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Alexandre Stegner

Cursus :

Alexandre Stegner est chargé de recherche CNRS au Laboratoire de Météorologie Dynamique.

Publications :

  • A.Aouidef, C.Normand, A.Stegner and J.E. Wesfreid "Centrifugal instability of pulsed flow" Physics of Fluids, vol 6, No 11, November 1994.
  • A. Stegner, V. Zeitlin "What can asymptotic expension tell us about large-scale quasi-geostrophic anticyclonic vortices?" Non-Linear Process in Geophysics, 2, 186-193 (1995).
  • A. Stegner, V. Zeitlin "Asymptotic expansions and monopolar solitary Rossby vortices in barotropic and two-layer models" Geophysical and Astrophysical Fluid Dynamics, 83, 159-195 (1996).
  • A. Stegner, V. Zeitlin "From quasi-geostrophic to large scale monopolar vortices in a paraboloidal shallowwater layer experiment" Journal of Fluid Mechanics , v.356, 1-24 (1998).
  • A. Stegner, V. Zeitlin "Vortex solitons in stably stratified differentially rotating fluid", Clarendon Press, Oxford (1999). ISBN 0 19 8500157.
  • A. Stegner, J.E. Wesfreid "Dynamical evolution of sand ripples under water" Phys. Rev. E, v.60, 3487-3490 (1999).
  • A. Stegner, D. Dritschel "A numerical investigation of the stability of isolated shallow-water vortices" Journal of Physical Oceanography, v.30, 2562-2573 (2000).
  • G. Rousseau, A.Stegner, J.E. Wesfreid "Wavelength selection of rolling grain ripples" Phys Rev. E v.69,031307 (2004).
  • A. Stegner, P. Bouruet-Aubertot, T. Pichon "Nonlinear geostrophic adjustment of density fronts. Part I : the Rossby scenario and the experimental reality" J. Fluid Mech. V.502, 335-360 (2004).
  • G. Rousseau, H. Yoshikawa, A.Stegner, J.E. Wesfreid "Dynamics of transient vortex above rolling-grain ripples" Physics of Fluids, v. 16, No 4, 1049-1058 (2004).
  • A.Stegner, T. Pichon, M. Beunier "Elliptical-inertial instability of rotating Karman street" Physics of Fluids, v.17 066602 p1-10 (2005).
  • G. Perret, A Stegner, T Dubos, JM Chomaz, M Farge “Stability of parallel wake flows in quasigeostrophic and frontal regimes” Physics of Fluids 18, 126602 (2006).
  • G. Perret, A Stegner, M Farge, T Pichon “Cyclone-anticyclone asymmetry of large scale wakes in laboratory” Physics of Fluids 18, 036603 (2006).
  • S. Teinturier, A. Stegner, S. Viboud and H. Didelle « Small-scale instabilities of an island wake flow in a rotating shallow-water layer » Dynamics of Atmosphere and Ocean, v.39, 1-24 (2010) DOI 10.1016/J.Dynatmoce.2008.10.006.
  • G.G. Sutyrin, A. Stegner, I. Taupier-Letage and S. Teinturier « Amplification of a surface-intensified eddy drift along steep shelf in the eastern Mediterranean sea » Journal of Physical Oceanography, v.39, 1729-1741 (2009).
  • G.Perret, T.Dubos, A.Stegner « How large scale barotropic instabilites favor the formation of anticyclonic vortices in the ocean » Submitted to Journal of Physical Oceanography (2009).

Affiliation : CNRS / ENS

Statut : Enseignant chercheur Laboratoire de météorologie dynamique

Liens :

   - Laboratoire de météorologie
   - Page personnelle d'Alexandre Stegner au LMD

Exposé(s) :
photoExpose
Tempêtes dans des bassines d’eau : modélisation expérimentale des écoulements géophysiques
Alexandre Stegner

Au travers de l’analyse dimensionnelle, de quelques concepts simples et d’expériences de laboratoires nous allons essayer de comprendre certains comportements dynamiques des structures atmosphériques de petites et grande échelle. Il est né...
Mots-clés : cyclone , mécanique , météorologie , tourbillon , vorticité