Team Dynamique

Scientific Themes

The Dynamique team focuses on the fine-scale dynamics (turbulent and convective) of the atmosphere and ocean, as well as continental and oceanic surface interactions.

The team studies dynamics through the synergy of observation and modeling. It relies on observations from the P2OA Instrumented Site, including long-term measurement series, the MAP-IO National Instrument, the PCOA, and field campaigns. It also utilizes community codes such as Méso-NH and CROCO, particularly their capabilities for Large-Eddy Simulations (LES) and coupled ocean-wave-atmosphere simulations, supported by the NUWA modeling platform.

The Dynamique team brings together researchers and engineers to study and understand fine-scale circulations and surface interactions. It includes personnel from the CRA site, leveraging their observational expertise in atmospheric boundary layer processes to strengthen ties with the numerical expertise of the Toulouse site in fine-scale oceanic and atmospheric processes.

The Dynamique team is led by Florian Pantillon.

Dynamique News

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Services

The Dynamique team oversees (or co-oversees):

  • The P2OA Instrumented Site
    contact: François Gheusi
  • The MAP-IO National Instrument
    contact: Pierre Tulet
  • The Méso-NH Community Code
    contact: Jean-Pierre Chaboureau
  • The CROCO Community Code
    contact: Francis Auclair

Projects

Fine-scale circulations can drive the formation of surface winds in extratropical storms. The ANR-DFG DICHOTOMI project deploys the French research aircraft ATR42 and the German Cessna F406, along with two ground-based observation platforms during the international NAWDIC campaign in the North Atlantic in the winter of 2025-26. The goal is to better understand fine-scale wind structures in the cloud head and dry intrusion of storms.

The Dynamique team relies on these observations and Méso-NH LES-type simulations to study the contribution of dynamic processes, microphysical processes (in collaboration with the Nuages team), and air-sea exchanges to the formation of surface winds. (Contact: Florian Pantillon)

The representation of surface-atmosphere interactions is the second-largest source of error in numerical weather and climate prediction models. One major challenge lies in accurately capturing surface heterogeneity and the atmospheric processes it generates.

The measurement campaigns of the MOSAI and LIAISE projects are leveraged to:

  1. Quantify the impact of surface heterogeneities on energy transport within the atmospheric boundary layer and the feedback of these transports on surface exchanges,
  2. Assess the effects of neglecting these heterogeneities in large-scale models,
  3. Improve their representation in such models, and
  4. Evaluate large-scale numerical models using long-term measurements from ACTRIS sites (e.g., P2OA, SIRTA, Météopole). (Contact: Fabienne Lohou)

The Dynamique team focuses on submesoscale oceanic processes as well as acoustic and gravity waves. Their approach is based on Large-Eddy Simulations (LES) using the compressible, non-hydrostatic core of CROCO.

At local, regional, and Mediterranean basin scales (as part of the ANR MOTIONS project), decametric CROCO simulations—locally refined and coupled with a simplified atmospheric boundary layer model (ABL1D/3D)—serve as a framework for studying the feedback of submesoscale dynamics on water mass characteristics and ocean circulation.

At the ocean-atmosphere interface, coupled CROCO-Méso-NH simulations help better understand the impact of gravity waves and their breaking on the properties of the oceanic mixed layer. (Contact: Francis Auclair)

Ongoing PhDs

NomSujetEncadrant-e-s
Nefeli BoscoloImpact de l’irrigation et des hétérogénéités de surface sur les processus de la couche limite atmosphérique en milieu semi-arideMarie Lothon, Guylaine Canut
Héléna GonthierImpacts des embruns marins sur la redistribution d’énergie et de vapeur d’eau dans la couche limite marine en condition de tempêtesPierre Tulet, Sophia Brumer, Joris Pianezze
Faustine HébrardModélisation conjointe de la dynamique océanique et de la propagation acoustique par le code CROCOFrancis Auclair, Pierre-Antoine Dumont
Johan HedmanLe rôle des rouleaux de couche limite dans les rafales de vent à l’échelle urbaineJean-Pierre Chaboureau
Nayl LoiselMesure de paramètre turbulents par Lidar Doppler atmosphériqueMarie Lothon, Guylaine Canut
Florian MéquignonLa vitesse verticale de l’air dans les tempêtes convectives vue par C2OMODOJean-Pierre Chaboureau, Jérémy Richard
Killian PujolApport de l’intelligence artificielle pour la prévision des phénomènes météorologiques intenses en CorseDominique Lambert, Florian Pantillon, Jean-François Muzy
Antoine RoyerObservation et modélisation d’une hétérogénéité de surfaceFabienne Lohou, Sylvain Dupont
Axelle SigotSimulations météorologiques hectométriques pour les extrêmes climatiques urbainsJean-Pierre Chaboureau

Composition

In 2026, the Dynamique team consists of:

  • 9 researchers and lecturer-researchers (including 3 at 50% capacity),
  • 9 engineers and technicians (including 4 at 50% capacity),
  • 14 doctoral and post-doctoral students (including 3 at 50% capacity).
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