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AbstractClimate variations in four millennium integrations obtained with coupled GCMs are studied from a spectral point of view. It is shown that the bulk of these variations can be described by two distinctly different types of spectra. The type-I spectra, characterized by a high-frequency 2 slope (with being frequency) and a low-frequency plateau, indicate the dominance of short-term fluctuations...
AbstractA simplified global circulation model is used to analyse a greenhouse warming experiment simulated by a comprehensive general circulation model. The given GCM scenario and control climates are assimilated by the simplified model using a dynamical relaxation technique. Two sets of sensitivity experiments investigate the influence of upper and lower tropospheric changes in baroclinicity on the...
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