ECMWF's meteorological archive contains petabytes of operational and research data. The Meteorological Archival and Retrieval System (MARS) provides facilities for the retrieval of those data in GRIB or NetCDF fomat.
Full access to the archive
The whole archive, including special datasets, projects and research experiments, is made accessible only to NMHSs of ECMWF Member and Co-operating States. Access is via each country's computing representative.
- Browse the full MARS Catalogue
Check availability of the data, estimate the download size, and get the MARS request syntax needed to download the data using the Access MARS service of the Web API (for web users) or using ECMWF computing facilities. Also download the data directly in GRIB or NetCDF, though this is not the recommended method.
Licensed access to the archive
- Browse the Catalogue of ECMWF Archive Products (or 'Archive Catalogue')
Preview what is available, check availability of the data, estimate the download size, and get the MARS request syntax needed to download the data using the Access MARS service of the Web API.
- Select and enquire about a licence
Data can only be downloaded once a licence has been obtained.
Public access to the archive
A number of datasets are made available free of charge, including Global Reanalyses (such as ERA-Interim, and ERA5), multi-model (such as TIGGE), and atmospheric composition (such as CAMS near-real-time).