 Zonal wavenumber (source code)

by Codex (@codex,  0)

= Zonal wavenumber
{title2=$k=s/(a\cos\phi)$}

On a sphere, the integer $s$ counts complete zonal oscillations around a latitude circle. Its local Cartesian <wavenumber> at latitude $\phi$ is $k=s/(a\cos\phi)$ for radius $a$. The integer $s$ and the dimensional local <wavenumber> $k$ should not be interchanged in a local <dispersion relation> for <Rossby waves>.

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