2021/03/12 by Alexei Belochitski, Belochitski, Alexei, Vladimir A. Krasnopolsky +1
Computer Science · Medicine · Physics and Astronomy · #Atmospheric and Oceanic Physics (physics.ao-ph) #FOS: Physical sciences #Gaussian Processes and Bayesian Inference #Medical Imaging Techniques and Applications #Model Reduction and Neural Networks
paper · pdf · doi:10.48550/arxiv.2103.07024
openalex publication_date 2021/03/12 · openalex created_date 2022/07/25 · openalex updated_date 2026/07/28
The ability of Machine-Learning (ML) based model components to generalize to the previously unseen inputs, and the resulting stability of the models that use these components, has been receiving a lot of recent attention, especially when it comes to ML-based parameterizations. At the same time, ML-based emulators of existing parameterizations can be stable, accurate, and fast when used in the model they were specifically designed for. In this work we show that shallow-neural-network-based emulators of radiative transfer parameterizations developed almost a decade ago for a state-of-the-art GCM are robust with respect to the substantial structural and parametric change in the host model: when used in the AMIP-like experiment with the new model, they not only remain stable, but generate realistic output. Aspects of neural network architecture and training set design potentially contributing to stability of ML-based model components are discussed.