SC21 Proceedings

The International Conference for High Performance Computing, Networking, Storage, and Analysis

Multiple Same Level and Telescoping Nesting in GFDL’s FV3

Authors: Joseph Mouallem (Princeton University, Geophysical Fluid Dynamics Laboratory (NOAA)) and Rusty Benson and Lucas Harris (Geophysical Fluid Dynamics Laboratory (NOAA))

Abstract: The current two-way, single nest capability in the FV3 dynamical core, used in weather and climate applications by a diverse group of institutions and organizations, is upgraded with the capability to employ multiple same-level nests as well as telescope, or embed, the various nests within each other. In particular, this capability has been much anticipated by the Unified Forecast System (UFS), from which the National Weather Service (NWS) draws to build the operational Global Forecast System (GFS). Grid nesting adds a refined grid over an area of interest to better resolve small-scale flow features necessary to accurately predict special weather events such as severe storms and hurricanes. The latest developments in the dynamical core, FV3, developed at GFDL allow concurrent execution of multiple same-level and telescoping nested grids. An overview of the nesting technique and code performance within the GFDL's atmosphere model SHiELD is presented.

Best Poster Finalist (BP): no

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