1 July - 19 December 1996

**Organisers**:JCR Hunt (*UK Meteorological Office*), ME McIntyre (*Cambridge*), J Norbury (*Oxford*), I Roulstone (*UK Meteorological Office*)

- 9.30-10.00 M. Fisher (ECMWF)
*Estimating covariances of analysis and forecast error in variational data assimilation*- 10.00-10.30 R. Menard (NASA/Goddard)
*Theoretical and numerical properties of error covariances in a stratospheric tracer assimilation problem*- 11.00-12.00 G. Wahba (Wisconsin)
*Adaptive tuning of dynamical systems equations*- 14.00-14.30 F. Bouttier (ECMWF)
*Modelization of forecast error covariances*

- 9.30-10.30 P. Courtier (CNES)
*Data assimilation and baroclinic instability*- 11.00-11.30 R. Todling (NASA/DAO)
*Estimation theory in atmospheric data assimilation: simplified methods for filtering and smoothing*- 11.30-12.00 G. Evensen (Nansen Environmental)
*Mathematical formulation and minimization of weak constraint variational inverse methods for nonlinear dynamics*- 14.00-15.00 J. Purser (NCEP)
*The Representer approach for Weak-Constraint Four-Dimensional Variational Assimilation*- 15.30-16.00 A. Griffith and N. Nichols (Reading)
*Treating model error in variational data assimilation*- 16.00-16.30 T. Prager (Budapest)
*Some comments on the time limits of applicability of tangentlinear and adjoint models for dynamical systems with mulitple time scales*

- 9.30-10.30 F. Le Dimet (Grenoble)
*Second order information in variational data assimilation*- 11.00-11.30 F. Rabier (ECMWF)
*Four-dimensional variational assimilation: experimental results at ECMWF*- 11.30-12.00 F. Veerse (Meteo France)
*Multi-incremental strategies for variational data assimilation*

- 09.30-10.30 P. Gauthier (ARMA/SEA)
*Data assimilation in nonlinear flows with a wide range of scales*- 11.00-11.30 M. Bell (UKMO)
*A global ocean data assimilation system: some results, problems and questions*- 11.30-12.00 R. Hindmarsh (British Antarctic Survey)
*Use of ice sheet normal modes for initialisation and modelling small changes*- 14.00-14.30 E. Remy (IFREMER)
*Assimilation of acoustic tomography data: simulations in a Q.G. model*- 14.30-15.00 B. Urban (Meteo France)
*3D data assimilation of atmospheric humidity using a maximum entropy method*- 15.30-16.00 G. Kivman (Shirshov Institute)
*Assimilating data into an Arctic Ocean tide model*- 16.00-16.30 M-M Lee (Southampton)
*Inferring sub-surface eddy fields from the Sea Surface Height Anomaly*

- 10.00-10.30 I. Roulstone (UKMO)
*A Hamiltonian approach to balance conditions*- 11.00-11.30 V. Gordin (Hydrometeorological Centre, Russia)
*Variational-statistical approaches the the data assimilation problems*- 11.30-12.00 D. Barker (UKMO)
*The UKMO's atmospheric 3DVAR system -- formulation and initial results*- 14.00-15.00 M. Cullen (UKMO)
*How can mathematical research help weather forecasting and climate modelling?*