Titan’s strong tidal dissipation precludes a subsurface ocean
Nixon, C. et al. Titan’s cold case files – outstanding questions after Cassini-Huygens. Planet. Space Sci. 155, 50–72 (2018).
Google Scholar
Iess, L. et al. The tides of Titan. Science 337, 457–459 (2012).
Google Scholar
Durante, D., Hemingway, D., Racioppa, P., Iess, L. & Stevenson, D. Titan’s gravity field and interior structure after Cassini. Icarus 326, 123–132 (2019).
Google Scholar
Downey, B. G. & Nimmo, F. Titan’s spin state as a constraint on tidal dissipation. Sci. Adv. 11, eadl4741 (2025).
Google Scholar
Tobie, G., Mocquet, A. & Sotin, C. Tidal dissipation within large icy satellites: applications to Europa and Titan. Icarus 177, 534–549 (2005).
Google Scholar
Kalousová, K. & Sotin, C. Dynamics of Titan’s high-pressure ice layer. Earth Planet. Sci. Lett. 545, 116416 (2020).
Google Scholar
Iess, L. et al. Gravity field, shape, and moment of inertia of Titan. Science 327, 1367–1369 (2010).
Google Scholar
Castillo-Rogez, J. C. & Lunine, J. I. Evolution of Titan’s rocky core constrained by Cassini observations. Geophys. Res. Lett. 37, L20205 (2010).
Google Scholar
Néri, A., Guyot, F., Reynard, B. & Sotin, C. A carbonaceous chondrite and cometary origin for icy moons of Jupiter and Saturn. Earth Planet. Sci. Lett. 530, 115920 (2020).
Google Scholar
Rappaport, N. J. et al. Can Cassini detect a subsurface ocean in Titan from gravity measurements? Icarus 194, 711–720 (2008).
Google Scholar
Segatz, M., Spohn, T., Ross, M. & Schubert, G. Tidal dissipation, surface heat flow, and figure of viscoelastic models of Io. Icarus 75, 187–206 (1988).
Google Scholar
Sohl, F., Hussmann, H., Schwentker, B., Spohn, T. & Lorenz, R. D. Interior structure models and tidal Love numbers of Titan. J. Geophys. Res. Planets 108, 5130 (2003).
Google Scholar
Mitri, G. et al. Shape, topography, gravity anomalies and tidal deformation of Titan. Icarus 236, 169–177 (2014).
Google Scholar
Baland, R.-M., Tobie, G., Lefèvre, A. & Van Hoolst, T. Titan’s internal structure inferred from its gravity field, shape, and rotation state. Icarus 237, 29–41 (2014).
Google Scholar
Idini, B. & Nimmo, F. Resonant stratification in Titan’s global ocean. Planet. Sci. J. 5, 15 (2024).
Google Scholar
Goossens, S., van Noort, B., Mate, A., Mazarico, E. & van der Wal, W. A low-density ocean inside Titan inferred from Cassini data. Nat. Astron. 8, 846–855 (2024).
Google Scholar
Stiles, B. W. et al. Determining Titan’s spin state from Cassini RADAR Images. Astron. J. 135, 1669–1680 (2008).
Google Scholar
Baland, R.-M., Van Hoolst, T., Yseboodt, M. & Karatekin, O. Titan’s obliquity as evidence of a subsurface ocean? Astron. Astrophys. 530, A141 (2011).
Google Scholar
Bills, B. G. & Nimmo, F. Rotational dynamics and internal structure of Titan. Icarus 214, 351–355 (2011).
Google Scholar
Baland, R.-M., Yseboodt, M. & Van Hoolst, T. The obliquity of Enceladus. Icarus 268, 12–31 (2016).
Google Scholar
Béghin, C. et al. Analytic theory of Titan’s Schumann resonance: constraints on ionospheric conductivity and buried water ocean. Icarus 218, 1028–1042 (2012).
Google Scholar
Lorenz, R. D. & Le Gall, A. Schumann resonance on Titan: a critical re-assessment. Icarus 351, 113942 (2020).
Google Scholar
Le Maistre, S. et al. Spin state and deep interior structure of Mars from InSight radio tracking. Nature 619, 733–737 (2023).
Google Scholar
Buccino, D., Border, J. S., Folkner, W. M., Kahan, D. & Le Maistre, S. Low-SNR Doppler data processing for the InSight radio science experiment. Remote Sens. 14, 1924 (2022).
Google Scholar
Ray, R. D., Eanes, R. J. & Lemoine, F. G. Constraints on energy dissipation in the Earth’s body tide from satellite tracking and altimetry. Geophys. J. Int. 144, 471–480 (2001).
Google Scholar
Bagheri, A., Khan, A., Al-Attar, D., Crawford, O. & Giardini, D. Tidal response of Mars constrained from laboratory-based viscoelastic dissipation models and geophysical data. J. Geophys. Res. Planets 124, 2703–2727 (2019).
Google Scholar
Petricca, F. et al. Partial differentiation of Europa and implications for the origin of materials in the Jupiter system. Nat. Astron. 9, 501–511 (2025).
Google Scholar
Petricca, F. et al. Exploring the tidal responses of ocean worlds with PyALMA. Icarus 417, 116120 (2024).
Google Scholar
Yao, C., Deschamps, F., Lowman, J. P., Sanchez-Valle, C. & Tackley, P. J. Stagnant lid convection in bottom-heated thin 3-D spherical shells: influence of curvature and implications for dwarf planets and icy moons. J. Geophys. Res. Planets 119, 1895–1913 (2014).
Google Scholar
Castillo-Rogez, J. C., Efroimsky, M. & Lainey, V. The tidal history of Iapetus: spin dynamics in the light of a refined dissipation model. J. Geophys. Res. Planets 116, E09008 (2011).
Google Scholar
Hilairet, N. et al. High-pressure creep of serpentine, interseismic deformation, and initiation of subduction. Science 318, 1910–1913 (2007).
Google Scholar
Poirier, J. P., Sotin, C. & Peyronneau, J. Viscosity of high-pressure ice VI and evolution and dynamics of Ganymede. Nature 292, 225–227 (1981).
Google Scholar
Durham, W. B., Stern, L. A. & Kirby, S. H. Rheology of water ices V and VI. J. Geophys. Res. Solid Earth 101, 2989–3001 (1996).
Google Scholar
Zarriz, A., Journaux, B. & Powell-Palm, M. J. On the equilibrium limit of liquid stability in pressurized aqueous systems. Nat. Commun. 15, 10666 (2024).
Google Scholar
Lunine, J. I. & Stevenson, D. J. Clathrate and ammonia hydrates at high pressure: application to the origin of methane on Titan. Icarus 70, 61–77 (1987).
Google Scholar
Tobie, G., Lunine, J. & Sotin, C. Episodic outgassing as the origin of atmospheric methane on Titan. Nature 440, 61–64 (2006).
Google Scholar
Lainey, V. et al. Resonance locking in giant planets indicated by the rapid orbital expansion of Titan. Nat. Astron. 4, 1053–1058 (2020).
Google Scholar
Wisdom, J. et al. Loss of a satellite could explain Saturn’s obliquity and young rings. Science 377, 1285–1289 (2022).
Google Scholar
Asphaug, E. & Reufer, A. Late origin of the Saturn system. Icarus 223, 544–565 (2013).
Google Scholar
Journaux, B. et al. Large ocean worlds with high-pressure ices. Space Sci. Rev. 216, 7 (2020).
Google Scholar
Sotin, C., Kalousová, K. & Tobie, G. Titan’s interior structure and dynamics after the Cassini-Huygens mission. Annu. Rev. Earth Planet. Sci. 49, 579–607 (2021).
Google Scholar
Hendrix, A. R. et al. The NASA Roadmap to Ocean Worlds. Astrobiology 19, 1–27 (2019).
Google Scholar
Kalousová, K. et al. Evolution of impact melt pools on Titan. J. Geophys. Res. Planets 129, e2023JE008107 (2024).
Google Scholar
Arrigo, K. R. Sea ice ecosystems. Annu. Rev. Mar. Sci. 6, 439–467 (2014).
Google Scholar
Cappuccio, P. et al. Ganymede’s gravity, tides and rotational state from JUICE’s 3GM experiment simulation. Planet. Space Sci. 187, 104902 (2020).
Google Scholar
Kivelson, M., Khurana, K. & Volwerk, M. The permanent and inductive magnetic moments of Ganymede. Icarus 157, 507–522 (2002).
Google Scholar
Showman, A. P., Stevenson, D. J. & Malhotra, R. Coupled orbital and thermal evolution of Ganymede. Icarus 129, 367–383 (1997).
Google Scholar
Jia, X., Kivelson, M. G., Khurana, K. K. & Walker, R. J. Improved models of Ganymede’s permanent and induced magnetic fields based on Galileo and Juno data. J. Geophys. Res. Planets 130, e2024JE008309 (2025).
Google Scholar
Sotin, C. et al. Oceanus: a New Frontiers orbiter to study Titan’s potential habitability. 19th EGU General Assembly (2017).
Evans, S. et al. MONTE: the next generation of mission design and navigation software. CEAS Space J. 10, 79–86 (2018).
Google Scholar
Buccino, D. R., Kahan, D. S., Yang, O. & Oudrhiri, K. Extraction of Doppler observables from open-loop recordings for the Juno radio science investigation. In Proc. 2018 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM) (IEEE, 2018).
Jacobson, R. A. The orbits of the main Saturnian satellites, the Saturnian system gravity field, and the orientation of Saturn’s pole. Astron. J. 164, 199 (2022).
Google Scholar
Justus, C., Duvall, A. & Johnson, D. Engineering-level model atmospheres for Titan and Neptune. In Proc. 39th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit (American Institute of Aeronautics and Astronautics, 2003).
Lebonnois, S., Burgalat, J., Rannou, P. & Charnay, B. Titan global climate model: a new 3-dimensional version of the IPSL Titan GCM. Icarus 218, 707–722 (2012).
Google Scholar
Petricca, F., Genova, A., Goossens, S., Iess, L. & Spada, G. Constraining the internal structures of Venus and Mars from the gravity response to atmospheric loading. Planet. Sci. J. 3, 164 (2022).
Google Scholar
Cascioli, G. et al. Constraining the Venus interior structure with future VERITAS measurements of the gravitational atmospheric loading. Planet. Sci. J. 4, 65 (2023).
Google Scholar
Journaux, B. et al. Holistic approach for studying planetary hydrospheres: Gibbs representation of ices thermodynamics, elasticity, and the water phase diagram to 2,300 MPa. J. Geophys. Res. Planets 125, e2019JE006176 (2020).
Google Scholar
Vance, S., Bouffard, M., Choukroun, M. & Sotin, C. Ganymede’s internal structure including thermodynamics of magnesium sulfate oceans in contact with ice. Planet. Space Sci. 96, 62–70 (2014).
Google Scholar
Bollengier, O., Brown, J. M. & Shaw, G. H. Thermodynamics of pure liquid water: sound speed measurements to 700 MPa down to the freezing point, and an equation of state to 2300 MPa from 240 to 500 K. J. Chem. Phys. 151, 054501 (2019).
Google Scholar
Bagheri, A. et al. The tidal–thermal evolution of the Pluto–Charon system. Icarus 376, 114871 (2022).
Google Scholar
Jackson, I. & Faul, U. H. Grainsize-sensitive viscoelastic relaxation in olivine: towards a robust laboratory-based model for seismological application. Phys. Earth Planet. Inter. 183, 151–163 (2010).
Google Scholar
Bierson, C. J. The impact of rheology model choices on tidal heating studies. Icarus 414, 116026 (2024).
Google Scholar
Amorim, D. O. & Gudkova, T. Constraining Earth’s mantle rheology with Love and Shida numbers at the M2 tidal frequency. Phys. Earth Planet. Inter. 347, 107144 (2024).
Google Scholar
Petricca, F. et al. Characterization of icy moon hydrospheres through joint inversion of gravity and magnetic field measurements. Geophys. Res. Lett. 50, e2023GL104016 (2023).
Google Scholar
Foreman-Mackey, D., Hogg, D. W., Lang, D. & Goodman, J. emcee: the MCMC hammer. Publ. Astron. Soc. Pac. 125, 306–312 (2013).
Google Scholar
Cascioli, G., Mazarico, E., Dombard, A. J. & Nimmo, F. Leveraging the gravity field spectrum for icy satellite interior structure determination: the case of Europa with the Europa Clipper Mission. Planet. Sci. J. 5, 45 (2024).
Google Scholar
Lainey, V., Arlot, J.-E., Karatekin, O. & Van Hoolst, T. Strong tidal dissipation in Io and Jupiter from astrometric observations. Nature 459, 957–959 (2009).
Google Scholar
Iess, L. et al. Measurement and implications of Saturn’s gravity field and ring mass. Science 364, eaat2965 (2019).
Google Scholar
McCarthy, C. & Cooper, R. F. Tidal dissipation in creeping ice and the thermal evolution of Europa. Earth Planet. Sci. Lett. 443, 185–194 (2016).
Google Scholar
Solomatov, V. S. Scaling of temperature- and stress-dependent viscosity convection. Phys. Fluids 7, 266–274 (1995).
Google Scholar
Lorenz, R. D. et al. Titan’s rotation reveals an internal ocean and changing zonal winds. Science 319, 1649–1651 (2008).
Google Scholar
Meriggiola, R., Iess, L., Stiles, B., Lunine, J. & Mitri, G. The rotational dynamics of Titan from Cassini RADAR images. Icarus 275, 183–192 (2016).
Google Scholar
Béghin, C. The atypical generation mechanism of Titan’s Schumann resonance. J. Geophys. Res. Planets 119, 520–531 (2014).
Google Scholar
Colombo, G. Cassini’s Second and Third Laws. In: Measure of the Moon. Astrophysics and Space Science Library, Vol 8, 12–22 (Springer, 1967).
Yoder, C. The free librations of a dissipative Moon. Philos. Trans. R. Soc. Lond. A Math. Phys. Sci. 303, 327–338 (1981).
Google Scholar
Williams, J. G., Boggs, D. H., Yoder, C. F., Ratcliff, J. T. & Dickey, J. O. Lunar rotational dissipation in solid body and molten core. J. Geophys. Res. Planets 106, 27933–27968 (2001).
Google Scholar
Tokano, T. Tidal winds on Titan caused by Saturn. Icarus 158, 499–515 (2002).
Google Scholar
Charnay, B., Tobie, G., Lebonnois, S. & Lorenz, R. D. Gravitational atmospheric tides as a probe of Titan’s interior: application to Dragonfly. Astron. Astrophys. 658, A108 (2022).
Google Scholar
Kamata, S. et al. Tidal deformation of Ganymede: sensitivity of Love numbers on the interior structure. J. Geophys. Res. Planets 121, 1362–1375 (2016).
Google Scholar
McKinnon, W. B. Convective instability in Europa’s floating ice shell. Geophys. Res. Lett. 26, 951–954 (1999).
Google Scholar
Choukroun, M. & Grasset, O. Thermodynamic model for water and high-pressure ices up to 2.2 GPa and down to the metastable domain. J. Chem. Phys. 127, 124506 (2007).
Google Scholar
Tobie, G., Choblet, G. & Sotin, C. Tidally heated convection: constraints on Europa’s ice shell thickness. J. Geophys. Res. Planets 108, 5124 (2003).
Google Scholar
Ojakangas, G. W. & Stevenson, D. J. Thermal state of an ice shell on Europa. Icarus 81, 220–241 (1989).
Google Scholar
Renaud, J. P. & Henning, W. G. Increased tidal dissipation using advanced rheological models: implications for Io and tidally active exoplanets. Astrophys. J. 857, 98 (2018).
Google Scholar
Bagheri, A. et al. Tidal insights into rocky and icy bodies: an introduction and overview. Adv. Geophys. 63, 231–320 (2022).
Google Scholar
Peltier, W. R. The impulse response of a Maxwell Earth. Rev. Geophys. 12, 649–669 (1974).
Google Scholar
Bills, B. G. Improved estimate of tidal dissipation within Mars from MOLA observations of the shadow of Phobos. J. Geophys. Res. Planets 110, E07004 (2005).
Google Scholar
Gao, P. & Stevenson, D. J. Nonhydrostatic effects and the determination of icy satellites’ moment of inertia. Icarus 226, 1185–1191 (2013).
Google Scholar
Moore, W. B. & Schubert, G. The tidal response of Ganymede and Callisto with and without liquid water oceans. Icarus 166, 223–226 (2003).
Google Scholar
Mazarico, E., Barker, M. K., Neumann, G. A., Zuber, M. T. & Smith, D. E. Detection of the lunar body tide by the Lunar Orbiter Laser Altimeter. Geophys. Res. Lett. 41, 2282–2288 (2014).
Google Scholar
Xiao, H. et al. Mercury’s tidal Love number h2 from co-registration of MLA profiles. Geophys. Res. Lett. 52, e2024GL112266 (2025).
Google Scholar
Durante, D. et al. Analysis of Cassini altimetric crossovers on Titan. Remote Sens. 16, 2209 (2024).
Google Scholar
Steinbrügge, G. et al. Assessing the potential for measuring Europa’s tidal Love number h2 using radar sounder and topographic imager data. Earth Planet. Sci. Lett. 482, 334–341 (2018).
Google Scholar
Steinbrügge, G., Stark, A., Hussmann, H., Sohl, F. & Oberst, J. Measuring tidal deformations by laser altimetry. A performance model for the Ganymede Laser Altimeter. Planet. Space Sci. 117, 184–191 (2015).
Google Scholar
Van Hoolst, T., Baland, R.-M. & Trinh, A. On the librations and tides of large icy satellites. Icarus 226, 299–315 (2013).
Google Scholar
Thomas, P. et al. Enceladus’s measured physical libration requires a global subsurface ocean. Icarus 264, 37–47 (2016).
Google Scholar
Hemingway, D. J. & Nimmo, F. Looking for subsurface oceans within the moons of Uranus using librations and gravity. Geophys. Res. Lett. 51, e2024GL110409 (2024).
Google Scholar
Petricca, F., Landau, D., Melwani Daswani, M. & Castillo-Rogez, J. Gravity and radio science investigation at the moons of Uranus to reveal subsurface oceans and characterize interior structures. J. Geophys. Res. Planets 130, e2024JE008715 (2025).
Google Scholar
Van Hoolst, T., Rambaux, N., Karatekin, O., Dehant, V. & Rivoldini, A. The librations, shape, and icy shell of Europa. Icarus 195, 386–399 (2008).
Google Scholar
Styczinski, M., Melini, D. & Tharimena, S. drsaikirant88/PyALMA3: author list correction. Zenodo https://doi.org/10.5281/zenodo.10476128 (2024).
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