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From 20 June 2017 at 09h40 to 21 June 2017

AVENUE Project Workshop : June 20-21, 2017

Brigitte Yzel |  Cerfacs, Salle de Conférence JCA |  






AVENUE Project Workshop at Cerfacs

June 20-21, 2017


with Presentations attached



Tuesday, June 20

09:00 – 09:40: Registration & Coffee

09:40 – 10:30: Andrew Lorenc (Met-Office) “Improving the ensemble covariances used in the Met Office global hybrid-4DVar”
10:30 – 11:20: Jean-François Caron (Environment Canada) “Scale-Dependent Localization in Ensemble-Variational Data Assimilation: Application in Global and Convective-Scale NWP systems”
11:20 – 11:50: Anthony Weaver (CERFACS) “Ensemble-variational assimilation with NEMOVAR: Part 1: design aspects and illustrations”
11:50 – 12:20: Marçin Chrust (ECMWF) “Ensemble-variational assimilation with NEMOVAR: Part 2: experiments with the ECMWF system”

12:20 – 14:00: Lunch Break

14:00 – 14:50: Alberto Carrassi (NERSC) “Dynamics‐based reduction of data assimilation for chaotic models”

15:40 – 16:10: Coffee break

16:10 – 17:00: David Titley-Peloquin (McGill University) “Towards the estimation of optimal covariance matrices in multi-ensemble data assimilation”
17:00 – 17:30: Francois Mercier (Météo-France) “Block Krylov methods for ensemble variational data assimilation in weather prediction systems”
17:30 – 18:00: Alina Barbu (CNES-GET) “Efficient QR Sequential Least Square algorithm for high frequency GNSS Precise Point Positioning seismic application”


Wednesday, June 21


09:00 – 09:50: Gerald Désroziers (Météo-France) “Development of 4DEnVar at Météo-France”
09:50 – 10:40: Patrick Laloyaux (ECMWF) “The ECMWF weak constraint 4D-Var formulation”
10:40 – 11:20: Emanuele Emili (CERFACS) “Accounting for model error in air quality forecasts: an application of 4DEnVar to the assimilation of atmospheric composition using QG-Chem”


11:20 – 12:30: Coffee Break and discussions



New regional climate projections for metropolitan France

superadmin |  11 February 2021

Cerfacs collaborated with Météo France and the Institut Pierre-Simon-Laplace (IPSL) to produce the DRIAS climate dataset, which presents a wide range of possible climate changes for metropolitan France for three periods of the 21st century (2021-2050, 2041-2070 and 2071-2100) and three greenhouse gas emission scenarios. Liens : .pdfRead more

New research group “Theory and Climate”

Mélanie ROCHOUX |  1 February 2021

CECI is involved in the development of a new research group (GDR for “Groupement De Recherche”) entitled “Theory and Climate”. This GDR aims at bringing together the entire community of theorists (mathematicians, physicists, computer scientists, data scientists, etc.) working on climate sciences, with the goal of developing and sharing innovative concepts and tools relevant for a better understanding of climate dynamics. This GDR is interdisciplinary and involves several CNRS research institutes as well as most of French organizations working in these fields. CECI plans to contribute to issues related to climate dynamics and applied mathematics such as data assimilation and machine learning. Moreover, there are strong links between this GDR and the LEFE-INSU actions, in which CECI researchers are active (LEFE-IMAGO and LEFE-MANU actions). More information here:Read more