Dataset: Cocos Ridge C14 Data

Name: Radiocarbon (C14) calendar ages measured on pelagic foraminifera species collected from sediment cores from the Cocos Ridge (Eastern Equatorial Pacific) acquired during cruise SR2113 between November - December 2021.
Published: 2024-04-17
Keywords: carbonate, Dissolution, porewater, saturation, radiocarbon, pelagic foraminifera, C14, oceans

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Cite This Dataset

Spatial Extent: N:6.78487 E:-86.59988 S:5.35008 W:-88.26095

Temporal Extent: 2021-12-01 - 2021-12-14

Project:

Collaborative Research: New approaches to study calcium carbonate dissolution on the sea floor and its impact on paleo-proxy interpretations (CDISP 2021)

Co-Principal Investigator:

Jess F. Adkins (California Institute of Technology, Caltech)

William M. Berelson (University of Southern California, USC)

Scientist:

Frank J. Pavia (California Institute of Technology, Caltech)

Patrick Rafter (University of California-Irvine, UC Irvine)

Student:

Jaclyn Elise Pittman Cetiner (University of Southern California, USC)

Matthew Quinan (University of Southern California, USC)

Contact:

Jaclyn Elise Pittman Cetiner (University of Southern California, USC)

BCO-DMO Data Manager:

Karen Soenen (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2024-04-17

Restricted:

Validated:

Current State:

Data not available

Radiocarbon (C14) calendar ages measured on pelagic foraminifera species collected from sediment cores from the Cocos Ridge (Eastern Equatorial Pacific) acquired during cruise SR2113 between November - December 2021.

Abstract:

These data include radiocarbon (C14) calendar ages measured on pelagic foraminifera species collected from sediment cores from the Cocos Ridge in the Eastern Equatorial Pacific. This cruise was aboard the R/V Sally Ride between 2021-11-20 and 2021-12-20. Instruments used were a multicorer and accelerator mass spectrometry . These data contributed to our understanding of the carbonate chemistry system in this region, particularly regarding carbonate dissolution in deep-sea sediments. Patrick Rafter (UC Irvine) measured C14 calendar ages.

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Methods & Sampling

The sediment cores are taken from the Cocos Ridge in the Eastern Equatorial Pacific using a multicorer at 4 different locations. This cruise was aboard the R/V Sally Ride between 2021-11-20 and 2021-12-20.

Data Processing Description

Radiocarbon values were measured by accelerator mass spectrometry (AMS) at the University of California, Irvine Keck Carbon Cycle Accelerator Mass Spectrometry (KCCAMS) laboratory. The sediment was dried and washed over a 63 μm sieve with DI water, where pelagic forams were selected from the >250 μm fraction at different sediment horizons. Forams were leached with 10% HCl to remove any post-depositional carbonate and hydrolyzed under vacuum using H3PO4. The CO2 released from this hydrolysis was then graphitized and the 14C/C of this CO2 was counted on the AMS. The average percent error of calendar ages using this method was 1.5% for 23 foram measurements.

BCO-DMO Processing

* Scientific names in the data were checked using World Register of Marine Species (WoRMS) Taxon Match. Scientific names were corrected after working with the data contributor. All scientific names in the data are valid and accepted names as of 2024-04-18
* Added sample acquisition description (approved by submitter).

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1834475

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
SR2113	CDISP	2021-11-20	R/V Sally Ride	Jess F. Adkins (Co-Chief Scientist) William M. Berelson (Co-Chief Scientist)	data info

Instruments

Accelerator Mass Spectrometer

Supplied Name:

Supplied Description:

Accelerator mass spectrometer was used to measure 14C/C

Instrument Type

Generic Name: Accelerator Mass Spectrometer

Acronym: AMS

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB17/

Generic Description:

An AMS measures "long-lived radionuclides that occur naturally in our environment. AMS uses a particle accelerator in conjunction with ion sources, large magnets, and detectors to separate out interferences and count single atoms in the presence of 1x1015 (a thousand million million) stable atoms, measuring the mass-to-charge ratio of the products of sample molecule disassociation, atom ionization and ion acceleration." AMS permits ultra low-level measurement of compound concentrations and isotope ratios that traditional alpha-spectrometry cannot provide. More from Purdue University: http://www.physics.purdue.edu/primelab/introduction/ams.html

Multi Corer

Supplied Name: Ocean Instruments MC 800 Multicolor

Supplied Description:

Instrument Type

Generic Name: Multi Corer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/51/

Generic Description:

The Multi Corer is a benthic coring device used to collect multiple, simultaneous, undisturbed sediment/water samples from the seafloor. Multiple coring tubes with varying sampling capacity depending on tube dimensions are mounted in a frame designed to sample the deep ocean seafloor. For more information, see Barnett et al. (1984) in Oceanologica Acta, 7, pp. 399-408.

Parameters

Date and time formats are described in python strftime() syntax.

Supplied Name	Supplied description	Supplied Units	Standard Name
Station	Station ID number	unitless	station
Date	Date of porewater sampler/multi-corer deployment in mm_dd_yyyy Format: %Y-%m-%d	unitless	date
Latitude	Station latitude, south is negative	decimal degrees	lat
Longitude	Station longitude, west is negative	decimal degrees	lon
Water_Column_Depth	Water column depth	meters (m)	depth
Sediment_Depth	Sediment depth relative to sediment-water interface	centimeters (cm)	depth_core
Foram_sp	Foraminifera species	unitless	species
AphiaID	ID in the World Register of Marine Species that pairs to the scientificName	unitless	taxon_code
C14_age	Carbon 14 calendar age	year (yr)	14C

Database

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Dataset: Cocos Ridge C14 Data