Figure 1

From: Punctuated Shutdown of Atlantic Meridional Overturning Circulation during Greenland Stadial 1

Figure 1

Comparison between Greenland δ18O (A)19, atmospheric radiocarbon datasets21,22,24,29,30 (B), ocean radiocarbon datasets (marine reservoir corrected) expressed as age23,31 (C), Cariaco Basin greyscale31 (D), the Interhemispheric Gradient with 5-point running mean (solid black line) and mean values during the two identified regimes (dashed red lines) (E), atmospheric CO2 concentration (F) and δ18O (G), West Antarctic Ice Sheet (WAIS) Divide12. Greenland interstadial and stadial events (GI and GS respectively) are shown on A19. Dark grey columns denote significant slowdown/shutdown of AMOC within GS-1 (divergence between atmospheric and Atlantic marine 14C ages >2 sigma); the dashed lines define the GS-1 chronozone19. Note, the uncertainty in the WAIS Divide chronology during the termination of the Antarctic Cold Reversal (ACR) around 12,800 cal BP is ± 240 years12. All error bars denote 1σ. The gap in the IHG record (E) is due to an absence of NH data.