Equatorial regions of planetary atmospheres, oceans and stars experience a rich variety of dynamical regimes, with common underlying physical mechanisms. On Earth, stratospheric winds undergo regular reversals with a 28 month period, oceanic currents are organized into vertically alternating jets, and the emergence of equatorial modes of variability such as the Madden Julian Oscillation remain a mysterious aspect of our climate system. In many planetary atmospheres, such as Jupiter, Saturn, Venus or Titan, the winds are in a superrotating state with a strong eastward jet above the equator. Owing to tremendous progress in observational techniques and computational capabilities, similar phenomena are currently being discovered in stars and exoplanets, while phase diagrams of possible dynamical regimes for astrophysical and geophysical flows are being mapped by systematic exploration of parameter space using numerical simulations.
Meanwhile, theoretical tools from topology, nonlinear dynamics and quasilinear approaches are bringing new insights into the physics of equatorial waves and how they interact with mean-flows, underlying the robustness and the universality of the observed phenomena across these different fields. Physical mechanisms in different regimes parameters have been proposed, but a common framework in astrophysical and geophysical flows is still lacking.
The aim of this interdisciplinary workshop is to gather specialists from different communities interested in equatorial phenomena, from linear effects to fully turbulent flows, from laboratory experiments to atmospheric dynamics and astrophysics. We intend to fertilize new collaborations and foster exchange of ideas between these different fields.
Registration is free but mandatory. Participants will be given the opportunity to present their results in a poster session. Registration deadline: July 13, 2019.
Speakers
Isabelle Baraffe | University of Exeter
Freddy Bouchet | CNRS, ENS de Lyon
Michael Byrne | University of St Andrews & University of Oxford
Rodrigo Caballero | University of Stockholm
Florian Debras | IRAP, Toulouse
Pierre Delplace | CNRS, ENS de Lyon
Sebastien Fromang | CEA Saclay
Sandrine Guerlet | CNRS, LMD, Paris
Christophe Gissinger | ENS Paris
Laurent Gizon | MPI Goettingen
Mickael Le Bars | CNRS, IRPHE, Marseille
Sébastien Lebonnois | CNRS, LMD, Paris
Claire Menesguen | Ifremer, Brest
Antoine Renaud | University of Edinburgh
Tamara Rogers | Newcastle University
Benoît Semin | CNRS, ESPCI, Paris
Josef Schröttle | Tel Aviv University
Geoff Vallis | University of Exeter
Vladimir Zeitlin | LMD, Paris
Pablo Zurita-Gotor | Universidad Complutense de Madrid
