Sedimentary and carbonate preservation of ODP Sites 1262, 1263 and 1266 ...

• Main Authors: Kelly, Daniel Clay, Nielsen, Tina M J, McCarren, Heather K, Zachos, James C, Röhl, Ursula
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2010
• Subjects: Composite Core; Leg208; Joides Resolution; Ocean Drilling Program ODP; Ocean acidification; Weddell Sea
• Online Access: https://dx.doi.org/10.1594/pangaea.738505; https://doi.pangaea.de/10.1594/PANGAEA.738505

Rapid carbon input into the ocean-atmosphere system caused a dramatic shoaling of the lysocline during the Paleocene-Eocene thermal maximum (PETM), a transient (~170 kyr) global warming event that occurred roughly 55 Ma. Carbon cycle models invoking an accelerated carbonate-silicate feedback mechanism to neutralize ocean acidification predict that the lysocline would subsequently deepen to depths below its original position as the marine carbonate system recovered from such a perturbation. To test this hypothesis, records of carbonate sedimentation and preservation for PETM sections in the Weddell Sea (ODP Site 690) and along the Walvis Ridge depth transect (ODP Sites 1262, 1263, and 1266) were assembled within the context of a unified chronostratigraphy. The meridional gradient of undersaturation delimited by these records shows that dissolution was more severe in the subtropical South Atlantic than in the Weddell Sea during the PETM, a spatiotemporal pattern inconsistent with the view that Atlantic ... : Supplement to: Kelly, Daniel Clay; Nielsen, Tina M J; McCarren, Heather K; Zachos, James C; Röhl, Ursula (2010): Spatiotemporal patterns of carbonate sedimentation in the South Atlantic: Implications for carbon cycling during the Paleocene-Eocene thermal maximum. Palaeogeography, Palaeoclimatology, Palaeoecology, 293(1-2), 30-40 ...