Magnetopause Kelvin-Helmholtz instability

Details Magnetopause Kelvin-Helmholtz instability Magnetopause Kelvin-Helmholtz instability

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979esasp.148..357s&link_type=abstract

In ESA Magnetospheric Boundary Layers p 357-364 (SEE N80-13529 04-42)

Physics

4

Boundary Layer Plasmas, Kelvin-Helmholtz Instability, Magnetopause, Geomagnetism, International Sun Earth Explorer 1, International Sun Earth Explorer 2, Mass Transfer, Momentum Transfer, Plasma Turbulence, Surface Waves

Scientific paper

The Kelvin-Helmholtz instability as it applies to the dayside magnetopause is reviewed. Simple theory suggests the boundary should generally be unstable to waves moving at a large angle to the Earth's field. Nonlinear effects, how amplitudes might be limited, and what dynamic role the instability could have in boundary regions in stimulating mass and momentum transfer are discussed. Examination of data from a particular ISEE spacecraft pass shows relatively small amplitude (750 km) waves present on the boundary. Corresponding wavelength estimates show wave momentum is not significant at the time of the pass.

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