Data strategies

An overview of the different data strategies for each DeepMIP group is given on the following pages:

  • DeepMIP-Miocene group data
  • DeepMIP-EOT group data
  • DeepMIP-Eocene group data

The DeepMIP model database

Model data for all DeepMIP groups are organised in a common database structure. The output from each modelling group is initially uploaded to a central data storage at the University of Bristol, where new data is automatically checked for consistency across the existing ensemble. CF-compliant metadata is added to all model fields and the quality-checked data is moved to a long-term storage to be accessible to the wider community following the dissemination strategy of each group.

Uploading data

Please follow these minimum requirements to streamline the upload, quality check and distribution of your data:

  • we strongly encourage you to upload the full monthly mean time series data of the last 100 model years for each simulation (1200 time steps)
  • each variable should be stored in a separate file following the naming convention below
  • as a minimum, please change variable names and units to be consistent with the CMIP6 conventions listed below
  • other metadata do not need to be modified and will be added to all data before wider dissemination
  • once you finished uploading new data, please use this quick form to trigger the further processing of the data

An example of the final directory and file naming structure for the Eocene phase 1 model data is available here.

Getting access (for model data providers)

  1. ask Seb to be added as a ‘collaborator’ to the DeepMIP model database
  2. you will receive an invitation link to register with the University of Bristol – no personal data necessary!
  3. confirm email address and we will approve your application
  4. access the “DeepMIP_Model_output_shared” database either by WebDAV or SFTP

You only need to register once and can use the same account to upload data to different DeepMIP groups.

Naming Convention

Output file names should follow the DeepMIP model naming convention outlined in the reference publication preprint. Each output variable is stored in a separate file according to the following structure:

directory = /<Project>/<Family>/<Model>/<Experiment>/<Version>/<Averaging>/
filename = <Variable>_<Model>_<Experiment>_<Version>.<Statistic>.nc


  • <Project> is currently either:

  • <Family> and <Model> can be chosen by each modelling group (please use hyphens instead of underscores), e.g. “/CESM/CESM1.2-CAM5”
  • <Experiment> options are listed in the individual “Data strategies” linked at the top of the page
  • <Variable> names are listed in the first column in Tables 3 and 4
  • <Statistic> is either:

    • mean: climatological monthly means over last 100 model years (12 timesteps)
    • std: climatological monthly standard deviation over last 100 model years (12 timesteps)
    • time_series: monthly mean data of last 100 model years (1200 timesteps)
    • <Statistic> is omitted for the time-independent boundary conditions
  • the smaller mean and std files are stored in the <Averaging>=climatology directory and are separated from the larger time_series files in the <Averaging>=time_series directory to enable more granular download options

Storing all relevant information in the file name itself allows all phases of coordinated DeepMIP experiments to be integrated into a single database/directory in the future.

To facilitate the generation and analysis of the standardised model output, up-to-date Python dictionaries containing all experiment and variable names are available in this repository .

Variable names

Variable names, units and signs of fluxes follow the naming convention of the Coupled Model Intercomparison Project 6 (CMIP6) data request wherever possible, to adhere to community standards and to allow the integration into existing processing and analysis workflows.

Table 3: Atmosphere output variables following the conventions of the CMIP6 data request.

NameLong NameUnitsDimensions
tasNear-Surface Air TemperatureKtime×lat×lon
tsSurface TemperatureKtime×lat×lon
prPrecipitationkg m-2 s-1time×lat×lon
evspsblEvaporation Including Sublimation and Transpirationkg m-2 s-1time×lat×lon
hflsSurface Upward Latent Heat FluxW m-2time×lat×lon
hfssSurface Upward Sensible Heat FluxW m-2time×lat×lon
psSurface Air PressurePatime×lat×lon
pslSea Level PressurePatime×lat×lon
sncSnow Area Fraction%time×lat×lon
rsdsSurface Downwelling Shortwave RadiationW m-2time×lat×lon
rldsSurface Downwelling Longwave RadiationW m-2time×lat×lon
rsusSurface Upwelling Shortwave RadiationW m-2time×lat×lon
rlusSurface Upwelling Longwave RadiationW m-2time×lat×lon
rsdtTOA Incident Shortwave RadiationW m-2time×lat×lon
rsutTOA Outgoing Shortwave RadiationW m-2time×lat×lon
rlutTOA Outgoing Longwave RadiationW m-2time×lat×lon
rsdscsSurface Downwelling Clear-Sky Shortwave RadiationW m-2time×lat×lon
rldscsSurface Downwelling Clear-Sky Longwave RadiationW m-2time×lat×lon
rsuscsSurface Upwelling Clear-Sky Shortwave RadiationW m-2time×lat×lon
rluscsSurface Upwelling Clear-Sky Longwave RadiationW m-2time×lat×lon
rsutcsTOA Outgoing Clear-Sky Shortwave RadiationW m-2time×lat×lon
rlutcsTOA Outgoing Clear-Sky Longwave RadiationW m-2time×lat×lon
tauuSurface Downward Eastward Wind StressPatime×lat×lon
tauvSurface Downward Northward Wind StressPatime×lat×lon
uasEastward Near-Surface WindW m-2time×lat×lon
vasNorthward Near-Surface WindW m-2time×lat×lon
clhHigh Level Cloud Fraction%time×lat×lon
clmMid Level Cloud Fraction%time×lat×lon
cllLow Level Cloud Fraction%time×lat×lon
cltTotal Cloud Cover Percentage%time×lat×lon
clPercentage Cloud Cover%level×time×lat×lon
husSpecific Humidity1level×time×lat×lon
taAir TemperatureKlevel×time×lat×lon
uaEastward Windm s-1level×time×lat×lon
vaNorthward Windm s-1level×time×lat×lon
wapOmega (=dp/dt)Pa s-1level×time×lat×lon
zgGeopotential Heightmlevel×time×lat×lon
orogSurface Altitudemlat×lon
sftlfPercentage of the Grid Cell Occupied by Land%lat×lon

Table 4: Ocean output variables following the conventions of the CMIP6 data request.

NameLong NameUnitsDimensions
tosSea Surface Temperature°Ctime×lat×lon
siconcSea-Ice Area Percentage (Ocean Grid)%time×lat×lon
mlotstOcean Mixed Layer Thickness Defined by Sigma Tmtime×lat×lon
zosSea Surface Height Above Geoidmtime×lat×lon
hfdsDownward Heat Flux at Sea Water SurfaceW m-2time×lat×lon
wfoWater Flux Into Sea Waterkg m-2 s-1time×lat×lon
tauuoSea Water Surface Downward X StressN m-2time×lat×lon
tauvoSea Water Surface Downward Y StressN m-2time×lat×lon
msftbarotOcean Barotropic Mass Streamfunctionkg s-1time×lat×lon
msftmzOcean Meridional Overturning Mass Streamfunctionkg s-1time×depth×lat
soSea Water Salinity0.001depth×time×lat×lon
thetaoSea Water Potential Temperature°Cdepth×time×lat×lon
uoSea Water X Velocitym s-1depth×time×lat×lon
voSea Water Y Velocitym s-1depth×time×lat×lon
woSea Water Vertical Velocitym s-1depth×time×lat×lon
difvmoOcean Vertical Momentum Diffusivitym-2 s-1depth×time×lat×lon
difvtrboOcean Vertical Tracer Diffusivity Due to Backgroundm-2 s-1depth×time×lat×lon
depthoSea Floor Depth Below Geoidmlat×lon