1. , , , , , , , , and 2003 ‘Comparison of the ECMWF seasonal forecast Systems 1 and 2, including the relative performance for the 1997/98 El Niño’. Technical Memo. 404, ECMWF, Shinfield Park, Reading, Berkshire RG2 9AX, UK
2. 1989 ‘Changes in the ECMWF analysis-forecasting scheme and the systematic error of the model’. Technical Memo. 161, ECMWF, Shinfield Park, Reading, Berkshire RG2 9AX, UK
3. Forcing singular vectors and other sensitive model structures
4. Impact of horizontal resolution on seasonal integrations