Member Since 2018
Alain Pumir
Research Director, Ecole Normale Superieure Lyon
AGU Research
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Lagrangian irreversibility in rotating-stratified turbulent flows
GEOPHYSICAL FLUID DYNAMICS: PHYSICS-INFORMED MACHINE LEARNING I ORAL
nonlinear geophysics | 14 december 2023
Alain Pumir, Sebastian Gallon
In homogenous and isotropic turbulence, two particles separate faster backwards than forward in time, a manifestation of the irreversibility induced b...
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Nonlinear dynamics of droplets and ice crystals in turbulent clouds.
LORENZ LECTURE
nonlinear geophysics | 13 december 2023
Alain Pumir
Clouds consist of moist air and very small particles, water droplets and/or ice crystals, depending on the temperature conditions. These small particl...
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Buoyancy Flux and Helicity Trends in Stably Stratified Turbulence
GEOPHYSICAL FLUID DYNAMICS IV POSTER
nonlinear geophysics | 13 december 2022
Fabio Feraco, Raffaele Marino, Raffaello Foldes, L...
Geophysical fluids are known to develop large-scale extreme events in the vertical velocity and temperature field which have been recently captured by...
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Extreme vertical drafts and the modulation of local energy dissipation in stratified geophysical flows
GEOPHYSICAL FLUID DYNAMICS IV POSTER
nonlinear geophysics | 13 december 2022
Raffaele Marino, Alain Pumir, Duane L. Rosenberg, ...
Stratified geophysical flows can develop extreme events in the form of bursts in the temperature and in the vertical velocity, resulting from the inte...
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Turbulence generation by large-scale extreme vertical drafts in stratified geophysical flows
ATMOSPHERIC GRAVITY WAVES, FROM THE SURFACE TO THE EDGE OF SPACE III POSTER
spa-aeronomy | 16 december 2021
Raffaele Marino, Fabio Feraco, Leonardo Primavera,...
Recent studies based on direct numerical simulations (DNS) have shown that stably stratified geophysical flows can develop sporadic, extreme events in...
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A Link between Large- and Small-scale Intermittency in Stratified Turbulent Flows
GEOPHYSICAL FLUID DYNAMICS III POSTER
nonlinear geophysics | 15 december 2021
Harikrishnan charuvil Asokan, Fabio Feraco, Raffae...
Large-scale intermittent vertical drafts and temperature bursts seem to be the key to a better characterization of turbulent stratified flows. These e...
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Alignment of ice crystals settling in turbulent clouds
GEOPHYSICAL FLUID DYNAMICS II
nonlinear geophysics | 16 december 2020
Alain Pumir, Kristian Gustavsson, Md Zubair Sheikh...
Small non-spherical particles settling in a quiescent fluid tend to orient so that their broad side faces down, because this is a stable fixed point o...
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Stochastic Interpolation of Sparsely Sampled Time Series via Multi-point Fractional Brownian Bridges
GEOPHYSICAL FLUID DYNAMICS III POSTERS
nonlinear geophysics | 16 december 2020
Jan Friedrich, Sebastian Gallon, Alain Pumir, Rain...
A considerable number of problems in physics, e.g., cosmic ray propagation in multi-scale magnetic fields, suffer from sparse sampling and thus have t...
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