Figure 7: Linkage between reconstructed Mesoamerican precipitation and dominant modes of climate variability.
From: Persistent drying in the tropics linked to natural forcing
The different panels show wavelet coherences (power in colour shading) between the speleothem δ18O and: (a) the AMO reconstruction by Svendsen et al.31; (b) the integrated ENSO/PDO reconstruction by ref. 32; and (c) the difference between the two. The time series are shown in the top and middle panels (blue: δ18O; turquoise: AMO; magenta: ENSO; black: difference between AMO and ENSO). The arrows illustrate the phase relationship: rightward (leftward) arrows indicate co-phase (anti-phase); northward and southward oriented arrows indicate quadrature. Thick contour lines identify significant62 coherence. The thin black lines are the cone of influence, where edge effects occur.
