Simulation of tides in hydrocarbon lakes on Saturn's moon Titan

Details Simulation of tides in hydrocarbon lakes on Saturn's moon Titan Simulation of tides in hydrocarbon lakes on Saturn's moon Titan

Aug 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010ocdyn..60..803t&link_type=abstract

Ocean Dynamics, Volume 60, Issue 4, pp.803-817

Computer Science

1

Tides, Extraterrestrial Lake, Titan

Scientific paper

Numerous hydrocarbon lakes have recently been detected on Saturn’s largest moon Titan, representing the only known large bodies of liquids on a planetary surface outside the Earth. In the context of comparative oceanography, tides and tidal currents in two representative lakes on Titan (Kraken Mare and Ontario Lacus) are simulated by a three-dimensional baroclinic ocean circulation model. Since the tide-generating force on Titan is an order of magnitude larger than on Earth and the gravitational acceleration is small, tides and currents are substantially larger than in Earth’s lakes and are more comparable with those in Earth’s oceans. The predicted maximum tidal range in Kraken Mare is 4 m. The tidal wave propagates around the basin of Kraken Mare, while a nearly standing tidal wave is excited in Ontario Lacus. Titan’s rotation is too slow to affect the tidal flow in any Titan’s lake. The tidal current velocity in Kraken Mare amounts to a few centimeters per second except in the vicinity of a narrow strait, where it is enhanced by an order of magnitude. In summer, when the lake is stratified, internal tides can develop. Seiches cannot be caused by tide. In the largest lakes, atmospheric tide may cause additional lake surface displacements.

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