Below are links showing plots for the evolution of a random initial condition in the 2D (x-z) Eady model.  The "x-z loop" link shows an animation of streamfunction in the x-z plan starting from a random initial condition, and ultimately arriving at a state dominated by the most unstable mode. The "energy plot" link shows a diagram of the total eddy energy, which is flat for awhile, and then grows exponentially as the most unstable mode comes to dominate the solution.

x-z loop.
 

Energy plot.



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