Dataset Overview | National Centers for Environmental Information (NCEI)

Dissolved inorganic carbon (DIC), total alkalinity (TA), pCO2, chlorofluorocarbons (CFC-12), sulfur hexafluoride (SF6), nutrients, dissolved oxygen, temperature, salinity and other measurements collected from discrete samples and profile observations during the Fisheries and Oceans Canada CCGS Amundsen GO-SHIP AR07W Atlantic Zone Offshore Monitoring Program (AZOMP) cruise (EXPOCODE 18DL20200722) in the North Atlantic Ocean and Labrador Sea from 2020-07-22 to 2020-08-11 (NCEI Accession 0240681)

Preview graphic

This dataset includes discrete sample and profile data collected during the Fisheries and Oceans Canada CCGS Amundsen GO-SHIP AR07W Atlantic Zone Offshore Monitoring Program (AZOMP) cruise (EXPOCODE 18DL 18DL20200722) in the Labrador Sea, the North Atlantic from 2020-07-22 to 2020-08-11. These data include temperature, salinity, dissolved oxygen, nutrients, chlorofluorocarbon (CFC-12), sulfur hexafluoride (SF6), nutrients, dissolved inorganic carbon (DIC), total alkalinity (TA), pCO2 and other parameters. Oceanographic sampling of physical; biological and chemical parameters is performed annually along selected fixed sections (Labrador Sea and Scotian Slope/Rise) as part of the Atlantic Zone Off-shelf Monitoring Program. The sampling consists at a minimum of a vertical profile of the entire water column (temperature; salinity; dissolved oxygen); rosette bottle casts at selected depths (dissolved oxygen and nutrients; alkalinity and carbonate; chlorofluorocarbon (CFC) and biological parameters) as well as plankton net tows; additional upper ocean temperature and ocean currents profiles and moored measurements of near-bottom temperature and currents.

Dataset Citation

Cite as: Azetsu-Scott, Kumiko; Ringuette, Marc (2021). Dissolved inorganic carbon (DIC), total alkalinity (TA), pCO2, chlorofluorocarbons (CFC-12), sulfur hexafluoride (SF6), nutrients, dissolved oxygen, temperature, salinity and other measurements collected from discrete samples and profile observations during the Fisheries and Oceans Canada CCGS Amundsen GO-SHIP AR07W Atlantic Zone Offshore Monitoring Program (AZOMP) cruise (EXPOCODE 18DL20200722) in the North Atlantic Ocean and Labrador Sea from 2020-07-22 to 2020-08-11 (NCEI Accession 0240681). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/gjbq-re18. Accessed [date].

Dataset Identifiers

ISO 19115-2 Metadata

gov.noaa.nodc:0240681

Full Text · XML

Download Data	HTTPS (download) Navigate directly to the URL for data access and direct download. FTP (download) These data are available through the File Transfer Protocol (FTP). FTP is no longer supported by most internet browsers. You may copy and paste the FTP link to the data into an FTP client (e.g., FileZilla or WinSCP).
Distribution Formats	Originator data format
Ordering Instructions	Contact NCEI for other distribution options and instructions.
Distributor	NOAA National Centers for Environmental Information +1-301-713-3277 NCEI.Info@noaa.gov
Dataset Point of Contact	NOAA National Centers for Environmental Information ncei.info@noaa.gov

Time Period	2020-07-22 to 2020-08-11
Spatial Bounding Box Coordinates	West: 63.314 East: -48.181 South: 44.256 North: 60.611
Spatial Coverage Map

General Documentation

Project Metadata
Navigate directly to the URL for a descriptive web page with download links.
NCEI Dataset Landing Page
Navigate directly to the URL for a descriptive web page with download links.
Descriptive Information
Navigate directly to the URL for a descriptive web page with download links.

Associated Resources

CLIVAR Repeat Section AR07W
- https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/RepeatSections/clivar_ar07w.html
  related resource
NOAA National Centers for Environmental Information (2022). Ocean Carbon and Acidification Data System (OCADS). NOAA National Centers for Environmental Information. https://www.ncei.noaa.gov/products/ocean-carbon-acidification-data-system
- https://www.ncei.noaa.gov/products/ocean-carbon-acidification-data-system
  OCADS website
Hunt, Christopher W.; Azetsu-Scott, Kumiko (2024). Underway total alkalinity, water temperature, salinity and other variables collected from surface seawater during the R/V Atlantis Atlantic Zone Monitoring Program (AZMP2022) cruise (EXPOCODE 33AT20220319) in U.S. and Canadian East Coast waters and the Labrador Sea, North Atlantic Ocean from 2022-03-19 to 2022-05-16 (NCEI Accession 0288995). NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/rt60-ym68.
- https://www.ncei.noaa.gov/data/oceans/ncei/ocads/metadata/0288995.html
  Related data

Publication Dates	publication: 2021-08-31 revision: 2022-08-05
Data Presentation Form	Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress Status	Complete - production of the data has been completed Historical archive - data has been stored in an offline storage facility
Data Update Frequency	As needed
Supplemental Information	In this accession, NCEI has archived multiple versions of these data. The latest (and best) version of these data has the largest version number.
Purpose	The Atlantic Zone Off-Shelf Monitoring Program (AZOMP) collects and analyzes data from the continental slope and the deep waters of the northwestern Atlantic Ocean. It is a deeper-water complement to the Atlantic Zone Monitoring Program. Physical; chemical and biological oceanographic observations help us to monitor: the global climate system; variability in the ocean climate; ecosystems off Atlantic Canada and plankton affecting regional climate.
Use Limitations	accessLevel: Public Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.

Dataset Citation	Cite as: Azetsu-Scott, Kumiko; Ringuette, Marc (2021). Dissolved inorganic carbon (DIC), total alkalinity (TA), pCO2, chlorofluorocarbons (CFC-12), sulfur hexafluoride (SF6), nutrients, dissolved oxygen, temperature, salinity and other measurements collected from discrete samples and profile observations during the Fisheries and Oceans Canada CCGS Amundsen GO-SHIP AR07W Atlantic Zone Offshore Monitoring Program (AZOMP) cruise (EXPOCODE 18DL20200722) in the North Atlantic Ocean and Labrador Sea from 2020-07-22 to 2020-08-11 (NCEI Accession 0240681). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/gjbq-re18. Accessed [date].
Cited Authors	Azetsu-Scott, Kumiko Bedford Institute of Oceanography Ringuette, Marc Bedford Institute of Oceanography (BIO)
Principal Investigators	Kumiko Azetsu-Scott Bedford Institute of Oceanography (BIO) Marc Ringuette Bedford Institute of Oceanography (BIO)
Contributors	Bedford Institute of Oceanography (BIO) Department of Fisheries and Oceans Canada (DFO)
Resource Providers	Reid Steele Department of Fisheries and Oceans Canada; Marine Environmental Data Section (MEDS) Bedford Institute of Oceanography (BIO)
Publishers	NOAA National Centers for Environmental Information
Acknowledgments	Funding Information: Government of Canada: Fisheries and Oceans Canada (Aquatic Climate Change Adaptation Services Program (ACCASP), 881-15K-96036)

Theme keywords	NODC DATA TYPES THESAURUS AMMONIA (NH3) CHLOROFLUOROCARBON-12 (CFC-12) CHLOROPHYLL DISSOLVED INORGANIC CARBON (DIC) DISSOLVED OXYGEN nitrate + nitrite content (concentration) partial pressure of carbon dioxide - water PARTICULATE ORGANIC CARBON pH phosphate SALINITY silicate sulfur hexafluoride (SF6) total alkalinity WATER TEMPERATURE NODC OBSERVATION TYPES THESAURUS chemical discrete sample physical profile WMO_CategoryCode oceanography Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > ALKALINITY EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > AMMONIA EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CARBON DIOXIDE EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CHLOROPHYLL EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > INORGANIC CARBON EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITRATE EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITRITE EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > ORGANIC CARBON EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > OXYGEN EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PH EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PHOSPHATE EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > SILICATE EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE EARTH SCIENCE > OCEANS > SALINITY/DENSITY > SALINITY OCADS Study Type Discrete measurement Profile Provider Variable Abbreviations ALKALI CFC-12 CH4 CTDOXY CTDSAL CTDTMP NH3 OXYGEN PH_TOT SALNTY SF6 SiO3, NO3, NO2, PO4 TCARBN pCO2
Data Center keywords	NODC COLLECTING INSTITUTION NAMES THESAURUS Bedford Institute of Oceanography Department of Fisheries and Oceans Canada NODC SUBMITTING INSTITUTION NAMES THESAURUS Bedford Institute of Oceanography Global Change Master Directory (GCMD) Data Center Keywords CA/DFO > Fisheries and Oceans, Canada CA/DFO/BIO > Bedford Institute of Oceanography, Fisheries and Oceans, Canada
Platform keywords	NODC PLATFORM NAMES THESAURUS CCGS Amundsen Global Change Master Directory (GCMD) Platform Keywords Ships ICES/SeaDataNet Ship Codes Amundsen (call sign: CGDT, ICES code: 18DL, 2003)
Instrument keywords	NODC INSTRUMENT TYPES THESAURUS carbon dioxide (CO2) gas analyzer CTD Niskin bottle nutrient autoanalyzer oxygen sensor salinometer titrator Global Change Master Directory (GCMD) Instrument Keywords AUTOANALYZER > AUTOANALYZER CO2 ANALYZERS > CO2 ANALYZERS CTD > Conductivity, Temperature, Depth NISKIN BOTTLES OXYGEN METERS > OXYGEN METERS SALINOMETERS
Place keywords	NODC SEA AREA NAMES THESAURUS Labrador Sea North Atlantic Ocean Global Change Master Directory (GCMD) Location Keywords OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN Provider Geographic Names Labrador Sea North Atlantic Ocean
Project keywords	NODC PROJECT NAMES THESAURUS The Global Ocean Ship-based Hydrographic Investigations Program (GO-SHIP) US DOC; NOAA; Office of Oceanic and Atmospheric Research; Ocean Acidification Program (OAP) Cruise ID 18DL20001 EXPOCODE 18DL20200722 Ocean Acidification Search Keywords Ocean Carbon and Acidification Data System (OCADS) Project Reference Section ID GO-SHIP AR07W; Atlantic Zone Monitoring Program Research Projects Atlantic Zone Monitoring Program
Keywords	NCEI ACCESSION NUMBER 0240681

Use Constraints	Cite as: Azetsu-Scott, Kumiko; Ringuette, Marc (2021). Dissolved inorganic carbon (DIC), total alkalinity (TA), pCO2, chlorofluorocarbons (CFC-12), sulfur hexafluoride (SF6), nutrients, dissolved oxygen, temperature, salinity and other measurements collected from discrete samples and profile observations during the Fisheries and Oceans Canada CCGS Amundsen GO-SHIP AR07W Atlantic Zone Offshore Monitoring Program (AZOMP) cruise (EXPOCODE 18DL20200722) in the North Atlantic Ocean and Labrador Sea from 2020-07-22 to 2020-08-11 (NCEI Accession 0240681). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/gjbq-re18. Accessed [date].
Access Constraints	Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
Fees	In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media.

Lineage information for: dataset
Processing Steps	2021-08-31T21:02:11Z - NCEI Accession 0240681 v1.1 was published. 2022-08-05T18:49:04Z - NCEI Accession 0240681 was revised and v2.2 was published. Rationale: Updates were received for this dataset. These updates were copied into the data/0-data/ directory of this accession. These updates may provide additional files or replace obsolete files. This version contains the most complete and up-to-date representation of this archival information package. All of the files received prior to this update are available in the preceding version of this accession.
Output Datasets	NCEI Accession 0240681 v1.1 NCEI Accession 0240681 v1.1 (download) published 2021-08-31T21:02:11Z NCEI Accession 0240681 v2.2 NCEI Accession 0240681 v2.2 (download) published 2022-08-05T18:49:04Z

Lineage information for: dataset

Processing Steps

2021-08-31T21:02:11Z - NCEI Accession 0240681 v1.1 was published.
2022-08-05T18:49:04Z - NCEI Accession 0240681 was revised and v2.2 was published.
Rationale: Updates were received for this dataset. These updates were copied into the data/0-data/ directory of this accession. These updates may provide additional files or replace obsolete files. This version contains the most complete and up-to-date representation of this archival information package. All of the files received prior to this update are available in the preceding version of this accession.

Output Datasets

NCEI Accession 0240681 v1.1
- NCEI Accession 0240681 v1.1 (download)
  published 2021-08-31T21:02:11Z

NCEI Accession 0240681 v2.2
- NCEI Accession 0240681 v2.2 (download)
  published 2022-08-05T18:49:04Z

Lineage information for: dataset
Processing Steps	Parameter or Variable: Dissolved Inorganic Carbon; Abbreviation: TCARBN; Unit: umol / kg; Observation type: discrete; Measured or calculated: measured; Sampling instrument: CTD and rosette bottle sampler: Niskin bottle; 10 L; Analyzing instrument: SOMMA with UIC 5011 coulometer; Detailed sampling and analyzing information: Seawater samples were collected from standard depths in 500 mL borosilicate glass reagent bottles. Five mL of water was removed to allow room for thermal expansion and the sample was preserved within 30 minutes of collection with 0.1 mL of a mercuric chloride saturated solution; then sealed with Apiezon M grease and the ground glass stoppers secured in place with rubber bands. The samples were stored at room temperature until on-shore laboratory analysis. The samples were analysed for DIC using a SOMMA sample handling system in conjunction with a coulometer (UIC Inc.) to quantify total CO2 purged from the acidified sample. Measurements of a Certified reference material seawater (CRMs; Scripps Oceanographic Institution) were used for calibrating DIC with each batch of 20 samples being bracketed by duplicate CRM measurements.; Replicate information: Referenced to duplicate measurement of CRM prior to; and following; each daily batch of DIC samples; Standardization description: Referenced to duplicate measurement of CRM prior to each daily batch of DIC; Standardization frequency: To bracket each batch of 20 samples; CRM manufacturer: Andrew Dickson's Lab at Scripps Institute of Oceanography (co2crms@ucsd.edu); CRM batch number: 186; Preservation method: Mercuric chloride saturated solution; Preservative volume: 100 uL per 500 ml sample bottle = 0.02%; Preservative correction: None; Uncertainty: 0.0015 umol.kg; Quality flag convention: 1 = Sample drawn from bottle but analysis not recieved; 2 = QC Performed: Acceptable Measurement; 3 = QC Performed: Questionable Measurement; 4 = QC Performed: Bad Measurement; 5 = QC Performed: Not Reported; 6 = Mean of replicate measurements; 7 = Manual chromatographic peak measurement; 8 = Irregular digital chromatographic peak integration; 9 = Not sampled; Method reference: Dickson; A.G.; Sabine; C.L. and Christian; J.R. (Eds.) 2007. Guide to Best Practices for Ocean CO2 Measurements. PICES Special Publication 3; 191 pp.; https://cdiac.ess-dive.lbl.gov/ftp/oceans/Handbook_2007/Guide_all_in_one.pdf; Researcher name: Kumiko Azetsu-Scott; Researcher institution: Bedford Institute of Oceanography. Parameter or Variable: Total alkalinity; Abbreviation: ALKALI; Unit: umol / kg; Observation type: discrete; Measured or calculated: measured; Calculation method and parameters: Concentration (umol / kg) = concentration (umoles/litre) / density (10 C;S); Sampling instrument: CTD and rosette bottle sampler: Niskin bottle; 10 L; Analyzing instrument: In-house automated sampler with Metrohm Titrando dosimat and Tiamo software; Type of titration: Potentiometric multi point titration; Cell type (open or closed): Open; Curve fitting method: Gran point; Detailed sampling and analyzing information: Seawater samples were collected from standard depths in 500 mL borosilicate glass reagent bottles. Five mL of water was removed to allow room for thermal expansion and the sample was preserved within 30 minutes of collection with 0.1 mL of a mercuric chloride saturated solution; then sealed with Apiezon M grease and the ground glass stoppers secured in place with rubber bands. The samples were stored at room temperature until on-shore laboratory analysis. TA in the sample was determined using an open cell automated potentiometric titration with a Metrohm Titrando dosing unit controlled by Metrohm Tiamo software. The multi-point titration; using 0.1N HCl titrant containing 35 g of sodium chloride per litre of acid; was performed in a temperature controlled flask held at 25 ¬∞C with Gran endpoint determination. Measurements of a Certified reference material seawater (CRMs; Scripps Oceanographic Institution) were used for calibrating TA with each batch of 20 samples being bracketed by duplicate CRM measurements.; Replicate information: Monoplicate sample / monoplicate measurement; Standardization description: Referenced to duplicate measurement of CRM prior to each daily batch of samples; Standardization frequency: Each batch of 20 samples; CRM manufacturer: Andrew Dickson's Lab at Scripps Institute of Oceanography; CRM batch number: 186; Preservation method: Mercuric chloride saturated solution; Preservative volume: 100 uL per 500 ml sample bottle = 0.02%; Preservative correction: none; TA blank correction: Averages between 10-40 umol / kg; Uncertainty: 0.0025; Quality flag convention: 1 = Sample drawn from bottle but analysis not recieved; 2 = QC Performed: Acceptable Measurement; 3 = QC Performed: Questionable Measurement; 4 = QC Performed: Bad Measurement; 5 = QC Performed: Not Reported; 6 = Mean of replicate measurements; 7 = Manual chromatographic peak measurement; 8 = Irregular digital chromatographic peak integration; 9 = Not sampled; Method reference: This is method described in SOP 3a of Dickson; A.G.; Sabine; C.L. and Christian; J.R. (Eds.) 2007. Guide to Best Practices for Ocean CO2 Measurements. PICES Special Publication 3; 191 pp; Researcher name: Kumiko Azetsu-Scott; Researcher institution: Bedford Institute of Oceanography. Parameter or Variable: Partial Pressure of CO2; Abbreviation: pCO2; Unit: uatm; Observation type: discrete; Sampling instrument: Niskin bottle; 10 L; Analyzing instrument: SRI 8610C gas chromatograph with flame ionization detector and methanizer; Detailed sampling and analyzing information: Seawater samples were collected in 160 mL volume crimp seal serum bottles; allowing the bottle to overflow by 3 volumes. The sample was immediately stabilised by the addition of 50 mL of saturated mercuric chloride solution; crimp sealed with a butyl rubber septum then stored in a refrigerator. Before analysis; a 11 mL headspace of 400 ppm CO2 in zero air was introduced into the bottle which was then thermally equilibrated at 22 ¬∞C for one hour. The bottle was then shaken vigorously for 8 minutes and the headspace displaced by a brine solution; flushing the sample loop of an SRI gas chromatograph equipped with a methaniser and flame ionisation detector. CO2 peaks were calibrated by injections of primary standard gas mixtures (Air Liquide) having CO2 mixing ratios of 397.3; 797.2; 1201 and 2017 ppm.; Uncertainty: 1 uatm; Quality flag convention: 1 = Sample drawn from bottle but analysis not recieved; 2 = QC Performed: Acceptable Measurement; 3 = QC Performed: Questionable Measurement; 4 = QC Performed: Bad Measurement; 5 = QC Performed: Not Reported; 6 = Mean of replicate measurements; 7 = Manual chromatographic peak measurement; 8 = Irregular digital chromatographic peak integration; 9 = Not sampled; Method reference: Dickson; A.G.; Sabine; C.L. and Christian; J.R. (Eds.) 2007. Guide to Best Practices for Ocean CO2 Measurements. PICES Special Publication 3; 191 pp.; https://cdiac.ess-dive.lbl.gov/ftp/oceans/Handbook_2007/Guide_all_in_one.pdf; Researcher name: Kumiko Azetsu-Scott; Researcher institution: Bedford Institute of Oceanography. Parameter or Variable: Ammonia; Abbreviation: NH3; Unit: umol/kg; Observation type: discrete; Sampling instrument: Niskin bottle; 10 L; Analyzing instrument: Unfiltered; Detailed sampling and analyzing information: Name - Ammonia; Description - ; Preservative - not applicable; Storage - not applicable; Replicate information: Average of replicates; Quality flag convention: 1 = Sample drawn from bottle but analysis not recieved; 2 = QC Performed: Acceptable Measurement; 3 = QC Performed: Questionable Measurement; 4 = QC Performed: Bad Measurement; 5 = QC Performed: Not Reported; 6 = Mean of replicate measurements; 7 = Manual chromatographic peak measurement; 8 = Irregular digital chromatographic peak integration; 9 = Not sampled; Method reference: Kerovel; R. and A. Aminot. 1997 Fluorometric determination of ammonia in sea and estuarine waters by direct segmented flow analysis. Mar. Chem. 57:265-275; Researcher name: Marc Ringuette; Researcher institution: Bedford Institute of Oceanography. Parameter or Variable: CTD Temperature; Abbreviation: CTDTMP; Unit: degrees celcius; Observation type: CTD sensor; Sampling instrument: CTD; Analyzing instrument: CTD; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value. Parameter or Variable: CTD Salinity; Abbreviation: CTDSAL; Observation type: CTD sensor; Sampling instrument: CTD; Analyzing instrument: CTD; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value. Parameter or Variable: CTD Oxygen; Abbreviation: CTDOXY; Unit: umol/kg; Observation type: CTD sensor; Sampling instrument: CTD; Analyzing instrument: CTD; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value. Parameter or Variable: Bottle Salinity; Abbreviation: SALNTY; Observation type: Bottle, discrete; Sampling instrument: CTD; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value. Parameter or Variable: Bottle Oxygen; Abbreviation: OXYGEN; Unit: UMOL/KG; Observation type: Bottle, discrete; Sampling instrument: CTD; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value. Parameter or Variable: Chlorofluorocarbon 12; Abbreviation: CFC-12; Unit: PMOL/KG; Observation type: Bottle, discrete; Sampling instrument: Niskin bottles; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value. Parameter or Variable: Nutrients; Abbreviation: SiO3, NO3, NO2, PO4; Unit: UMOL/KG; Observation type: Bottle, discrete; Sampling instrument: Niskin bottles; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value. Parameter or Variable: sulfur hexafluoride; Abbreviation: SF6; Unit: FMOL/KG; Observation type: Bottle, discrete; Sampling instrument: Niskin bottles; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value. Parameter or Variable: methane; Abbreviation: CH4; Unit: NMOL/KG; Observation type: Bottle, discrete; Sampling instrument: Niskin bottles; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value .

Lineage information for: dataset

Processing Steps

Parameter or Variable: Dissolved Inorganic Carbon; Abbreviation: TCARBN; Unit: umol / kg; Observation type: discrete; Measured or calculated: measured; Sampling instrument: CTD and rosette bottle sampler: Niskin bottle; 10 L; Analyzing instrument: SOMMA with UIC 5011 coulometer; Detailed sampling and analyzing information: Seawater samples were collected from standard depths in 500 mL borosilicate glass reagent bottles. Five mL of water was removed to allow room for thermal expansion and the sample was preserved within 30 minutes of collection with 0.1 mL of a mercuric chloride saturated solution; then sealed with Apiezon M grease and the ground glass stoppers secured in place with rubber bands. The samples were stored at room temperature until on-shore laboratory analysis. The samples were analysed for DIC using a SOMMA sample handling system in conjunction with a coulometer (UIC Inc.) to quantify total CO2 purged from the acidified sample. Measurements of a Certified reference material seawater (CRMs; Scripps Oceanographic Institution) were used for calibrating DIC with each batch of 20 samples being bracketed by duplicate CRM measurements.; Replicate information: Referenced to duplicate measurement of CRM prior to; and following; each daily batch of DIC samples; Standardization description: Referenced to duplicate measurement of CRM prior to each daily batch of DIC; Standardization frequency: To bracket each batch of 20 samples; CRM manufacturer: Andrew Dickson's Lab at Scripps Institute of Oceanography (co2crms@ucsd.edu); CRM batch number: 186; Preservation method: Mercuric chloride saturated solution; Preservative volume: 100 uL per 500 ml sample bottle = 0.02%; Preservative correction: None; Uncertainty: 0.0015 umol.kg; Quality flag convention: 1 = Sample drawn from bottle but analysis not recieved; 2 = QC Performed: Acceptable Measurement; 3 = QC Performed: Questionable Measurement; 4 = QC Performed: Bad Measurement; 5 = QC Performed: Not Reported; 6 = Mean of replicate measurements; 7 = Manual chromatographic peak measurement; 8 = Irregular digital chromatographic peak integration; 9 = Not sampled; Method reference: Dickson; A.G.; Sabine; C.L. and Christian; J.R. (Eds.) 2007. Guide to Best Practices for Ocean CO2 Measurements. PICES Special Publication 3; 191 pp.; https://cdiac.ess-dive.lbl.gov/ftp/oceans/Handbook_2007/Guide_all_in_one.pdf; Researcher name: Kumiko Azetsu-Scott; Researcher institution: Bedford Institute of Oceanography.
Parameter or Variable: Total alkalinity; Abbreviation: ALKALI; Unit: umol / kg; Observation type: discrete; Measured or calculated: measured; Calculation method and parameters: Concentration (umol / kg) = concentration (umoles/litre) / density (10 C;S); Sampling instrument: CTD and rosette bottle sampler: Niskin bottle; 10 L; Analyzing instrument: In-house automated sampler with Metrohm Titrando dosimat and Tiamo software; Type of titration: Potentiometric multi point titration; Cell type (open or closed): Open; Curve fitting method: Gran point; Detailed sampling and analyzing information: Seawater samples were collected from standard depths in 500 mL borosilicate glass reagent bottles. Five mL of water was removed to allow room for thermal expansion and the sample was preserved within 30 minutes of collection with 0.1 mL of a mercuric chloride saturated solution; then sealed with Apiezon M grease and the ground glass stoppers secured in place with rubber bands. The samples were stored at room temperature until on-shore laboratory analysis. TA in the sample was determined using an open cell automated potentiometric titration with a Metrohm Titrando dosing unit controlled by Metrohm Tiamo software. The multi-point titration; using 0.1N HCl titrant containing 35 g of sodium chloride per litre of acid; was performed in a temperature controlled flask held at 25 ¬∞C with Gran endpoint determination. Measurements of a Certified reference material seawater (CRMs; Scripps Oceanographic Institution) were used for calibrating TA with each batch of 20 samples being bracketed by duplicate CRM measurements.; Replicate information: Monoplicate sample / monoplicate measurement; Standardization description: Referenced to duplicate measurement of CRM prior to each daily batch of samples; Standardization frequency: Each batch of 20 samples; CRM manufacturer: Andrew Dickson's Lab at Scripps Institute of Oceanography; CRM batch number: 186; Preservation method: Mercuric chloride saturated solution; Preservative volume: 100 uL per 500 ml sample bottle = 0.02%; Preservative correction: none; TA blank correction: Averages between 10-40 umol / kg; Uncertainty: 0.0025; Quality flag convention: 1 = Sample drawn from bottle but analysis not recieved; 2 = QC Performed: Acceptable Measurement; 3 = QC Performed: Questionable Measurement; 4 = QC Performed: Bad Measurement; 5 = QC Performed: Not Reported; 6 = Mean of replicate measurements; 7 = Manual chromatographic peak measurement; 8 = Irregular digital chromatographic peak integration; 9 = Not sampled; Method reference: This is method described in SOP 3a of Dickson; A.G.; Sabine; C.L. and Christian; J.R. (Eds.) 2007. Guide to Best Practices for Ocean CO2 Measurements. PICES Special Publication 3; 191 pp; Researcher name: Kumiko Azetsu-Scott; Researcher institution: Bedford Institute of Oceanography.
Parameter or Variable: Partial Pressure of CO2; Abbreviation: pCO2; Unit: uatm; Observation type: discrete; Sampling instrument: Niskin bottle; 10 L; Analyzing instrument: SRI 8610C gas chromatograph with flame ionization detector and methanizer; Detailed sampling and analyzing information: Seawater samples were collected in 160 mL volume crimp seal serum bottles; allowing the bottle to overflow by 3 volumes. The sample was immediately stabilised by the addition of 50 mL of saturated mercuric chloride solution; crimp sealed with a butyl rubber septum then stored in a refrigerator. Before analysis; a 11 mL headspace of 400 ppm CO2 in zero air was introduced into the bottle which was then thermally equilibrated at 22 ¬∞C for one hour. The bottle was then shaken vigorously for 8 minutes and the headspace displaced by a brine solution; flushing the sample loop of an SRI gas chromatograph equipped with a methaniser and flame ionisation detector. CO2 peaks were calibrated by injections of primary standard gas mixtures (Air Liquide) having CO2 mixing ratios of 397.3; 797.2; 1201 and 2017 ppm.; Uncertainty: 1 uatm; Quality flag convention: 1 = Sample drawn from bottle but analysis not recieved; 2 = QC Performed: Acceptable Measurement; 3 = QC Performed: Questionable Measurement; 4 = QC Performed: Bad Measurement; 5 = QC Performed: Not Reported; 6 = Mean of replicate measurements; 7 = Manual chromatographic peak measurement; 8 = Irregular digital chromatographic peak integration; 9 = Not sampled; Method reference: Dickson; A.G.; Sabine; C.L. and Christian; J.R. (Eds.) 2007. Guide to Best Practices for Ocean CO2 Measurements. PICES Special Publication 3; 191 pp.; https://cdiac.ess-dive.lbl.gov/ftp/oceans/Handbook_2007/Guide_all_in_one.pdf; Researcher name: Kumiko Azetsu-Scott; Researcher institution: Bedford Institute of Oceanography.
Parameter or Variable: Ammonia; Abbreviation: NH3; Unit: umol/kg; Observation type: discrete; Sampling instrument: Niskin bottle; 10 L; Analyzing instrument: Unfiltered; Detailed sampling and analyzing information: Name - Ammonia; Description - ; Preservative - not applicable; Storage - not applicable; Replicate information: Average of replicates; Quality flag convention: 1 = Sample drawn from bottle but analysis not recieved; 2 = QC Performed: Acceptable Measurement; 3 = QC Performed: Questionable Measurement; 4 = QC Performed: Bad Measurement; 5 = QC Performed: Not Reported; 6 = Mean of replicate measurements; 7 = Manual chromatographic peak measurement; 8 = Irregular digital chromatographic peak integration; 9 = Not sampled; Method reference: Kerovel; R. and A. Aminot. 1997 Fluorometric determination of ammonia in sea and estuarine waters by direct segmented flow analysis. Mar. Chem. 57:265-275; Researcher name: Marc Ringuette; Researcher institution: Bedford Institute of Oceanography.
Parameter or Variable: CTD Temperature; Abbreviation: CTDTMP; Unit: degrees celcius; Observation type: CTD sensor; Sampling instrument: CTD; Analyzing instrument: CTD; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value.
Parameter or Variable: CTD Salinity; Abbreviation: CTDSAL; Observation type: CTD sensor; Sampling instrument: CTD; Analyzing instrument: CTD; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value.
Parameter or Variable: CTD Oxygen; Abbreviation: CTDOXY; Unit: umol/kg; Observation type: CTD sensor; Sampling instrument: CTD; Analyzing instrument: CTD; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value.
Parameter or Variable: Bottle Salinity; Abbreviation: SALNTY; Observation type: Bottle, discrete; Sampling instrument: CTD; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value.
Parameter or Variable: Bottle Oxygen; Abbreviation: OXYGEN; Unit: UMOL/KG; Observation type: Bottle, discrete; Sampling instrument: CTD; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value.
Parameter or Variable: Chlorofluorocarbon 12; Abbreviation: CFC-12; Unit: PMOL/KG; Observation type: Bottle, discrete; Sampling instrument: Niskin bottles; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value.
Parameter or Variable: Nutrients; Abbreviation: SiO3, NO3, NO2, PO4; Unit: UMOL/KG; Observation type: Bottle, discrete; Sampling instrument: Niskin bottles; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value.
Parameter or Variable: sulfur hexafluoride; Abbreviation: SF6; Unit: FMOL/KG; Observation type: Bottle, discrete; Sampling instrument: Niskin bottles; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value.
Parameter or Variable: methane; Abbreviation: CH4; Unit: NMOL/KG; Observation type: Bottle, discrete; Sampling instrument: Niskin bottles; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value .

Acquisition Information (collection)
Instrument	carbon dioxide (CO2) gas analyzer CTD Niskin bottle nutrient autoanalyzer oxygen sensor salinometer titrator
Platform	CCGS Amundsen

Last Modified: 2024-06-10T13:19:43Z
For questions about the information on this page, please email: ncei.info@noaa.gov

Follow us

Contact us