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Fig. 6


Time-averaged , normalised by urmsbrms, as a functionof z (solid black curve). The blue dash-dotted curve (very close to the black line) shows the same quantity but having removed low horizontal wavenumber components (kk1 ≤ 2) from the flow before calculating and . The red dashed curve shows the effects of removing more Fourier modes (kk1 ≤ 6).

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