Rossby parameter


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Rossby parameter

[′rȯs·bē pə‚ram·əd·ər]
(fluid mechanics)
The northward variation of the Coriolis parameter, arising from the sphericity of the earth. Also known as Rossby term.
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where [[psi].sub.0] is the amplitude of perturbation of stream function [psi], k and l are the zonal and meridional wavenumbers, [beta] = [partial derivative]f/[partial derivative]y is the Rossby parameter, and [u".sub.0] = [d.sup.2][u.sub.0]/[dy.sup.2].
In this [beta] = [[beta].sup.*][L.sup.2]/U, [[beta].sup.*] is Rossby parameter. U is characteristic velocity, L is characteristic length, and [L.sub.y] is the width of the beta-channel.
Recently, the Rossby parameters [beta] along with the changes of latitude were discussed by Luo [6] and [beta] plane approximation was obtained.