Wavelet plane of the models considered in Sect. 5 but for complete coverage in frequency. Top: regular field of model 1 (compare with Fig. 4) and of model 2 (compare with Fig. 5). Middle: regular field with one reversal (compare with Fig. 6) and with two reversals (compare with Fig. 7). Bottom: turbulent field superimposed on the regular field of model 1 (compare with Fig. 9) and turbulent field superimposed on the regular field with one reversal (compare with Fig. 10).