Age determination of ODP Hole 145-887 ...

• Main Authors: Galbraith, Eric Douglas, Jaccard, Samuel L, Pedersen, Thomas F, Sigman, Daniel M, Haug, Gerald H, Cook, Mea S, Southon, John R, Francois, Roger
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2007
• Subjects: Composite Core; Leg145; Joides Resolution; Ocean Drilling Program ODP; Subarctic
• Online Access: https://dx.doi.org/10.1594/pangaea.769777; https://doi.pangaea.de/10.1594/PANGAEA.769777

Atmospheric carbon dioxide concentrations were significantly lower during glacial periods than during intervening interglacial periods, but the mechanisms responsible for this difference remain uncertain. Many recent explanations call on greater carbon storage in a poorly ventilated deep ocean during glacial periods (Trancois et al., 1997, doi:10.1038/40073; Toggweiler, 1999, doi:10.1029/1999PA900033; Stephens and Keeling, 2000, doi:10.1038/35004556; Marchitto et al., 2007, doi:10.1126/science.1138679; Sigman and Boyle, 2000, doi:10.1038/35038000), but direct evidence regarding the ventilation and respired carbon content of the glacial deep ocean is sparse and often equivocal (Broecker et al., 2004, doi:10.1126/science.1102293). Here we present sedimentary geochemical records from sites spanning the deep subarctic Pacific that -together with previously published results (Keigwin, 1998, doi:10.1029/98PA00874)- show that a poorly ventilated water mass containing a high concentration of respired carbon dioxide ... : Supplement to: Galbraith, Eric Douglas; Jaccard, Samuel L; Pedersen, Thomas F; Sigman, Daniel M; Haug, Gerald H; Cook, Mea S; Southon, John R; Francois, Roger (2007): Carbon dioxide release from the North Pacific abyss during the last deglaciation. Nature, 449(7164), 890-894 ...