Figure 2: Records and age control of core MD07-3088. | Nature Communications

Figure 2: Records and age control of core MD07-3088.

From: Carbon isotope records reveal precise timing of enhanced Southern Ocean upwelling during the last deglaciation

Figure 2

(a) δ18O (per mil versus PDB) of G. bulloides. Smoothed curve using a three-point average (thick red line). (b) Summer Sea Surface Temperature (°C) using Modern Analogue Technique. (c) 14C age difference between paired benthic and planktic foraminifera (14C B-P; filled squares). The error bars represent combined error at 1. Red dash: modern B-P 14C age24. Double-ended arrow indicates stratified (higher 14C B-P and Δδ13C values) versus mixed (lower 14C B-P and Δδ13C values) water mass. (d) Δδ13C=δ13C G. bulloides—δ13C C. wuellerstörfii (red dots). Smoothed curve using a three-point average (thick red line). (e) Rsurf age (squares) and assumed Rsurf (dotted line) in core MD07-3088. HW7, H2, HW3, HW2, HW1: terrestrial tephra from the Hudson volcano (Supplementary Table S1). The error bars represent combined error at 1σ. (f) Calibrated 14C ages (ka BP) versus depth with 1σ uncertainties. OCR: Ocean Cold Reversal. W1 and W2 (yellow shading): the two Southern Ocean warming phases of the last deglaciation.

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