QTCM (Quasi-equilibrium Tropical Circulation model)

Posted March 20, 2002,20:22
Institution: Dept. of Atmospheric Sciences at UCLA
Contact: neelin@atmos.ucla.edu

Quasi-equilibrium Tropical Circulation Models (QTCMs) are part of the research effort of the Climate Systems Interaction (CSI) group, in the Dept. of Atmospheric Sciences at UCLA. QTCMs are models of intermediate complexity suitable for the modeling of tropical climate and its variability. It occupies a niche among climate models between complex general circulation models and simple models. QTCM1 (version 2.2): Anomalous precipitation from a simulation forced by observed sea surface temperatures 1982-1998. Larger image with animation control. The primitive-equation-based dynamical framework is constructed using analytical solutions from the quasi-equilibrium convective parameterization as the first basis function in a Galerkin representation of vertical structure. A uniqueness of the QTCM is its balanced treatment of dynamics and physical parameterizations. It includes a linearized longwave radiation scheme, simple cloud prediction and shortwave radiation schemes, and the Simple-Land (SLand) land model.

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