Figure 5: Spectral analysis of the FSL reconstruction and dominant frequencies.
From: Corals record long-term Leeuwin current variability including Ningaloo Niño/Niña since 1795
(a) Multi-taper spectrum of reconstructed FSL (1795–1993) based on linear model with PC1 of Kuhnert et al.12 and reconstructed ENSO index (COA) of Wilson et al.21 combined with observed FSL (1994–2010). The mean frequency of the main bands is indicated. Confidence levels for 10, 5 and 1% are indicated as red lines with the upper line being the 1% level. (b–d) Reconstructed components of the FSL reconstruction with years from 1994 to 2010 based on observed FSL. All frequencies with P<0.05. Explained variance indicated in brackets. (b) 9–12 year, (c) 5.6 year and (d) 3.65 year frequency.
