Viscous dissipation at the Venus ionopause

Details Viscous dissipation at the Venus ionopause Viscous dissipation at the Venus ionopause

Sep 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....87.7405p&link_type=abstract

Journal of Geophysical Research, vol. 87, Sept. 1, 1982, p. 7405-7412.

Physics

24

Planetary Ionospheres, Solar Wind, Space Plasmas, Venus Atmosphere, Energy Dissipation, Momentum Transfer, Oxygen Ions, Viscosity

Scientific paper

Consideration of the effects of shocked solar wind momentum transfer to the Venus ionosphere near the terminator region shows that the momentum flux deficiency within the ionosheath velocity boundary layer is comparable to the momentum flux present in the upper ionosphere near the terminator. It is also found by means of the observed concentration of planetary O(plus) ions in the wake that mass loading processes alone cannot account for the loss of momentum flux above the ionopause. An efficient coupling must instead exist between the plasma above and below that boundary. Study results indicate that a column-integrated energy deposition of the order of 0.01 ergs/sq cm per sec can be predicted near the terminator. This number is comparable to those previously suggested to be neccessary in order to heat the nightside ionosphere.

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