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Environment

The environment research area

The environment research area is part of the MODEST Challenge. It lies at the crossroads of transverse axes “Data assimilation and optimization” and “Uncertainties“.

Within this axis, CERFACS teams conduct scientific studies in various fields of geosciences. Researchers and engineers develop modeling tools,  implement data assimilation methods, run coupled models (multi-physical and / or multi-dimensional) and study the sources of uncertainty on systems. One goal is to apply this research in operational systems in a national and international context.

The methods of applied mathematics used here,  such as coupling or data assimilation,  are at the center of research works in the fields of oceanography, atmospheric chemistry, hydrology and forest fires.

Hydrology and hydraulics

Flood forecasting is a major natural hazard for the safety of goods and people. Actors in risk management and stakeholders in water resource management feature modeling tools and in situ observation network to simulate the flow dynamics. The capabilities of hydrological and hydrodynamic models are limited by several factors of uncertainty related to the description of the bathymetry / topography, hydraulic and hydrological parameters, or the terms of forcings such as hydrological flows and rainfall. These uncertainties can be reduced through data assimilation (in-situ and satellite), as implemented in the DAMP platform (Data Assimilation with MASCARET Platform).

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Forest fires

Predicting the behavior of a large-scale fire depends on a semi-empirical modeling of the propagation of a front (i.e. the interface between burned and unburned areas) involving the vegetation data description, geomorphology and meteorology, however tainted by various sources of error. CERFACS develops the ensemble data assimilation system  FIREFLY to sequentially correct the fire front parameters and position, and thus improve the predictive ability of the propagation models over the acquisition of observations on the front position.

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NEWS

Cerfacs’ kraken configuration upgrade to more than 500 Tflop/s

superadmin |  2 October 2019

64 skylake nodes have been added to Cerfacs' cluster Kraken which offer now more than 7 000 skylake cores and 563 peak Tflop/s.Read more


67 climate modelling groups use OASIS3-MCT to assemble more than 80 coupled applications

superadmin |  10 September 2019

OASIS3-MCT is a coupler of codes developed at Cerfacs and used around the world, mainly for climate modelling applications. Our last survey confirms that OASIS3-MCT is used by 67 modelling groups to assemble more than 80 different coupled applications over the 5 continents. These applications include global or regional configurations of ocean and atmosphere models but also sea ice, sea level, wave, ocean biogeochemistry, land, vegetation, river routing, hydrological and atmospheric chemistry models. OASIS3-MCT is used in 5 of the 7 European Earth System Models participating to the 6th Coupled Model Intercomparison Project (CMIP6) that produces the climate simulations forming the basis of the next report of the Intergovernmental Panel on Climate Change (IPCC)”Read more

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