An Adaptive Non-Conforming Spectral Element Atmospheric Model
نویسندگان
چکیده
An interpolation based non-conforming spectral element atmospheric model is described. The error norms for a standard test problem are compared against uniform resolution results. Preliminary results for an adaptive mesh refinement strategy are reported. To avoid local time-stepping, a nonlinear variant of operator integration factor splitting has been implemented. A backward differentiation formula is applied to Coriolis and gravity wave terms. Runge-Kutta integration is used for sub-stepping and the implicit system is solved by Krylov iteration. For a fixed time step size, h and p refinement studies demonstrate that the nonlinear OIFS scheme allows an additional level of space refinement compared to a Crank-Nicholson/Leapfrog scheme.
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