CESM2 Scientifically Validated Configurations

Scientific validation of CESM consists of a multi-decadal model run of the given component set at the target resolution, followed by scientific review of the model output diagnostics. All scientifically supported component sets are also accompanied by diagnostic and model output data.

You should use the most recent version of the model that is available unless you are trying to replicate previous results or create a branch run from a previous experiment.

Component sets and resolutions are backward compatible with all CESM releases. However, newer releases of CESM allow for additional compsets, resolutions and machines.

The DiscussCESM Forums bulletin board can also provide specific recommendations from the CESM community regarding which release of the model to use for your specific requirements.

NOTE: CESM2.0 has the same code base that will be used in CESM contributions to the Coupled Model Intercomparison Project phase 6 (CMIP6). However, it does not include the CMIP6-related forcings and associated component sets. These will be made available in the CESM2.1 release, scheduled for this fall.


Compset Resolution Simulation Type CASE name Diagnostics CESM Version Data Notes
B1850 0.9x1.25_gx1v7 Control Simulations b.e20.B1850.f09_g17.pi_control.all.297 Plots CESM 2.0.0

The dataset is 22 Tbytes total and contains raw model history stream NetCDF output files. The model data sets for this experiment are available via anonymous gridftp at endpoint

gridanon.cgd.ucar.edu/ftp/cesm2.0.0/b.e20.B1850.f09_g17.pi_control.all.297
or directly from NCAR for users with glade access at:
/glade/p/cesm0005/archive/b.e20.B1850.f09_g17.pi_control.all.297

Compset B1850 is for a fully-coupled simulation for pre-industrial conditions with forcing representative of the climate in 1850. The release includes model output for a 300-year pre-industrial control simulation (run #297). The default initial conditions for this compset are from this control simulation at year 130.

BHIST 0.9x1.25_gx1v7 Control Simulations b.e20.BHIST.f09_g17.20thC.297_01 Plots CESM 2.0.0

The dataset is 10 Tbytes total and contains raw model history stream NetCDF output files. The model data sets for this experiment are available via anonymous gridftp at endpoint

gridanon.cgd.ucar.edu/ftp/cesm2.0.0/b.e20.BHIST.f09_g17.20thC.297_01
or directly from NCAR for users with glade access at:
/glade/p/cesm0005/archive/b.e20.BHIST.f09_g17.20thC.297_01

Compset BHIST is for performing a fully-coupled simulation of the historical period from 1850-2005. The release includes model output from one such simulation. The default initial conditions for the compset also come from year 130 of run #297, a pre-industrial control simulation.

BHIST 0.9x1.25_gx1v7 Control Simulations b.e20.BHIST.f09_g17.20thC.297_05 Plots CESM 2.0.0

The dataset is 8.9 Tbytes total and contains raw model history stream NetCDF output files. The model data sets for this experiment are available via anonymous gridftp at endpoint

gridanon.cgd.ucar.edu/ftp/cesm2.0.0/b.e20.BHIST.f09_g17.20thC.297_05
or directly from NCAR for users with glade access at:
/glade/p/cesm0005/archive/b.e20.BHIST.f09_g17.20thC.297_05

Compset BHIST is for performing a fully-coupled simulation of the historical period from 1850-2005. The release includes model output from one such simulation. The default initial conditions for the compset also come from year 130 of run #297, a pre-industrial control simulation.

Compset Resolution Simulation Type CASE name Diagnostics CESM Version Data Notes