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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 httpat https://www.ecmwf.int/researchen/ifsdocs/CY23r4/index.html.publications/ifs-documentation
ERA-40 had the following resolution:
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- observations;
- analysis and forecast fields from the assimilating atmospheric model at full resolution;
- analysis and forecast fields from the atmospheric model evaluated at standard pressure levels;
- analysis and forecast fields from the atmospheric model evaluated on isentropic and PV = ± 2 surfaces;
- analysis and forecast fields from the coupled ocean-wave model on its regular 1.5° x1.5° latitude/longitude grid;
- monthly means, variances and covariances;
- feedback from the data assimilation for each observation supplied to it;
- selected diagnostic and derived data.
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Data is archived at ECMWF and available for download from ECMWF data services.
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
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Some ERA-40 references available from the ECMWF E-Librarywebsite.
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