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The CMIP6 data archive is distributed through the Earth System Grid Federation (ESGF) though many national centres have either a full or partial copy of the data. A quality-controlled subset of CMIP6 data are made available through the Climate Data Store (CDS) for the users of the Copernicus Climate Change Service (C3S).
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For pressure level data the model output is available on the pressure levels according to the table below. Note that since the model output is standardised all models produce the data on the same pressure levels.
Frequency | Number of Levels | Pressure Levels (hPa) |
Daily | 8 | 1000., 850., 700., 500., 250., 100., 50., 10. |
Monthly | 19 | 1000., 925., 850., 700., 600., 500., 400., 300., 250., 200., 150., 100., 70., 50., 30., 20., 10., 5., 1. |
Ensembles
Each modelling centre typically run the same experiment using the same model with slightly different settings several times to confirm the robustness of results and inform sensitivity studies through the generation of statistical information. A model and its collection of runs is referred to as an ensemble. Within these ensembles, four different categories of sensitivity studies are done, and the resulting individual model runs are labelled by four integers indexing the experiments in each category
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| title | Known Errata entries or ESGF withdrawls which affect CDS data |
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Model | Errata link (if available) | Summary | AWI-ESM-1-1-LR |
| For the historical experiment, the daily psl data has been removed from ESGF but is still available on the CDS. | CESM2, CESM2-WACCM | https://errata.ipsl.fr/static/view.html?uid=3626030c-fd21-8e59-8bea-87c2c5a9f47c | Due to a model configuration error, monthly tasmin and tasmax were erroneously calculated as averages instead of minima and maxima. | EC-Earth3 |
| The following data is no longer available from ESGF but are still available on the CDS: - ssp434 - all variables
- sssp534-over - all variables
- ssp245 - deptho
- ssp585 - deptho
- hist - deptho
| | EC-Earth3-Veg |
| The following data are no longer on ESGF but are still available on the CDS: - hist - deptho
- ssp119 - sos
| NORCPM1 | https://errata.ipsl.fr/static/view.html?uid=ad9e4213-f254-e930-a143-030a4b0f8a32 | The historical experiment was mistakenly used to store output from both historical and historical-ext experiment. They aggregated the cmor-ized historical output into the time chunks 1850-2014, 2015-2018 and 2019-2029. They advise users to regard the last two as unofficial and to ignore them if not intended as baseline for dcppA-hindcast/dcppA-assim. | NorESM2-MM | https://errata.ipsl.fr/static/view.html?uid=0d833fdb-7ee4-4520-b40c-d7e7a0dda8bc | An extension of the ssp585 scenario was published. The whole MIP ScenarioMIP with Source NorESM2-MM and experiment ssp585 was withdrawn from ESGF and republished. The data on the CDS is not compromised, it just covers a limited time range compared to the new data. |
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Some models on the CDS currently have either missing historical or scenario data for some variables (which is in the process of being resolved).
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| title | Models with inconsistent variants (ripf identifier) |
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Model | Affected scenario and variables | BCC-CSM2-MR | historical - multiple variables | CAMS-CSM1-0 | historical - monthly mrsos | | CNRM-ESM2-1 | ssp534-over - all variables | | GISS-E2-1-G | historical - all variables | | CESM2 | historical - all variables | | UKESM1-0-LL | historical - multiple variables | | MCM-UA-1-0 | historical - all variables |
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Subsetting and downloading data
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