Theory of the low attitude boundary layer

Details Theory of the low attitude boundary layer Theory of the low attitude boundary layer

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979esasp.148..395s&link_type=abstract

In ESA Magnetospheric Boundary Layers p 395-397 (SEE N80-13529 04-42)

Physics

1

Atmospheric Models, Boundary Layer Plasmas, Geomagnetic Latitude, Coupling, Field Aligned Currents, Ionospheric Currents, Magnetopause, One Dimensional Flow

Scientific paper

A one dimensional steady state fluid mechanical model is developed of the low latitude plasma boundary layer inside the dawn and dusk magnetopause. Momentum transfer in the layer is produced by viscosity and/or mass diffusion. Coupling to the ionospheric is achieved via field aligned currents, the magnitude of which is limited by parallel potential drops. These currents flow into and out of the ionosphere in the manner described by Iijima and Potemra. The higher latitude (region 1) currents are associated with the boundary layer proper, the lower latitude (region 2) ones with a region of sunward return flow adjacent to the boundary layer. The parallel potential drops have the typically observed magnitude of 2 to 3 kV and a north south extent of 100 to 200 km. Ionospheric electric fields and field aligned current strengths are also in approximate agreement with observations.

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