3.2      MPAS on GPUs.

Suresh, Supreeth, NCAR/UCAR, and Raghuraj Kumar, NVIDIA

The Model for Prediction Across Scales - Atmosphere (MPAS-A) is a general circulation (global) model of the Earth's atmosphere that is designed to work down to non-hydrostatic scales where convective (vertical) cloud processes are resolved. To date, MPAS-A has been used primarily for meteorological research applications, although climate applications in the community earth system model are being contemplated.

The  NCAR's Weather and Climate Alliance (WACA) project is focused on developing a performance portable, implementation of MPAS-A for both Central Processing Units (CPUs) and Graphics Processing Units (GPUs) using the OpenACC directive-based parallelization language. The WACA project team consists of NCAR staff, faculty and students at the University of Wyoming, NVIDIA & NVIDIA PGI developers, and has received the collaboration and support of The Weather Company and IBM, Inc., and the Korea Institute for Science and Technology Information (KISTI). This talk presents MPAS-A performance results, the status of current work and future plans for enabling  MPAS-A execution on GPUs.