Dataset: Mud Patch porewater chemistry
Deployment: EN524

Porewater carbonate chemistry from Mud Patch, EN524

Principal Investigator:

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

BCO-DMO Data Manager:

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

Project:

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

Version Date:

2016-12-16

Data URL:

https://www.bco-dmo.org/dataset-deployment/670541/data

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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

Dataset acquisition description

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

Dataset 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

More information about this dataset deployment

Funding

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

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

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

Database

Contribute Data

Dataset: Mud Patch porewater chemistry
Deployment: EN524

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: Mud Patch porewater chemistryDeployment: EN524

Dataset acquisition description

Dataset Processing Description

Dataset: Mud Patch porewater chemistry
Deployment: EN524