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- W4378469105 abstract "Climate simulations are essential in guiding our understanding of climate change and responding to its effects. However, it is computationally expensive to resolve complex climate processes at high spatial resolution. As one way to speed up climate simulations, neural networks have been used to downscale climate variables from fast-running low-resolution simulations, but high-resolution training data are often unobtainable or scarce, greatly limiting accuracy. In this work, we propose a downscaling method based on the Fourier neural operator. It trains with data of a small upsampling factor and then can zero-shot downscale its input to arbitrary unseen high resolution. Evaluated both on ERA5 climate model data and on the Navier-Stokes equation solution data, our downscaling model significantly outperforms state-of-the-art convolutional and generative adversarial downscaling models, both in standard single-resolution downscaling and in zero-shot generalization to higher upsampling factors. Furthermore, we show that our method also outperforms state-of-the-art data-driven partial differential equation solvers on Navier-Stokes equations. Overall, our work bridges the gap between simulation of a physical process and interpolation of low-resolution output, showing that it is possible to combine both approaches and significantly improve upon each other." @default.
- W4378469105 created "2023-05-27" @default.
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- W4378469105 date "2023-05-23" @default.
- W4378469105 modified "2023-10-16" @default.
- W4378469105 title "Fourier Neural Operators for Arbitrary Resolution Climate Data Downscaling" @default.
- W4378469105 doi "https://doi.org/10.48550/arxiv.2305.14452" @default.
- W4378469105 hasPublicationYear "2023" @default.
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