Unidirectional Modes Induced by Nontraditional Coriolis Force in Stratified Fluids.

  title={Unidirectional Modes Induced by Nontraditional Coriolis Force in Stratified Fluids.},
  author={N. Perez and Pierre Delplace and Antoine Venaille},
  journal={Physical review letters},
  volume={128 18},
Using topology, we unveil the existence of new unidirectional modes in compressible rotating stratified fluids. We relate their emergence to the breaking of time-reversal symmetry by rotation and vertical mirror symmetry by stratification and gravity. We stress the role of the Coriolis force's nontraditional part, induced by a rotation field tangent to the surface. In contrast with horizontally trapped equatorial waves induced by the traditional component of the Coriolis force perpendicular to… 

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