Length of Day Variations of Venus

Details Length of Day Variations of Venus Length of Day Variations of Venus

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009dps....40.4009k&link_type=abstract

American Astronomical Society, DPS meeting #40, #40.09; Bulletin of the American Astronomical Society, Vol. 41, p.561

Astronomy and Astrophysics

Astronomy

2

Scientific paper

The rotations of the planets with an atmosphere (such as Earth, Mars and Titan) constantly slow down and speed up, due to the angular momentum exchange between the surface and the atmosphere, altering the length of the day (LOD). Variations on the order of millisecond over seasonal time scales have been observed for Mars and Earth, but LOD variations of Venus have not yet been measured. Despite the near-circular orbit and very small obliquity, and the resulting absence of seasons, important variations in the rotation of Venus can still exist due to the variability of the winds in the lower atmosphere over diurnal time scales. With the help of General Circulation Model (GCM) of the Laboratoire de Meteorologie Dynamique (LMD) the variations in the atmospheric angular momentum and the resulting the rotation variations of Venus are investigated.

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