The upper atmosphere of Venus - A tentative explanation of its rotation

Details The upper atmosphere of Venus - A tentative explanation of its rotation The upper atmosphere of Venus - A tentative explanation of its rotation

Feb 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986lastr.100...77b&link_type=abstract

L'Astronomie (ISSN 0004-6302), vol. 100, Feb. 1986, p. 77-83. In French.

Biology

Atmospheric Circulation, Upper Atmosphere, Venus Atmosphere, Angular Velocity, Exobiology, Mariner 10 Space Probe, Pioneer Venus Spacecraft

Scientific paper

The upper atmosphere of Venus seems to revolve every 4 days, while the planet rotates in 243 days. Mariner 10 UV data on the changing positions of dark spots in the upper Venusian clouds have supported estimations of speeds ranging from 120-240 m/s. High rates of acceleration and deceleration occur in the night side, the former between -110 to -90 deg and the latter continuing to -50 deg. Arch and Y formations have been seen repeatedly between -110 to -70 deg. The highest are seen at about -90 deg and the lowest at about -30 deg. It is noted that the temperature of the cloud layer at 60 km altitude is about 20 C, the pressure is nearly one earth atmosphere, and complex molecules, including O, C, H, N and S and combinations of these are present in abundance. The dark formations may be immense aggregates of living organisms. They may have an average density of their milieu, or may remain aloft on ascending currents. If the biotes feed by photosynthesis, the observed accelerations toward the dawnside may occur when the cloud swarm senses the sunlight after growing hungry and slowing in the dark and makes a dash for the food. In situ observations are recommended if the hypothesis is to be tested.

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