Dataset: Shaw 2016: carbonate chemistry
Deployment: MCR_Edmunds

Carbonate chemistry during Acropora pulchra calcification experiments

Principal Investigator:

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

Co-Principal Investigator:

Robert Carpenter (California State University Northridge, CSUN)

Technician:

Griffin Srednick (California State University Northridge, CSUN)

Megan Vaughan (California State University Northridge, CSUN)

BCO-DMO Data Manager:

Amber D. York (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

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

Moorea Coral Reef Long-Term Ecological Research site (MCR LTER)

Current State:

Preliminary and in progress

Data URL:

https://osprey.bco-dmo.org/dataset-deployment/684614/data

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Description

These data were utilized in Shaw et al., 2016.

Related datasets also utilized in Shaw et al. 2016:
* These calcification rate datasets took place while these carbonate chemistry measurements were being taken .
Acropora pulchra calcification experiment 1
Acropora pulchra calcification experiment 2

Methods & Sampling

Dataset acquisition description

Determinations of seawater pH on the total scale were completed daily using a Mettler DGi-115 pH electrode, which was calibrated with TRIS buffers [SOP 6a (Dickson et al. 2007)]. Total alkalinity (AT) was measured every 3 days using the open cell method of acidimetric titration [SOP 3b, Dickson et al. (2007)]. Accuracy of AT analyses was determined through analysis of certified reference materials (CRMs; from A. Dickson Laboratory, Scripps Institution of Oceanography). The mean (+-SE) difference between measured and certified values of CRMs (i.e., accuracy) was 1.3 +- 0.3 μmol kg−1 (n = 34), and the precision was 1.8 +- 0.1 μmol kg−1 (n = 475).

Data Processing Description

Dataset Processing Description

The full carbonate system of parameters was calculated using measured pH, AT, temperature, and salinity with the R package seacarb (Lavigne and Gattuso 2010). Calculations were done using the carbonic acid dissociation constants of Lueker et al. (2000), the KSO4 for the bisulfate ion from Dickson (1990), and the Kf constant of Perez and Fraga (1987).

BCO-DMO Data Manager Processing Notes:
* added a conventional header with dataset name, PI name, version date
* modified parameter names to conform with BCO-DMO naming conventions
* All values were rounded to three decimal places if more than that.
* latitude and longitude added for experiment location

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1415268	NSF Division of Ocean Sciences
OCE-1415300	NSF Division of Ocean Sciences

Instruments

digital thermometer

Supplied Name: certified digital thermometer

Supplied Description:

Temperatures of each tank were measured daily using a certified digital thermometer (Fisher Scientific, 15-007-8, ±0.05 C)

Instrument Type

Generic Name: digital thermometer

Generic Description:

An instrument that measures temperature digitally.

pH Sensor

Supplied Name: Mettler DGi-115 pH electrode

Supplied Description:

Mettler DGi-115 pH electrode, which was calibrated with TRIS buffers [SOP 6a (Dickson et al. 2007)]

Instrument Type

Generic Name: pH Sensor

Generic Description:

An instrument that measures the hydrogen ion activity in solutions.

The overall concentration of hydrogen ions is inversely related to its pH. The pH scale ranges from 0 to 14 and indicates whether acidic (more H+) or basic (less H+).

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
exp_id	Experiment number (1 or 2)	unitless	exp_id
date	Date of sampling in format yyyy-mm-dd	unitless	date
treatment	CO2 treament identifier with format pCO2-temp or pCO2 type alone (Amb or Ambient = 400 uatm; High = 1000 uatm; temp in degrees C)	unitless	treatment
tank	Tank identifier	unitless	tank
sal	Salinity of tank	parts per thousand (ppt)	sal
temp	Temperature of tank	degrees Celsius	temp
patm	surface atmospheric pressure of tank	standard atmospheres (atm)	treatment
pH	pH of tank	total pH scale	pH
CO2	carbon dioxide concentration of tank	micromoles per kilogram seawater (umol kgSW-1)	TCO2
fCO2	CO2 fugacity computed at in situ temperature and atmospheric pressure for tank	micro atmospheres (uatm)	fCO2
pCO2	CO2 partial pressure computed at in situ temperature and atmospheric pressure for tank	micro atmospheres (uatm)	pCO2
HCO3	Bicarbonate concentration	micromoles per kilogram seawater (umol kgSW-1)	bicarbonate
CO3	Carbonate concentration	micromoles per kilogram seawater (umol kgSW-1)	carbonate
DIC	Dissolved inorganic carbon concentration for tank	micromoles per kilogram seawater (umol kgSW-1)	DIC
TA	Total alkalinity for tank	micromoles per kilogram seawater (umol kgSW-1)	TALK
omega_argonite	Aragonite saturation state for a given tank	dimensionless	OM_ar
omega_calcite	Calcite saturation state for a given tank	dimensionless	OM_ca
site	Location of experiment; MCR is shorthand for Moorea Coral Reef Long-Term Ecological Research site	unitless	site
lat	Latitude of sampling location	decimal degrees	lat
lon	Longitude of sampling location; west is negative	decimal degrees	lon

Database

Contribute Data

Dataset: Shaw 2016: carbonate chemistry
Deployment: MCR_Edmunds

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: Shaw 2016: carbonate chemistryDeployment: MCR_Edmunds

Dataset acquisition description

Dataset Processing Description

Dataset: Shaw 2016: carbonate chemistry
Deployment: MCR_Edmunds