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

1950-1978 preliminary Yes   Yes   Yes    

Get ERA5 preliminary from the Climate Data Store

ERA5-Land   1981-present    

 

  Yes    

Get ERA5-Land from the Climate Data Store

ERA-Interim 1979-August 2019 Yes   Yes

 

Yes     Explore ERA-Interim
ERA-Interim/Land 1979-2010      

 

Yes     Explore ERA-Interim/Land
CERA-SAT   2008-2016 Yes   Yes Yes Yes Yes   Explore CERA-SAT

CERA-20C

1901-2010 Yes   Yes Yes Yes Yes

 

Explore CERA-20C
ERA-20CM 1900-2010 Yes   Yes

 

Yes     Explore ERA-20CM
ERA-20C 1900-2010 Yes   Yes

 

Yes   Yes Explore ERA-20C
ERA-20CL 1900-2010         Yes     Contact ECMWF
ERA-40 1957-2002 Yes   Yes

 

Yes     Explore ERA-40
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   Get ORA-20C from the Ocean Synthesis/Reanalysis Directory
CAMS RA (EAC4) 2003- June 2020 Yes Yes           Get CAMS RA (EAC4) from the Atmosphere Data Store
CAMS GHG RA (EGG4) 2003-2016 Yes Yes           Get CAMS GHG RA (EGG4) from the Atmosphere Data Store
MACC 2003-2014 Yes Yes           Explore MACC

Atlas and Picture Gallery

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