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

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 resoluti...

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Bibliographic Details
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
Description
Summary: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 ...

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