We highly recommend to read the user's guide of CMIP projects available at: https://pcmdi.llnl.gov/mips/
CMIP archives are available through the ESPRI platform including CICLAD and ClimServ machines. You can create an account on ESPRI mesocentre to transparently log to CICLAD or ClimServ at https://meso-account.ipsl.fr/.
The IPSL-CM model produces CMIP-compliant files. The CMIP convention include the CF convention with additional rules from the WIP panel (ex. a CMIP file must describe only one variable). Once the IPSL-CM data are quality checked, the CMIP-compliant files are migrated to a dedicated filesystem at TGCC following the CMIP directory structure. This part of the TGCC filesystem is read-only mounted on the ESPRI mesocentre. On CICLAD and ClimServ, the CMIP data archives are then available under :
/bdd/CMIP6
/bdd/CMIP5
The CMIP data from the other GCMs are downloaded at the IDRIS and IPSL. They are organized in the same CMIP directory structure and transparently available in the same /bdd root.
Example: /bdd/CMIP5/output/IPSL provides access to the whole IPSL-CM data production for CMIP5 exercice. /bdd/CMIP5/output/BCC provides access to BCC data requested by the IPSL community.
We adopted an "on-demand" process to add CMIP data from other GCM. Please send your request at glipsl@ipsl.fr with the following template:
cat < EOF > my_template.txt project=CMIP5 experiments=historical amip models=IPSL-CM5A-LR CNRM-CM5 ensembles=all variables[atmos][3hr]=cltc tas variables[land][fx]=sftgif variables[seaIce][mon]=sic evap EOF
A "dataset" (as defined by ESGF) is one version of a data set resulting from a single simulation (i.e., characterized by a unique option of each CMIP facet before the version such as the institute, the model, the domain, the experiment, the frequency, the ensemble, etc.).
Examples: CMIP5 dataset: CMIP5/output1/IPSL/IPSL-CM5A-LR/ 1pctCO2/mon/atmos/Amon/r1i1p1/v20110427
A dataset is the finest granularity for ESGF publication.
The IPSL ESGF node includes a THREDDS data serveur which replaces the deprecated DODS serveur. This service automatically provides free access to parts of filesystems or remotly-mounted filesystems. From TGCC, the shared space /ccc/work/cont003/thredds/$LOGIN is expose at https://vesg.ipsl.upmc.fr/thredds/catalog/work/catalog.html.
Be careful that the THREDDS spaces at TGCC should only includes hard-links of data from your project spaces on WORK. The THREDDS folders were not designed to host deep copies of your files because of high constraints on storage and inodes.