FIGURE 4. Critical slowing down indicated by an increase in lag-1 autocorrelation in climate dynamics.
From the following article:
Early-warning signals for critical transitions
Marten Scheffer, Jordi Bascompte, William A. Brock, Victor Brovkin, Stephen R. Carpenter, Vasilis Dakos, Hermann Held, Egbert H. van Nes, Max Rietkerk & George Sugihara
Nature 461, 53-59(3 September 2009)
doi:10.1038/nature08227
We show the period preceding the transition from a greenhouse state to an icehouse state on the Earth 34 Myr ago. The trends in the CaCO3 concentration time series removed by filtering before computing autocorrelation (AR(1) coefficient) are represented by the grey line. The horizontal dashed arrow shows the width of the moving window used to compute the autocorrelation. Modified from ref. 22.
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