Geophysical flows

J. Park - Paul Billant


J. Fluid Mech., X.Riedienger, S. Le Dizès and P. Meunier (2010).
Geophys. Res. Lett., C. Ménesguen et al. (2009)
J. Fluid Mech., J. Park and P. Billant (2012)

How does planetary rotation affects geophysical vortices ?

Geophysical vortices

Geophysical vortices are one the most famous subjects in geophysical fluid dynamics since, for example, they affect mixing properties in the oceans.

Numerical simulation of the Medditerranean eddy, from Ménesguen et al. 2009

Relative instability

Geophysical vortices are unstable due to an inertia-gravity wave emission, know as the radiative instability

Radiative instability on the flow around a rotating cylinder, from Riedinger et al. 2011


Investigate an effect of planetary rotation on the radiative instability of a columnar vortex in stratified fluids.


Numerical and asymptotic linear stability analyses.


The radiative instability is stabilized in the presence of both cyclonic and strong anticyclonic planetary rotations.