Normal modes and resonance in Ontario Lacus: a hydrocarbon lake of Titan

David Vincent, Jonathan Lambrechts, Özgur Karatekin, Tim Van Hoolst, Robert H. Tyler, Véronique Dehant, Eric Deleersnijder

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Abstract

The natural modes of Ontario Lacus surface oscillations, the largest lake in Titan’s southern hemisphere, are simulated and analyzed as they are potentially of broad interest in a variety of dynamical researches. We found that tidal forces are too low in frequency to excite the (barotropic) normal modes. Broadband wind forcing likely spans the resonant frequencies. High wind speed, which could be encountered under episodic phenomena such as storms, would be required to significantly excite the normal modes. While the slower baroclinic normal modes could more easily be resonantly forced by the low-frequency tidal forces, addressing this issue demands unavailable information about the lake stratification.

Original languageEnglish
Pages (from-to)1121-1132
Number of pages12
JournalOcean Dynamics
Volume69
Issue number10
DOIs
Publication statusPublished - 2019

Keywords

  • Extraterrestrial oceanography
  • Natural modes
  • Ontario Lacus
  • Titan

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    Vincent, D., Lambrechts, J., Karatekin, Ö., Van Hoolst, T., Tyler, R. H., Dehant, V., & Deleersnijder, E. (2019). Normal modes and resonance in Ontario Lacus: a hydrocarbon lake of Titan. Ocean Dynamics, 69(10), 1121-1132. https://doi.org/10.1007/s10236-019-01290-2