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:
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.