Public access to this dataset will be closed on June 1st, 2023. For more information and possible alternatives, please consult the dedicated page on Decommissioning of ECMWF Public Datasets service.


ERA-40 is a global reanalysis dataset covering the period from September 1957 to August 2002.

The atmospheric model used for ERA-40 is known as IFS CY23r4. A comprehensive documentation about the ECMWF forecasting system (the code of which has been developed jointly with Météo-France.) can be found on the ECMWF website at https://www.ecmwf.int/en/publications/ifs-documentation

ERA-40 had the following resolution:

The atmospheric model was coupled to an ocean-wave model which resolved 25 wave frequencies and 12 wave directions at the nodes of its 1.5° grid.

The ERA-40 data assimilation and forecast suite produced:

In addition, forecasts have been subsequently run to ten days ahead from 00 and 12 UTC.

ERA-40 generated supported datasets, archived in ECMWF’s Meteorological Archive and Retrieval System (MARS). The data comprises:

References

Kållberg, P.,  A. Simmons, S. Uppala, and M. Fuentes, 2007: ERA-40 Project Report Series, 17. The ERA-40 Archive, 31pp, https://www.ecmwf.int/node/10595


Some ERA-40 references available from the ECMWF website.

Related articles