Christophe Millet
YOU?
Author Swipe
View article: Effets des ondes de gravité sur la propagation infrasonore : application à la caractérisation de source
Effets des ondes de gravité sur la propagation infrasonore : application à la caractérisation de source Open
International audience
View article: Mountain waves developing inside and aloft stably stratified turbulent boundary layers
Mountain waves developing inside and aloft stably stratified turbulent boundary layers Open
A linear theory of the trapped mountain waves that develop in a turbulent boundary layer is presented. The theory uses a mixing‐length turbulence model based on Monin–Obukhov similarity theory. First, the backward reflection of a stationar…
View article: Geometry-aware framework for deep energy method: an application to structural mechanics with hyperelastic materials
Geometry-aware framework for deep energy method: an application to structural mechanics with hyperelastic materials Open
Physics-Informed Neural Networks (PINNs) have gained considerable interest in diverse engineering domains thanks to their capacity to integrate physical laws into deep learning models. Recently, geometry-aware PINN-based approaches that em…
View article: Fixed-budget online adaptive learning for physics-informed neural networks. Towards parameterized problem inference
Fixed-budget online adaptive learning for physics-informed neural networks. Towards parameterized problem inference Open
Physics-Informed Neural Networks (PINNs) have gained much attention in various fields of engineering thanks to their capability of incorporating physical laws into the models. PINNs integrate the physical constraints by minimizing the part…
View article: Stratospheric Balloon Observations of Infrasound Waves From the 15 January 2022 Hunga Eruption, Tonga
Stratospheric Balloon Observations of Infrasound Waves From the 15 January 2022 Hunga Eruption, Tonga Open
The 15 January 2022 eruption of the Hunga volcano (Tonga) generated a rich spectrum of waves, some of which achieved global propagation. Among numerous platforms monitoring the event, two stratospheric balloons flying over the tropical Pac…
View article: Stratospheric balloon observations of infrasound wavesfrom the January 15 2022 Hunga eruption, Tonga
Stratospheric balloon observations of infrasound wavesfrom the January 15 2022 Hunga eruption, Tonga Open
The 15 January 2022 eruption of the Hunga volcano (Tonga) generated a rich spectrum of waves, some of which achieved global propagation. Among numerous platforms mon- itoring the event, two stratospheric balloons flying over the tropical P…
View article: Balloon-borne observations of acoustic-gravity wavesfrom the 2022 Hunga Tonga eruption in thestratosphere
Balloon-borne observations of acoustic-gravity wavesfrom the 2022 Hunga Tonga eruption in thestratosphere Open
Earth and Space Science Open Archive This preprint has been submitted to and is under consideration at Geophysical Research Letters. ESSOAr is a venue for early communication or feedback before peer review. Data may be preliminary.Learn mo…
View article: Stratospheric observations of acoustic-gravity waves from the Hunga-Tonga eruption
Stratospheric observations of acoustic-gravity waves from the Hunga-Tonga eruption Open
<p>In the frame of the Strateole 2 balloon project, 17 long-duration stratospheric balloons were launched from Seychelles in fall 2021. At the time of the main eruption of Hunga-Tonga on January 15 2022, two balloons were still in fl…
View article: Can We Improve the Realism of Gravity Wave Parameterizations by Imposing Sources at All Altitudes in the Atmosphere?
Can We Improve the Realism of Gravity Wave Parameterizations by Imposing Sources at All Altitudes in the Atmosphere? Open
A multiwave non‐orographic gravity wave (GW) scheme is adapted to represent waves of small intrinsic phase speed, inertial waves, and wave emission from all altitudes. This last change removes the launching altitude parameter, an arbitrary…
View article: Can we improve gravity wave parameterizations by imposing sources at all altitudes in the atmosphere?
Can we improve gravity wave parameterizations by imposing sources at all altitudes in the atmosphere? Open
<p>A multiwave non-orographic gravity wave (GW) scheme is adapted to represent waves of small intrinsic phase speed and sources located at all altitudes in the troposphere and middle atmosphere. Using reanalysis data, these changes i…
View article: Bayesian Selection of Atmospheric Profiles from an Ensemble Data Assimilation System using Infrasonic Observations of May 2016 Mount Etna Eruptions
Bayesian Selection of Atmospheric Profiles from an Ensemble Data Assimilation System using Infrasonic Observations of May 2016 Mount Etna Eruptions Open
Observed infrasound arrivals are considered as a way to provide additional knowledge of the middle atmosphere for numerical weather prediction (NWP) models. To do so, a Bayesian approach, based on the discrepancies between predicted and ob…
View article: Using Bayesian model averaging to improve ground motion predictions
Using Bayesian model averaging to improve ground motion predictions Open
SUMMARY In low-seismicity areas such as Europe, seismic records do not cover the whole range of variable configurations required for seismic hazard analysis. Usually, a set of empirical models established in such context (the Mediterranean…
View article: Tunisian infrasound detections from Mont Etna eruptions over May 2016
Tunisian infrasound detections from Mont Etna eruptions over May 2016 Open
Dear colleague,\n\nThis repository gathers datasets used in the article "Bayesian selection of atmospheric profiles from an ensemble data assimilation system using infrasonic observations of May 2016 Etna eruptions". This article was submi…
View article: Tunisian infrasound detections from Mont Etna eruptions over May 2016
Tunisian infrasound detections from Mont Etna eruptions over May 2016 Open
Dear colleague, This repository gathers datasets used in the article "Bayesian selection of atmospheric profiles from an ensemble data assimilation system using infrasonic observations of May 2016 Etna eruptions". This article was submitte…
View article: Non-orographic Gravity Waves: Representation in Climate Models and Effects on Infrasound
Non-orographic Gravity Waves: Representation in Climate Models and Effects on Infrasound Open
View article: An adiabatic foehn mechanism
An adiabatic foehn mechanism Open
Atmospheric mountain flows, produced when the incoming wind is small near the surface and continuously increases with altitude, are evaluated with models of increasing complexity. All models confirm that foehn can be produced by a mountain…
View article: An investigation of infrasound propagation over mountain ranges
An investigation of infrasound propagation over mountain ranges Open
Linear theory is used to analyze trapping of infrasound within the lower tropospheric waveguide during propagation above a mountain range. Atmospheric flow produced by the mountains is predicted by a nonlinear mountain gravity wave model. …
View article: Toward an Improved Representation of Middle Atmospheric Dynamics Thanks to the ARISE Project
Toward an Improved Representation of Middle Atmospheric Dynamics Thanks to the ARISE Project Open
View article: Inertia–gravity waves in inertially stable and unstable shear flows
Inertia–gravity waves in inertially stable and unstable shear flows Open
An inertia–gravity wave (IGW) propagating in a vertically sheared, rotating stratified fluid interacts with the pair of inertial levels that surround the critical level. An exact expression for the form of the IGW is derived here in the ca…