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Journal articles
Phase transitions and marginal ensemble equivalence for freely evolving flows on a rotating sphere
Abstract : The large-scale circulation of planetary atmospheres like that of the Earth is traditionally thought of in a dynamical framework. Here, we apply the statistical mechanics theory of turbulent flows to a simplified model of the global atmosphere, the quasi-geostrophic model, leading to non-trivial equilibria. Depending on a few global parameters, the structure of the flow may be either a solid-body rotation (zonal flow) or a dipole. A second order phase transition occurs between these two phases, with associated spontaneous symmetry-breaking in the dipole phase. This model allows us to go beyond the general theory of marginal ensemble equivalence through the notion of Goldstone modes.
https://hal-cea.archives-ouvertes.fr/cea-00917336
Contributor : Marianne Leriche Connect in order to contact the contributor
Submitted on : Wednesday, December 11, 2013 - 4:36:02 PM
Last modification on : Wednesday, October 20, 2021 - 3:47:05 AM
Contributor : Marianne Leriche Connect in order to contact the contributor
Submitted on : Wednesday, December 11, 2013 - 4:36:02 PM
Last modification on : Wednesday, October 20, 2021 - 3:47:05 AM
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