|Title:||Linear stability of steady zonal jet flows induced by a small-scale forcing on a plane|
Takehiro, Shin-ichi https://orcid.org/0000-0002-0857-3992 (unconfirmed)
|Author's alias:||小布施, 祈織|
|Journal title:||Physica D: Nonlinear Phenomena|
|Abstract:||We analytically obtain steady isolated zonal jet solutions of the evolution equation of zonal flows on a β plane with a homogeneous zonal flow and a small-scale sinusoidal transversal flow in the background, derived by Manfroi and Young (1999). It is shown that these steady zonal jet solutions are all linearly unstable. Numerical time integrations of the evolution equation also confirm that the perturbed unstable steady solution becomes a uniform flow in the long run. These results suggest that mergers/disappearances of zonal jets superposed upon background forced two-dimensional turbulence on a β plane or a rotating sphere might be due to the intrinsic instability of the zonal jets.|
|Rights:||© 2011 Elsevier B.V.|
This is not the published version. Please cite only the published version.
|Appears in Collections:||Journal Articles|
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