Dataset: Organic carbon content
Deployment: KNOX02RR

Principal Investigator:

Emily Estes (Texas A&M University, TAMU)

Co-Principal Investigator:

Colleen Hansel (Woods Hole Oceanographic Institution, WHOI)

BCO-DMO Data Manager:

Amber D. York (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

Elucidating the extent and composition of mineral-hosted carbon in the deep biosphere (Org C Sed I)

Geochemical controls on organic carbon quantity and quality in the deep subsurface (Org C Sed II)

Deployment Synonyms:

SPG, South Pacific Gyre, Knox02-RR

Data URL:

https://www.bco-dmo.org/dataset-deployment/782741/data

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Description

Organic carbon, d13C, and total nitrogen content of pelagic sediment from the North Atlantic gyre, South Pacific gyre, and Peru Basin from cruises KN223 (R/V Knorr), KNOX02RR (R/V Roger Revelle), and ODP leg 201 between 2002 and 2013. Sediment samples were taken with gravity corers, multi corers, piston and advanced piston corers (APC).

These data were published in Estes et al. (2019) as Figure 1.

Methods & Sampling

Dataset acquisition description

Sediment samples were stored at 4°C prior to analysis. Organic carbon, total nitrogen, and d13C were analyzed via element-analyzer isotope ratio mass spectrometry. Prior to analysis, samples were freeze-dried and acidified to remove carbonate.

Instrument: Carlo Erba Elemental Analyzer Model 1108 and Finnegan-MAT DeltaPlus isotope ratio monitoring mass spectrometer. The instrument was calibrated and data drift-corrected with USGS-40 (L-glutamic acid) reference material and an in-house glycine standard.

See Estes el al. 2019, for complete methods.

Data Processing Description

Dataset Processing Description

Data was drift corrected and normalized to sample mass in Excel.

BCO-DMO Data Manager Processing Notes:
* exported data in xlsx file "Estes CN data.xlsx" to csv file
* added a conventional header with dataset name, PI name, version date
* modified parameter names to conform with BCO-DMO naming conventions
* blank values in this dataset are displayed as "nd" for "no data." nd is the default missing data identifier in the BCO-DMO system.
* latitude and longitude in degrees decimal minutes converted to decimal degrees
* date format converted to ISO 8601 format yyyy-mm-dd

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-0939564	NSF Division of Ocean Sciences

Instruments

Advanced Piston Corer

Supplied Name:

Supplied Description:

Instrument Type

Generic Name: Advanced Piston Corer

Acronym: APC

Generic Description:

The JOIDES Resolution's Advanced Piston Corer (APC) is used in soft ooze and sediments. The APC is a hydraulically actuated piston corer designed to recover relatively undisturbed samples from very soft to firm sediments.

More information is available from IODP (PDF).

Elemental Analyzer

Supplied Name: Carlo Erba Elemental Analyzer Model 1108

Supplied Description:

Carlo Erba Elemental Analyzer Model 1108 and Finnegan-MAT DeltaPlus isotope ratio monitoring mass spectrometer. The instrument was calibrated and data drift-corrected with USGS-40 (L-glutamic acid) reference material and an in-house glycine standard.

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.

Gravity Corer

Supplied Name:

Supplied Description:

Instrument Type

Generic Name: Gravity Corer

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

Generic Description:

The gravity corer allows researchers to sample sediment layers at the bottom of lakes or oceans. The coring device is deployed from the ship and gravity carries it to the seafloor. (http://www.whoi.edu/instruments/viewInstrument.do?id=1079).

Mass Spectrometer

Supplied Name: Finnegan-MAT DeltaPlus isotope ratio monitoring mass spectrometer

Supplied Description:

Instrument Type

Generic Name: Mass Spectrometer

Acronym: Mass Spec

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB16/

Generic Description:

General term for instruments used to measure the mass-to-charge ratio of ions; generally used to find the composition of a sample by generating a mass spectrum representing the masses of sample components.

Multi Corer

Supplied Name:

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.

Piston Corer

Supplied Name:

Supplied Description:

Instrument Type

Generic Name: Piston Corer

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

Generic Description:

The piston corer is a type of bottom sediment sampling device. A long, heavy tube is plunged into the seafloor to extract samples of mud sediment. A piston corer uses a "free fall" of the coring rig to achieve a greater initial force on impact than gravity coring. A sliding piston inside the core barrel reduces inside wall friction with the sediment and helps to evacuate displaced water from the top of the corer. A piston corer is capable of extracting core samples up to 90 feet in length.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
location	Sample origin	unitless	site
expedition	Cruise name	unitless	cruise_id
site	Site number	unitless	site
latitude	Latitude	decimal degrees	lat
longitude	Longitude	decimal degrees	lon
water_depth	Water depth	meters (m)	depth
core_type	Coring device used	unitless	sample_type
depth	Sample depth (meters below seafloor)	meters (m)	mbsf
per_OC	Organic carbon. % (g OC/g sed)	percent (%)	C_org
per_N	Total nitrogen content. % (g N/g sed)	percent (%)	N
date	date sample collection in ISO 8601 format yyyy-mm-dd	unitless	date
d13C	Delta 13C (d13C). The ratio of stable isotopes 13C:12C	per mil (0/00)	d13C

Database

Contribute Data

Dataset: Organic carbon content
Deployment: KNOX02RR

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: Organic carbon contentDeployment: KNOX02RR

Dataset acquisition description

Dataset Processing Description

Dataset: Organic carbon content
Deployment: KNOX02RR