Fig. 10

Redfit spectral analyses of R_AK, CIA and K/Al at (a, d, g) DLW3101, (b, e, h) MD12-3429, and (c, f, i) MD12-3432 using the PAST software (Hammer et al. 2001). The false alarm levels of 95% and 90% are illustrated by red solid and dashed lines, respectively. The characteristic periodicities are noted together with the spectra. Redfit is a spectral analysis program that can estimate red-noise spectra directly from unevenly spaced paleoclimatic time series (Schulz and Mudelsee 2002)