Fig. 9
Four frequency regimes present in the spectra. Regions I, II, III and IV are the same as in Fig. 8, generated for a step chromospheric profile with upper and lower plateau depths of a = b = 0.9 Mm and a white noise velocity source. ΔT is 2600 K. The line indicates the gradient of the power in region III, which is –2.62 in this case.
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