Radiocarbon ages and stable isotope measurements on sediment cores of the subarctic Pacific and its marginal seas ...

• Main Authors: Max, Lars, Lembke-Jene, Lester, Riethdorf, Jan-Rainer, Tiedemann, Ralf, Nürnberg, Dirk, Kühn, Hartmut, Mackensen, Andreas
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2014
• Subjects: Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo; Bering Sea; okhotsk sea; Subarctic
• Online Access: https://dx.doi.org/10.1594/pangaea.830222; https://doi.pangaea.de/10.1594/PANGAEA.830222

Under modern conditions only North Pacific Intermediate Water is formed in the northwest Pacific Ocean. This situation might have changed in the past. Recent studies with general circulation models indicate a switch to deep-water formation in the northwest Pacific during Heinrich Stadial 1 (17.5-15.0 ka) of the last glacial termination. Reconstructions of past ventilation changes based on paleoceanographic proxy records are still insufficient to test whether a deglacial mode of deep-water formation in the North Pacific Ocean existed. Here we present deglacial ventilation records based on radiocarbon-derived ventilation ages in combination with epibenthic stable carbon isotopes from the northwest Pacific including the Okhotsk Sea and Bering Sea, the two potential source regions for past North Pacific ventilation changes. Evidence for most rigorous ventilation of the intermediate-depth North Pacific occurred during Heinrich Stadial 1 and the Younger Dryas, simultaneous to significant reductions in Atlantic ... : Supplement to: Max, Lars; Lembke-Jene, Lester; Riethdorf, Jan-Rainer; Tiedemann, Ralf; Nürnberg, Dirk; Kühn, Hartmut; Mackensen, Andreas (2014): Pulses of enhanced North Pacific Intermediate Water ventilation from the Okhotsk Sea and Bering Sea during the last deglaciation. Climate of the Past, 10(2), 419-605 ...