Nightward ion flow in the Venus ionosphere - Implications of momentum balance

Details Nightward ion flow in the Venus ionosphere - Implications of momentum balance Nightward ion flow in the Venus ionosphere - Implications of momentum balance

Oct 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984georl..11.1007e&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 11, Oct. 1984, p. 1007-1010.

Physics

17

Ion Motion, Ionospheric Propagation, Momentum Transfer, Night, Planetary Ionospheres, Venus Atmosphere, Atmospheric Models, Flow Velocity, Magnetohydrodynamic Flow, Vertical Motion, Venus, Ionosphere, Ions, Flows, Momentum, Plasmas, Shear, Viscosity, Altitude, Calculations, Turbulence, Waves, Density, Magnetic Fields, Rotation, Solar Wind, Interactions

Scientific paper

Using global empirical models of Venus ionospheric conditions, the plasma flow field consistent with the horizontal momentum equation in both viscid and inviscid forms is solved for. It is found that plasma viscosity is negligible except at low altitudes and that the observed plasma flows are consistent with the inviscid solution above 300 km but are larger than the calculated flows at lower altitudes. This is probably due to downward momentum advection. The strong vertical shear in the calculated and observed flows just beyond the terminator may produce turbulence there, manifested as the observed transterminator waves in plasma density and magnetic field. The implications of ionospheric superrotation are discussed.

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