PNNL

Abstract

The development of the Simplified Cloud Resolving Energy Exascale Earth System Atmosphere Model (SCREAMv1) has brought significant advancements to global storm-resolving modeling by leveraging the computational power of modern GPU-based supercomputers. However, the high computational cost of SCREAMv1 limits its routine use for process-level studies, creating a need for efficient proxy configurations. This study addresses this gap by introducing DP-SCREAMv1, a doubly periodic cloud-resolving model designed to be fully consistent with SCREAMv1 while enabling high-resolution, long duration simulations at significantly reduced computational expense. Built on a C++/Kokkos architecture, DP-SCREAMv1 achieves exceptional performance scalability on GPU systems and includes a rich library of cases for validation and scientific exploration. In this work, we demonstrate that DP-SCREAMv1 makes simulations at SCREAMv1’s default resolution computationally trivial. Furthermore, we show that DP-SCREAMv1 enables routine execution of “Giga-LES” style simulations and facilitates large-domain, high-resolution simulations that were recently considered burdensome to perform. These advancements represent a significant leap forward in process-level atmospheric modeling and establish DP-SCREAMv1 as an indispensable tool for the E3SM/SCREAM community.