Dataset: Cocos Ridge Solid Phase Data

Name: Solid phase measurements of sediment cores from the Cocos Ridge (Eastern Equatorial Pacific) acquired during cruise SR2113 between November - December 2021.
Published: 2024-06-20
Keywords: carbonate, Dissolution, porewater, saturation, porosity, particulate inorganic carbon, particulate organic carbon, oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.925132.1

Spatial Extent: N:6.78487 E:-86.5999 S:5.35008 W:-88.2609

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:

Sijia Dong (California Institute of Technology, Caltech)

Student:

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

Contact:

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

Technician:

Nick E. Rollins (University of Southern California, USC)

BCO-DMO Data Manager:

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

Version:

Version Date:

2024-06-20

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Solid phase measurements of sediment cores from the Cocos Ridge (Eastern Equatorial Pacific) acquired during cruise SR2113 between November - December 2021.

Abstract:

These data include solid phase measurements on 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, Liaison autosampler coupled to a Picarro cavity ring-down spectrometer, and Element Analyzer coupled to a Picarro cavity ring-down spectrometer. These data contributed to our understanding of the carbonate chemistry system in this region, particularly regarding carbonate dissolution in deep-sea sediments. Sijia Dong (Caltech) and Nick Rollins (USC) measured CaCO3 (PIC) and Organic_C (POC).

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Archival Copy

Version Date	Archive	Persistent Identifier (PID)	Date PID Issued
2024-06-20	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.925132.1	2024-06-20

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

Porosity was obtained by mass of water loss upon drying and assigned a standard salinity (34.6 ppt) and sediment grain density (2.6 g/cm3). Bulk sediment samples were dried in an oven at 50°C for 72 h and then homogenized for TC and mineralogical analyses.

2-10 mg of the samples were used for PIC (% CaCO3) and delta 13C of PIC and analyzed on a Picarro Cavity Ring-Down Spectrometer (G2131-i) with Liaison autosampler, following acidification. TC and delta 13C of TC measurements were conducted using an Elemental Analyzer (EA, Costech) coupled to a Picarro Cavity Ring-Down Spectrometer (G2131-i).

Particulate Organic Carbon (POC) was calculated by subtracting PIC from TC. Uncertainties in PIC and TC concentrations were evaluated based on the average offset between duplicate sample measurements and were identified to be ± 0.04 % PIC (7 pairs of duplicates) and ± 0.03 % TC (5 pairs of duplicates). Uncertainty in delta 13C was evaluated based on the standard error of the measured optical calcite standard and was 0.02 ‰.

Mineralogy of the sediment was measured with a Bruker D8 Advance X-Ray Diffraction (XRD). Roughly 200 mg of each ground sediment sample was mounted onto a rotating disc and scanned for ~1 h. Data analysis was conducted using the software Jade.

BCO-DMO Processing

* Added sample acquisition description (approved by submitter)
* Adjusted parameter names to comply with database requirements

Data Files

File
925132_v1_solidphase.csv (Comma Separated Values (.csv), 4.24 KB) MD5:3c3c47cab66afdad40f0a41cf991cfb9 Primary data file for dataset ID 925132, version 1

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

Elemental Analyzer

Supplied Name: Elemental Analyzer (EA, Costech)

Supplied Description:

Elemental Analyzer (EA, Costech) coupled to a Picarro Cavity Ring-Down Spectrometer (G2131-i) was used to measure Total Carbon

Instrument Type

Generic Name: Elemental Analyzer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB01/

Generic Description:

Instruments that quantify carbon, nitrogen and sometimes other elements by combusting the sample at very high temperature and assaying the resulting gaseous oxides. Usually used for samples including organic material.

Laboratory Autosampler

Supplied Name: Liaison autosampler

Supplied Description:

A Picarro Cavity Ring-Down Spectrometer (G2131-i) coupled to a Liaison autosampler was used to measure PIC and delta13C of PIC.

Instrument Type

Generic Name: Laboratory Autosampler

Generic Description:

Laboratory apparatus that automatically introduces one or more samples with a predetermined volume or mass into an analytical instrument.

Multi Corer

Supplied Name: Ocean Instruments MC 800 Multicolor

Supplied Description:

Ocean Instruments MC 800 Multicolor was used to collect sediment cores.

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.

Spectrophotometer

Supplied Name: Picarro Cavity Ring-Down Spectrometer (G2131-i)

Supplied Description:

Elemental Analyzer (EA, Costech) coupled to a Picarro Cavity Ring-Down Spectrometer (G2131-i) was used to measure Total Carbon.

A Picarro Cavity Ring-Down Spectrometer (G2131-i) coupled to a Liaison autosampler was used to measure PIC and delta13C of PIC.

Instrument Type

Generic Name: Spectrophotometer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB20/

Generic Description:

An instrument used to measure the relative absorption of electromagnetic radiation of different wavelengths in the near infra-red, visible and ultraviolet wavebands by samples.

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 ISO format (yyyy-mm-dd) 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_w
Sediment_Depth	Sediment depth relative to sediment-water interface	centimeters (cm)	depth_core
Porosity	Porosity	percent (%)	porosity
CaCO3	CaCO3 (carbonate) content; Particulate Inorganic Carbon (PIC)	percent (%)	CaCO3
Organic_C	Organic carbon content; Particulate Organic Carbon (POC)	percent (%)	POC