Fig. 5: Deglacial deep-ocean reservoir age variations in the Southern Ocean. | Nature Communications

Fig. 5: Deglacial deep-ocean reservoir age variations in the Southern Ocean.

From: Glacial heterogeneity in Southern Ocean carbon storage abated by fast South Indian deglacial carbon release

Fig. 5

a, c, e Benthic foraminiferal 14C age offsets in MD12-3396CQ (3.6 km water depth, WD) from the contemporaneous atmosphere, d14RB-Atm (blue), compared to deep-ocean ventilation ages in the deep sub-Antarctic Atlantic (MD07-3076CQ, 3.8 km WD; upstream, green5), on the Chatham Rise (MD97-2121, 2.3 km WD; downstream, orange30), in the New Zealand area (1.6-3.5 km WD; downstream, red33), and south of Tasmania (corals, 1.4–1.9 km WD; downstream, purple35), and b, d, f atmospheric CO2 (CO2,atm) changes. Lower panels zoom in on d14RB-Atm variations during specific intervals of rapid centennial CO2,atm increase32, i.e. the ~11.7 (c, d) and ~14.8 kyr events (e, f). Lines and envelopes show 1 kyr- (a) and 0.5 kyr- (c–f) running averages and 1σ-uncertainty-/66%-probability ranges. Vertical bars indicate intervals of rising CO2,atm levels (dark bands highlight periods with centennial-scale CO2,atm increases)32. HS1 Heinrich Stadial 1, ACR Antarctic Cold Reversal, BA Bølling Allerød, YD Younger Dryas.

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