Dataset: Dissolved Inorganic Carbon
Deployment: PICO_1-301

Dissolved inorganic carbon (DIC) from the PICO time-series station.

Principal Investigator:

Zackary I. Johnson (Duke University)

Co-Principal Investigator:

Dana Hunt (Duke University)

Contact:

Zackary I. Johnson (Duke University)

BCO-DMO Data Manager:

Shannon Rauch (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Project:

Pivers Island Coastal Observatory (PICO)

Current State:

Final with updates expected

Version:

30 Aug 2013

Deployment Synonyms:

PICO

Version Date:

2013-08-30

Data URL:

https://www.bco-dmo.org/dataset-deployment/456097/data

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Description

Dissolved inorganic carbon (DIC; uM Carbon) from the Pivers Island Coastal Observatory (PICO) from 2010 to 2012.

Note: DIC was not measured at all time points, thus, some dates have no data ('nd') in the 'DIC' column.

Methods & Sampling

Dataset acquisition description

Water was sampled using a 5 L niskin bottle centered at 1 m with a bottle length of 0.7 m. DIC was measured on mercuric chloride poisoned samples by acidification and subsequent quantification of released CO2 using a CO2 detector (Li-Cor 7000). DIC samples were collected following recommended procedures (Dickson et al., 2007) and measurements were calibrated against Certified Reference Materials provided by Dr. A. G. Dickson at Scripps Institution of Oceanography (SIO), University of California, San Diego (UCSD).

References:
Dickson, A.G., Sabine, C.L., and Christian, J.R. (eds) (2007) Guide to best practices for ocean CO2 measurements: PICES Special Publication 3.

Data Processing Description

Dataset Processing Description

Quality Scores (qflag) as follows:
1 = excellent (no known issues),
2 = suspect,
3 = poor (known reason to suspect data).

BCO-DMO Processing Notes:
- Created 'replicate' column and re-arranged data so that replicates are in rows, not columns.
- Modified parameter names to conform with BCO-DMO naming conventions.
- Replaced blanks with 'nd' to indicate 'no data'.
- Separated date into month, day, and year columns.

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1031064	NSF Division of Ocean Sciences
OCE-RIG-1322950	NSF Ocean Sciences Research Initiation Grants

Instruments

LI-COR LI-7000 Gas Analyzer

Supplied Description:

DIC was measured on mercuric chloride poisoned samples by acidification and subsequent quantification of released CO2 using a Li-Cor 7000 CO2 detector.

Instrument Type

Generic Name: LI-COR LI-7000 Gas Analyzer

Acronym: LI-COR LI-7000

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/382/

Generic Description:

The LI-7000 CO2/H2O Gas Analyzer is a high performance, dual cell, differential gas analyzer. It was designed to expand on the capabilities of the LI-6262 CO2/ H2O Gas Analyzer. A dichroic beam splitter at the end of the optical path provides radiation to two separate detectors, one filtered to detect radiation absorption of CO2 and the other to detect absorption by H2O. The two separate detectors measure infrared absorption by CO2 and H2O in the same gas stream. The LI-7000 CO2/ H2O Gas Analyzer is a differential analyzer, in which a known concentration (which can be zero) gas is put in the reference cell, and an unknown gas is put in the sample cell.

Niskin bottle

Supplied Description:

Water was sampled using a 5 Liter niskin bottle.

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
deployment	Deployment name/id number.	text	deployno
lat	Latitude of sampling location. Positive = North.	decimal degrees	lat
lon	Longitude of sampling location. Positive = East.	decimal degrees	lon
year	Year (local time) of the sampling event.	YYYY	year
month_local	Month (local time) when the sampling event occurred.	mm (01 to 12)	month_local
PID_num	Unique, sequential "occupation" number for sampling. (The unique time/day when sampling occurred.)	dimensionless	no_bcodmo_term
day_local	Day of month (local time) when the sampling event occurred.	dd (01 to 31)	day_local
time_local	Time (local) when the sampling event occurred; 24-hour clock.	HHMM.mm	time_local
time_qflag	Quality score for time_local: 1 = excellent (no known issues); 2 = suspect; 3 = poor (known reason to suspect data).	dimensionless	q_flag
depth	Depth of water sampling.	meters	depth
replicate	Replicate identifier. (All of the "A" DIC samples are from the same bottle, however "A" replicates for DIC are unrelated to "A" replicates in the other PICO datasets.)	text	replicate
DIC	Dissolved inorganic carbon.	micromolar Carbon (uM C)	DIC
DIC_qflag	Quality score for DIC: 1 = excellent (no known issues); 2 = suspect; 3 = poor (known reason to suspect data).	dimensionless	qflag
yrday	Consecutive day of year for a specified year, as a decimal. The fraction of the value represents the time within the day (e.g. a value of 1.5 means January 1 at 1200 hours).	dimensionless	yrday
ISO_DateTime_Local	Date-time (local) formatted to ISO 8601 standard.	YYYY-MM-DDTHH:MM:SS.ss	ISO_DateTime_Local

Database

Contribute Data

Dataset: Dissolved Inorganic Carbon
Deployment: PICO_1-301

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: Dissolved Inorganic CarbonDeployment: PICO_1-301

Dataset acquisition description

Dataset Processing Description

Dataset: Dissolved Inorganic Carbon
Deployment: PICO_1-301