# What is the name of this equation?

I have found this picture but I don't know the name of the equation in it. Another thing, what kind of plots are those in the picture?

I have also tried to re copy it:

$$\frac{\overline{\partial\zeta}}{\partial t}=-\overline{\mathbf{u}'\cdot\nabla\zeta'}-\left(\overline{\mathbf{u}}\cdot\nabla\overline{\zeta}+\beta\overline{v}-f\frac{\partial \overline{w}}{\partial z}\right).$$

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found the picture :) rsmas.miami.edu/news-events/press-releases/2012/… – Alex Oct 12 '12 at 14:25
Why do you think this equation has a name? – Chris Eagle Oct 12 '12 at 18:35
Doing a google image search – Pragabhava Oct 12 '12 at 18:35
It is either Monet or Renoir :) – PAD Oct 12 '12 at 20:44

If I had to guess at what the parameters in the equation represent, I'd say $\vec{u}$ is the velocity, $\beta$ could be the "first-order effects of variations in Coriolis force with latitude in planetary dynamics" (from wikipedia), $\zeta$ could be the relative vertical vorticity (again, an educated guess from reading wikipedia), and $f$ is probably the Coriolis parameter. I'd also hazard a guess that $v$ and $w$ are the velocities in the $y$ direction (i.e. latitude) and $z$ direction (i.e. depth). Some fluid texts I've read use the prime symbol (i.e. $'$) to denote a small variation with respect to some reference.