Early warning of the YD termination/Holocene beginning based on different signals. (a) The solid black line is the original reconstructed grayscale data from the Cariaco Basin core PL07-56P, 11.6–12.5 kyr BP (n = 2111). The smooth red line passing through the time series is the Gaussian kernel function used to filter out the slow trends. The horizontal dashed line indicates the length of sliding window (1055 points) for analysis, and the red vertical dotted line marks the cutoff time for analysis. (b) The changing AR(1) propagator of the grayscale time series. (c) The results of variance. (d) The results of Hurst exponent H. (e) The results of DFA-propagator. For R/S and DFA analysis, the subsequence length s increases gradually at intervals of 1 from 10 to 100.
Citation: Journal of Climate 37, 2; 10.1175/JCLI-D-22-0263.1
