New ECMWF Seasonal Forecast (hindcast) Ensemble dataset ======================================================= In support of the COAPEC Thematic Programme the BADC has extracted ECMWF Seasonal Forecast ensemble data. These data are also known as "Hindcasts" as they are forecasts run retrospectively. The dataset includes monthly means, maxima, minima and standard deviations for the available surface variables for the period 1987-2001 (with 2002 onwards currently being extracted). Atmospheric variables are only currently available as monthly means. There are 33 parameters held on surface or single levels including winds, temperatures, heat fluxes, radiation, precipitation and soil moisture. Geopotential, Temperature, Specific Humidity, Relative Vorticity and Divergence are available on pressure levels. The data is held on a regular 1.875 x 1.875 degree grid in GRIB format. For each month there are six forecast months archived, with 5 ensemble members for 10 months of the year, and 40 ensemble members in May and November of each year. The data is now available to BADC users as part of the main ECMWF Operational archive with documentation located at: http://badc.nerc.ac.uk/data/ecmwf-op/seasonal_fcs.html Further documentation on the seasonal forecasts is available at the following ECMWF links: http://www.ecmwf.int/products/forecasts/seasonal/documentation http://www.ecmwf.int/publications/newsletters/pdf/98.pdf BADC Support. 12th March 2004.