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The parallel adaptive model PLASMA has been developed for modeling a barotropic atmosphere. This model adapts the computational grid at every time step according to a physical error indicator. Thus, compared to uniform grid experiments the number of grid points is reduced significantly. At the same time, the error increases only slightly, when comparing(More)
Keywords: Finite elements Finite volumes Shallow water equations Triangular grid Spherical geometry Surface a b s t r a c t A global model of the atmosphere is presented governed by the shallow water equations and discretized by a Runge–Kutta discontinuous Galerkin method on an unstructured triangular grid. The shallow water equations on the sphere, a(More)
Stratospheric ozone is an important factor impacting on climate dynamics and thus on atmospheric variability. Aiming to develop a better general understanding of chemistry-dynamics feedbacks, we applied a coupled atmosphere-ocean-sea ice general circulation model (AOGCM) with interactive chemistry, extending up to 80 km. With this model, ECHO-GiSP, two(More)
A global barotropic model of the atmosphere is presented governed by the shallow water equations and discretized by a Runge-Kutta discontinuous Galerkin method on an unstructured triangular grid. The shallow water equations on the sphere, a two-dimensional surface in R 3 , are locally represented in terms of spherical triangular coordinates, the appropriate(More)
An adaptive parallel spherical shallow-water model is introduced that uses the Lagrange-Galerkin method (semi-Lagrangian method + finite element method (FEM)). The scalar formulation of the shallow-water equations, its discretisation and numerical realization are described using suitable techniques for spatial adaptivity, e.g., a stable discretization(More)
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