no code implementations • 8 Aug 2024 • Marc Bocquet, Alban Farchi, Tobias S. Finn, Charlotte Durand, Sibo Cheng, Yumeng Chen, Ivo Pasmans, Alberto Carrassi
The focus is on learning the analysis step of sequential DA, from state trajectories and their observations, using a simple residual convolutional neural network, while assuming the dynamics to be known.
no code implementations • 18 Mar 2023 • Sibo Cheng, Cesar Quilodran-Casas, Said Ouala, Alban Farchi, Che Liu, Pierre Tandeo, Ronan Fablet, Didier Lucor, Bertrand Iooss, Julien Brajard, Dunhui Xiao, Tijana Janjic, Weiping Ding, Yike Guo, Alberto Carrassi, Marc Bocquet, Rossella Arcucci
Data Assimilation (DA) and Uncertainty quantification (UQ) are extensively used in analysing and reducing error propagation in high-dimensional spatial-temporal dynamics.
no code implementations • 9 Sep 2020 • Julien Brajard, Alberto Carrassi, Marc Bocquet, Laurent Bertino
Moreover, the attractor of the system is significantly better represented by the hybrid model than by the truncated model.
no code implementations • 17 Jan 2020 • Marc Bocquet, Julien Brajard, Alberto Carrassi, Laurent Bertino
The reconstruction from observations of high-dimensional chaotic dynamics such as geophysical flows is hampered by (i) the partial and noisy observations that can realistically be obtained, (ii) the need to learn from long time series of data, and (iii) the unstable nature of the dynamics.