The Simple Cloud-Resolving E3SM Atmosphere Model Running on the Frontier Exascale System

Luca Bertagna
Sandia National Laboratory

Abstract: We present an efficient and performance portable implementation of the Simple Cloud Resolving E3SM Atmosphere Model (SCREAM). SCREAM is a full featured atmospheric global circulation model with a nonhydrostatic dynamical core and state-of-the-art parameterizations for microphysics, moist turbulence and radiation. It has been written from scratch in C++ with the Kokkos library used to abstract the on-node execution model for both CPUs and GPUs. SCREAM is one of only a few global atmosphere models to be ported to GPUs. As far as we know, SCREAM is the first such model to run on both AMD GPUs and NVIDIA GPUs, as well as the first to run on nearly an entire Exascale system (Frontier). On Frontier, we obtained a record setting performance of 1.26 simulated years per day for a realistic cloud resolving simulation.

Date 15 Feb 2024

Time

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ET: 11:30 am

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Time	Title	Presenter	Presentation	Recording	Notes
30 min	The Simple Cloud-Resolving E3SM Atmosphere Model Running on the Frontier Exascale System	Luca Bertagna	scream-sc23.pdf	MP4 Movie (on the E3SM YouTube Channel)

Time

Title

Presenter

Presentation

Recording

Notes

30 min

The Simple Cloud-Resolving E3SM Atmosphere Model Running on the Frontier Exascale System

Luca Bertagna

scream-sc23.pdf

MP4 Movie (on the E3SM YouTube Channel)

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