Extended Data Fig. 7: Ice core tuning, 48–59 ka.

δ¹⁸O and chronology of the NGRIP ice core^{1,17,80,81,82,91} in comparison to ELSA-20 C_org(chlorins) content and Si/Al. The ELSA-20 C_org(chlorins) data are also shown in the kernel detrended version used for the wavelet and spectra as shown in Figs. 3-5.