Fig. 7: CLIMBER-2 wavelet and power spectra results.
From: Milankovitch-paced erosion in the southern Central Andes
a CLIMBER-2 precipitation and b temperature wavelet analyses and power spectra. The grid cell of CLIMBER-2 covers the area from 30–20°S and 65–116.4°W. Precipitation shows strong 23-kyr periodicities from 4.5 to 3 Ma, with strong 41-kyr periodicities from 3 to 2 Ma. In contrast, the temperature spectra are largely dominated by 400-kyr periodicities throughout both periods with 100-kyr and 41-kyr periodicities increasing in power at <3 Ma. The continuous black line in the wavelet analysis indicates areas of the spectrum susceptible to distortion due to edge effects of the time series. The dashed red line in the power spectrum and the black outlined areas in the wavelet plots indicate the 95%-confidence interval. Horizontal dashed lines in the power spectrum indicate the dominant orbital frequencies at 23, 41, 100, and 400-kyr periodicities.
