Figure 5: AMOC collapse and candidate early warning signals at each latitude. | Nature Communications

Figure 5: AMOC collapse and candidate early warning signals at each latitude.

From: Early warning signals of Atlantic Meridional Overturning Circulation collapse in a fully coupled climate model

Figure 5

(a) Annual time series of AMOC (Sv) at each latitude are cut before collapse begins at 800 years (solid vertical line). (b) Time series are also shown as a contour plot in the time-latitude plane. They are then detrended and the analysis carried out on the residuals (see Methods, example in Fig. 4). A sliding window length of 400 years is used (dotted vertical line in (a) marks the end of the first window) to estimate candidate early warning signals (see Methods): (c,d) AR(1) coefficient, and (e,f) variance. Time series are coloured according to their latitude and 26.25°N (as in Fig. 4) is shown in black and contour plots of the percentage change are also shown.

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