Fig. 4: Discrete wavelet transform of the nested Atlantic Multidecadal Variability reconstruction from this study. | Nature Communications

Fig. 4: Discrete wavelet transform of the nested Atlantic Multidecadal Variability reconstruction from this study.

From: Early warning signal for a tipping point suggested by a millennial Atlantic Multidecadal Variability reconstruction

Fig. 4

Contours provide the 90% confidence level of significance. The white line and the light white-shaded area below indicate the cone of influence. The cone of influence gives the spectrum borders where the edge effect (i.e., the time boundary effect) becomes too important, which cannot be robustly interpreted.

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