TOC, TN, and sedimentary d15N and δ¹³C ratios of sediment core SO201-2-85 ...

• Main Authors: Riethdorf, Jan-Rainer, Thibodeau, Benoit, Ikehara, Minoru, Nürnberg, Dirk, Max, Lars, Tiedemann, Ralf, Yokoyama, Yusuke
• Format: Dataset
• Language: English
• Published: PANGAEA 2016
• Subjects: DEPTH, sediment/rock; AGE; Nitrogen, total; Carbon, organic, total; δ15N, organic matter; δ13C, organic matter; Comment; Piston corer; Element analyser isotope ratio mass spectrometer EA-IRMS; SO201/2; Sonne; Bering Sea
• Online Access: https://dx.doi.org/10.1594/pangaea.807383; https://doi.pangaea.de/10.1594/PANGAEA.807383

We present high-resolution records of sedimentary nitrogen (d15Nbulk) and carbon isotope ratios (d13Cbulk) from piston core SO201-2-85KL located in the western Bering Sea. The records reflect changes in surface nitrate utilization and terrestrial organic matter contribution in submillennial resolution that span the last 180 kyr. The d15Nbulk record is characterized by a minimum during the penultimate interglacial indicating low nitrate utilization (~62-80%) despite the relatively high export production inferred from opal concentrations along with a significant reduction in the terrestrial organic matter fraction (mterr). This suggests that the consumption of the nitrate pool at our site was incomplete and even more reduced than today (~84%). d15Nbulk increases from Marine Isotope Stage (MIS) 5.4 and culminates during the Last Glacial Maximum, which indicates that nitrate utilization in the Bering Sea was raised during cold intervals (MIS 5.4, 5.2, 4) and almost complete during MIS 3 and 2 (~93-100%). This is ... : Supplement to: Riethdorf, Jan-Rainer; Thibodeau, Benoit; Ikehara, Minoru; Nürnberg, Dirk; Max, Lars; Tiedemann, Ralf; Yokoyama, Yusuke (2016): Surface nitrate utilization in the Bering sea since 180kA BP: Insight from sedimentary nitrogen isotopes. Deep Sea Research Part II: Topical Studies in Oceanography, 125-126, 163-176 ...