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ICDC
CENIntegrated Climate Data Center ICDC

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IPSL-CM6A

IPSL-CM6A-LR is the sixth version of the IPSL-CM model (Boucher et al., 2020). IPSL-CM6A-LR couples the atmospheric model LMDZ6 (Hourdin et al., 2019) to NEMO3.6 (Madec et al., 2017), including LIM3.6 as a sea ice component (Vancoppenolle et al., 2009, Rousset et al., 2015). Horizontal resolution is 144×142 grid points for the atmosphere (157 km) and nominal 1∘ (eORCA1) for both the ocean and sea ice. Sea ice model resolution in the Arctic is about 50 km. The atmospheric model has 79 vertical layers, with a model top at ∼ 80 km, whereas the ocean has 75 vertical levels.

The sea ice component is based upon version 3.6 of the Louvain-la-Neuve Ice Model (LIM3.6). LIM3.6 is a multi-category halo-thermodynamic dynamic sea ice model embedded in the NEMO environment (including the horizontal grid). It is based on the Arctic Ice Dynamics Joint EXperiment (AIDJEX) framework (Coon et al., 1974), combining the ice thickness distribution framework, the conservation of horizontal momentum, an elastic–viscous–plastic rheology, and energy-conserving halo-thermodynamics, combining the Bitz and Lipscomb (1999) multi-layer thermodynamics (two and one vertical levels in ice and snow) and a semi-empirical parameterization of brine drainage (Vancoppenolle et al., 2009). The surface albedo is empirically specified as a function of the ice surface temperature, ice thickness, snow depth and cloudiness. The radiation absorbed by the ice follows Beer's law and does not infiltrate into the snow. Melt ponds are crudely accounted for, by reducing the albedo by 0.06 when ice is melting from the surface. LIM3 does not account for the lateral melting.

Institution: Institut Pierre Simon Laplace (IPSL), Paris, France
Model: Institut Pierre Simon Laplace - Climate Model Version 6 (IPSL-CM6-LR // IPSL-CM6-LR-INCA)
Resolution: atmos: 250 km, land: 250 km, ocean: 100 km, ocnBgchem: 100 km, seaIce: 100 km // aerosol: 250 km, atmos: 250 km, land: 250 km, ocean: 100 km, ocnBgchem: 100 km, seaIce: 100 km
Components:

IPSL-CM6-LR: atmos: LMDZ (NPv6, N96; 144 x 143 longitude/latitude; 79 levels; top level 80000 m), land: ORCHIDEE (v2.0, Water/Carbon/Energy mode), ocean: NEMO-OPA (eORCA1.3, tripolar primarily 1deg; 362 x 332 longitude/latitude; 75 levels; top grid cell 0-2 m), ocnBgchem: NEMO-PISCES, seaIce: NEMO-LIM3

IPSL-CM6-LR-INCA: as IPSL-CM6-LR but additionally: aerosol: INCA v6 AER

Contact: Olivier Boucher, email: olivier.boucher (at) ipsl.fr
References: Boucher, O., et al., Presentation and evaluation of the IPSL-CM6A-LR climate model, J. Adv. Model. Earth Sy., 12, e2019MS002010, 2020, https://doi.org/10.1029/2019MS002010 
Information: https://cera-www.dkrz.de/WDCC/ui/cerasearch/cmip6?input=CMIP6.DCPP.IPSL.IPSL-CM6A-LR ; https://cera-www.dkrz.de/WDCC/ui/cerasearch/cmip6?input=CMIP6.CMIP.IPSL.IPSL-CM6A-LR-INCA