Extended Data Fig. 10: Lead-lag analysis of model forcing and predictions with comparison to observations.
From: Abrupt changes in the global carbon cycle during the last glacial period
Left panel. Lead-lag correlation of factorial model experiments between proxy forcing and simulated CO2. Factorial experiments include: AABW formation (dark blue); ‘Iron Fertilization’/nutrient utilization (yellow); Antarctic sea ice extent (light blue); NADW formation (red); North Atlantic temperature (purple). Right panel. Lead-lag correlation of the WD-δ18O (dash dark blue) and NGRIP- δ18O (dashed purple) that enter the model as forcings against simulated CO2 in the ‘combined scenario’. This mimics the lead-lag correlation performed on the real ice core data and presented in the main body of the text between WD-CO2 and WD- δ18O (shaded blue envelope) and WD-δ18O and NGRIP-δ18O (shaded purple envelope).
