The National Oceanic and Atmospheric Administration (NOAA) has recently announced the selection of the Finite-Volume on a Cubed-Sphere (FV3) atmosphere dynamical core for its Next Generation Global Prediction System and is now engaged in defining the physics suites to be used in upcoming operational implementations of the FV3-based Global Forecast System (FV3GFS). In this investigation, we initiate the evaluation of the impact of physical parameterization choices on tropical cyclone simulations. The first physics parameterization to be tested and evaluated in the FV3GFS will be the Grell-Freitas (GF) convective parameterization. The impact of the GF physics, and its interaction with other members of the FV3GFS physics suite, will be addressed relative to observations. The analysis of tropical cyclone forecasts in FV3GFS will provide insight and understanding of the mesoscale and synoptic systems that directly impact track and intensity forecasts, therefore advancing the knowledge of mechanisms associated with forecast model errors.
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