CFC2023

MS3-01 - Climate modeling through scientific computing and machine learning

M. Perego (Center for Computing Research, Sandia National Laboratories, Albuquerque) *, S. Calandrini ( Fluid Dynamics and Solid Mechanics Group, Los alamos National Laboratory, Los Alamos) , C. Eldred ( Center for Computing Research, Sandia National Laboratories, Albuquerque,) , I. Tezaur (Quantitative Modeling and Analysis Department, Sandia National Laboratories, Livermore)

Earth system modeling poses a wide range of computational challenges. The dynamics of many climate components, e.g. atmosphere, ocean, land ice and sea ice, are governed by fluid flow equations, and characterized by different spatial and temporal scales and specific physical properties that need to be preserved by numerical models. This demands the use of a wide range of non-trivial spatial discretizations, including mesh-based methods like spectral element, finite volume and finite element methods, and particle-based methods such as the discrete element and material point methods, together with advanced temporal discretizations. Moreover, these discretizations need to be amenable to running efficiently on emerging heterogeneous architectures. Climate models are also characterized by complex physical processes that are not fully resolved (e.g. cloud formation) and are modeled with parameterizations. Several efforts are being made to replace these parametrizations with data-driven models trained using observational or simulation data. More in general, machine learning models are being used to enhance the current models with deep learning models for improving numerical stabilization, turbulence models or for replacing parts of the climate models with inexpensive surrogates. In this mini-symposium we focus on computational approaches for fluid problems arising in climate modeling, ranging from advanced discretizations and their implementation for heterogeneous architectures, to machine learning approaches for enhancing climate models.