Table 2.

Periods and relative amplitudes of the main astronomical forcing cycles for 0–10 Ma (Laskar et al. 2004; Hinnov & Hilgen 2012). The frequencies and relative amplitudes change over different time intervals, and relative amplitudes change additionally as the result of climatic filtering

Astronomical parameterPeriod in kiloyears (relative amplitude)
Orbital eccentricity405 (1.0)131 (0.43)124 (0.56)99 (0.48)95 (0.74)
Obliquity (tilt)53.04 (0.34)40.80 (1.0)40.11 (0.33)39.45 (0.42)29.75 (0.16)
Precession index23.61 (1.0)22.33 (0.87)19.07 (0.45)19.12 (0.69)16.44 (0.08)