Dataset: Atlantic sediment radiocarbon from mult-corer samples collected in the Amazon Delta and Sierra Leone Rise during R/V Endeavor cruises EN-480 and EN-481 in 2010

ValidatedFinal no updates expectedDOI: 10.26008/1912/bco-dmo.908387.1Version 1 (2023-09-14)Dataset Type:Cruise Results

Principal Investigator: Rainer Lohmann (University of Rhode Island)

Scientist, Student: Kari Ann St. Laurent (University of Rhode Island)

BCO-DMO Data Manager: Amber D. York (Woods Hole Oceanographic Institution)

Project: Concentrations and source assessment of black carbon across tropical Atlantic air and sediment (Tropical Atlantic Black Carbon)

Project: The Black Carbon Cycle: Budget and Fluxes of Black Carbon in South Atlantic Sediments (Black Carbon Cycle)

Abstract

These data include the sediment radiocarbon analysis for Amazon Delta and Sierra Leone Rise Sediments. These data were collected on multiple cruises in throughout the Atlantic; specifically, in the Amazon Delta (EN-480; July 2010) and Sierra Leone Rise (EN-481; August 2010). Sediments were collected using multi-corer and kept frozen until analysis. Radiocarbon was measured for the Amazon Delta and Sierra Leone Rise regions at the National Ocean Sciences-Accelerator Mass Spectrometry (NOSAMS) fa...

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Cite Dataset

Sediment samples were collected via a 4-barrel multi-corer (R/V Endeavor, segmented into 1-2 cm sections, dried in a drying oven (35°C) and homogenized via mortar and pestle. Sediments were decalcified using 10% hydrochloric acid. Black carbon was isolated using the chemothermal oxidation at 375°C method.

 

Radiocarbon data were analyzed at the National Ocean Sciences Accelerator Mass Spectrometry Facility (NOSAMS) at the Woods Hole Oceanic Institute using the “reconnaissance” method as described by Burke et al., 2010 and McIntyre et al., 2011. The blank-corrected fraction modern is also reported as described by Burke et al., 2010. The AMS is a commissioned continuous-flow AMS system.

 

Instruments: 

Both the total organic carbon  (~0.10 to 0.35 mgC) and black carbon (~0.15 to 0.80 mgC) samples were combusted into carbon dioxide using a modified elemental analyzer and then converted to graphite using a zinc reduction method before analysis on an Accelerator Mass Spectrometer.

LOCATION:
Amazon Delta (approximately: 4 N, 47 W; 2400-3500m); Sierra Leone Rise (approximately: 7 N, 20 W; 2800-3800m).

Related Datasets

IsRelatedTo
Dataset: Atlantic Sediment Black Carbon
Relationship Description: Datasets from the same cruises published as part of the same study “New insights on black carbon in pelagic Atlantic sediments.” published in St. Laurent, et al. (2023).
Lohmann, R., St. Laurent, K. A. (2023) Atlantic sediment black carbon, total organic carbon, and stable carbon ratio (13C) values from samples collected using a multi-corer and box corer from multiple cruises throughout the Atlantic between 1994 and 2010. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2023-09-14 doi:10.26008/1912/bco-dmo.908373.1
IsRelatedTo
Dataset: Atlantic Sediment Petrography
Relationship Description: Datasets from the same cruises published as part of the same study “New insights on black carbon in pelagic Atlantic sediments.” published in St. Laurent, et al. (2023).
Lohmann, R., St. Laurent, K. A. (2023) Atlantic sediment petrography analysis data from mult-corer samples collected in the Amazon Delta and Sierra Leone Rise during R/V Endeavor cruises EN-480 and EN-481 in 2010. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2023-10-02 doi:10.26008/1912/bco-dmo.908380.1
IsRelatedTo
Dataset: Atlantic Sediment PAH
Relationship Description: Datasets from the same cruises published as part of the same study “New insights on black carbon in pelagic Atlantic sediments.” published in St. Laurent, et al. (2023).
Lohmann, R., St. Laurent, K. A. (2023) Atlantic sediment polycyclic aromatic hydrocarbon (PAH) concentrations from samples collected using a multi-corer and box corer from multiple cruises throughout the Atlantic between 1994 and 2010. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2023-09-14 doi:10.26008/1912/bco-dmo.908357.1

Related Publications

Results
St.Laurent, K., Cantwell, M., & Lohmann, R. (2023). New insights on black carbon in pelagic Atlantic sediments. Marine Chemistry, 104312. https://doi.org/10.1016/j.marchem.2023.104312
Methods
Burke, A., Robinson, L. F., McNichol, A. P., Jenkins, W. J., Scanlon, K. M., & Gerlach, D. S. (2010). Reconnaissance dating: A new radiocarbon method applied to assessing the temporal distribution of Southern Ocean deep-sea corals. Deep Sea Research Part I: Oceanographic Research Papers, 57(11), 1510–1520. https://doi.org/10.1016/j.dsr.2010.07.010
Methods
McIntyre, C. P., Roberts, M. L., Burton, J. R., McNichol, A. P., Burke, A., Robinson, L. F., von Reden, K. F., & Jenkins, W. J. (2011). Rapid radiocarbon (14C) analysis of coral and carbonate samples using a continuous‐flow accelerator mass spectrometry (CFAMS) system. Paleoceanography, 26(4). Portico. https://doi.org/10.1029/2011pa002174

St. Laurent, K. A., Lohmann, R. (2023) Atlantic sediment radiocarbon from mult-corer samples collected in the Amazon Delta and Sierra Leone Rise during R/V Endeavor cruises EN-480 and EN-481 in 2010. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2023-09-14 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.908387.1 [access date]

Terms of Use

This dataset is licensed under Creative Commons Attribution 4.0.


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