ERA5

A first 7-year segment of the ERA5 dataset is now available for public use. ERA5 provides hourly estimates of a large number of atmospheric, land and oceanic climate variables. The data cover the Earth on a 30km grid and resolve the atmosphere using 137 levels from the surface up to a height of 80km. ERA5 includes information about uncertainties for all variables at reduced spatial and temporal resolutions.

The extension of the dataset into 2017 will be published later this year, followed by continuous updates forward in time. Preliminary daily updates of the dataset will be made available to users within 7 days of real time. Final quality-assured monthly updates of ERA5 will then be published within 3 months of real time.

Subsequent releases of ERA5 will cover the earlier decades. The entire ERA5 dataset from 1950 to present is expected to be available for use by early 2019.

ERA5 combines vast amounts of historical observations into global estimates using advanced modelling and data assimilation systems. Access to all observations used in ERA5 will be provided at a later stage.

ERA5 will eventually replace the ERA-Interim reanalysis. Key characteristics of ERA5 and important changes relative to ERA-Interim can be found here.

All ERA5 data are stored in ECMWF’s main repository of meteorological data, MARS (Meteorological Archival and Retrieval System). Currently, public access to the data is only possible via the ECMWF WebAPI. From 2018 onwards, ERA5 will be made available via the Copernicus Climate Change Service (C3S) Climate Data Store (CDS).