A Time-split Discontinuous Galerkin Transport Scheme for Global Atmospheric Model | Zendy

Ram D. Nair | Zendy; Lei Bao | Zendy; Michael D. Toy | Zendy

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A Time-split Discontinuous Galerkin Transport Scheme for Global Atmospheric Model

Author(s) -

Ram D. Nair,

Lei Bao,

Michael D. Toy

Publication year - 2015

Publication title -

procedia computer science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.334

H-Index - 76

ISSN - 1877-0509

DOI - 10.1016/j.procs.2015.05.471

Subject(s) - discretization , integrator , advection , scalar (mathematics) , discontinuous galerkin method , mathematics , galerkin method , scheme (mathematics) , computer science , benchmark (surveying) , terrain , atmospheric model , convergence (economics) , mathematical optimization , mathematical analysis , geometry , finite element method , meteorology , physics , geodesy , geology , computer network , ecology , bandwidth (computing) , biology , economic growth , economics , thermodynamics

A time-split transport scheme has been developed for the high-order multiscale atmospheric model (HOMAM). The spacial discretization of HOMAM is based on the discontinuous Galerkin method, combining the 2D horizontal elements on the cubed-sphere surface and 1D vertical elements in a terrain-following height-based coordinate. The accuracy of the time-splitting scheme is tested with a set of new benchmark 3D advection problems. The split time-integrators are based on the Strang-type operator-split method. The convergence of standard error norms shows a second-order accuracy with the smooth scalar field, irrespective of a particular time- integrator. The results with the split scheme is comparable with that of the established models

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