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ICDC
CENIntegrated Climate Data Center ICDC

Photo: getty images/L. Calvetti

CESM2

The CESM2 models are built from the CESM2.1 configuration described in Danabasoglu et al. (2020). The CESM2-CAM configuration uses the CAM6 atmosphere model and the CLM5 land surface model at nominal 0.9×1.25∘ resolution, coupled to the POP 2.0.1 ocean and the Los Alamos sea ice model (CICE) at nominal 1∘ (gx1) resolution. The CESM2-WACCM configuration uses the WACCM6 high-top atmospheric component in place of CAM6.

The sea ice model component is based upon version 5.1.2 of the CICE sea ice model of Hunke et al. (2015). The CICE model uses a prognostic ice thickness distribution (ITD) with five thickness categories. The standard CICE elastic–viscous–plastic (EVP) rheology is used for ice dynamics. The model uses mushy-layer thermodynamics and prognostic sea ice salinity (Turner et al., 2013) configured with eight layers of ice and three of snow.

Radiation is calculated using the delta-Eddington scheme of Briegleb and Light (2007), with melt ponds modelled on level, undeformed ice, as in Hunke et al. (2013).

Institution: National Center for Atmospheric Research (NCAR), Climate and Global Dynamics Laboratory, Boulder, USA
Model: Community Earth System Model version 2 (CESM2 or CESM2-FV2)
Resolution: aerosol: 100 km, atmos: 100 km, atmosChem: 100 km, land: 100 km, landIce: 5 km, ocean: 100 km, ocnBgchem: 100 km, seaIce: 100 km
Components: aerosol: MAM4 (same grid as atmos), atmos: CAM6 (0.9x1.25 finite volume grid; 288 x 192 longitude/latitude; 32 levels; top level 2.25 mb) or WACCM6 (0.9x1.25 finite volume grid; 288 x 192 longitude/latitude; 70 levels; top level 4.5e-06 mb), atmosChem: MAM4 (same grid as atmos), land: CLM5 (same grid as atmos), landIce: CISM2.1, ocean: POP2 (320x384 longitude/latitude; 60 levels; top grid cell 0-10 m), ocnBgchem: MARBL (same grid as ocean), seaIce: CICE5.1 (same grid as ocean)
Contact: Gary Strand, email: strandwg (at) ucar.edu
References: Danabasoglu, G., et al., The Community Earth System Model version 2 (CESM2), J. Adv. Model. Earth Sy., 12, e2019MS001916., 2020, https://doi.org/10.1029/2019MS001916
Information: https://cera-www.dkrz.de/WDCC/ui/cerasearch/cmip6?input=CMIP6.CMIP.NCAR.CESM2 or https://cera-www.dkrz.de/WDCC/ui/cerasearch/cmip6?input=CMIP6.GeoMIP.NCAR.CESM2-WACCM