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- W4220888051 abstract "<p>The scattering of short inertia-gravity waves by large-scale geostrophic turbulence in the atmosphere and ocean can be described as a diffusion of wave action in wavenumber space. When the time dependence of the turbulent flow is neglected, waves conserve their frequency, which restricts the diffusion of energy to the constant-frequency cone. We relax the assumption of time independence and consider scattering by a flow that evolves slowly compared with the wave periods, consistent with a small Rossby number. The weak diffusion across the constant-frequency cone introduced by time dependence leads to a stationary energy spectrum that remains localised around the cone (specifically decaying as 1/&#963;<sup>5</sup> with &#963; the angular deviation from the cone) corresponding to a small frequency broadening. We contrast our results with unbounded frequency broadening that arises for surface- or shallow-water waves.</p>" @default.
- W4220888051 created "2022-04-03" @default.
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- W4220888051 date "2022-03-27" @default.
- W4220888051 modified "2023-09-23" @default.
- W4220888051 title "Inertia-gravity wave diffusion by geostrophic turbulence: the impact of flow time dependence" @default.
- W4220888051 doi "https://doi.org/10.5194/egusphere-egu22-3214" @default.
- W4220888051 hasPublicationYear "2022" @default.
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