IMT-Atlantique & RIKEN Online Joint Seminar Series

Dr. Yicun Zhen (March 31, 2021, 16:30-17:00)

Affiliation Ifremer & IMT Atlantique
Title Location uncertainty from another point of view

We explore the definition and modeling of location uncertainty of coarse resolution models based on the snapshots of of the coarse resolution solution. We show the connection and difference between this definition of location uncertainty and Etienne Memin's model of location uncertainty.

Dr. Arata Amemiya (March 31, 2021, 17:00-17:30)

Affiliation R-CCS
Title Connecting Data Assimilation and Neural ODE

Neural ODE is a neural network model which parameterizes the time derivative or dynamics of the hidden state. Neural ODEs have an advantage over discrete-time recurrent neural networks in incorporating irregular input data. The adjoint method is used to compute gradients in Neural ODEs, like four-dimensional variational (4D-Var) data assimilation. We discuss the possible use of Neural ODEs in a model bias correction problem within the data assimilation context.

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