This dataset comprise data from the operational models at ECMWF. It is primarily intended as a prolongation of the ERA-40 dataset beyond 2002.

Currently, the ECMWF_OPER dataset cover the following data:

Geographical area	Time period and Frequency	Variables
North Atlantic Ocean 40°N - 80°N, 30°W - 60°E 1°*1° geographical grid	2002 - 2004 Daily means	East/West surface stress (N m**-2 s) Mean sea-level pressure (Pa) North/South surface stress (N m**-2 s) Surface latent heat flux (W m**-2 s) Surface sensible heat flux (W m**-2 s) Surface solar radiation downwards (W m**-2 s) Surface solar radiation (W m**-2 s) Surface thermal radiation (W m**-2 s) 10 metre U wind component (m s**-1) 10 metre V wind component (m s**-1)
Arctic 40°N - 90°N, 180°W - 179.5°E 0.5°*0.5° geographical grid	2002 - 2004 6 hour	10 metre U wind component (m s**-1) 10 metre V wind component (m s**-1) 2 metre temperature (K) Convective precipitation (m) Stratiform precipitation (Large scale precipitation) (m) Mean sea-level pressure (Pa) Specific humidity (kg kg**-1) Surface latent heat flux (W m**-2 s) Surface sensible heat flux (W m**-2 s) Surface solar radiation downwards (W m**-2 s) Surface solar radiation (W m**-2 s) Sea surface temperature (K) Surface thermal radiation (W m**-2 s) Total cloud cover (none)