Strong ocean tidal flow and heating on moons of the outer planets

Robert H. Tyler ()
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Robert H. Tyler: University of Washington, 1013 NE 40th Street, Seattle, Washington 98105, USA

Nature, 2008, vol. 456, issue 7223, 770-772

Abstract: Moons under water There is mounting evidence for liquid oceans on several moons of the outer Solar System planets. How these oceans manage to remain liquid is something of a mystery, considering the low surface temperatures and meagre radiogenic heat sources on these moons. Taking Jupiter's moon Europa as a model, Robert Tyler calculates that a previously unconsidered tidal force caused by obliquity, the axial tilt of the moon with respect to its orbital plane, could be inducing waves within the ocean itself. Such waves could be the dominant source of ocean heat.

Date: 2008
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DOI: 10.1038/nature07571

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