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ERA-5 Reanalysis - High resolution atmospheric data for Earth System Modelling and evaluation

A meteorological reanalysis is a meteorological data assimilation project which aims to assimilate historical observational data spanning an extended period. These reanalysis data sets are widely used in Earth System Sciences for driving model simulations and for evaluation of earth system models and experimental data. ERA-5 comprises the most elaborated reanalysis in terms of spatial and temporal resolution as well as the data assimilation process. ERA-5 is being produced using 4DVar data assimilation in CY41R2 of ECMWF’s Integrated Forecast System (IFS), with 137 model levels in the vertical, with the top level at 80 km. The horizontal resolution is 31 km. It will cover the period January 1950 to near real time. ERA-5 data released so far covers the period 2008 - present.