Dataset: Guaymas Basin 2014 DIC

Name: Porewater DIC concentrations and d13C isotopic values from sediment cores collected on the Guaymas Basin Ridge flanks and the Sonora Margin from R/V El Puma in October 2014
Published: 2016-10-13
Keywords: oceans

Cite This Dataset

Spatial Extent: N:27.86855 E:-111.22955 S:27.20745 W:-111.87617

Project:

Characterizing subseafloor life and environments in the Guaymas Basin (C-DEBI Guaymas Subseafloor Life)

RAPID proposal: Site characterization cruise to document the active and extensive subsurface biosphere in the Guaymas Basin (RAPID Guaymas Basin)

Program:

Center for Dark Energy Biosphere Investigations (C-DEBI)

Principal Investigator:

Andreas Teske (University of North Carolina at Chapel Hill, UNC-Chapel Hill)

Co-Principal Investigator:

Ivano Aiello (Moss Landing Marine Laboratories, MLML)

Ana Christina Ravelo (University of California-Santa Cruz, UCSC)

Contact:

Andreas Teske (University of North Carolina at Chapel Hill, UNC-Chapel Hill)

BCO-DMO Data Manager:

Shannon Rauch (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

13 October 2016

Version Date:

2016-10-13

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Porewater DIC concentrations and d13C isotopic values from sediment cores collected on the Guaymas Basin Ridge flanks and the Sonora Margin from R/V El Puma in October 2014

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Description

Porewater DIC concentrations and d13C isotopic values from sediment cores P3, P6, P10, P11, P12 and P13, collected on the Guaymas Basin Ridge flanks and the Sonora Margin. Sediment cores were collected from R/V El Puma, the Pacific Coast research vessel of the Autonomous University of Mexico, leaving Guaymas on October 14, 2014, and heading to Mazatlan on October 27, 2014.

Methods & Sampling

2 ml porewater samples were filtered through 0.22 um filters to remove particles, and injected 30 ml serum vials that were closed with thick rubber stoppers. The samples were stored frozen at -20 C. DIC analysis was performed in the lab of J.P. Chanton (Florida State University); briefly, the samples were acidified with phosphoric acid, and measured by GC-IRMS as described (Chanton et al. 2012).

References:
Chanton, J.P., J. Cherrier, R.M. Wilson, J. Sarkodee-Adoo, S. Bosman, A. Mickle, and W.M. Graham. 2012. Radiocarbon evidence that carbon from the Deepwater Horizon spill entered the planktonic food web of the Gulf of Mexico. Environmental Research Letters 7, 045303. doi:10.1088/1748-9326/7/4/045303

Data Processing Description

BCO-DMO Processing:
- created a column for core number;
- added lat, lon, and depth for each core from the metadata form;
- modified parameter names to conform with BCO-DMO naming conventions.

Data Files

File
Guaymas_DIC2014.csv (Comma Separated Values (.csv), 2.67 KB) MD5:d275cf20a200db0bf826817df2f6547f Primary data file for dataset ID 661658

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1449604
NSF Division of Ocean Sciences	OCE-0939564

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
Guaymas_2014		2014-10-14	R/V El Puma	Andreas Teske (Principal Investigator)	data info

Instruments

Isotope-ratio Mass Spectrometer

Supplied Name: GC-IRMS

Supplied Description:

Samples for DIC analysis were acidified with phosphoric acid, and measured by GC-IRMS as described (Chanton et al. 2012).

Instrument Type

Generic Name: Isotope-ratio Mass Spectrometer

Acronym: IR Mass Spec; IRMS

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

Generic Description:

The Isotope-ratio Mass Spectrometer is a particular type of mass spectrometer used to measure the relative abundance of isotopes in a given sample (e.g. VG Prism II Isotope Ratio Mass-Spectrometer).

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
core	Core identifier	unitless	core_id
lat	Latitude of sampling location; postive = north	decimal degrees	lat
lon	Longitude of sampling location; negative = west	decimal degrees	lon
depth	Water depth at sampling location	meters	depth_w
core_sample	Identifier for the core sample	unitless	sample
actual_depth	Sample depth, within the core	centimeters (cm)	depth_core
DIC_mM	Dissolved inorganic carbon concentration	millimolar (mM)	DIC
DIC_d13C	DIC d13C signature	permille	d13C_DIC

Status message

Database

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Dataset: Guaymas Basin 2014 DIC