ERA-40 Global Land Surface Observation Feedback Record Reports

ERA-40 Global Land Surface Observation Feedback Record Reports include 3 hourly surface observation feedback record reports from SYNOP land observations used in the ECMWF 45-year reanalysis (ERA-40) covering the period from September 1957 to August 2002. SYNOP land observations, from multiple data sources, were assimilated into an ECMWF model and produced ERA-40. Select variables include pressure, height, relative humidity, zonal and meridional wind speed components. The metadata generated during the ERA-40 quality control data assimilation process were appended to the input observations. The final combination of input observations and feedback metadata are called feedback record reports.