An extended study of the low-latitude boundary layer on the dawn and dusk flanks of the magnetosphere

Details An extended study of the low-latitude boundary layer on the dawn and dusk flanks of the magnetosphere An extended study of the low-latitude boundary layer on the dawn and dusk flanks of the magnetosphere

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jgr....92.7394m&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 92, July 1, 1987, p. 7394-7404.

Physics

177

Atmospheric Boundary Layer, Earth Magnetosphere, Magnetic Field Configurations, Space Plasmas, Boundary Layer Flow, Daytime, Geomagnetism, International Sun Earth Explorer 2, Interplanetary Magnetic Fields, Magnetosheath, Night Sky

Scientific paper

The characteristics and structure of the low-latitude boundary layer (LLBL) have been studied for 66 ISEE 1 passes through the LLBL region. The dawn and dusk LLBL are on closed magnetic field lines for northward magnetosheath and/or IMF (M/IMF), and are on both closed and open field lines for southward M/IMF. For southward M/IMF, the regions of open LLBL field lines lie adjacent to the magnetopause and outside the closed LLBL. The LLBL is thicker (thinner) for northward (southward) M/IMF. With distance away from the subsolar magnetosphere, the LLBL becomes thicker for northward M/IMF and more variable in thickness for southward M/IMF. No dependence of LLBL thickness or electric field on geomagnetic activity is seen in these data. The LLBL electric field is a few millivolts per meter with a apparent upper limit of about 10 mV/m. The field captures magnetospherically drifting particles and propels them tailward.

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