Dataset: phase1_elevated_pCO2

Name: Calcium carbonate dissolution experiment Phase 1: Effect of elevated pCO2 on sediment dissolution.
Published: 2018-05-11
Keywords: oceans

Cite This Dataset

Project:

Collaborative Research: Ocean Acidification and Coral Reefs: Scale Dependence and Adaptive Capacity (OA coral adaptation)

Program:

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

Principal Investigator:

Robert Carpenter (California State University Northridge, CSUN)

Co-Principal Investigator:

Peter J. Edmunds (California State University Northridge, CSUN)

Contact:

Coulson Lantz (California State University Northridge, CSUN)

BCO-DMO Data Manager:

Megan Switzer (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2018-05-11

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Calcium carbonate dissolution experiment Phase 1: Effect of elevated pCO2 on sediment dissolution.

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Description

Effect of elevated pCO2 on sediment dissolution. Data are results of Phase 1 of the sediment dissolution experiment described in:

Lantz, C. A., Carpenter, R. C. and Edmunds, P. J.: Calcium carbonate (CaCO3) sediment dissolution under elevated concentrations of carbon dioxide (CO2) and nitrate (NO3−). (2017) J. Exp. Mar. Bio. Ecol., 495, May, 48–56. doi: http://doi.org/10.1016/j.jembe.2017.05.014

The alkalinity anomaly technique was employed to measure changes in seawater total alkalinity inside of stirred benthic chambers. Water samples (75 mL) were taken at the beginning and end of each incubation from 0.6 cm diameter polyvinyl chloride in-line tubes connected to the side of the chamber, and these were used to measure seawater temperature, salinity, pH, and total alkalinity (TA). Temperature was recorded with a thermometer (± 0.05 oC; ThermoFisher Traceable®) and salinity was measured with a bench-top conductivity meter (± 0.1 psu, YSI® 3100). TA and pH were measured within one hour of sample collection. Seawater collected for TA was filtered (0.45 µm; Chanson and Millero, 2007) and analyzed using potentiometric titrations with 0.1-N HCl using an automatic titrator (Mettler Toledo T50) (Dickson et al., 2007). Seawater pH was measured as mV and temperature with a potentiometric electrode (Orion ROSS pH/ATC Triode) and converted to the total scale (pHT) using a calibration relationship prepared using Tris-buffers (Nemzer and Dickson, 2005).

See the publication for a detailed overview of the methodology.

Data Files

File
phase1_elevated_pCO2.csv (Comma Separated Values (.csv), 15.55 KB) MD5:2e7545a8a45715e3763fce6cf16341ea Primary data file for dataset ID 735833

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1415268

Deployments

None available yet

Instruments

Automatic titrator

Supplied Name: Mettler Toledo T50

Supplied Description:

Instrument Type

Generic Name: Automatic titrator

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/LAB12/

Generic Description:

Instruments that incrementally add quantified aliquots of a reagent to a sample until the end-point of a chemical reaction is reached.

Benchtop pH Meter

Supplied Name: Orion ROSS pH/ATC Triode

Supplied Description:

Instrument Type

Generic Name: Benchtop pH Meter

Generic Description:

An instrument consisting of an electronic voltmeter and pH-responsive electrode that gives a direct conversion of voltage differences to differences of pH at the measurement temperature. (McGraw-Hill Dictionary of Scientific and Technical Terms)

This instrument does not map to the NERC instrument vocabulary term for 'pH Sensor' which measures values in the water column. Benchtop models are typically employed for stationary lab applications.

digital thermometer

Supplied Name: ThermoFisher Traceable

Supplied Description:

Instrument Type

Generic Name: digital thermometer

Generic Description:

An instrument that measures temperature digitally.

Salinity Sensor

Supplied Name: YSI 3100

Supplied Description:

Instrument Type

Generic Name: Salinity Sensor

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/350/

Generic Description:

Category of instrument that simultaneously measures electrical conductivity and temperature in the water column to provide temperature and salinity data.

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
Date	Date of experiment in format yyyy-mm-dd	no units	date
Flume	Flume number	no units	sample_descrip
Chamber	Chamber number	no units	sample_descrip
Target_pCO2	Target pCO2	uatm	pCO2
day_night	Indicates whether incubation took place during day or night	no units	sample_descrip
Target_nitrate	Target nitrate	uatm	NO3
Salinity	Salinity	psu	sal
Clock1	Time at beginning of incubation; Hawaii Standard Time	no units	no_bcodmo_term
Temp1	Temperature at beginning of incubation	degrees celsius	no_bcodmo_term
mV1	Millivolts of seawater measured with a potentiometric probe at the start of the incubation	mV	no_bcodmo_term
TA1	Total alkalinity measured at the beginning of the incubation	umol/kg	TALK
pCO21	Partial pressure of CO2 measured at the beginning of the incubation	uatm	pCO2
Clock2	Time at the end of the incubation; Hawaii Standard Time	no units	no_bcodmo_term
Temp2	Temperature measured at the end of the incubation	degrees Celsius	no_bcodmo_term
mV2	Millivolts of seawater measured at the end of the incubation	mV	no_bcodmo_term
TA2	Total alkalinity measured at the end of the experiment	umol/kg	TALK
pCO22	Partial presssure of CO2 measured at the end of the incubation	uatm	pCO2
Gnet	Calculated rate of net calcification as grams of CaCO3 per meter squared per day	per meter squared per day	no_bcodmo_term

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Database

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Dataset: phase1_elevated_pCO2