Computer Science
Scientific paper
Nov 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982p%26ss...30.1127l&link_type=abstract
Planetary and Space Science, vol. 30, Nov. 1982, p. 1127-1132.
Computer Science
8
Magnetohydrodynamic Waves, Magnetopause, Plasma Interactions, Refracted Waves, Solar Wind, Wave Reflection, Energy Transfer, Geomagnetic Pulsations, Incident Radiation, Magnetic Flux
Scientific paper
The reflection and refraction of MHD waves through an 'open' magnetopause (rotational discontinuity) is studied. It is found that most of the incident wave energy can be transmitted through the open magnetopause. A transverse Alfven wave (or a compressional magnetosonic wave) from the solar wind incident upon the open magnetopause would generally lead to the generation of both the transverse Alfven and compressional magnetosonic waves in the magnetosphere. Transmission of Alfven waves in the coplanar rotational discontinuity is studied in detail. The integral power of the Alfven-wave transfer is found to be proportional to the open magnetic flux of the magnetosphere and is typically about 1% of the power of the total electromagnetic energy transfer through the open magnetopause. The transmitted wave power may contribute significantly to the geomagnetic pulsations observed on the ground, especially in the open-field-line region.
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