- The MSDAG project is supported scientifically and financially by
the Agence Nationale de la Recherche (French research agency)
[ ANR ],
through the call "Programme systèmes
complexes et modélisation mathématique" (complex systems and
mathematical modeling program) [
- Objective :
Changing scale is a well-known topic in physics (geophysics, fluid
mechanics and turbulence, theoretical and statistical physics,
mechanics, porous media, etc.) It has lead to the creation of powerful
sophisticated mathematical tools: renormalization, homogenization,
These ideas are also used in numerical analysis (the so-called multigrid approach)
for solving efficiently partial differential equations.
Data assimilation in geophysics is a set of methods that allows to
combine optimally numerical models in large spaces with large dataset
At the confluence of these two topics,
the goal of this project is to study how to embed the change of scales
(a multiscale point of view)
issue into the framework of geophysical data assimilation, which
is a largely unexplored subject.
- Targeted application areas:
atmospheric chemistry (greenhouse gases, air quality),
where the issue of the right resolution of the numerical control space
variables has been discussed for 10 years without a definitive answer.
- oceanography where the first numerical experiments tackling the
problem have been conducted.
- in the image processing, where questions related to this issue
start being understood.
- École des Ponts ParisTech et EDF R&D.
CEREA, joint laboratory École des Ponts ParisTech / EDF R&D.
Project-team CLIME of l'INRIA and l'École des Ponts ParisTech.
- INRIA Rennes, Project-team VISTA, with a contribution from CEMAGREF.
- INRIA Rhônes-Alpes and Université Joseph Fourier. Jean
Kunzmann laboratory. Project-team MOISE.
- Commissariat à l'Énergie Atomique and CNRS. LSCE, Laboratoire des
sciences du climat et de l'environnement, within IPSL.