Model of the formation of the low-latitude boundary layer for strongly northward interplanetary magnetic field

Details Model of the formation of the low-latitude boundary layer for strongly northward interplanetary magnetic field Model of the formation of the low-latitude boundary layer for strongly northward interplanetary magnetic field

Feb 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jgr....97.1411s&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 97, Feb. 1, 1992, p. 1411-1420.

Physics

174

Earth Magnetosphere, Interplanetary Magnetic Fields, Magnetosheath, Boundary Layers, Equatorial Regions, Magnetic Field Reconnection, Magnetopause, Solar Wind

Scientific paper

A model for the formation of the low-boundary layer in which a magnetosheath flux tube reconnects in the north and south beyond the cusp when the IMF is strongly northward is presented. For northward IMF the geomagnetic field captures solar wind flux tubes through intermittent reconnection at the cusp region. These newly captured flux tubes shorten and sink into the magnetosphere while the flux tubes reorient themselves as they become assimilated into the magnetosphere. There is no significant acceleration for the particles within the flux tubes. In the magnetosphere the interchange instability disperses the flux tube azimuthally along the magnetopause to form a boundary layer. Subsequent reconnection forms sublayers of the boundary layer and different sublayers represent different ages after reconnection. The interchange instability is stable radially, which keeps sharp boundaries between sublayers and between the boundary layer and magnetosphere.

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