edited by Walter Zwieflhofer (European Centre for Medium-Range Weather Forecasts, UK) & George Mozdzynski (European Centre for Medium-Range Weather Forecasts, UK)

Geosciences and, in particular, numerical weather prediction are demanding the highest levels of available computer power. The European Centre for Medium-Range Weather Forecasts, with its experience in using supercomputers in this field, organizes every other year a workshop bringing together manufacturers, computer scientists, researchers and operational users to share their experiences and to learn about the latest developments. This volume provides an excellent overview of the latest achievements and plans for the use of new parallel techniques in the fields of meteorology, climatology and oceanography.

• Early Experiences with the New IBM P690+ at ECMWF (D Salmond & S Saarinen)
• Operation Status of the Earth Simulator (A Uno)
• Intel Architecture Based High-Performance Computing Technologies (H Cornelius)
• 4D-Var: Optimisation and Performance on the NEC SX-6 (S Oxley)
• Establishment of an Efficient Managing System for NWP Operation in CMA (J-K Hu & W-H Shen)
• The Next-Generation Supercomputer and NWP System of the JMA (M Narita)
• A Uniform Memory Model for Distributed Data Objects on Parallel Architectures (V Balaji & R W Numrich)
• and other papers