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.