Physics
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3224203t&link_type=abstract
Geophysical Research Letters, Volume 32, Issue 24, CiteID L24203
Physics
31
Planetary Sciences: Solid Surface Planets: Atmospheres (0343, 1060), Planetary Sciences: Solid Surface Planets: Meteorology (3346), Planetary Sciences: Solid Surface Planets: Orbital And Rotational Dynamics (1221), Planetary Sciences: Solar System Objects: Titan
Scientific paper
Titan's substantial obliquity and the global extent of the Hadley circulation give rise to seasonal variation in the mean zonal wind speed and direction in the geostrophic lower troposphere, causing an exchange of a substantial amount of angular momentum between the surface and atmosphere. The wind-induced seasonal length-of-day variation calculated using the global wind profile predicted by a Titan general circulation model (GCM) amounts to 30 s in the absence of a deep subsurface ocean decoupling the outer ice shell from the ice mantle and ~400 s in the presence of a deep subsurface ocean. This effect should give rise to longitudinal offsets of surface landmarks by ~10 km and ~100 km, respectively, in comparison to predicted positions based on a constant rotation rate, and may be detectable by Cassini imaging.
Neubauer Fritz Manfred
Tokano Tetsuya
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