Structure of the low-latitude boundary layer

Details Structure of the low-latitude boundary layer Structure of the low-latitude boundary layer

Publishing date

Apr 1981

URL

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.2099s&link_type=abstract

Journals

Journal of Geophysical Research, vol. 86, Apr. 1, 1981, p. 2099-2110. Research sponsored by the U.S. Department of Energy; Bund

Science

Other

Additional info 2

250

Additional info 3

Boundary Layer Plasmas, Magnetopause, Plasma Diagnostics, Space Plasmas, High Temperature Plasmas, International Sun Earth Explorers, Magnetohydrodynamic Flow, Magnetosheath, Plasma Density

Type

Scientific paper

Abstract

High temporal resolution observations of the frontside magnetopause and plasma boundary layer made with the fast plasma analyzer aboard the ISEE 1 and 2 spacecraft are reported. The data are found to be compatible with a boundary layer that is always attached to the magnetopause but where the layer thickness has a large-scale spatial modulation pattern which travels tailward past the spacecraft. Periods are included when the thickness is essentially zero and others when it is of the order of 1 earth radius. The duration of these periods is highly variable but is typically in the range of 2-5 min corresponding to a distance along the magnetopuase of approximately 3-8 earth radii. The observed boundary layer features include a steep density gradient at the magnetopause with an approximately constant boundary layer plasma density amounting to about 25% of the magnetosheath density, and a second abrupt density decrease at the inner edge of the layer.

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