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Progress in Earth and Planetary Science
Fig. 6 | Progress in Earth and Planetary Science

Fig. 6

From: δ18O and SST signal decomposition and dynamic of the Pliocene-Pleistocene climate system: new insights on orbital nonlinear behavior vs. long-term trend

Fig. 6

Time-series panel of the ODP Site 846 SST component-1 and its subcomponents isolated by singular spectrum analysis. SST comp-1 exponential trend (°C) = 33.58041–11.84075 e(−t/8830.503). The vertical brown arrows show four subtrends of component-1 and their correlation to the NHG transitions known in the literature (MBO this study). To the right, Fourier frequency spectrum of SST detrended comp-1 subcomp-3-11 (2.84% variance) for three time intervals are highlighted by red boxes. Note the increase in amplitude after the ONHG (but not after the MPT) and the power increase of the ~ 93-kyr eccentricity cycle. x-axis scale variable (°C). The y-axis scale of the frequency spectrum increases upwards. Time scale in kyr

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