Gaël CHOBLET


CNRS resarch associate

 

LPGNantes

tel : +33 (0)276645155

e-mail : gael.choblet@univ-nantes.fr

Pen portrait

My research projects focus on the interior of terrestrial planets (including the Earth), and icy moons of various dimensions (such as Enceladus, Europa or Ganymede). I develop numerical tools describing the dynamics of planetary interiors in order to address topics such as solid-state convection of planetary mantles (or icy layers) including the effects of tidal heating or melting, the relationships between mantle heat transfer and core dynamos and the topographic and gravimetric signature of mantle convection.

 

Publications

  • Guillaume, B., Pochat, S., Monteux, J., Husson, L., Choblet, G., 2016, Can eustatic charts go beyond first order ? Insights from the Permian- Triassic, Lithosphere, in press.
  • Cadek, O., Tobie, G. , Van Hoolst, T., Masse M., Choblet, G., Lefevre, A., Mitri, G., Baland, R.-M., Behounkova, M., Bourgeois, O., Trinh, A., 2016. Enceladus’s internal ocean and ice shell constrained from Cassini gravity, shape, and libration data , Geophys. Res. Lett., 43, 5653– 5660.
  • Choblet, G., Amit, H., Husson, L., 2016, Constraining mantle convec- tion models with palaeomagnetic reversals record and numerical dynamos, Geophys. J. Int., 207 (2), 1165–1184.
  • Monteux, J., Collins, G.S., Tobie, G., Choblet, G., 2016. Conse- quences of large impacts on Enceladus’ core shape, Icarus, 264, 300-310.
  • Amit, H., Choblet, G., Olson, P., Monteux, J., Deschamps, F., Lan- glais, B., Tobie, G., 2015.Towards more realistic core-mantle boundary heat flux patterns : a source of diversity in planetary dynamos Prog. Earth Plan. Sci., 2 (1), 1-26.
  • Amit, H., Deschamps, F., Choblet, G., 2015. Numerical dynamos with outer boundary heat flux inferred from probabilistic tomography: consequences for latitudinal distribution of magnetic flux, Geophys. J. Inter., 203 (2), 840-855.
  • Behounkova, M., Tobie, G., Cadek, O., Choblet, G., Porco, C., Nimmo, F., 2015 Timing of water plume eruptions on Enceladus explained by interior viscosity structure, Nat. Geosci., 8, 601-+.
  • Kuchta, M., Tobie, G., Miljkovic, K., Behounkova, M., Soucek, O., Choblet, G., Cadek, O., 2015. Despinning and shape evolution of Saturn’s moon Iapetus triggered by a giant impact, Icarus, 252, 454-465.
  • Monteux, J., Amit,H., Choblet, G., Langlais, B., Tobie, G., 2015. Giant impacts, heterogeneous mantle heating and a past hemispheric dynamo on Mars, Phys. Earth Plan. Int., 240, 114-124.
  • Choblet, G., Husson, L., Bodin, T., 2014. Probabilistic surface re- construction of coastal sea level rise during the twentieth century J. Geophys. Res., 119, 9206-9236.
  • Monteux, J., Tobie, G., Choblet, G., & Le Feuvre, M., 2014. Can large icy moons accrete undifferentiated ?, Icarus, 237, 337-387.
  • Lefevre, A., Tobie, G., Choblet, G., & Cadek,O., 2014. Structure and dynamics of Titan's outer icy shell constrained from Cassini data, Icarus, 237, 16-28.
  • Kalousova, K., Soucek, O., Tobie, G., Choblet, G., & Cadek, O., 2014, Ice melting and downward transport of meltwater by two-phase flow in Europa’s ice shell, J. Geophys. Res., 119, 532-549.
  • Dumoulin, C., Cadek, O.,  Choblet, G., 2013. Predicting surface dynamic topographies of stagnant lid planetary bodies, Geophys. J. Inter., 195, 1494-1508.
  • Behounkova, M., Tobie, G., Choblet, G., & Cadek, O., 2013. Impact of tidal heating on the onset of convection in Enceladus’s ice shell, Icarus., 226, 898-904.
  • Choblet, G., 2012, On the scaling of heat transfer for mixed heating convection in a spherical shell, Phys. Earth Plan. Int., 206-207, 31-42.

  • Behounkova, M., Tobie, G., Choblet, G., & Cadek, O., 2012. Tidally- induced melting events as the origin of south-pole activity on Enceladus, Icarus, 219, 655-664.

  • Golle, O., Dumoulin, C., Choblet, G., & Cadek, O., 2012. Topography and geoid induced by a convecting mantle beneath an elastic lithosphere, Geophys. J. Int., 189, 55-72.

  • Ostanciaux, E., Husson, L., Choblet, G., Robin, C., & Pedoja, K., Present- day trends of vertical ground motion along the coast lines, Earth Sci. Rev., 110 , 74-92.

  • Amit, H., Choblet, G., 2012, Mantle-driven geodynamo features – Effects of compositional and narrow D” anomalies, Phys. Earth Plan. Int., 190-191, 34-43.

  • Behounkova, M., Tobie, G., Choblet, G., Cadek, O., 2011. Tidally In- duced Thermal Runaways on Extrasolar Earths : Impact on Habitability, Astrophys. J., 728, 89-96.

  • Robuchon,G., Choblet, G., Tobie,G., Cadek,O., Sotin,C. Grasset,O., 2010. Coupling of thermal evolution and despinning of early Iapetus, Icarus, 207, 959 - 971.

  • Hussmann, H., Choblet, G., Lainey, V., Matson, D.L., Sotin, C., Tobie, G. & Van Hoolst, T., 2010. Internal Processes : Energy Sources and Heat Transport in Icy Satellites, Space Sci. Rev., 153, 317 - 348.
  • Behounkova, M., Tobie, G., Choblet, G., Cadek, O., 2010. Coupling mantle convection and tidal dissipation : applications to Enceladus and Earth- like planets, J. Geophys. Res., 115, E09011, doi :10.1029/2009JE003564.

  • Verhoeven, O., Mocquet, A., Vacher, P., Rivoldini, A., Menvielle, M., Arrial, P.-A., Choblet, G., Tarits, P., Dehant, V., Van Hoolst, T., 2009, Constraints on thermal state and composition of the Earth’s lower mantle from electromagnetic impedances and seismic data., J. Geophys. Res., 114, B03302.
  • Pochat, S., Castelltort, S., Choblet, G., & Van den Driessche, J., 2009, High resolution record of tectonic and sedimentary processes in growth strata, Mar. Petrol. Geol., 26, 1350 - 1364.
  • Choblet, G., & Parmentier, E.M., 2009, Thermal Convection Heated both Volumetrically and from Below : Implications for Predictions of Planetary Evolution, Phys. Earth Plan. Int., 173, 290-296. 
  • Amit, H., Choblet, G., 2009, Mantle-driven geodynamo features - effects of post-Perovskite phase transition, Earth Plan. Space61, 1255–1268.
  • Behounkova, M., & Choblet, G., 2009, Onset of convection in a basally heated spherical shell, application to planets, Phys. Earth Plan. Int., 176, 157-173.
  • Dumoulin, C., Choblet, G., Doin, M.-P., 2008, Convective interactions between oceanic lithosphere and asthenosphere : Influence of a transform fault, Earth. Plan. Sci. Lett., 274, 301-309. 
  • Choblet, G., Cadek, O., Couturier, F., & Dumoulin, C., 2007, OEDIPUS : a new tool to study the dynamics of planetary interiors, Geophys. J. Inter., 170, 9-30.
  • Verhoeven, O., Rivoldini, A., Vacher, P., Mocquet, A., Choblet, G., Menvielle, M., Dehant, V., Van Hoolst, T., Sleewagen J., Barriot, J.-P., & Lognonné P., 2005, Interior structure of terrestrial planets. I. Modeling Mars’ mantle and its electromagnetic, geodetic and seismic signatures, J. Geophys. Res., 110, No. E4. 
  • Choblet, G., 2005, Modelling thermal convection with large viscosity gradients in one block of the cubed sphere, J. Comput. Phys., 205, 269-291.
  • Tobie, G., Choblet, G., & Sotin, C., 2003, Tidally heated convection: constraints on europa’s ice shell thickness, J. Geophys. Res., 108, 5124. 
  • Choblet, G.& Sotin, C., 2001, Early transient cooling of Mars, Geophys. Res. Lett., 28, 3035–3038.
  • Choblet, G.& Parmentier, E. M., 2001, Mantle upwelling and melting beneath slow spreading centers : effects of realistic rheology and melt productivity, Earth Planet. Sci. Lett., 184, 589–604.
  • Choblet, G. & Sotin, C., 2000, 3D thermal convection with variable viscosity: can transient cooling be described by a steady state scaling law?, Phys. Earth Planet. Inter., 119, 321–336.