EC-Earth3 in CMIP6

The EC-Earth consortium has participated in 20 CMIP6 MIPS with at least one of the EC-Earth3 model configurations. The eight different EC-Earth3 model configurations are described in the EC-Earth3 reference paper: The EC-Earth3 Earth system model for the Coupled Model Intercomparison Project 6 (Döscher et al., 2022).

An important part of the EC-Earth3 data where published by the EC-Earth consortium in time before the official CMIP6 dateline. For instance the EC-Earth3 r1i1p1f1 & EC-Earth3-Veg r1i1p1f1 CMIP historical & ScenarioMIP SSP simulations are part of the IPCC CMIP6 ATLAS, see for instance the the screenshot at the right.

EC-Earth3 r1 & EC-Earth3-Veg r1 in IPCC6 ATLAS ensemble

The EC-Earth3 model configurations, with their grid specs and their CMIP6 MIP participation, are listed below:

Each model configuration is involved in at least one WCRP CMIP6 endorsed MIP. In the community approach of the EC-Earth consortium, each model configuration and each MIP participation is lead by an institutional member.

CMIP6 simulations are carried out by several consortium members on different HPC environments. This has several advantages, from allowing different groups to work with the same tool in parallel, to leveraging the burden of ensemble climate simulations. Thereby it is critical to ensure that ESMs provide reproducible results under changes in computing environment. While reproducibility in a strong sense (bit-for-bit) is in general infeasible, it must be expected that results obtained under one computing environment are statistically indistinguishable from those obtained under another environment (reproducibility in a weak sense). EC-Earth has developed a protocol to routinely assess the reproducibility in a weak sense for the EC-Earth3 model system. See also Döscher et al. (2022) and Massonnet et al. (2020).

The EC-Earth consortium has established standard tools for configuring (genecec) and postprocessing (ece2cmor3) for all EC-Earth3 configurations and MIP experiment combinations to ensure that model output from all ESM component models is provided consistently according to the CMOR standards provided by the CMIP6 data request (Juckes et al., 2020). Most of the produced CMIP6 data has been published on the ESGF node grid framework, for instance datasets can be searched & downloaded at this NSC ESGF node interface. Also a very fast meta-data and data BUG fixer (cmor-fixer) is provided which also can be safely run at the ESGF nodes itself. Errata and their handling status on CMIP6 data are published via the ES-DOC errata service. Select EC-Earth-Consortium at the Institution ID drop down menu to obtain a list of EC-Earth3 errata and their status. Moreover, the EC-Earth consortium has also set up the ec-earth-errata-tracer platform for EC-Earth3 data users from outside the consortium to report data issues, however this has not be used much sofar. The EC-Earth consortium has also documented the model specs for the eight EC-Earth3 model configurations in the ES-DOC archive, see for instance the EC-Earth3 ES-DOC documentation. The EC-Earth consortium has followed the CMIP6 citation service with the result that the CMIP6 EC-Earth3 datasets that have been published on the ESGF nodes are accompanied by an CMIP6 citation, for instance see the citation of ScenariMIP SSP5-8.5 of EC-Earth3.

The EC-Earth consortium has participated with EC-Earth3 in CovidMIP (Jones et al., 2021).

The EC-Earth consortium has taken substantial computing, data transferring and financial effort to provide the large model level data volume request for CORDEX, these 600 TB of data are / will be published on the NSC ESGF node. A convenient way to obtain the latest overview of the published EC-Earth3 & EC-Earth3-Veg CORDEX model level data on the NSC ESGF node, is to go to the NSC ESGF node site and navigate to the left-bottom and select the esg-dn3.nsc.liu.se node under the Data Node drop-down menu (and continue by clicking the search).