Transient flux tubes in the terrestrial magnetosphere

Details Transient flux tubes in the terrestrial magnetosphere Transient flux tubes in the terrestrial magnetosphere

Jan 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17...49p&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 17, Jan. 1990, p. 49-52.

Physics

90

Earth Magnetosphere, Geomagnetic Tail, Magnetic Flux, Plasma Density, Plasma Drift, Magnetic Field Configurations, Magnetospheric Electron Density, Magnetospheric Ion Density, Plasma Pressure

Scientific paper

Small, isolated density depletions are postulated to be introduced into the magnetotail by an uneven plasma loading process in the far tail. Such bubbles would be displaced earthward by an interchange process, and a significant depletion would move faster than either the gradient-curvature drift speed or the average convection speed. The dissolution of a bubble into the background results in a local reduction in plasma density, thereby violating ideal MHD and the subsequent conservation of plasma content. If a sufficient amount of magnetic flux in the far tail is contained in bubbles, then the net effect may be a reduction of plasma pressure in the near tail sufficient to resolve the pressure balance inconsistency.

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