Age models of northern North Atlantic sediment cores ...

• Main Authors: Thornalley, David J R, Elderfield, Henry, McCave, I Nick
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2010
• Subjects: Greenland; Greenland ice core; Greenland Ice core Project; ice core; Iceland; Neogloboquadrina pachyderma; NGRIP; North Atlantic; North Greenland; North Greenland Ice Core Project
• Online Access: https://dx.doi.org/10.1594/pangaea.831630; https://doi.pangaea.de/10.1594/PANGAEA.831630

Benthic foraminiferal stable isotope records from four high-resolution sediment cores, forming a depth transect between 1237 m and 2303 m on the South Iceland Rise, have been used to reconstruct intermediate and deep water paleoceanographic changes in the northern North Atlantic during the last 21 ka (spanning Termination I and the Holocene). Typically, a sampling resolution of ~100 years is attained. Deglacial core chronologies are accurately tied to North Greenland Ice Core Project (NGRIP) ice core records through the correlation of tephra layers and changes in the percent abundance of Neogloboquadrina pachyderma (sinistral) with transitions in NGRIP. The evolution from the glacial mode of circulation to the present regime is punctuated by two periods with low benthic d13C and d18O values, which do not lie on glacial or Holocene water mass mixing lines. These periods correlate with the late Younger Dryas/Early Holocene (11.5-12.2 ka) and Heinrich Stadial 1 (14.7-16.8 ka) during which time freshwater input ... : Supplement to: Thornalley, David J R; Elderfield, Henry; McCave, I Nick (2010): Intermediate and deep water paleoceanography of the northern North Atlantic over the past 21,000 years. Paleoceanography, 25(1), PA1211 ...