Less Remineralized Carbon in the Intermediate-Depth South Atlantic During Heinrich Stadial 1
Lacerra, Matthew; Lund, David; Gebbie, G; Oppo, D. W.; Yu, Jimin; Schmittner, Andreas; Umling, N. E.
The last deglaciation (~20–10 kyr BP) was characterized by a major shift in Earth's climate state, when the global mean surface temperature rose ~4 °C and the concentration of atmospheric CO2 increased ~80 ppmv. Model simulations suggest that the initial 30 ppmv rise in atmospheric CO2 may have been driven by reduced efficiency of the biological pump or enhanced upwelling of carbon‐rich waters from the abyssal ocean. Here we evaluate these hypotheses using benthic foraminiferal B/Ca (a...[Show more]
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|Source:||Paleoceanography and Paleoclimatology|
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