology
External geophysics
Geomagnetism
Geophysics
Magnetopause
Marine
Physics of the magnetosphere
Recovery
Ring currents
Solar maximum
Storms
Trapped particles
Solar activity
Kinetic model
Magnetic storm
Ring current
Magnetosphere
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Summary: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.
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ISSN:0094-8276
1944-8007
DOI:10.1029/1999GL900611