IPSL-CM5

The ICMC (IPSL Climate Modelling Center) continuously develops and improves the climate model and its various components. The IPSL CM5 is the last version of the IPSL model and is a full earth system model. In addition to the physical atmosphere-land-ocean-sea ice model, it also includes a representation of the carbon cycle, the stratospheric chemistry and the tropospheric chemistry with aerosols. 

There are two versions of this model, with two different sets of physical models: the IPSL-CM5A is an extension of IPSL-CM4 whereas the IPSL-CM5B has an atmospheric model with very different physical parametrisations.

ipsl composition cm5

For the different versions of the IPSL-CM5 models that participate to the CMIP5 project, the atmospheric model has two standard resolutions: the low resolution is 1.9°x3.75° (96x96L39) and the mid-resolution is 1.25°x2.5° (143x144L39). For all of them, the resolution of the oceanic model is the same: about 2°, with a meridional increased resolution of 0.5° near the Equator (149x182L31).

 

models for cmip5

 

IPSL climate models references

IPSL-CM5 is based on the following model components:

  • The LMDZ (in french) atmospheric model;

  • the NEMO ocean model, including sea ice and marine biogeochemistry;

  • the ORCHIDEE model of continental surfaces including carbon cycle;

  • the INCA model of chemistry and aerosols;

  • LMDz-REPROBUS (pdf) coupled chemistry-climate model.

 

All documentation is available here.