Diffusion processes in the magnetopause boundary layer

Details Diffusion processes in the magnetopause boundary layer Diffusion processes in the magnetopause boundary layer

Nov 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982georl...9.1247t&link_type=abstract

Geophysical Research Letters, vol. 9, Nov. 1982, p. 1247-1250.

Physics

88

Atmospheric Diffusion, Boundary Layers, Magnetopause, Plasma Diffusion, Crossed Fields, Electron Diffusion, Ionic Diffusion, Magnetosheath, Space Plasmas

Scientific paper

A quantitative estimate is calculated for the effect of wave-particle scattering on the structure of the magnetopause boundary layer. It is assumed that large cross-B electric fields are absent in the observed penetration of magnetosheath plasma into the magnetopause boundary layer, thus allowing for cross-field transport comparable to 10% of the Bohm diffusion. It is shown that magnetosheath ions, resonant with low frequency electrostatic waves, can account for the typical boundary layer thickness when transported at 10% of the diffusion rate 1000 sq km/sec. The conditions are required to occur at all local times and under all interplanetary conditions. Significant mass and momentum transfer are then possible across the magnetopause when field merging is not occurring.

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