16 Feb 2021
16 Feb 2021
Producing realistic climate data with GANs
- 1CERFACS, Toulouse, France
- 2CNRM, Université de Toulouse, Météo-France, CNRS, Toulouse, France
- 3Institut de Mécanique des Fluides de Toulouse (IMFT), Université de Toulouse, CNRS, Toulouse, France
- 4Institut National Polytechnique de Toulouse
- 1CERFACS, Toulouse, France
- 2CNRM, Université de Toulouse, Météo-France, CNRS, Toulouse, France
- 3Institut de Mécanique des Fluides de Toulouse (IMFT), Université de Toulouse, CNRS, Toulouse, France
- 4Institut National Polytechnique de Toulouse
Abstract. This paper investigates the potential of a Wasserstein Generative Adversarial Networks to produce realistic weather situations when trained from the climate of a general circulation model (GCM). To do so, a convolutional neural network architecture is proposed for the generator and trained on a synthetic climate database, computed using a simple 3 dimensional climate model: PLASIM.
The generator transforms a latent space
, defined by a 64 dimensional Gaussian distribution, into spatially defined anomalies on the same output grid as PLASIM. The analysis of the statistics in the leading empirical orthogonal functions shows that the generator is able to reproduce many aspects of the multivariate distribution of the synthetic climate. Moreover, generated states reproduce the leading geostrophic balance present in the atmosphere.
The ability to represent the climate state in a compact, dense and potentially nonlinear latent space opens new perspectives in the analysis and the handling of the climate. This contribution discusses the exploration of the extremes close to a given state and how to connect two realistic weather situations with this approach.
Camille Besombes et al.
Status: open (until 13 Apr 2021)
Camille Besombes et al.
Model code and software
Producing-realistic-climate-data-with-GANs Camille Besombes https://doi.org/10.5281/zenodo.4442450
Camille Besombes et al.
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