Fig. 2: Down-core G. affinis and Uvigerina sp. Mg/Ca results, compared with the Greenland and Antarctic ice-core event stratigraphies. | Communications Earth & Environment

Fig. 2: Down-core G. affinis and Uvigerina sp. Mg/Ca results, compared with the Greenland and Antarctic ice-core event stratigraphies.

From: Southern Ocean convection amplified past Antarctic warming and atmospheric CO2 rise during Heinrich Stadial 4

Fig. 2

a Polar planktonic foraminifer, N. pachyderma (left coiling) abundance (black solid line and open circles, Nps %), compared with the EDML Antarctic ice-core temperature proxy, δ18Oice (blue line)4, and with deep-water temperature variability estimated from combined Mg/Ca measurements from two benthic foraminifer species (open red circles, with cubic spline and 95% confidence intervals, based on 0.6 °C 1 sigma uncertainty, are indicated by the solid and dashed red lines respectively; note inverted y axis). b benthic Mg/Ca measurements (G. affinis, solid black circles and spline; Uvigerina sp., crossed red circles and spline; error bars represent 2% analytical reproducibility), compared with the Greenland ice-core temperature proxy δ18Oice (light blue line, with dark blue running mean)51. Vertical shaded bar indicates the approximate timing of Heinrich Stadial 4 (HS4).

Back to article page