01 December 2016

Reference Aquaplanet Climate in the Community Atmosphere Model Version 5

Science

Fundamental characteristics of the aquaplanet climate simulated by the Community Atmosphere Model, Version 5.3 (CAM5.3) are presented. The assumptions and simplifications of the configuration are described. A 16 year long, perpetual equinox integration with prescribed SST using the model's standard 1° grid spacing is presented as a reference simulation. 

Impact

Statistical analysis is presented that shows similar aquaplanet configurations can be run for about 2 years to obtain robust climatological structures, including global and zonal means, eddy statistics, and precipitation distributions. Such a simulation can be compared to the reference simulation to discern differences in the climate, including an assessment of confidence in the differences. 

Summary

To aid such comparisons, the reference simulation has been made available via earthsystemgrid.org. Examples are shown comparing the reference simulation with simulations from the CAM5 series that make different microphysical assumptions and use a different dynamical core.

Contact
Brian Medeiros
National Center for Atmospheric Research (NCAR)
Publications
2016.  "Reference Aquaplanet Climate in the Community Atmosphere Model Version 5."  J. Adv. Model. Earth Syst., doi:10.1002/2015MS000593.