Interpretation of magnetic field perturbations in the earth's magnetopause boundary layers

Details Interpretation of magnetic field perturbations in the earth's magnetopause boundary layers Interpretation of magnetic field perturbations in the earth's magnetopause boundary layers

Nov 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983p%26ss...31.1237c&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 31, Nov. 1983, p. 1237-1258. Sponsorship: Science and Engineering Research Co

Computer Science

34

Boundary Layers, Earth Magnetosphere, Geomagnetism, Magnetic Disturbances, Magnetohydrodynamic Flow, Space Plasmas, International Sun Earth Explorers, Magnetic Field Configurations, Plasma Diffusion

Scientific paper

The boundary-region magnetic-field and plasma parameters predicted by proposed diffusion and reconnection models of magnetosphere/solar-wind interaction are compared in the light of published ISEE observations. The models are characterized in detail, differentiating equatorial and high-latitude reconnection, and illustrated with diagrams. It is found that the two types of models predict qualitatively similar responses in the super-Alfvenic flank regions of the magnetosphere, but that different flow configurations are predicted in the sub-Alfvenic dayside region. Flow reversals across certain quadrants of the magnetopause, related to the Svalgaard-Mansurov effect, are unique to reconnection models, which also predict that boundary-layer fields on the dayside will tilt toward the field on the opposite side of the boundary. Observations of this 'toward' tilting are presented and analyzed, and some observations of flux-transfer-eventlike phenomena are shown to reveal both 'toward' and 'away' tilting. The 'reverse draping' reported by Hones et al. (1982) is seen as consistent with the stress-balance conditions of an open magnetopause.

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