Model integration for the 20th-century (Final) (ERA-20CM)

There are two versions of the ERA-20CM atmospheric model integrations.

Each is comprised of a 10-member ensemble using:

• Radiative forcing from CMIP5
• Sea-surface temperature (SST) and sea ice cover from HadISST2

Note that ERA-20CMv0 is an experimental version and public access to this data will be disabled in the future. Existing users of ERA-20CMv0 should migrate to the final version as soon as possible.

The model ​uses a sophisticated data assimilation methodology which includes a model bias correction. The ocean model used is forced by atmospheric daily surface fluxes, relaxed to SST and bias corrected.