Fig. 1: Spatial resolution (in km) of the FESOM MR grid used in AWI-CM-1-1-MR for the CMIP6 DECK and ScenarioMIP simulations. Resolution is locally increased up to 8 km in regions of high sea surface height (SSH) variability as observed by satellites.

2.3 Cmorization and data publication

CMIP6 is a community project and sharing our experiment result data is an important aspect of the project. To be able to utilize data from other groups, a large set of output data has been defined where the attributes and detailed description for each dataset are put in place as a reference. These are called the CMIP6 CMOR data request (DR) tables (cmip6-cmor-tables 2019). The tables have evolved to a great extent over the past three years. All CMIP6 data are being published through the Earth System Grid Federation (ESGF) (Juckes et al., 2020) - including the AWI-CM CMIP6 data (Semmler et al., 2018).
From a technical point of view, we first chose which variables to generate during our model runs, as re-running the simulations is usually not feasible due to time and resource constraints. We currently produce around 150 variables matching the recent CMIP6 CMOR DR tables. The model has been optimized to be able to output the data in a very resource efficient manner; this enables us to use less computing resources and complete the simulations more quickly. Due to the many changes of the requirements regarding the output contents and metadata information the CMIP6 CMOR DR tables have undergone, we had to develop a flexible strategy to transform the simulation output into the required publishable format.
As a result, we now have a post processing software in place, which can directly be fed with the aforementioned DR tables to produce the output accordingly (Hegewald 2019). More details on the procedure and an explanation of how to use unstructured mesh data from the ESGF can be found in the Appendix section A1.