Surface and permanent pycnocline temperatures and seawater δ¹⁸O based on paired Mg/Ca-d18O, and abundances of Neogloboquadrina atlantica from ~2.8-2.4 Ma at IODP Site U1313 in the mid-latitude North Atlantic ...

The North Atlantic Current (NAC) transports warm salty water to high northern latitudes, with important repercussions for ocean circulation and global climate. A southward displacement of the NAC and Subarctic Front, which separate subpolar and subtropical water masses, is widely suggested for the l...

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Bibliographic Details
Main Authors: Bolton, Clara T, Bailey, Ian, Friedrich, Oliver, Tachikawa, Kazuyo, de Garidel-Thoron, Thibault, Vidal, Laurence, Sonzogni, Corinne, Marino, Gianluca, Rohling, Eelco J, Robinson, Marci M, Ermini, Magali, Koch, Mirjam C, Cooper, Matthew J, Wilson, Paul A
Format: Article in Journal/Newspaper
Language:English
Published: PANGAEA 2018
Subjects:
Integrated Ocean Drilling Program / International Ocean Discovery Program IODP
north atlantic current
North Atlantic
Subarctic
Online Access:https://dx.doi.org/10.1594/pangaea.892805
https://doi.pangaea.de/10.1594/PANGAEA.892805
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Summary:The North Atlantic Current (NAC) transports warm salty water to high northern latitudes, with important repercussions for ocean circulation and global climate. A southward displacement of the NAC and Subarctic Front, which separate subpolar and subtropical water masses, is widely suggested for the last glacial maximum (LGM) and may have acted as a positive feedback in glacial expansion at this time. However, the role of the NAC during the intensification of northern hemisphere glaciation (iNHG) ~3.5 to 2.5 Ma, is less clear. Here, we present new records from IODP Site U1313 (41°N) spanning ~2.8-2.4 Ma to trace the influence of Subarctic Front waters above this mid-latitude site. We reconstruct surface and permanent pycnocline temperatures and seawater δ18O using paired Mg/Ca-δ18O measurements on the planktic foraminifers Globigerinoides ruber and Globorotalia crassaformis, and determine abundances of the subpolar foraminifer Neogloboquadrina atlantica. We find that the first significant glacial incursions of ... : Supplement to: Bolton, Clara T; Bailey, Ian; Friedrich, Oliver; Tachikawa, Kazuyo; de Garidel-Thoron, Thibault; Vidal, Laurence; Sonzogni, Corinne; Marino, Gianluca; Rohling, Eelco J; Robinson, Marci M; Ermini, Magali; Koch, Mirjam C; Cooper, Matthew J; Wilson, Paul A (2018): North Atlantic Midlatitude Surface‐Circulation Changes Through the Plio‐Pleistocene Intensification of Northern Hemisphere Glaciation. Paleoceanography and Paleoclimatology, 33(11), 1186-1205 ...

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