ERA-CLIM and ERA-CLIM2 are two successive international research project in the area of climate reanalysis. Details: ERA-CLIM and ERA-CLIM2.
One of the outputs of these projects is the ERA Interim dataset, a global atmospheric reanalysis from 1979, Interim is the name of a global atmospheric reanalysis project at ECMWF, processing data from 1979 to date. ERA Interim is one of several ERA projects with similar scope carried out at ECMWF.The ERA Interim project produces a single dataset, referred to as ERA Interim dataset. The ERA Interim dataset is continuously updated in near real time as new data becomes available.
Product description
- The ERA Interim dataset contains atmospheric and surface parameters:
- 6-hourly atmospheric fields on model levels, pressure levels, potential temperature and potential vorticity
- 3-hourly surface fields and daily vertical integrals
- Monthly averages of daily means
Synoptic monthly averages at 0 UTC, 6 UTC, 12 UTC, 18 UTC
- The temporal coverage is from 1 January 1979 to present
- The spatial coverage is global
- The spectral resolution is T255 (~80 km spatial resolution) on 60 vertical levels from the surface up to 0.1 hPa.
The data assimilation system used to produce ERA-Interim is based on a 2006 release of the IFS (Cy31r2). The system includes a 4-dimensional variational analysis (4D-Var) with a 12-hour analysis window.
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