Missing pressure in the dayside ionosphere of Venus

Details Missing pressure in the dayside ionosphere of Venus Missing pressure in the dayside ionosphere of Venus

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992georl..19.1431c&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 19, no. 14, July 24, 1992, p. 1431-1434.

Physics

6

Pioneer Venus Spacecraft, Planetary Ionospheres, Solar Wind, Venus Atmosphere, Wind Pressure, Dynamic Pressure, Interplanetary Magnetic Fields

Scientific paper

Data obtained by various instruments on the Pioneer-Venus spacecraft were used to study the conservation of momentum flux from the solar wind through the dayside ionopause into the thermal Venus ionosphere. A consistent pressure deficit was found below the ionopause, with a strong dependence on solar wind pressure. Independent of solar wind pressure, the pressure deficit was found to decrease with decreasing altitude below the ionopause. Measurements of this pressure deficit (missing pressure) are presented as a function of altitude for various solar wind conditions. The identity of the missing pressure component and the correlation with solar wind pressure are discussed.

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