Dynamical Core Evaluation Test Report for NOAA’s Next Generation Global Prediction System (NGGPS)
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Dynamical Core Evaluation Test Report for NOAA’s Next Generation Global Prediction System (NGGPS)

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    In order to improve global forecasts for its numerical guidance products, the National Oceanic and Atmospheric Administration (NOAA) evaluated candidate non-hydrostatic dynamical cores (dycores) with a battery of tests to culminate in the selection of a new dycore for the Next Generation Global Prediction System (NGGPS). The evaluation considered applications ranging from weather and climate prediction, anticipation of simulating moist convection on the global scale, and efficient usability of present and future high performance computers. The current NOAA operational global forecast model is spectral and hydrostatic; therefore, it cannot explicitly simulate moist convection and will not be able to scale up to take advantage of peta- and exa-scale high performance computing (HPC) systems. The first round of tests (Phase 1) for solution accuracy and computational performance resulted in the selection of two dycores (out of five tested cores) to proceed to the final round of testing (Phase 2). This is a high level summary of the results of the Phase 2 tests – more details are included in the main body of the report.
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