Kelvin-Helmholtz instability in the magnetopause-boundary layer region

Journal Article · Thu Jan 01 04:00:00 EST 1981 · J. Geophys. Res.; (United States)

DOI:https://doi.org/10.1029/JA086iA01p00054· OSTI ID:6439810

Lee, L C; Albano, R K; Kan, J R

The Kelvin-Helmholtz instability in the magnetopause-boundary layer region is studied on the basis of an idealized model which consists of three uniform plasma regions: the magnetosheath, the boundary layer, and the magnetosphere. There are two unstable modes in the magnetopause-boundary layer region: one is excited at the magnetopause (the magnetopause mode) and the other is excited at the inner surface of the boundary layer (the inner mode). The inner mode is found to be unstable most of the time, while the excitation of the magnetopause mode depends on the magnetic field in the magnetosheath. The observed variation of the boundary layer thickness can be attributed to the unstable inner mode. Possible relationships between the Pc 3-5 geomagnetic pulsations and the surface waves excited on the magnetospheric boundary are also discussed.

• Research Organization: Geophysical Institute, University of Alaska, Fairbanks, Alaska 99701
• OSTI ID: 6439810
• Journal Information: J. Geophys. Res.; (United States), Journal Name: J. Geophys. Res.; (United States) Vol. 86:A1; ISSN JGREA
• Country of Publication: United States
• Language: English

Related Subjects

640203* -- Atmospheric Physics-- Magnetospheric Phenomena-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BOUNDARY LAYERS
EARTH ATMOSPHERE
FLUID MECHANICS
HELMHOLTZ INSTABILITY
HYDRODYNAMICS
INSTABILITY
INSTABILITY GROWTH RATES
LAYERS
MAGNETOHYDRODYNAMICS
MAGNETOPAUSE
MAGNETOSHEATH
MAGNETOSPHERE
MECHANICS
ONE-DIMENSIONAL CALCULATIONS
PLASMA INSTABILITY
PLASMA MACROINSTABILITIES
PULSATIONS