Dr. Abdessamad Qaddouri

Research Scientist - Numerical Atmospheric Modelling

Current research and/or projects

Research in numerical weather prediction;development of parallel algorithms and their efficient implementation in the Canadian atmospheric model GEM

  • Linear algebra applied to meteorology, direct or iterative solvers
  • Parallel computing and development of parallel preconditioners based on domain decomposition methods
  • Conservation in Semi-Lagrangian transport method
  • Cosupervisor of Post-Docs

Professional activities / interests

Former member of theWorking Group on Numerical Experimentation (WGNE)of the World Meteorological Organization (WMO)

Education and awards

Ph. D. (1998), Numerical Physics, Université de Montréal, QC

M.Sc. (1992), Nuclear Engineering, Ecole polytechnique de Montréal, QC

Key publications

Qaddouri,A., J.Pudykiewicz,M.Tanguay,C.Girard, and J.Cote.2012.Experiments with different discretizations for the Shallow-Water equations on the sphere.
Quart. J. Roy. Meteor. Soc., 138, 665, 989-1003.

Qaddouri, A . 2011. Nonlinear shallow-water equations on the Yin Yang grid. Quart.J.Roy.Meteor.Soc., 137, 656, 810-818.

Qaddouri, A. and Lee,V. 2011. The Canadian Global Environmental Multiscale model on the Yin-Yang grid system, Quart. J. Roy. Meteor. Soc., 137, 660, 1913-1926.

Loisel S., J.Cote, M.J.Gander, L.Laayouni, and A.Qaddouri, 2010. Optimized domain decomposition methods for the spherical Laplacian. SIAM J. NUMER. ANAL., 48, 2, 524-551

Qaddouri A., and V.Lee, 2010.The Elliptic Solvers in the Canadian Limited Area Forcasting Model GEM-LAM. Modeling, Simulation and Optimization, Tolerance And Optimal Control, Dr. Sc. Shkelzen Cakaj Edt, In-Tech publisher: ISBN 978-953-307-056-8, pp. 109-124.

Qaddouri, A. 2008. Optimized Schwarz Methods with Ying-Yang grid for Shallow Water equations. Domain Decomposition Methods in Science and Engineering XVII, Lecture Notes in Computational Science and Engineering 60, Springer Verlag, 347-353.

Qaddouri A., L. Laayouni, J. Côté and M.J. Gander. 2008. Optimized Schwarz methods with an overset grid for the shallow-water equations: preliminary results. IMACS Journal of Applied Numerical Mathematics. , 58, 4, 459-471 doi:10.1016/j.apnum.2007.01.015.

Mahidjiba, A., A.Qaddouri, and J.Cote, 2008. Application of the Semi-Lagrangian Inherently Conserving and Efficient (SLICE) Transport Method to Divergent Flows on a C Grid Mon.Wea.Rev,136,4850-4866 

Qaddouri, A., and V.Lee, 2008. Solution of the implicit formulation of high order diffusion for the Canadian Atmospheric GEM model. Proc. 2008 Spring Simulation Multiconf., High Performance Computing Symp., J. A. Hamilton, Jr. et al. (eds), Soc. For Modeling and Simulation Internat., Ottawa, Canada, 2008, pp. 362-367.

Qaddouri A. and J. Côté. 2004. Optimization of a direct elliptic boundary value problem solver by the combined use of symmetry and Strassen’s algorithm. Mon. Wea. Rev. 132:2708-2713.

Qaddouri A. and J. Côté. 2003. Preconditioning for an Iterative Elliptic Solver on a Vector Processor. Proceedings VECPAR 2002 (PORTO), Springer Verlag. LNCS 2565:343-353.

Qaddouri A., J. Côté and M. Valin. 2000. A parallel direct 3D elliptic solver. In "High performance computing systems and applications" eds A. Pollard, D. J. K. Mewhort, D. F. Weaver. Kluwer Academic Publishers, 429-442.

Research facility

2121, route Transcanadienne
Dorval, QC H9P 1J3


Canadian Meteorological and Oceanographic Society