Sensitivity of transient eddies to climate change in the CCC general circulation model |
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| Authors: | William J. Gutowski Jr. Paul C. Nendick Lee E. Branscome |
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| Affiliation: | 1. Dept. of Geological and Atmospheric Sciences , Iowa State University , Ames, Iowa, 50011, U.S.A.;2. Environmental Dynamics Research, Inc. , Palm Beach Gardens, Florida, U.S.A. |
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| Abstract: | Abstract 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. |
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