(Table 3) Age determination of sediment core HLY02-02-51 ...

• Main Authors: Caissie, Beth, Brigham-Grette, Julie, Lawrence, Kira T, Herbert, Timothy D, Cook, Mea S
• Format: Dataset
• Language: English
• Published: PANGAEA 2010
• Subjects: DEPTH, sediment/rock; Age, dated; Age, dated standard deviation; Calendar age, maximum/old; Calendar age, minimum/young; Jumbo Piston Core; Age, 14C AMS; Age, 14C calibrated, CALIB 5.0.2 Stuiver et al., 2005; HLY0202; Healy; albedo; Bering Sea; Neogloboquadrina pachyderma; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.831621; https://doi.pangaea.de/10.1594/PANGAEA.831621

The Bering Sea gateway between the Pacific and Arctic oceans impacts global climate when glacial-interglacial shifts in shore line position and ice coverage change regional albedo. Previous work has shown that during the last glacial termination and into the Holocene, sea level rises and sea ice coverage diminishes from perennial to absent. Yet, existing work has not quantified sea ice duration or sea surface temperatures (SST) during this transition. Here we combine diatom assemblages with the first alkenone record from the Bering Sea to provide a semiquantitative record of sea ice duration, SST, and productivity change since the Last Glacial Maximum (LGM). During the LGM, diatom assemblages indicate that sea ice covered the southeastern Bering Sea perennially. At 15.1 cal ka B.P., the diatom assemblage shifts to one more characteristic of seasonal sea ice and alkenones occur in the sediments in low concentrations. Deglaciation is characterized by laminated intervals with highly productive and diverse ... : Measured on Neogloboquadrina pachyderma sinistral. ...