Browse reanalysis datasets

ECMWF uses its forecast models and data assimilation systems to 'reanalyse' archived observations, creating global data sets describing the recent history of the atmosphere, land surface, and oceans. 

Dataset Time period Atmosphere Atmospheric composition Ocean waves Ocean sub-surface Land surface Sea Ice Observation Feedback Archive Download using MARS web interface
(unless stated otherwise)
ERA5 1979-present
Yes
 
Yes
 
Yes
    Get ERA5 from the Climate Data Store
ERA-Interim 1979-August 2019
Yes
 
Yes
 
Yes
  Expected soon... Download ERA-Interim
ERA-Interim/Land 1979-2010
 
 
 
 
Yes
    Download ERA-Interim/Land
CERA-SAT   2008-2016 Yes   Yes Yes Yes Yes Yes Download CERA-SAT

CERA-20C

1901-2010
Yes
 
Yes
Yes
Yes
Yes
Yes
Download CERA-20C
ERA-20CM 1900-2010
Yes
 
Yes
 
Yes
    Download ERA-20CM
ERA-20C 1900-2010
Yes
 
Yes
 
Yes
 
Yes
Download ERA-20C
ERA-20CL 1900-2010        
Yes
    Expected soon...
ERA-40 1957-2002
Yes
 
Yes
 
Yes
    Download ERA-40
ERA-15 1979-1993
Yes
 
 
 
Yes
 

 

Download ERA-15
ORAS4 1958-2015      
Yes
      Get ORAS4 from the Ocean Synthesis/Reanalysis Directory
ORAP5 1979-2013      
Yes
 
Yes
  Get ORAP5 from the Ocean Synthesis/Reanalysis Directory
ORAS5 1975-present      
Yes
 
Yes
  Get ORAS5 from the Ocean Synthesis/Reanalysis Directory
ORA-20C   1900-2010      
Yes
 
Yes
  Expected soon...
CAMS RA 2003-2016 Yes Yes           Download Guide
MACC 2003-2014
Yes
Yes
          Download MACC

Atlas and Picture Gallery

An atlas of key atmospheric variables was produced for ERA-40 and there is picture gallery for ERA-15