CCSM4: Notable Improvements
- New treatments of cloud and ice-phase processes;
- Improved representation of the interactions among water vapor, solar radiation, and terrestrial thermal radiation;
- New treatment of the effects of aerosols, including prognostic sulfate, on the reflection and absorption of solar radiation; and
- New dynamical frameworks suitable for modeling atmospheric chemistry.
- Improved performance and scalability on parallel supercomputers;
- Faster multi-way communication among the component models; and
- New communications infrastructure.
- New methods to enable simulation of the terrestrial carbon cycle;
- New methods to enable simulation of dynamic vegetation; and
- Improvements in land-surface physics to reduce temperature biases; and
- New load balancing implementation results in substantial performance improvement.
- Improvements to the representation of the ocean mixed layer;
- Inclusion of solar heating by chlorophyll; and
- New infrastructure for studying vertical mixing in the ocean.
- New advanced sea ice rheology;
- Explicit ice-thickness distribution physics;
- Explicit treatment of brine pockets; and
- Improved scheme for horizontal advection of sea ice.
- New portability for vector and Linux supercomputers;
- New, easy-to-use methods to run IPCC climate-change experiments;
- Flexibility to simulate climate over a wide range of spatial resolutions with greater fidelity; and
- New built-in test facilities suitable for validating installation and verifying some types of model changes.