Ocean Chlorofluorocarbon and Heat Uptake during the Twentieth Century in the CCSM3

• DOI: 10.1175/jcli3758.1
• Publication Date: 2006-06-07T19:02:07Z
• Authors: Peter R. Gent; Frank O. Bryan; Gokhan Danabasoglu; Keith Lindsay; Daisuke Tsumune; Matthew W. Hecht; Scott C. Doney
• Keywords: Chlorofluorocarbon

Abstract An ensemble of nine simulations for the climate twentieth century has been run using Community Climate System Model version 3 (CCSM3). Three these runs also simulate uptake chlorofluorocarbon-11 (CFC-11) into ocean protocol from Ocean Carbon Intercomparison Project (OCMIP). Comparison with observations taken between 1980 and 2000 shows that global CFC-11 is simulated very well. However, there are regional biases, used to identify where too much deep-water formation occurring in CCSM3. The differences three simulating briefly documented. variability heat content 1870 control shown be only a little smaller than estimates observations. 1957 1996 compared recent observational secular trend. trend considerably larger natural runs. down 300 m varies by factor 2 across ensemble. Some possible reasons this large spread discussed. There less km. On average, CCSM3 twentieth-century take up 25% more estimate Possible explanations model calculated over whole ocean, not just regions many no parameterization indirect effects aerosols