Dataset: Mud Patch bottom water chemistry
Deployment: EN524

Bottom water 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:

Version Date:

2016-12-15

Data URL:

https://www.bco-dmo.org/dataset-deployment/670393/data

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Description

This dataset includes bottom-water 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

Bottom waters were obtained via CTD-Niskin rosette deployment to within ~5 m of the bottom. Triplicate samples were analyzed for DIC and alkalinity from each of 3 deployments. 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
- reduced significant digits to right of decimal point from 11 to 2 for DIC, ALK and carbonate
- 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

Niskin bottle

Supplied Name:

Supplied Description:

Instrument Type

Generic Name: Niskin bottle

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0412/

Generic Description:

A Niskin bottle (a next generation water sampler based on the Nansen bottle) is a cylindrical, non-metallic water collection device with stoppers at both ends. The bottles can be attached individually on a hydrowire or deployed in 12, 24, or 36 bottle Rosette systems mounted on a frame and combined with a CTD. Niskin bottles are used to collect discrete water samples for a range of measurements including pigments, nutrients, plankton, etc.

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
bicarbonate	concentration of bicarbonate ion ([HCO3]-)	micromole/kilogram seawater (umol/kg)	bicarbonate
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 bottom water chemistry
Deployment: EN524

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: Mud Patch bottom water chemistryDeployment: EN524

Dataset acquisition description

Dataset Processing Description

Dataset: Mud Patch bottom water chemistry
Deployment: EN524