Ehouarn Simon

Job Position: 
Researcher
 
Department: 
Mohn-Sverdrup Center for Global Ocean Studies and Operational Oceanography
 
Group: 
Modelling and Data Assimilation Group
 
E-mail: 
 
Phone: 
+47 465 05 891
 
Personal Home Page: 
http://www.nersc.no/page/personal-web-page-ehouarn-simon
 
Field of Research: 
computer science
mathematics
 

Main Research Area

Ocean Modelling, Data Assimilation and Forecasting
  • Multiscale approaches in variational data assimilation: optimal control, 4D-Var, adjoint method, mesh refinement methods for structured grids, multigrid methods.
  • Non-Gaussian approaches in sequential data assimilation : Ensemble Kalman filters, anamorphosis function, combined state and parameter estimation, coupled physical-biogeochemical model.

Project deputy leader of the following projects

  1. CarboChange: Changes in carbon uptake and emissions by oceans in a changing climate
  2. OC-CCI: The ESA Ocean Colour Climate Change Initiative

Peer Review Publications and Books

5 total publications.

2012

  1. Pelc, JS, Simon, E, Bertino, L, El Serafy, G, Heemink, AW . 2012 . Application of model reduced 4D-Var to a 1D ecosystem model . 16 . Ocean Modelling . 57-58
  2. Simon, E, Samuelsen, A, Bertino, L, Dumont, D . 2012 . Estimation of positive sum-to-one constrained zooplankton grazing preferences with the DEnKF: a twin experiment . 16 . Ocean Science . 8
  3. Simon, E, Bertino, L . 2012 . Gaussian anamorphosis extension of the DEnKF for combined state parameter estimation: application to a 1D ocean ecosystem model . 18 . Elsevier . Journal of Marine Systems . 89

2011

  1. Simon, E, Debreu, L, Blayo, E . 2011 . 4D Variational Data Assimilation for Locally Nested Models: complementary theoretical aspects and application to a 2D shallow water model . Wiley-Blackwell . International Journal for Numerical Methods in Fluids . 66

2009

  1. Simon, E, Bertino, L . 2009 . Application of the Gaussian anamorphosis to assimilation in a 3-D coupled physical-ecosystem model of the North Atlantic with the EnKF: a twin experiment . Copernicus Publications on behalf of the European Geosciences Union . Ocean Science . 5

Other Publications and Works

2012

  1. Simon, E, Samuelsen, A, Laurent, B . 2012 . Report on error quantified hindcast with data assimilation (GreenSeas) . 328 . NERSC . NERSC Technical Report

2011

  1. Bertino, L, Evensen, G, Sakov, P, Counillon, F, Simon, E, Bojarova, J, Kvamsdal, S, Wackernagel, H, Lie, I . 2011 . Forecasting non-linear systems with the Ensemble Kalman Filter and related data assimilation methods (eVITA-EnKF) . 325 . 19 . NERSC
  2. Debreu, L, Simon, E, Blayo, E . 2011 . 4D Variational Data Assimilation for Locally Nested Models : optimality system and preliminary numerical experiments. . 7675 . INSTITUT NATIONAL DE RECHERCHE EN INFORMATIQUE ET EN AUTOMATIQUE (INRIA), France

2010

  1. Simon, E, Bertino, L . 2010 . Joint state-parameter estimation in a 3-D coupled physical-ecosystem model of the North Atlantic: assimilation of SeaWiFS data with a non-Gaussian extension of an ESRF . Bergen, June 28 - July 2, 2010 . ESA Living Planet Symposium