Estimates of %NCW bathing deep North Atlantic (IODP Site 306-U1313) over the past ~3.3 Ma ...

• Main Authors: Lang, David C, Bailey, Ian, Wilson, Paul A, Chalk, Thomas B, Foster, Gavin L, Gutjahr, Marcus
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2016
• Subjects: Integrated Ocean Drilling Program / International Ocean Discovery Program IODP; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.860974; https://doi.pangaea.de/10.1594/PANGAEA.860974

The circulation and internal structure of the oceans exert a strong influence on Earth's climate because they control latitudinal heat transport and the segregation of carbon between the atmosphere and the abyss (Sigman et al., 2010, doi:10.1038/nature09149). Circulation change, particularly in the Atlantic Ocean, is widely suggested (Bartoli et al., 2005, doi:10.1016/j.epsl.2005.06.020; Haug and Tiedemann, 1998, doi:10.1038/31447; Woodard et al., 2014, doi:10.1126/science.1255586; McKay et al., 2012, doi:10.1073/pnas.1112248109) to have been instrumental in the intensification of Northern Hemisphere glaciation when large ice sheets first developed on North America and Eurasia during the late Pliocene, approximately 2.7 million years ago (Bailey et al., 2013, doi:10.1016/j.quascirev.2013.06.004). Yet the mechanistic link and cause/effect relationship between ocean circulation and glaciation are debated. Here we present new records of North Atlantic Ocean structure using the carbon and neodymium isotopic ... : Estimates (and their 95% confidence intervals) of the precentage of northern component water (%NCW) bathing the deep North Atlantic (at IODP Site U1313, ~3400 m water depth) during: (1) the late Pliocene and earliest Pleistocene intensification of northern hemisphere glaciation, ~2.4 to 3.3 Ma (derived from the Nd isotope composition of fish debris; shown in Figure 2h of Lang et al., 2016) and ~0.013 to 3.3 Ma (derived from the carbon isotope composition of epibenthic foraminiferal calcite; shown in Figure 1b in Lang et al., 2016). See Lang et al. (2016) for the exact methods. ...