Copula-based synthetic data augmentation for machine-learning emulators

@article{Meyer2021CopulabasedSD,
  title={Copula-based synthetic data augmentation for machine-learning emulators},
  author={David Meyer and Thomas Nagler and Robin J. Hogan},
  journal={Geoscientific Model Development},
  year={2021}
}
Abstract. Can we improve machine-learning (ML) emulators with synthetic data? If data are scarce or expensive to source and a physical model is available, statistically generated data may be useful for augmenting training sets cheaply. Here we explore the use of copula-based models for generating synthetically augmented datasets in weather and climate by testing the method on a toy physical model of downwelling longwave radiation and corresponding neural network emulator. Results show that for… 

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