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 Home > Products > Data Services > Archive > ERA-15 > 
   

ERA-15 Data Archive





 

 
The ERA-15 production system generated re-analyses from December 1978 to February 1994.

The ERA-15 Archive contains global analyses and short range forecasts of all relevant weather parameters, beginning with 1979, the year of the First GARP Global Experiment (FGGE)

The Level III-B archive is subdivided into four classes of data sets:

The data sets are based on quantities analysed or computed within the ERA-15 data assimilation scheme or from forecasts based on these analyses.

The Basic Data Sets contain values in a compact form at a resolution of 2.5° x 2.5°. They are particularly suitable for users with limited data processing resources

The Full Resolution Data Sets provide access to most of the data from the ERA-15 atmospheric model archived at ECMWF. These archives have a higher space resolution. They should only be used where high resolution is essential; in this respect they are particularly suited for use in conjunction with case studies and as initial conditions for high resolution models. This archive includes analysis, forecast accumulation and forecast data. Data are available on the surface, pressure levels and model levels.

The Wave archive contains analysis data from the ERA-15 wave model.

The Monthly Means data sets contain data at the resolution of the data assimilation and forecast system used by ERA-15 (T106 for spectral fields and N80 for Gaussian fields). Data services associated with these data sets include the provision of interpolation to requested resolutions and representation forms.

The archive is currently maintained using the WMO FM 92-IX Ext GRIB (grid in binary) form of data representation, with a non-standard version of GRIB Table 2. All fields of data are global within the archive except for Mediterranean wave model data.

Data are stored in FM 92 GRIB using sufficient bits to ensure that the grid point values can be retrieved to an accuracy consistent with the analysis methods used

A full extraction service is supported, enabling users to obtain sub-areas of data and data at various resolutions on regular Gaussian or latitude/longitude grids, or as spherical harmonics with selected triangular truncation. All extracted data are delivered using the GRIB representation.

 

 


 

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