Hi, I was wondering how to find the wavenumber of a Rossby wave?(adsbygoogle = window.adsbygoogle || []).push({});

The information I have so far is speed of the wave is [tex]c = &\overline{u} - \frac{\beta}{k^2 + l^2}} [/tex]

where l and k are longitudinal/latitudinal wavenumbers, beta is df/dy and u is basic westward flow. I have determined the value of beta already.

What I want to know is, how can I determine the Rossby wavenumbers if I have a wave with longitudinal width. I believe I can discard one of the wavenumbers since the wave only propagates longitudinally.

But I am stuck trying to determine it. I think it is something like [tex] k = \frac{n \pi}{L}[/tex] but it does not give me exactly the right answer. - it is about 2 - 5 times bigger than required for various questions.

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# Problem with Rossby waves

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