Sensitivity of transient eddies to climate change in the CCC general circulation model

We use eddy life-cycle simulations to evaluate the response of atmospheric transient eddies to a global warming caused by CO2 doubling in the CCC general circulation model. In simulations using Northern Hemisphere winter conditions, transient waves attain larger kinetic energy and encompass a wider range of latitudes in the warmer climate. This behaviour contrasts with a previous investigation that used output from the NCAR and GFDL models. Our analysis indicates two primary factors for the difference between model responses: (1) a smaller change in the mid-latitude temperature gradient in the CCC model, which allows (2) increased atmospheric water vapour in mid-latitudes to catalyze a more rapidly evolving life-cycle.