Fig. 5
From: Deglacial mobilization of pre-aged terrestrial carbon from degrading permafrost
Zoom-in on proposed 3 events of coastal erosion-based carbon cycle changes. CO2 changes for a 14.6 kyr-event, c 11.5 kyr-event, d 16.5 kyr-event. Circles are CO2 data from ice cores (refs. 12, 13, data as in ref. 69). b Radiocarbon impacts during 14.6 kyr-event. IntCal13 (black with grey uncertainty band). High-resolution U/Th-dated ∆14C from Tahiti corals (magenta)31. Linear change in the Tahiti-based data 14C calculated with the Breakfit software (cyan bold line)70 and mean of Tahiti ∆14C data before and after break (bold black circles). Simulated ∆(∆14C) based on 5 (red broken) and 10 (red thin) kyrs pre-depositional aged carbon and for a scenario with prescribed ∆(∆14C) of −1250‰ (red thick) potentially possible from radiocarbon free CO2 (pre-depositional age > 30 kyrs). Alternatively, a background trend in ∆(∆14C) of −0.1‰ per year was added to the scenarios (blue lines). All uncertainties are ± 1σ
