ERA interim global 1° x 1° reanalysis

ERA Interim Reanalysis - 6 hourly (2D + 3D data), 12 hourly (flux and precipitation data), monthly (2D + 3D data)

ERA-Interim is a global atmospheric reanalysis that is available from 1 January 1979 to 31 August 2019. It has been superseded by the ERA5 reanalysis.

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.

ERA Interim reanalysis covers the 1979 to Aug 2019 time period and it is intended to be a replacement for the ERA-40 reanalysis data. It is more extensive than ERA-40 in terms of the increased number of pressure levels and cloud variables are included. The data presented here are 6 hourly, 12 hourly, and monthly selected variables at the surface and pressure levels.

To convert the fluxes from [ J m**-2 ] to [ W m**-2 ] divide by (12*60*60) or 43,200 seconds.


D. P. Dee et al., 2011, The ERA-Interim reanalysis: configuration and performance of the data assimilation system, Q.J.R. Meteorol. Soc., 137: 553-597, DOI: 10.1002/qj.828

6 hourly: sea level pressure [Pa], skin surface temperature [K], 2m temperature [K],
sea surface temperature [K], 10 m U wind [m s**-1], 10 m V wind [m s**-1], surface pressure [Pa], specific humidity [kg/kg], temperature [K], U wind velocity [m s**-1], V wind velocity [m s**-1], geopotential [m**2/s**2], vertical velocity [Pa s**-1]
12 hourly (fluxes): 10 metre wind gust [m s**-1], 10 metre U wind component [m s**-1], 10 metre V wind component [m s**-1], 2 metre dewpoint temperature [K], 2 metre temperature [K], Boundary layer height [m], Evaporation [m of water], Mean sea level pressure [Pa], Snowfall [m of water equivalent], Surface latent heat flux [W m**-2 s], Surface sensible heat flux [W m**-2 s], Surface solar radiation [W m**-2 s], Surface solar radiation downwards [W m**-2 s], Surface thermal radiation [W m**-2 s], Surface thermal radiation downwards [W m**-2 s], Total column water vapour [kg m**-2], TOA incident solar radiation [W m**-2 s], Total precipitation [m], Top solar radiation [W m**-2 s], Top thermal radiation [W m**-2 s], Downward UV radiation at the surface [w m**-2 s]
monthly: surface pressure [pa], mean sea level pressure [pa], 10 metre u wind component [m s**-1], 10 metre v wind component [m s**-1], 2 metre temperature [k], skin temperature [k], sea surface temperature [k], instantaneous eastward turbulent surface stress [n m**-2], instantaneous norward turbulent surface stress [n m**-2], geopotential [m**2 s**-2], temperature [k], specific humidity [kg kg**-1], vertical velocity [pa s**-1], relative humidity [%], u wind component [m s**-1], v wind component [m s**-1]
Zonal Global by 1.0 deg
Meridional Global by 1.0 deg
Verticalsurface, 1000 975 950 925 900 875 850 825 800 775 750 700 650 600 550 500 450 400 350 300 250 225 200 175 150 125 100 70 50 30 20 10 mbar 
Temporal monthly: Jan 1979 to Aug 2019 by month
Jan 1, 1979 to Aug 31, 2019 by 6 hours
daily flux:
Jan 1, 1979 to Aug 31, 2019 by 12 hours
Volume 37GB/year
Acquired September 2010 (Updated Nov 2019. No more updates. See ERA5)
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