Understanding the French ocean with Stephen Griffies
As part of the Choose France for Science programme, France welcomes leading international researchers to strengthen its scientific excellence. Among them is Stephen Griffies, a world-renowned oceanographer hosted by the French Oceanography and Climate Laboratory (LOCEAN), who is putting his expertise to work on a major challenge: better understanding how the ocean works in order to anticipate climate change.
Training and supporting the next generation of scientists
Stephen Griffies aims to train, support and inspire researchers and engineers at all stages of their careers. By developing skills and sharing innovative methods, he is helping to strengthen the French ocean science community in the long term.
This commitment is part of a drive to increase the potential for innovation and discovery in France by promoting the emergence of collective expertise.
Developing new tools to understand ocean circulation
The ocean plays a central role in regulating the climate. However, its mechanisms remain highly complex. Stephen Griffies works on developing innovative analytical methods to better understand ocean circulation and its interactions with the climate.
His work draws on:
- the theory of water mass transformation to analyse circulation, heat exchange and regional sea level rise
- the study of vorticity (the property of a moving fluid to generate or maintain a vortex) in order to understand the mechanics of currents in simulations
- the use of Green's functions, mathematical tools for analysing ocean ventilation and circulation time scales
These approaches offer new insights into the most advanced climate models, identifying their biases and improving their configuration.
Unlocking the secrets of an ever-changing ocean
The ocean is an extraordinarily complex dynamic system. Waves, turbulence and large currents interact at different scales, emerging from the fundamental laws of fluid mechanics on a rotating planet.
Stephen Griffies' research explores these mechanisms using cutting-edge numerical simulations and observational data. The aim is to understand the inner workings of the ocean and to translate these discoveries into concrete improvements in global climate models.
His work has direct implications for major tools such as the NEMO (Nucleus for European Modelling of the Ocean) ocean model, widely used by the international scientific community to simulate ocean circulation and its interactions with the atmosphere.
Curiosity-driven science for climate action
Through curiosity-driven research, Stephen Griffies helps answer fundamental questions.
The answers he provides help improve the reliability of climate projections, thereby informing public decisions on climate change.
By joining the Choose France for Science programme, Stephen Griffies exemplifies France's ambition to make research a strategic lever for understanding, anticipating and acting on major global issues.