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Fig. 4


Growth rates ζr in an inviscid, weakly thermally stratified atmosphere with θ = 0.5 for a Richardson number of Ri = 0.22. In a) the fluid is compressible with M = 0.09 and in b) M = 0.009, which corresponds to a incompressible fluid. The Péclet number is varied among three orders of magnitude.

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