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Florian Sévellec Home Page

sync of localy coupled chaotic oscillators of the ACC


Research Scientist in Ocean Physics and Climate Dynamics Laboratoire d'Océanographie Physique et Spatiale,
Email: florian.sevellec[at]univ-brest.fr Centre Nationale de la Recherche Scientifique,
ResearcherID: L-3125-2015 Institut Universitaire Européen de la Mer,
ORCID: http://orcid.org/0000-0002-8498-0004 Brest, France
Curriculum vitae


Research Interest

My research interests focus on the stability and the low-frequency variability of the ocean circulation and its role in the climate system. Specifically, I am investigating the impact of forcing, such as the freshwater & heat fluxes or wind stress, initial condition, and mesoscale turbulence on the ocean and climate dynamics through analytical approaches and numerical modeling.

  • Low-frequency Variability of the Meridional Overturning Circulation
  • Role of mesoscale turbulence
  • ENSO dynamics
  • Dynamical System Theory
  • Numerical Modeling
optimal heat flux perturbation of the moc intensity strange attractor of the MOC
Currently working on:

Predictability and optimal perturbations of the ocean and climate dynamics,

at the Laboratoire d'Océanographie Physique et Spatiale, Centre National de la Recherche Scientifique, Brest, France;


Publications

* indicates invited contributions.
† indicates publications from supervised PhD students and from sponsored postdoctoral researchers.

    2022:

  1. Ruiz, J., P. Ailliot, T. T. T. Chau, P. Le Bras, V. Monbet, F. Sévellec, and P. Tandeo, 2022: Analog Data Assimilation for the Selection of Suitable General Circulation Models, accepted in Geosci. Model Dev. [doi.org/10.5194/gmd-2021-434]
  2. Sévellec, F., A. Colin de Verdière, and N. Kolodziejczyk, 2022: Estimation of horizontal turbulent diffusivity from deep Argo float displacements, J. Phys. Oceanogr., 52, 1509-1529 [pdf]
  3. † Hochet, A., T. Huck, O. Arzel, F. Sévellec, and A. Colin de Verdière, 2021: Energy transfers between multidecadal and turbulent variability, J. Climate, 35, 1157-1178. [pdf]
  4. 2021:

  5. † Stephenson, D. and F. Sévellec, 2021: Dynamical attribution of North Atlantic interdecadal predictability to oceanic and atmospheric turbulence under diagnosed and optimal stochastic forcing, J. Climate, 34, 9153-9179. [pdf]
  6. † Stephenson, D. and F. Sévellec, 2021: The active and passive roles of the ocean in generating basin-scale heat content variability, Geophys. Res. Lett., 48, e2020GL091874. [pdf]
  7. Sévellec, F., A. C. Naveira Garabato, and T. Huck, 2021: Damping of climate-scale oceanic variability by mesoscale eddy turbulence, J. Phys. Oceanogr., 51, 491-503. [pdf]
  8. 2020:

  9. † Lobelle, D., C. Beaulieu, V. Livina, F. Sévellec, and E. Frajka-Williams, 2020: Detectability of an AMOC decline in current and projected climate changes, Geophys. Res. Lett., 47, e2020GL089974. [pdf]
  10. † Hochet, A., T. Huck, O. Arzel, F. Sévellec, M. Mazloff, B. Cornuelle, and A. Colin de Verdière, 2020: Direct temporal cascade of temperature variance in eddy-permitting simulations of multidecadal variability, J. Climate, 33, 9409-9425. [pdf]
  11. Sinha, B., F. Sévellec, J. Robson, and G. Nurser, 2020: Surging of global surface temperature due to decadal legacy of ocean heat uptake, J. Climate, 33, 8025-8045. [pdf]
  12. † Stephenson, D., S. Müller, and F. Sévellec, 2020: Tracking water masses using passive-tracer transport in NEMO v3.4 with NEMOTAM: application to North Atlantic Deep Water and North Atlantic Subtropical Mode Water, Geosci. Model Dev., 13, 2031-2050. [pdf]
  13. 2019:

  14. Sévellec, F. and S. S. Drijfhout, 2019: The Signal-to-Noise paradox for interannual Surface Atmospheric Temperature predictions, Geophys. Res. Lett., 46, 9031-9041. [pdf, si]
  15. Moat, B. I., B. Sinha, S. A. Josey, J. Robson, P. Ortega, F. Sévellec, N. P. Holliday, G. D. McCarthy, A. L. New, and J. J.-M. Hirschi, 2019: Insights into decadal North Atlantic Sea Surface Temperature and ocean heat content variability from an eddy-permitting coupled climate model, J. Climate, 32, 6137-6161. [pdf]
  16. Sévellec, F., A. Naveira Garabato, C. Vic, and N. Ducousso, 2019: Observing the Local Emergence of the Southern Ocean Residual-Mean Circulation, Geophys. Res. Lett., 46, 3862-3870. [pdf, si]
  17. Liu, W., A. V. Fedorov, and F. Sévellec, 2019: The mechanisms of the Atlantic Meridional Overturning Circulation slow-down induced by Arctic sea ice decline, J. Climate, 32, 977-996. [pdf]
  18. 2018:

  19. Sévellec, F. and S. S. Drijfhout, 2018: A novel probabilistic forecast system predicting anomalously warm 2018-2022 reinforcing the long-term Global Warming trend, Nature Communications, 9, 3024. [pdf]
  20. * Sévellec, F. and B. Sinha, 2018: Predictability of Decadal Atlantic Meridional Overturning Circulation Variations, Oxford Encyclopedia of Climate Science, Oxford University Press, doi: 10.1093/acrefore/9780190228620.013.81
  21. † Germe, A., F. Sévellec, J. Mignot, A. V. Fedorov, S. Nguyen, and D. Swingedouw, 2018: The impacts of oceanic deep temperature perturbations in the North Atlantic on decadal climate variability and predictability, Climate Dynamics, 51, 2341-2357. [pdf]
  22. Sévellec, F., H. A. Dijkstra, S. S. Drijfhout, and A. Germe, 2018: Dynamical attribution of oceanic prediction uncertainty in the North Atlantic: application to the design of optimal monitoring systems, Climate Dynamics, 51, 1517-1535. [pdf]
  23. 2017:

  24. Sévellec, F., A. V. Fedorov, and W. Liu, 2017: Arctic sea ice decline weakens the Atlantic Meridional Overturning Circulation, Nature Climate Change, 7, 604-610. [pdf, si]
  25. Sévellec, F., A. Colin de Verdière, and M. Ollitrault, 2017: Evolution of intermediate water masses based on Argo float displacements, J. Phys. Oceanogr., 47, 1569-1586. [pdf]
  26. Sévellec, F. and A. V. Fedorov, 2017: Predictability and decadal variability of the North Atlantic ocean state evaluated from a realistic ocean model, J. Climate, 30, 477-498. [pdf]
  27. † Germe, A., F. Sévellec, J. Mignot, D. Swingedouw, and S. Nguyen, 2017: On the Robustness of near term climate predictability regarding initial state uncertainties, Climate Dynamics, 48, 353-366. [pdf]
  28. 2016:

  29. Sévellec, F., B. Sinha, and N. Skliris, 2016: The rogue nature of hiatuses in a global warming climate, Geophys. Res. Lett., 43, 8169-8177. [pdf, si]
  30. Sévellec, F. and A. V. Fedorov, 2016: AMOC sensitivity to surface buoyancy fluxes: Stronger ocean meridional heat transport with a weaker AMOC?, Climate Dynamics, 47, 1497-1513. [pdf]
  31. Sévellec, F. and T. Huck, 2016: Geostrophic closure of the zonally-averaged Atlantic Meridional Overturning Circulation, J. Phys. Oceanogr., 46, 895-917. [pdf]
  32. 2015:

  33. Sévellec, F. and A. V. Fedorov, 2015: Unstable AMOC during Glacial Intervals and millennial variability: the role of mean sea ice extent, Earth and Planetary Science Letters, 429, 60-68. [abstract | pdf]
  34. Ortega, P., J. Mignot, D. Swingedouw, F. Sévellec, and E. Guilyardi, 2015: Reconciling two alternative mechanisms behind bi-decadal AMOC variability, Prog. Oceanogr., 137, 237-249. [pdf]
  35. Sévellec, F., A. C. Naveira Garrabato, J. A. Brearley, and K. L. Sheen, 2015: Vertical flow in the Southern Ocean estimated from individual moorings, J. Phys. Oceanogr., 45, 2209-2220. [pdf]
  36. Sévellec, F. and T. Huck, 2015: Theoretical investigation of the Atlantic multidecadal oscillation, J. Phys. Oceanogr., 45, 2189-2208. [pdf]
  37. * Sévellec, F. and A. V. Fedorov, 2015: Optimal excitation of AMOC decadal variability: links to the subpolar ocean, Prog. Oceanogr., 132, 287-304. [abstract | pdf]
  38. Huck, T., O. Arzel, and F. Sévellec, 2015: Multidecadal variability of the overturning circulation in presence of eddy turbulence, J. Phys. Oceanogr., 45, 157-173. [pdf]
  39. 2014:

  40. Sévellec, F. and A. V. Fedorov, 2014: Millennial variability in an idealized ocean model: predicting the AMOC regime shifts, J. Climate, 27, 3551-3564. [abstract | pdf]
  41. Manucharyan, G., W. Moon, F. Sévellec, A. Wells, J-Q. Zhong, and J. Wettlaufer, 2014: Steady turbulent density currents on a slope in a rotating fluid, J. Fluid Mech., 746, 405-436. [abstract | pdf]
  42. 2013:

  43. Sévellec, F., J. J.-M. Hirschi, and A. T. Blaker, 2013: On the near-inertial resonance of the Atlantic meridional overturning circulation, J. Phys. Oceanogr., 43, 2661-2672. [abstract | pdf]
  44. Sévellec, F. and A. V. Fedorov, 2013: Model bias reduction and the limits of oceanic decadal predictability: importance of the deep ocean, J. Climate, 26, 3688-3707. [abstract | pdf]
  45. Sévellec, F. and A. V. Fedorov, 2013: The leading, interdecadal eigenmode of the Atlantic meridional overturning circulation in a realistic ocean model, J. Climate, 26, 2160-2183. [abstract | pdf]
  46. 2011:

  47. * Sévellec, F. and A. V. Fedorov, 2011: Stability of the Atlantic meridional overturning circulation in a zonally-averaged ocean model: the effects of freshwater flux, wind stress, and diapycnal diffusivity, Deep Sea Res. II, 58, 1927-1943. [abstract | pdf]
  48. 2010:

  49. Sévellec, F., T. Huck, and A. Colin de Verdière, 2010: From centennial to millennial oscillation of the thermohaline circulation, J. Mar. Res., 68, 597-624. [abstract | pdf]
  50. * Sévellec, F. and A. V. Fedorov, 2010: Excitation of SST anomalies in the eastern equatorial Pacific by oceanic optimal perturbations, J. Mar. Res., 68, 723-742. [abstract | pdf]
  51. 2009:

  52. Sévellec, F., T. Huck, M. Ben Jelloul, and J. Vialard, 2009: Non-normal multidecadal response of the thermohaline circulation induced by optimal surface salinity perturbations, J. Phys. Oceanogr., 39, 852-872. [abstract | pdf]
  53. 2008:

  54. Sévellec, F., T. Huck, M. Ben Jelloul, N. Grima, J. Vialard, and A. Weaver, 2008: Optimal surface salinity perturbations of the meridional overturning and heat transport in a global ocean general circulation model, J. Phys. Oceanogr., 38, 2739-2754. [abstract | pdf]
  55. 2007:

  56. Sévellec, F., 2007: Variabilité basse fréquence endogène et exogène de la circulation thermohaline, Ph.D. thesis, Université de Bretagne Occidentale, Brest, France, 196pp. [abstract | pdf]
  57. Sévellec, F., M. Ben Jelloul, and T. Huck, 2007: Optimal surface salinity perturbations influencing the thermohaline circulation, J. Phys. Oceanogr., 37, 2789-2808. [abstract | pdf]
  58. 2006:

  59. Colin de Verdière, A., M. Ben Jelloul, and F. Sévellec, 2006: On the bifurcation structure of thermohaline millennial oscillation, J. Climate, 19, 5777-5795. [abstract | pdf]
  60. Sévellec, F., T. Huck, and M. Ben Jelloul, 2006: On the mechanism of centennial thermohaline oscillations, J. Mar. Res., 64, 355-392. [abstract | pdf]

Submitted publications

  • Sévellec, F., A. Colin de Verdière, and N. Kolodziejczyk, 2022: Global Observations of Deep Ocean Kinetic Energy Transfers, submitted to J. Phys. Oceanogr.

Professional experience

  • Research Scientist [Chargé de Recherche] in Ocean Physics and Climate Dynamics:
  • Associate Professor in Ocean Physics:
  • Lecturer in Physical Oceanography:
  • Laboratory associate in Ocean and Climate Dynamics:
    • Oceanic predictability and initial condition uncertainty in the ocean,
      in collaboration with Alexey Fedorov; Feb. 2012 - Jan. 2013 (G&G, Yale, USA).
  • Postdoc in Ocean and Climate Dynamics:
    • Oceanic predictability and initial condition uncertainty in the ocean,
      with Alexey Fedorov; Mar. 2008 - Dec. 2011 (G&G, Yale, USA).
  • Postdoc in Physical Oceanography:
    • on Optimal sea surface perturbation, phase locking, and seasonal predictability barrier of ENSO,
      with Jérôme Vialard; Jan. 2007 - Mar. 2008 (LOCEAN - IPSL, UPMC, Paris, France).
  • PhD in Physical Oceanography:
  • CTD watch on an oceanographic cruise, OVIDE, from Greenland to Portugal, June 2004:
    • Contribution to the monitoring of the inter-annual variability of the water masses as well as the mass, heat, and tracer transports in the northern North Atlantic Ocean.
  • Master training:
    • Stability and variability of the thermohaline circulation in box models, Feb.-Sept. 2003 (LPO, UBO, Brest, France) [pdf, internal publication in french, 37pp].
    • Stability and variability of an antisymmetric configuration of two gyres in a quasi-geostrophic model, May-Aug. 2002 (LPO, UBO, Brest, France) [pdf, internal publication in french, 25pp].

Teaching experience

  • Seminar Instructor:
    • In Advanced Methods in Physical Oceanography (teaching material), for master program in ocean physics, 2018-2022 (UBO, Brest, France).
    • In Advanced Methods in Physical Oceanography (SOES6027), for postgraduate program in oceanography, 2015-2017 (University of Southampton, UK).
    • In Climate Dynamics (SOES6006), for postgraduate program in oceanography, 2015-2017 (University of Southampton, UK).
    • In Global Ocean Monitoring (SOES6027), for postgraduate program in oceanography, 2013 & 2014 (University of Southampton, UK).
    • In Computational Data Analysis: part 3 - Signal Processing (SOES3042 & SOES6025), for undergraduate and postgraduate program in oceanography, 2012 & 2013 (University of Southampton, UK).
    • In Ocean & Atmosphere dynamics: Essential Papers (G&G 742a), co-taught with M.-L. Timmermans, for postgraduate program in geology and geophysics, 2010 (Yale University, CT, USA).
  • Guest Lecturer:
    • Training in Data Analysis (LOPS, France).
      • Predictive Analysis with Transfer Operators and Analog Methods (teaching material).
    • In Large Scale Ocean Processes (SOES3010 & SOES6005), for undergraduate and postgraduate program in oceanography, 2012 & 2013 (University of Southampton, UK).
      • Lectures 10 & 11 on The Role of Mixing in Ocean Circulation.
    • In Climate Dynamics (SOES6006), for postgraduate program in oceanography, 2012, 2013 & 2014 (University of Southampton, UK).
      • Lectures 8 & 9 on the Meridional Overturning Circulation Stablity. (2012, 2013 & 2014)
      • Lecture 12 on Climate modeling (2012 & 2014).
      • Lecture 13 on Climate variability (2012 & 2014).
    • In Physical Oceanography (G&G 535/335), for postgraduate program in geology and geophysics, 2011 (Yale University, CT, USA).
      • Lecture on the ThemoHaline Circulation.
    • In Climate Modeling (F&ES 771a), for master program in environmental management, 2011 (Yale University, CT, USA).
    • In Physical Oceanography (G&G 535/335), for postgraduate program in geology and geophysics, 2010 (Yale University, CT, USA).
      • Lectures 21 & 22 on the Ocean Waves.
    • In Theory of Climate (G&G 523/323), for postgraduate program in geology and geophysics, 2009 (Yale University, CT, USA).
      • Lecture 15 on the Ocean General Circulation,
      • Lecture 18 on the Meridional Overturning Circulation and ThermoHaline Circulation.
  • Teaching Assistant:
    • In Nonlinear Dynamics and Chaos for undergraduate, third year of bachelor, 2005 (UBO, Brest, France).
    • In Atmospheric Dynamics for postgraduate program in physical oceanography, 2004 (UBO, Brest, France).

Education

2018 Habilitation à Diriger de Recherches (HDR), UBO, Brest, France. [pdf]
[HDR is the highest university degree in France which accredits to supervise alone PhD students.]
2015 Fellow of the Higher Education Academy, UK;
2003-2007 PhD in physical oceanography, UBO, Brest, France. [pdf]
2002-2003 1-year research oriented postgraduate diploma in physical oceanography, UBO, Brest, France.
2001-2002 1-year master's degree in physics, UBO, Brest, France.
1998-2001 3-year bachelor of science degree in physics, UBO, Brest, France.
1998 Baccalaureat in sciences (Mathematics, Physics and Chemistry), french final high-school diploma.


Hobbies

  • Brazilian Jiu-Jitsu:
  • Rugby:
    • the Brest Université Club (BUC) ,
    • a complete site on all professional rugby championships and tournaments planet-rugby,
    • my favourite french team the Stade Toulousain.
  • Music:
    • La Carène (music center, Brest, France), local rehearsal and recording studios and music events,
    • Gibson, my favourite guitar brand (and obviously the best one!!!).

Useful websites

Google (scholar), Internet search engine.
wikipedia logo Wikipedia, the free encyclopedia that anyone can edit.
unix logo Unix, is a free computer operating system.
fink logo Fink, wants to bring the full world of Unix Open Source software to Darwin and Mac OS X.
idris logo IDRIS, French institude for development of the scientific computer.
nemo logo NEMO, a Nucleus for European Modelling of the Ocean (particularly OPA an Ocean General Circulation Model),
LaTeX FAQ (in french).



updated 22sep2022 logo