Figure 3

Spectral analysis of time-series'.

Bias-corrected spectra of (A) the original temperature reconstruction and (B) the new PTP temperature reconstruction. Solid line is the spectrum, dashed line is the 99% and dotted line is the 95% false-alarm level. Frequencies are reported as 1/years and spectral amplitudes are plotted on a logarithmic decibel [dB] scale.