Fig. 4: Deglacial ocean reservoir age variations reconstructed in South Indian core MD12-3396CQ. | Nature Communications

Fig. 4: Deglacial ocean reservoir age variations reconstructed in South Indian core MD12-3396CQ.

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

Fig. 4

a Surface-ocean reservoir age (d14RP-Atm) constraints from the Southern Ocean for the deglacial and glacial periods: Chilean Margin (MD07-3088, light green, tephra-based)7, in the New Zealand area (orange30, red31, tephra-based), in the sub-Antarctic Atlantic (MD07-3076CQ, dark green, stratigraphic alignment between sea surface temperature (SST) and Antarctic temperature)5, and in the South Indian (MD12-3396CQ, light blue, stratigraphic alignment between (sub-)SST and Antarctic temperature). d14RP-Atm values for the Kerguelen Plateau adopted by ref. 16 are shown in dark red (for locations of cores see inset map), b benthic-to-planktic foraminiferal 14C age offsets (d14RB-P) in MD12-3396CQ, c 14C age offsets of benthic foraminifera in MD12-3396CQ from the contemporaneous atmosphere, d14RB-Atm, d Δ14Catm variations corrected for changes in cosmogenic 14C production3, and e atmospheric CO2 (CO2,atm) changes (black symbols)32 and EPICA Dome C (EDC) δD variations (grey)25,69. Grey lines in a and c show simulated d14RP-Atm changes at the study site (80–100°E, 45–50°S; Methods29) at 25 m and 3.5 km depth, respectively. Arrow in c indicates prebomb deep-ocean reservoir ages (1.3 14C kyr) at our study site (according to the the Global Ocean Data Analysis Project database, version 2)28. Lines and envelopes show 1 kyr-running averages and the 1σ-uncertainty/66%-probability range. Vertical bars indicate intervals of rising CO2,atm levels (darker bands highlight periods with centennial-scale CO2,atm increases32). HS1 Heinrich Stadial 1, ACR Antarctic Cold Reversal, BA Bølling Allerød, YD Younger Dryas.

Back to article page