Dataset: Mud Patch porewater chemistry

Name: Carbonate chemistry from Mud Patch porewater, from R/V Endeavor EN524 in the continental shelf off New England; 40.43 N 70.5 W from May 2013 (OA, Hypoxia and Warming project)
Published: 2016-12-16
Keywords: oceans

Cite This Dataset

Spatial Extent: N:40.438 E:-70.4969 S:40.438 W:-70.4969

Project:

Ocean Acidification, Hypoxia and Warming: Experimental Investigations into Compounded Effects of Global Change on Benthic Foraminifera (OA, Hypoxia and Warming)

Program:

Science, Engineering and Education for Sustainability NSF-Wide Investment (SEES): Ocean Acidification (formerly CRI-OA) (SEES-OA)

Principal Investigator:

Joan M. Bernhard (Woods Hole Oceanographic Institution, WHOI)

BCO-DMO Data Manager:

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

Version Date:

2016-12-16

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Carbonate chemistry from Mud Patch porewater, from R/V Endeavor EN524 in the continental shelf off New England; 40.43 N 70.5 W from May 2013 (OA, Hypoxia and Warming project)

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Description

This dataset includes porewater DIC and alkalinity, with additional carbonate calculations, from R/V Endeavor EN524 in the Mud Patch site, continental shelf off New England; 40.43 N 70.5 W from May 2013.

Methods & Sampling

An MC800 sediment core from event 10 was sectioned into 1-cm slices to 2 cm. Each interval was centrifuged and the supernatant (porewater) was filtered through a 0.45 um filter, and preserved with mercuric chloride. Alkalinity was determined using Gran titrations of 1 ml samples. DIC was determined manometrically on ~5-ml samples using an automated vacuum extraction system.

All other carbonate system parameters were calculated via using CO2SYS (Lewis & Wallace 1998) and the dissociation constants of Mehrbach et al. (1973) as refit by Dickson & Millero (1987), and the calcite solubility of Mucci (1983).

Related Reference: JC Wit, MM Davis, DC Mccorkle, JM Bernhard, A short-term survival experiment assessing impacts of ocean acidification and hypoxia on the benthic foraminifer Globobulimina turgida (2016) Journal of Foraminiferal Research, 46: 25-33. https://doi.org/10.2113/gsjfr.46.1.25

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
- replaced spaces with underscores
- added yrday_utc and ISO_DateTime_UTC, calculated from date and time

Data Files

File
porewater_DIC_alk.csv (Comma Separated Values (.csv), 340 bytes) MD5:276b5ac854ca59e0c30ac3e1df7595eb Primary data file for dataset ID 670536

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1219948

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
EN524		2013-05-19	R/V Endeavor	Joan M. Bernhard (Chief Scientist)	data info

Instruments

Centrifuge

Supplied Name: centrifuge

Supplied Description:

Used to extract porewater from core

Instrument Type

Generic Name: Centrifuge

Generic Description:

A machine with a rapidly rotating container that applies centrifugal force to its contents, typically to separate fluids of different densities (e.g., cream from milk) or liquids from solids.

Multi Corer

Supplied Name: MC800 sediment core

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
sample	sample identifier	unitless	sample
event	event number	unitless	event
lat	latitude; north is positive	decimal degrees	lat
lon	longitude; east is positive	decimal degrees	lon
date	date formatted as yyyy-mm-dd	unitless	date
time	UTC time formatted as HH:MM	unitless	time
yrday_utc	UTC day and decimal time:eg. 326.5 for the 326th day of the year or November 22 at 1200 hours (noon)	julian day and fraction of day	yrday_utc
ISO_DateTime_UTC	Date/Time (UTC) ISO formatted based on ISO 8601:2004(E) with format YYYY-mm-ddTHH:MM:SS[.xx]Z	year;month;day;hour;minute;second	ISO_DateTime_UTC
depth_w	depth of water	meters	depth_w
DIC	dissolved inorganic carbon	micromole/kilogram (umol/kg)	DIC
alkalinity	total alkalinity	micromole/kilogram (umol/kg)	TALK
pCO2	partial pressure of carbon dioxide computation from pH and alkalinity	ppmv	pCO2
carbonate	concentration of carbonate ion ([CO3]2-) in seawater	micromole/kilogram seawater (umol/kg)	carbonate
Om_calcite	The saturation state of seawater with respect to calcite	dimensionless	OM_ca
pH	pH: The measure of the acidity or basicity of an aqueous solution	dimensionless	pH

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Dataset: Mud Patch porewater chemistry