Table 4 Main descriptive parameters and Fourier frequency results of the five ODP Site 846 SST components isolated by singular spectrum analysis. Original SST data from Herbert et al. (2010b) resampled at 1 kyr
SST component rank | SST comp. variance (%) | Frequency (kyr−1) | TISA power (%) | Period (kyr) | Weighted mean period (kyr) | Forcing |
|---|---|---|---|---|---|---|
1 | 87.8 | 0.0007899 | 83.3 | 1266 | Long-term trend + long-period orbital modulation and eccentricity cycles | |
0.0024651 | 8.6 | 406 | ||||
0.0033527 | 5.0 | 298 | ||||
0.0051684 | 3.1 | 193 | ||||
2 | 5.2 | 0.0105090 | 32.6 | 95 | Transition obliquity to short eccentricity | |
0.0110927 | 26.3 | 90 | ||||
0.0144249 | 41.1 | 69 | ||||
0.0244798 | – | 41 | Very low power peak | |||
3–4 | 4.5 | 0.0244852 | 69.3 | 41 | 40 | Obliquity |
0.0252735 | 18.4 | 40 | ||||
0.0268223 | 12.3 | 37 | ||||
5–7 | 1.6 | 0.0439726 | 31.6 | 23 | 22 | Precession |
0.0463271 | 43.1 | 22 | ||||
0.0487111 | 25.3 | 21 | ||||
8–11 | 0.5 | 0.0732060 | 36.7 | 14 | 12 | “Half-precession” (equatorial) |
0.0767562 | 30.5 | 13 | ||||
0.0946970 | 32.8 | 11 | ||||
> 11 | 0.4 | Noise |