3 citations · 3 across the 2 of their papers we have counts for
6 papers
Alignments of Geophysical Fields: a differential geometry perspective
Yicun Zhen, Valentin Resseguier, Bertrand Chapron
To estimate the displacements of physical state variables, the physics principles that govern the state variables must be considered. Technically, for a certain class of state vari…
Physically Constrained Covariance Inflation from Location Uncertainty
Yicun Zhen, Valentin Resseguier, Bertrand Chapron
Motivated by the concept of ``location uncertainty", initially introduced in \cite{Memin2013FluidFD}, a scheme is sought to perturb the ``location" of a state variable at every for…
Geophysical flows under location uncertainty, Part III: SQG and frontal dynamics under strong turbulence conditions
Valentin Resseguier, Etienne Memin, Bertrand Chapron
Models under location uncertainty are derived assuming that a component of the velocity is uncorrelated in time. The material derivative is accordingly modified to include an advec…
Geophysical flows under location uncertainty, Part II: Quasi-geostrophy and efficient ensemble spreading
Valentin Resseguier, Etienne Memin, Bertrand Chapron
Models under location uncertainty are derived assuming that a component of the velocity is uncorrelated in time. The material derivative is accordingly modified to include an advec…
Stochastic modelling and diffusion modes for proper orthogonal decomposition models and small-scale flow analysis
Valentin Resseguier, Etienne Mémin, Dominique Heitz +1
We present here a new stochastic modelling in the constitution of fluid flow reduced-order models. This framework introduces a spatially inhomogeneous random field to represent the…
Geophysical flows under location uncertainty, Part I Random transport and general models
Valentin Resseguier, Etienne Mémin, Bertrand Chapron
A stochastic flow representation is considered with the Eulerian velocity decomposed between a smooth large scale component and a rough small-scale turbulent component. The latter…