The Workshop on Developments in Numerical Methods for Very High resolution global models was held from 5 to 7 June 2000.
With the increase of computational power available to ECMWF, more and more accurate forecasts are in principle possible by increasing the resolution of the forecast model, as long as the numerical techniques used in the integration of the equations continue to be accurate and efficient for the intended resolution.
For a long time there has been concern whether the spectral technique will continue to be competitive at higher resolutions. Alternatives such as faster Legendre transformed, double Fourier series or icosahedral grids have been proposed. The semi-implicit method used at ECMWF might not be accurate enough for higher resolutions and a more implicit method could well be needed . Also at higher resolutions non hydrostatic effects might have to be taken into consideration.
It was therefore timely to hold a workshop with the aim of looking into the future of numerical techniques and exploring new ideas to guide us in further improvement of the model from the point of view of accuracy and efficiency.
The workshop followed the usual pattern of one and a half days of lectures of followed by the extended abstracts of the invited lectures.
HIRLAM: Recent activities and future plans in high resolution and numerics
High resolution tests of the (IFS)/ARPEGE/ALADIN dynamics using a quasi-academic case
Geometric integration and its applications
C J Budd
Towards a mesoscale global forecast model at the Canadian Meteorological Center
Key numerical issues for the future development of the ECMWF numerical model
Some aspects of high resolution NWP at the Met Office
The contour-advective semi-Lagrangian algorithm: keeping the balance
D G Dritschel
The Meso-NH atmospheric simulation system as a research tool at mesoscale
J P Lafore
The global icosahedral-hexagonal grid point model GME - operational version and high resolution tests
Variational methods for elliptic problems in fluid models
P K Smolarkiewicz
The double Fourier model: a faster spectral dynamical core
W F Spotz
Can spectral methods on the sphere live forever?
Preconditioned iterative methods for implicit equations
A J Wathen