Data Description

The E3SM data is freely available through the Earth System Grid Federation (ESGF) distributed archives, which also is an official archive to hold CMIP6 (Coupled Model Intercomparison Phase 6) data. E3SM is participating in some of the CMIP6 experiments, namely:  CMIP Diagnostic, Evaluation and Characterization of Klima (DECK) experiments as well as CMIP6 historical simulations and future scenarios ssp585.


All E3SM data is released to the public by publishing to ESGF archives. By default, all the data is published in E3SM project on ESGF in the E3SM output format both on the native grid and some data regridded to standard Cartesian grid. Additionally, if a simulation follows the CMIP6 protocol, than that data is re-formatted and also published to the ESGF in CMIP6 project space. This data is regridded to the CMIP6 requested grid and it is CMOR-ized (formatted with Climate Model Output Rewriter, CMIP6 endorsed software ) to meet the stringent CMIP6 data format and metadata requirements.

E3SM output format data on ESGF in E3SM project’s space:

  • Atmosphere Model Data
    • Native: h0 (monthly), h1 (daily), h2 (6-hourly snap), h3 (6-hr), h4 (3-hr), h5 (daily cosp)
    • Regridded  h0
    • Regridded monthly and seasonal climotologies
    • Regridded time series (of select variables)
  • Land Model Data
    • Native clm2.h0
    • Regridded clm2.h0
  • Ocean Model Data (MPAS-O)
    • Native
  • Sea-Ice Model Data (MPAS-SI)
    • Native

ESGF Data Search Options

 Search Data on ESGF – LLNL ESGF node (older interface image to the right)

Use search options in ESGF to zoom in on the data you are looking for. The image on the right shows what search criteria are possible. You can also use a more detail search and look for a string in the file name for example.

Search Experiment options to look for a specific simulations:

  • piControl – for the lower res CMIP6 DECK simulation
  • 1950-control  – for the high resolution HiResMIP-like simulation
  • etc.

You can also search data by simulations belonging to the Science Driver:

  • Water Cycle
  • BGC
  • Cryosphere
 Data components can be selected by choosing the Realm, ie data belonging to one of the 5 main categories aligned with model component:
  • atmos – for atmosphere component related data
  • land – for the land and mosart components related data
  • ocean – for ocean component related data
  • river – for river component related data
  • sea-ice – for the sea ice component related data

Several E3SM model versions can be chosen:

  • E3SM v1.0  – shown in options as “1 0”   (watercycle v1 data)
  • E3SM v1.1  –  shown as “1 1”    (bgc CTC v1 data)
  • E3SM v1.1_ECA –  shown as “1 1 ECA”  (bgc ECA experimental v1)
  • E3SM v1.2  –  shown as “1 2”  (cryosphere v1 )
  • etc.

The Regridding search options enable to choose data on native grid or regridded

  • native  – this is the grid that a component is using in the simulation, it is different for different components
  • 180×360 – data regridded to 180×360 lon-lat uniform grid
  • etc.

The Time Frequency lets one select data from several different time frequencies:

  • 3hr – three hourly
  • 6hr – sic hourly
  • day – daily
  • mon – monthly
  • monClim – monthly climatologies
  • etc.

The Data Type options enables selection of several types of files:

  • climo  – for climatologies
  • model-output  – for raw model output
  • time-series  – time-series of a particular variable for all simulated times
  • mapping – mapping ocean file used in simulation
  • etc.

The Period enables selection of the simulated years, as in:

  • Perpetual 1850 – for the lower res CMIP6 DECK simulation
  • Perpetual 1950 – for the high resolution HiResMIP-like simulation
  • 1850-2014  — simulated years range
  • etc.

The atmosphere and land components grids for those simulations are:

  • 0 25deg – for the high resolution HiResMIP-like simulation
  • 1deg – for the lower res CMIP6 DECK simulation

The ocean and sea ice components grids are variable:

  • 18-6km – for the high resolution HiResMIP-like simulation
  • 60-30km – for the lower res CMIP6 DECK simulation

Example of Published Data Statistics

The 1950-Control run with 1 year of data amounts to:

  • Published
    • 1.3T of data
    • 135 files
  • Each month of data:
    • atmosphere data is 15G
    • land data is 1.2G
    • ocean data is 76G
    • sea-ice data is 2.1G

The piControl run with 500 years of data size:

  • Published
    • 34T of data
    • 43742 files
  • Each month of data:
    • atmosphere data is 1.022G
    • land data is 0.88G
    • ocean data is 3.7G
    • sea-ice data is 0.138G
    • Each 500yr time-series is 0.757G
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