Dataset: Gulf of Mexico sediment core oxygen profiles

Name: Oxygen profiles from sediment core samples collected in the northern Gulf of Mexico, May 2017
Published: 2018-10-15
Keywords: oceans

Cite This Dataset

DOI:10.1575/1912/bco-dmo.745997.1

Spatial Extent: N:29.907 E:-84.456 S:29.853 W:-84.552

Temporal Extent: 2017-07-11 - 2017-07-20

Project:

Toward an Improved Understanding of Blue Carbon: The Role of Seagrasses in Sequestering CO2 (Seagrass Blue Carbon)

Principal Investigator:

David J. Burdige (Old Dominion University, ODU)

Co-Principal Investigator:

Matthew H. Long (Woods Hole Oceanographic Institution, WHOI)

Richard C. Zimmerman (Old Dominion University, ODU)

BCO-DMO Data Manager:

Nancy Copley (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2018-10-15

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Oxygen profiles from sediment core samples collected in the northern Gulf of Mexico, May 2017

Abstract:

This dataset includes oxygen profiles from sediment core samples collected in the northern Gulf of Mexico in May 2017.

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Archival Copy

Version Date	Archive	Persistent Identifier	Date Assigned
2018-10-15	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.1575/1912/bco-dmo.745997.1	2019-03-20

Description

This dataset includes oxygen profiles from sediment core samples collected in the northern Gulf of Mexico in May 2017.

Methods & Sampling

Sediment cores were collected by divers, sealed in the field with rubber stoppers and returned to the lab for processing. Pore waters were collected by inserting rhizon samplers (Seeberg-Elverfeldt et al., 2005) through pre-drilled holes in the core tubes. Samples were collected in gas-tight glass syringes and filtered through 0.45 µm nylon filters into storage vials. Oxygen profiles in the cores were collected with polarographic microelectrodes (Luther et al., 2008) using a DLK 70 WebPstat electrochemical analyzer (AIS, Inc.) and a computer-controlled micro-profiler.

Note: 'sd' in this dataset means that the electrode signal deterioriated, likely due to sulfide interference.

Data Processing Description

BCO-DMO Processing Notes:
- added conventional header with dataset name, PI name, version date
- modified parameter names to conform with BCO-DMO naming conventions
- added columns for site, lat, and lon
- reformatted collection date and time from m/d/yyyy H:MM to YYYY-MM-DDTHH:MM:SS (ISO 8601:2004E)-
- transformed table to flat format by reproducing rows core, profile, datetime_collected and scanned to columns for each depth/O2 record
- re-ordered records by site name
- changed Spidercrab Bay core id's from SC* to SP*

Data Files

File
GOM_2017_O2_profiles.csv (Comma Separated Values (.csv), 24.84 KB) MD5:fa7ab107cde0cd29a1f4a194983e0760 Primary data file for dataset ID 745997

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1633951
NSF Division of Ocean Sciences	OCE-1635403

Deployments

None available yet

Instruments

Oxygen Microelectrode Sensor

Supplied Name: DLK 70 WebPstat electrochemical analyzer (AIS, Inc.)

Supplied Description:

Oxygen was measured with polarographic microelectrodes using a DLK 70 WebPstat electrochemical analyzer (AIS, Inc.) and a computer-controlled micro-profiler.

Instrument Type

Generic Name: Oxygen Microelectrode Sensor

Acronym: O2 Microelectrode

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/351/

Generic Description:

Any microelectrode sensor that measures oxygen.

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
site	sample collection site identifier	unitless	site
lat	latitude; north is positive	decimal degrees	lat
lon	longitude; east is positive	decimal degrees	lon
core	core number	unitless	core_id
profile	profile replicate identifier	unitless	replicate
ISO_DateTime_Local_collected	local date and time sample was collected; formatted as YYYY-MM-DDTHH:MM:SS (ISO 8601:2004€ )	unitless	date_local
ISO_DateTime_Local_scan	local date and time when oxygen profiling began; formatted as YYYY-MM-DDTHH:MM:SS (ISO 8601:2004€ )	unitless	date_local
depth_cm	depth of oxygen reading within the core sample; bottom water refers to scan collected approximately 0.5 cm above the sediment surface	centimeters	depth_core
O2_uM	dissolved oxygen concentration	microMoles	O2