WWRP/THORPEX WORKSHOP on 4D-VAR and
ENSEMBLE KALMAN FILTER INTER-COMPARISONS

BUENOS AIRES - ARGENTINA, 10-13 NOVEMBER 2008

PROGRAMME

 

Last Updated: 12 November 2008

lectures also availables:  ftp://ftp.cima.fcen.uba.ar/pub/4dvarenkf
Monday 10 November
 
  Session 1: Introductory review
  9:00 Welcoming and Opening of the Workshop
  9:30 Status of 4D-Var:      E. Andersson (ECMWF)
  10:15 Break
  10:45 Status of EnKF   P. Houtekamer (EC)
  11:30 Posters
 
  Lunch 12:30 – 14:00
 
  Session 2: Balance
  14:00

Posters

  15:00

Chair: R. Errico (NASA) 
Consideration of Dynamical Balances  

  15:30

Balance in 4DVAR    (sources of imbalances and treatments). S. Polavarapu* (EC)
  16:00

Balance in EnKF     (sources of imbalances and treatments).
   J. Kepert (BOM)
  16:30 Break
  17:00-18:30  Discussions  
 
  Dinner 20:00
 
Tuesday 11 November
 
  Session 3: Issues of nonlinearity and non-gaussianity
  Chair: M. Bocquet (Universite Paris-Est and INRIA)
  9:00 Posters
  9:45 Issues of nonlinearity and non-gaussianity.  M. Bocquet
  10:15 Break
  10:45 How does 4DVAR handle this ?   M. Fisher (ECMWF)
  11:15 How do Kalman Filters handle this ?  SC. Yang
   (National Central University, Taiwan)
  11:45  Discussions
 
  Lunch 12:30 – 14:00
 
  Session 4: Model error and data assimilation
  Chair: C. Snyder (MMM/NCAR) *
  14:00 Posters
  15:00 Treatment of model error in 4DVAR. Y. Tremolet (ECMWF)
  15:30 Treatment of model error in EnKF.    E. Kalnay * (U of Maryland)
  16:00 Break
  16:30-17:30 Discussions
 
  Dinner 20:00
 
Wednesday 12 November
 
  Session 5: Background error estimation
  Chair: R. Todling (NASA)
 
  9:00 Posters
  9:30 Filtering of variances and correlations by local spatial averaging.    L. Berre (Meteo-France)
  10:00 Schur product techniques.   T. Hamill (NOAA)
  10:30 Break
  11:00 Flow adaptive correlation localization.    C. Bishop (NRL)
  11:30 Discussions
 
  Lunch 12:30 – 14:00
 
  Session 6: Computational Issues
  Chair: R. Gelaro (NASA)
  14:00 Posters
  15:00 Computational issues in general.   A. Lorenc (Met Office)
  15:30 Break
  16:00 Computational issues for a variational system. Y. Sato (NCEP)
  16:30 An EnKF perspective (any fundamental issues or pitfalls?).
     J. Whitaker (NOAA), TBC
  17:00-18:30  Discussions
 
  Dinner 20:00
 
Thursday 13 November
   
  Session 7: Validation and intercomparations
  Chair: F.  Zhang (Penn State University)
  9:00 Posters
  9:45 Validation (proper interpretation of various metrics).     O. Talagrand* (Laboratoire de Meteorologie Dynamique, Paris)
  10:15 Break
  10:45 VAR/En_KF intercomparison for limited area mesoscale models.   F. Zhang
  11:15 Appropriate comparisons of full systems.    M. Buehner (EC)
  11:45 Discussions
 
  Lunch 12:30 – 14:00
 
  Session 8: Synergistic
  Chair: I. Szunyogh (U. of Maryland)
  14:00 Posters
  15:00 Synergistic approaches    I. Szunyogh
  15:30 How 4DVAR can benefit from or contribute to EnKF (a 4DVAR perspective).    D. Barker (NCAR)*
  16:00 How EnKF can benefit from or contribute to 4DVAR (an EnKF perspective).   Miyoshi * (JMA)
  16:30 Break
  17:00 Discussions
  18:30 Closing of Workshop
 
  Dinner 20:00
 

* : Lecturer at the Intensive Course on Data Assimilation