Climate Variability & Change
Working Group CVCWG

CAM6 Prescribed SST AMIP Ensembles

The CVCWG has conducted a number of experiments using prescribed SST and ice forcing within CAM6 using the CESM2. Details on these ensembles and instructions for how to access the data can be found below.

We kindly ask that you acknowledge the CVCWG when presenting results based on the CAM6 Prescribed SST AMIP Ensembles in either oral and written form.

Project Details

  • Simulation Names:
    • Tropical AMIP 10-member ensemble:
      f.e21.FHIST.f09_f09.historical.ersstv5.toga.ensXX, XX = 01-10
    • Global AMIP 10-member ensemble:
      f.e21.FHIST_BGC.f09_f09.historical.ersstv5.goga.ensXX, XX = 01-10
  • Model Version: CESM2.1.1 (Tropical AMIP) / CESM2.1.2 (Global AMIP)   Codebase | Documentation
  • Resolution: 0.9x1.25 (CESM nominal 1o grid)
  • Years: 1880-2014
  • Ensemble Size: 10 members
  • Time Frequencies Saved: Monthly, Daily
  • Machine: NCAR:Cheyenne
  • Compsets: FHIST (Tropical AMIP), FHIST_BGC (Global_AMIP)
  • Additional Notes: For the Tropical AMIP Ensemble: SST's from 28S:28N are set to time-varying SST's from ERSSTv5. A transition/linear interpolation zone exists from 28:35 degree latitudes. From 35 degrees polewards full-period climatological SSTs (ERSSTv5)/sea-ice (HadISST1) are set.

    For the Global AMIP Ensemble: Global SST's (ERSSTv5) and sea-ice (HadISST1) are specified.

    All simulations from both ensembles were initialized from the 11th CESM2 historical member on January 1st, 1880, with each ensemble member receiving a small change in the initial air temperature via namelist setting PERTLIM. All CMIP6 time-varying external, natural and anthropogenic forcings were specified in these ensembles.

Data Acquisition

Both ensembles are available from NCAR/CISL's campaign store or on the NCAR machine casper at:

  • /glade/campaign/cesm/development/cvwg/CESM2.1_TOGA_ERSSTv5
  • /glade/campaign/cesm/development/cvwg/CESM2.1_GOGA_ERSSTv5
If you do not have access to the CISL campaign store or NCAR's casper machine you can contact the CVCWG liaisons for assistance.