Ocean sub-surface, Sea ice

An eddy-permitting ocean reanalysis spanning the period 1979–2012. Includes increased horizontal and vertical resolution, an prognostic sea-ice component, new versions of the ocean and data assimilation system, revised surface fluxes, new version and treatment of satellite sea surface height data, and assimilation of sea-ice concentration, among others.

ORA-20C is a 10-member ensemble of ocean reanalyses covering the 20th century using atmospheric forcing from ERA-20C. Its main purpose is to provide initial conditions for the ocean component of the CERA-20C streams.