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Oceananigans.jl: A Julia library that achieves breakthrough resolution, memory and energy efficiency in global ocean simulations

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arxiv 2309.06662 v2 pith:4QVYGUGB submitted 2023-09-13 physics.ao-ph cs.DCphysics.comp-phphysics.flu-dyn

Simone Silvestri , Gregory L. Wagner , Christopher Hill , Matin Raayai Ardakani , Johannes Blaschke , Jean-Michel Campin , Valentin Churavy , Navid C. Constantinou
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Alan Edelman John Marshall Ali Ramadhan Andre Souza Raffaele Ferrari
This is my paper · ORCID
classification physics.ao-phcs.DCphysics.comp-phphysics.flu-dyn
keywords oceanbreakthroughoceananigansclimateefficiencyglobalsimulationssypd
verification ladder T0 review T1 audit T2 compute T3 formal
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Climate models must simulate hundreds of future scenarios for hundreds of years at coarse resolutions, and a handful of high-resolution decadal simulations to resolve localized extreme events. Using Oceananigans.jl, written from scratch in Julia, we report several achievements: First, a global ocean simulation with breakthrough horizontal resolution -- 488m -- reaching 15 simulated days per day (0.04 simulated years per day; SYPD). Second, Oceananigans simulates the global ocean at 488m with breakthrough memory efficiency on just 768 Nvidia A100 GPUs, a fraction of the resources available on current and upcoming exascale supercomputers. Third, and arguably most significant for climate modeling, Oceananigans achieves breakthrough energy efficiency reaching 0.95 SYPD at 1.7 km on 576 A100s and 9.9 SYPD at 10 km on 68 A100s -- the latter representing the highest horizontal resolutions employed by current IPCC-class ocean models. Routine climate simulations with 10 km ocean components are within reach.

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Cited by 2 Pith papers

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  2. Route survival and spectral modification of finite-depth salt-finger plume forests under imposed mean shear

    physics.flu-dyn 2026-07 conditional novelty 4.0 of 10

    Imposed mean shear preserves the vertical reach and contact timing of finite-depth salt-finger plume forests while redistributing their spectral energy pathway.

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