Dataset Overview | National Centers for Environmental Information (NCEI)

Discrete profile measurements of dissolved inorganic carbon (DIC), total alkalinity (TA), salinity, oxygen, nutrients, and temperature during the CCGS John P. Tully cruise 2019.23 (EXPOCODE 18DD20190829) in the Salish Sea and off the west coast of Vancouver Island of the North American Pacific coast from 2019-08-29 to 2019-09-06 (NCEI Accession 0252614)

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This dataset consists of data collected during the CCGS John P. Tully cruise 2019.23 (EXPOCODE 18DD20190829) in the Salish Sea and off the west coast of Vancouver Island of the North American Pacific coast from 2019-08-29 to 2019-09-06 as part of the La Perouse Water Properties Survey. Discrete dissolved inorganic carbon (DIC), total alkalinity (TA), salinity, and nutrient samples were taken from rosette casts with 10L Niskin bottles and analysed at the Institute of Ocean Sciences. Discrete samples of dissolved oxygen were also collected and analysed onboard the vessel. CTD profiles were recorded with each rosette cast. DIC and TA samples were placed in cold storage for 1-4 weeks before analysis. A total of 61 DIC and TA pairs were sampled with a 22 percent replication rate. Replicates are not averaged in this dataset and appear individually, indicated by decimal sample ID's (e.g. 26.1, 26.2). The pooled standard deviations (of difference between replicate pairs) were calculated to be 6 umol/kg and 5 umol/kg respectively. Replicates with a QC flag = 3 were included in the pooled standard deviation calculation but replicate pairs with at least one QC flag = 4 (n = 1) were excluded.

Dataset Citation

Cite as: Sastri, Akash R.; Davelaar, Marty; Caleb, Danielle; Covert, Paul; Ianson, Debby; Gatien, Germaine; Scozzafava, Kenny; Miller, Matthew R.; Belton, Mark; Nemcek, Nina; Fraser, Tamara; Wietzke, Jasmine (2022). Discrete profile measurements of dissolved inorganic carbon (DIC), total alkalinity (TA), salinity, oxygen, nutrients, and temperature during the CCGS John P. Tully cruise 2019.23 (EXPOCODE 18DD20190829) in the Salish Sea and off the west coast of Vancouver Island of the North American Pacific coast from 2019-08-29 to 2019-09-06 (NCEI Accession 0252614). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/5fza-nj73. Accessed [date].

Dataset Identifiers

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gov.noaa.nodc:0252614

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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	2019-08-29 to 2019-09-06
Spatial Bounding Box Coordinates	West: -126.72 East: -124.99 South: 48.42 North: 50.5
Spatial Coverage Map

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Associated Resources

Salish Cruise Data Package
- https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/SalishCruise_DataPackage.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

Publication Dates	publication: 2022-04-26 creation: 2022-04-25
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	This data package (Submission ID: BF1B8WL2Z) was acquired by NCEI from the Scientific Data Integration System (SDIS) at the NOAA Pacific Marine Environmental Laboratory (PMEL) in accordance with the archival submission agreement between NCEI and PMEL.
Purpose	La Perouse Program Water Properties Survey
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: Sastri, Akash R.; Davelaar, Marty; Caleb, Danielle; Covert, Paul; Ianson, Debby; Gatien, Germaine; Scozzafava, Kenny; Miller, Matthew R.; Belton, Mark; Nemcek, Nina; Fraser, Tamara; Wietzke, Jasmine (2022). Discrete profile measurements of dissolved inorganic carbon (DIC), total alkalinity (TA), salinity, oxygen, nutrients, and temperature during the CCGS John P. Tully cruise 2019.23 (EXPOCODE 18DD20190829) in the Salish Sea and off the west coast of Vancouver Island of the North American Pacific coast from 2019-08-29 to 2019-09-06 (NCEI Accession 0252614). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/5fza-nj73. Accessed [date].
Cited Authors	Sastri, Akash R. Fisheries and Oceans Canada, Institute of Ocean Sciences Davelaar, Marty Fisheries and Oceans Canada, Institute of Ocean Sciences Caleb, Danielle Department of Fisheries and Oceans Canada, Institute of Ocean Sciences - Victoria Covert, Paul Fisheries and Oceans Canada Ianson, Debby Fisheries and Oceans Canada, Institute of Ocean Sciences Gatien, Germaine Scozzafava, Kenny Fisheries and Oceans Canada, Institute of Ocean Sciences Miller, Matthew R. University of Victoria (UVic) Belton, Mark Fisheries and Oceans Canada, Institute of Ocean Sciences Nemcek, Nina Fraser, Tamara Fisheries and Oceans Canada, Institute of Ocean Sciences Wietzke, Jasmine
Principal Investigators	Akash Sastri Fisheries and Oceans Canada, Institute of Ocean Sciences Debby Ianson Fisheries and Oceans Canada, Institute of Ocean Sciences
Collaborators	Tamara Fraser Fisheries and Oceans Canada, Institute of Ocean Sciences Paul A. Covert Fisheries and Oceans Canada Nina Nemcek Matthew R. Miller University of Victoria (UVic) Marty Davelaar Fisheries and Oceans Canada, Institute of Ocean Sciences Mark Belton Fisheries and Oceans Canada, Institute of Ocean Sciences Kenny Scozzafava Fisheries and Oceans Canada, Institute of Ocean Sciences Jasmine Wietzke Germaine Gatien Danielle Caleb Department of Fisheries and Oceans Canada, Institute of Ocean Sciences - Victoria
Contributors	Fisheries and Oceans Canada, Institute of Ocean Sciences
Resource Providers	Matthew R. Miller University of Victoria (UVic) University of Victoria (UVic)
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 AMMONIUM (NH4) DISSOLVED INORGANIC CARBON (DIC) DISSOLVED OXYGEN HYDROSTATIC PRESSURE nitrate + nitrite content (concentration) phosphate SALINITY silicate 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 > ALKALINITY EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > AMMONIA EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > INORGANIC CARBON EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITRATE EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITRITE EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > OXYGEN EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PHOSPHATE EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > SILICATE EARTH SCIENCE > OCEANS > OCEAN PRESSURE > WATER PRESSURE EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE EARTH SCIENCE > OCEANS > SALINITY/DENSITY > SALINITY OCADS Study Type Discrete measurement Profile Provider Keywords Salish Sea Provider Variable Abbreviations AMMONIUM CTDPRS CTDSAL CTDTMP DIC NITRATE_NITRITE OXYGEN PHOSPHATE SALINITY SILICATE TA
Data Center keywords	NODC COLLECTING INSTITUTION NAMES THESAURUS Fisheries and Oceans Canada, Institute of Ocean Sciences NODC SUBMITTING INSTITUTION NAMES THESAURUS University of Victoria Global Change Master Directory (GCMD) Data Center Keywords CA/DFO/PR/SB/IOS > Institute of Ocean Sciences, Science Branch, Pacific Region, Fisheries and Oceans, Canada
Platform keywords	NODC PLATFORM NAMES THESAURUS JOHN P. TULLY ICES/SeaDataNet Ship Codes JOHN P. TULLY (call sign: CG2958, ICES code: 18DD, 1984-)
Instrument keywords	NODC INSTRUMENT TYPES THESAURUS bottle CTD Global Change Master Directory (GCMD) Instrument Keywords CTD > Conductivity, Temperature, Depth
Place keywords	NODC SEA AREA NAMES THESAURUS North Pacific Ocean Global Change Master Directory (GCMD) Location Keywords OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN Provider Geographic Names North Pacific Ocean Salish Sea
Project keywords	NODC PROJECT NAMES THESAURUS Ocean Carbon and Acidification Data System (OCADS) Cruise ID 2019.23 EXPOCODE 18DD20190829 Ocean Acidification Search Keywords Ocean Carbon and Acidification Data System (OCADS) Project Reference Section ID Coastal Research Projects La Perouse Program Water Properties Survey
Keywords	NCEI ACCESSION NUMBER 0252614

Use Constraints	Cite as: Sastri, Akash R.; Davelaar, Marty; Caleb, Danielle; Covert, Paul; Ianson, Debby; Gatien, Germaine; Scozzafava, Kenny; Miller, Matthew R.; Belton, Mark; Nemcek, Nina; Fraser, Tamara; Wietzke, Jasmine (2022). Discrete profile measurements of dissolved inorganic carbon (DIC), total alkalinity (TA), salinity, oxygen, nutrients, and temperature during the CCGS John P. Tully cruise 2019.23 (EXPOCODE 18DD20190829) in the Salish Sea and off the west coast of Vancouver Island of the North American Pacific coast from 2019-08-29 to 2019-09-06 (NCEI Accession 0252614). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/5fza-nj73. 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	2022-04-26T19:05:34Z - NCEI Accession 0252614 v1.1 was published.
Output Datasets	NCEI Accession 0252614 v1.1 NCEI Accession 0252614 v1.1 (download) published 2022-04-26T19:05:34Z

Lineage information for: dataset
Processing Steps	Parameter or Variable: Dissolved Inorganic Carbon; Abbreviation: DIC; Unit: µmol/kg; Observation type: profile; In-situ / Manipulation / Response variable: in-situ observation; Sampling instrument: Rosette; Niskin 10L; Analyzing instrument: VINDTA along with a 5011 or 5017 Coulometer; Detailed sampling and analyzing information: Seawater samples were collected from standard depths in 500 mL borosilicate glass reagent bottles. 5 mL of water was removed to allow room for thermal expansion and the sample was preserved within 30 minutes of collection with 0.2 mL of a mercuric chloride saturated solution; then sealed with Apiezon M grease and the ground glass stoppers secured in place with electrical tape. The samples were stored in cold storage on-ship and on-shore before on-shore laboratory analysis. The samples were analysed for DIC using a VINTA 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 daily duplicate CRM measurements.; Replicate information: 22%; Standardization description: Referenced to duplicate measurements of a CRM before each daily batch of samples; Standardization frequency: Daily; CRM manufacturer: Andrew Dickson; Scripps Oceanographic Institute; CRM batch number: 178; Preservation method: Mercuric chloride saturated solution; Preservative volume: 200 uL per 500 ml sample bottle = 0.04%; Preservative correction: 1.0004; Uncertainty: 6; Quality flag convention: Updated WOCE QC flags; 0 = Interpolated data; 1 = Not evaluated/quality unknown; 2 = Acceptable; 3 = Questionable; 4 = Known bad; 6 = Median of replicates; 9 = Missing value; 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; Chapter 4; SOP 2; Researcher name: Marty Davelaar; Danielle Caleb; Researcher institution: Institute of Ocean Sciences Parameter or Variable: Total alkalinity; Abbreviation: TA; Unit: µmol/kg; Observation type: profile; In-situ / Manipulation / Response variable: in-situ observation; Calculation method and parameters: Titration curves were fit with the Python Calkulate package (Humphreys and Matthews, 2022, https://doi.org/10.5281/zenodo.2634304) and the following constants: k_bisulfate - Dickson and Riley (1990); k_carbonic - Lueker et al. (2000); k_fluoride - Perez & Fraga (1987); tot_borate - Uppstrom (1974).; Sampling instrument: Rosette; Niskin bottle 10 L; Analyzing instrument: In-house automated sampler with Metrohm Dosimat 665 and LabView TM software; Type of titration: Potentiometric multi point titration; Cell type (open or closed): open; Detailed sampling and analyzing information: Seawater samples were collected from standard depths in 500 mL borosilicate glass reagent bottles. 5 mL of water was removed to allow room for thermal expansion and the sample was preserved within 30 minutes of collection with 0.2 mL of a mercuric chloride saturated solution; then sealed with Apiezon M grease and the ground glass stoppers secured in place with electrical tape. The samples were stored in cold stoage on-ship and on-shore until on-shore laboratory analysis. TA in the sample was determined using an open cell automated potentiometric titration with a Metrohm Dosimat 665 dosing unit controlled by LabView TM 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 using daily duplicate CRM measurements. TA measurements were made from the same bottle sample as DIC after DIC had been measured.; Replicate information: 22%; Standardization description: Referenced to duplicate measurements of a CRM before each daily batch of samples; Standardization frequency: Daily; CRM manufacturer: Andrew Dickson; Scripps Oceanographic Institute; CRM batch number: 178; Preservation method: Mercuric chloride saturated solution; Preservative volume: 200 uL per 500 ml sample bottle = 0.04%; Preservative correction: 1.0004; Uncertainty: 5; Quality flag convention: Updated WOCE QC flags; 0 = Interpolated data; 1 = Not evaluated/quality unknown; 2 = Acceptable; 3 = Questionable; 4 = Known bad; 6 = Median of replicates; 9 = Missing value; 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; Chapter 4; SOP 3b; Researcher name: Marty Davelaar; Danielle Caleb, Paul A. Covert; Researcher institution: Institute of Ocean Sciences Parameter or Variable: CTD Pressure; Abbreviation: CTDPRS; Unit: dbar; Observation type: Profile; Sampling instrument: Sea-Bird CTD SBE-911plus; Researcher name: Akash Sastri, Germaine Gatien; Researcher institution: Institute of Ocean Sciences Parameter or Variable: CTD Temperature; Abbreviation: CTDTMP; Unit: Degrees C; Observation type: Profile; Sampling instrument: Sea-Bird CTD SBE-911plus; Researcher name: Akash Sastri, Germaine Gatien; Researcher institution: Institute of Ocean Sciences Parameter or Variable: CTD Salinity; Abbreviation: CTDSAL; Unit: PSS78; Observation type: Profile; Sampling instrument: Sea-Bird CTD SBE-911plus; Researcher name: Akash Sastri, Germaine Gatien; Researcher institution: Institute of Ocean Sciences Parameter or Variable: Bottle Salinity; Abbreviation: SALINITY; Unit: PSS78; Observation type: Profile; Sampling instrument: Niskin bottle 10 L; Analyzing instrument: Guildline 8400B Salinometer (S/N 68572); Detailed sampling and analyzing information: Salinity samples were collected in 200 mL type ll glass bottles with disposable plastic inserts and screw caps supplied by Ocean Scientific International Limited. They were analyzed in a temperature-controlled lab on a Guildline 8400B Salinometer (S/N 68572) standardized with IAPSO standard seawater.; Quality flag convention: Updated WOCE QC flags; 0 = Interpolated data; 1 = Not evaluated/quality unknown; 2 = Acceptable; 3 = Questionable; 4 = Known bad; 6 = Median of replicates; 9 = Missing value; Researcher name: Jasmine Wietzke; Researcher institution: Institute of Ocean Sciences Parameter or Variable: Dissolved Oxygen; Abbreviation: OXYGEN; Unit: µmol/kg; Observation type: Profile; Sampling instrument: Niskin bottle 10 L; Analyzing instrument: Metrohm Dosimat model 665 for titrations; Dosimat model 865 for dispensing standards and a PC950 Colorimeter controlled by AutoOxy software V3.4; Detailed sampling and analyzing information: Oxygen samples were analyzed at sea using an automated Winkler titration system with modifications based on Carpenter (1965) and adhering to WOCE protocols; Quality flag convention: Updated WOCE QC flags; 0 = Interpolated data; 1 = Not evaluated/quality unknown; 2 = Acceptable; 3 = Questionable; 4 = Known bad; 6 = Median of replicates; 9 = Missing value; Method reference: Carpenter; J.H. 1965. The Chesapeake Bay Institute Technique for the Winkler Dissolved Oxygen Method. Limmnol. & Oceanogr.; 10: 141-143 Culberson; C.H. 1991. Dissolved oxygen. WOCE Hydrographic Programme Operations and Methods (July 1991). 15pp.); Researcher name: Mark Belton; Nina Nemcek; Kenny Scozzafava; Researcher institution: Institute of Ocean Sciences Parameter or Variable: Nitrate plus Nitrite; Abbreviation: NITRATE_NITRITE; Unit: µmol/kg; Observation type: Profile; Sampling instrument: Niskin bottle 10 L; Analyzing instrument: Astoria analyzer; Detailed sampling and analyzing information: Nutrient samples were collected in plastic tubes and quick frozen in aluminum blocks stored in a -20C freezer. All analysis was performed on frozen samples.; Quality flag convention: Updated WOCE QC flags; 0 = Interpolated data; 1 = Not evaluated/quality unknown; 2 = Acceptable; 3 = Questionable; 4 = Known bad; 6 = Median of replicates; 9 = Missing value; Method reference: Barwell-Clarke; J. and Whitney; F. 1996. Institute of Ocean Sciences Nutrient Methods and Analysis. Canadian Technical Report of Hydrography and Ocean Sciences; No. 182; 43 pp.; Researcher name: Mark Belton; Researcher institution: Institute of Ocean Sciences Parameter or Variable: Silicic acid; Abbreviation: SILICATE; Unit: µmol/kg; Observation type: Profile; Sampling instrument: Niskin bottle 10 L; Analyzing instrument: Astoria analyzer; Detailed sampling and analyzing information: Nutrient samples were collected in plastic tubes and quick frozen in aluminum blocks stored in a -20C freezer. All analysis was performed on frozen samples; Quality flag convention: Updated WOCE QC flags; 0 = Interpolated data; 1 = Not evaluated/quality unknown; 2 = Acceptable; 3 = Questionable; 4 = Known bad; 6 = Median of replicates; 9 = Missing value; Method reference: Barwell-Clarke; J. and Whitney; F. 1996. Institute of Ocean Sciences Nutrient Methods and Analysis. Canadian Technical Report of Hydrography and Ocean Sciences; No. 182; 43 pp.; Researcher name: Mark Belton; Researcher institution: Institute of Ocean Sciences Parameter or Variable: Phosphate; Abbreviation: PHOSPHATE; Unit: µmol/kg; Observation type: Profile; Sampling instrument: Niskin bottle 10 L; Analyzing instrument: Astoria analyzer; Detailed sampling and analyzing information: Nutrient samples were collected in plastic tubes and quick frozen in aluminum blocks stored in a -20C freezer. All analysis was performed on frozen samples; Quality flag convention: Updated WOCE QC flags; 0 = Interpolated data; 1 = Not evaluated/quality unknown; 2 = Acceptable; 3 = Questionable; 4 = Known bad; 6 = Median of replicates; 9 = Missing value; Method reference: Barwell-Clarke; J. and Whitney; F. 1996. Institute of Ocean Sciences Nutrient Methods and Analysis. Canadian Technical Report of Hydrography and Ocean Sciences; No. 182; 43 pp.; Researcher name: Mark Belton; Researcher institution: Institute of Ocean Sciences Parameter or Variable: Ammonium; Abbreviation: AMMONIUM; Unit: µmol/kg; Observation type: Profile; Sampling instrument: Niskin bottle 10 L; Analyzing instrument: TD 700 Fluorometer; Detailed sampling and analyzing information: The ammonium method used at IOS is a simplification of the fluorometric technique of Holmes et al, 1999. This method applies to a wide range of ammonium concentrations, uses the addition of a single working reagent and reduces contamination. Typically, samples are collected during the day and stored in the cold room. The working reagent is added to standards and samples at the same time, and the fluorescence is read approximately 8 hours later using a calibrated TD 700 Fluorometer. Standards are made in LNSW colelcted at 250 m stn LB14; Quality flag convention: Updated WOCE QC flags; 0 = Interpolated data; 1 = Not evaluated/quality unknown; 2 = Acceptable; 3 = Questionable; 4 = Known bad; 6 = Median of replicates; 9 = Missing value; Method reference: Holmes, R.M., Aminot, A., Kerouel, R., Hooker, B.A., and Peterson, B.J. (1999) A simple and precise method for measuring ammonium in marine and freshwater ecosystems. Can. J. Fish. Aquat. Sci., 56 1801-1808.; Researcher name: Nina Nemcek; Mark Belton; Researcher institution: Institute of Ocean Sciences

Lineage information for: dataset

Processing Steps

Parameter or Variable: Dissolved Inorganic Carbon; Abbreviation: DIC; Unit: µmol/kg; Observation type: profile; In-situ / Manipulation / Response variable: in-situ observation; Sampling instrument: Rosette; Niskin 10L; Analyzing instrument: VINDTA along with a 5011 or 5017 Coulometer; Detailed sampling and analyzing information: Seawater samples were collected from standard depths in 500 mL borosilicate glass reagent bottles. 5 mL of water was removed to allow room for thermal expansion and the sample was preserved within 30 minutes of collection with 0.2 mL of a mercuric chloride saturated solution; then sealed with Apiezon M grease and the ground glass stoppers secured in place with electrical tape. The samples were stored in cold storage on-ship and on-shore before on-shore laboratory analysis. The samples were analysed for DIC using a VINTA 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 daily duplicate CRM measurements.; Replicate information: 22%; Standardization description: Referenced to duplicate measurements of a CRM before each daily batch of samples; Standardization frequency: Daily; CRM manufacturer: Andrew Dickson; Scripps Oceanographic Institute; CRM batch number: 178; Preservation method: Mercuric chloride saturated solution; Preservative volume: 200 uL per 500 ml sample bottle = 0.04%; Preservative correction: 1.0004; Uncertainty: 6; Quality flag convention: Updated WOCE QC flags; 0 = Interpolated data; 1 = Not evaluated/quality unknown; 2 = Acceptable; 3 = Questionable; 4 = Known bad; 6 = Median of replicates; 9 = Missing value; 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; Chapter 4; SOP 2; Researcher name: Marty Davelaar; Danielle Caleb; Researcher institution: Institute of Ocean Sciences
Parameter or Variable: Total alkalinity; Abbreviation: TA; Unit: µmol/kg; Observation type: profile; In-situ / Manipulation / Response variable: in-situ observation; Calculation method and parameters: Titration curves were fit with the Python Calkulate package (Humphreys and Matthews, 2022, https://doi.org/10.5281/zenodo.2634304) and the following constants: k_bisulfate - Dickson and Riley (1990); k_carbonic - Lueker et al. (2000); k_fluoride - Perez & Fraga (1987); tot_borate - Uppstrom (1974).; Sampling instrument: Rosette; Niskin bottle 10 L; Analyzing instrument: In-house automated sampler with Metrohm Dosimat 665 and LabView TM software; Type of titration: Potentiometric multi point titration; Cell type (open or closed): open; Detailed sampling and analyzing information: Seawater samples were collected from standard depths in 500 mL borosilicate glass reagent bottles. 5 mL of water was removed to allow room for thermal expansion and the sample was preserved within 30 minutes of collection with 0.2 mL of a mercuric chloride saturated solution; then sealed with Apiezon M grease and the ground glass stoppers secured in place with electrical tape. The samples were stored in cold stoage on-ship and on-shore until on-shore laboratory analysis. TA in the sample was determined using an open cell automated potentiometric titration with a Metrohm Dosimat 665 dosing unit controlled by LabView TM 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 using daily duplicate CRM measurements. TA measurements were made from the same bottle sample as DIC after DIC had been measured.; Replicate information: 22%; Standardization description: Referenced to duplicate measurements of a CRM before each daily batch of samples; Standardization frequency: Daily; CRM manufacturer: Andrew Dickson; Scripps Oceanographic Institute; CRM batch number: 178; Preservation method: Mercuric chloride saturated solution; Preservative volume: 200 uL per 500 ml sample bottle = 0.04%; Preservative correction: 1.0004; Uncertainty: 5; Quality flag convention: Updated WOCE QC flags; 0 = Interpolated data; 1 = Not evaluated/quality unknown; 2 = Acceptable; 3 = Questionable; 4 = Known bad; 6 = Median of replicates; 9 = Missing value; 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; Chapter 4; SOP 3b; Researcher name: Marty Davelaar; Danielle Caleb, Paul A. Covert; Researcher institution: Institute of Ocean Sciences
Parameter or Variable: CTD Pressure; Abbreviation: CTDPRS; Unit: dbar; Observation type: Profile; Sampling instrument: Sea-Bird CTD SBE-911plus; Researcher name: Akash Sastri, Germaine Gatien; Researcher institution: Institute of Ocean Sciences
Parameter or Variable: CTD Temperature; Abbreviation: CTDTMP; Unit: Degrees C; Observation type: Profile; Sampling instrument: Sea-Bird CTD SBE-911plus; Researcher name: Akash Sastri, Germaine Gatien; Researcher institution: Institute of Ocean Sciences
Parameter or Variable: CTD Salinity; Abbreviation: CTDSAL; Unit: PSS78; Observation type: Profile; Sampling instrument: Sea-Bird CTD SBE-911plus; Researcher name: Akash Sastri, Germaine Gatien; Researcher institution: Institute of Ocean Sciences
Parameter or Variable: Bottle Salinity; Abbreviation: SALINITY; Unit: PSS78; Observation type: Profile; Sampling instrument: Niskin bottle 10 L; Analyzing instrument: Guildline 8400B Salinometer (S/N 68572); Detailed sampling and analyzing information: Salinity samples were collected in 200 mL type ll glass bottles with disposable plastic inserts and screw caps supplied by Ocean Scientific International Limited. They were analyzed in a temperature-controlled lab on a Guildline 8400B Salinometer (S/N 68572) standardized with IAPSO standard seawater.; Quality flag convention: Updated WOCE QC flags; 0 = Interpolated data; 1 = Not evaluated/quality unknown; 2 = Acceptable; 3 = Questionable; 4 = Known bad; 6 = Median of replicates; 9 = Missing value; Researcher name: Jasmine Wietzke; Researcher institution: Institute of Ocean Sciences
Parameter or Variable: Dissolved Oxygen; Abbreviation: OXYGEN; Unit: µmol/kg; Observation type: Profile; Sampling instrument: Niskin bottle 10 L; Analyzing instrument: Metrohm Dosimat model 665 for titrations; Dosimat model 865 for dispensing standards and a PC950 Colorimeter controlled by AutoOxy software V3.4; Detailed sampling and analyzing information: Oxygen samples were analyzed at sea using an automated Winkler titration system with modifications based on Carpenter (1965) and adhering to WOCE protocols; Quality flag convention: Updated WOCE QC flags; 0 = Interpolated data; 1 = Not evaluated/quality unknown; 2 = Acceptable; 3 = Questionable; 4 = Known bad; 6 = Median of replicates; 9 = Missing value; Method reference: Carpenter; J.H. 1965. The Chesapeake Bay Institute Technique for the Winkler Dissolved Oxygen Method. Limmnol. & Oceanogr.; 10: 141-143 Culberson; C.H. 1991. Dissolved oxygen. WOCE Hydrographic Programme Operations and Methods (July 1991). 15pp.); Researcher name: Mark Belton; Nina Nemcek; Kenny Scozzafava; Researcher institution: Institute of Ocean Sciences
Parameter or Variable: Nitrate plus Nitrite; Abbreviation: NITRATE_NITRITE; Unit: µmol/kg; Observation type: Profile; Sampling instrument: Niskin bottle 10 L; Analyzing instrument: Astoria analyzer; Detailed sampling and analyzing information: Nutrient samples were collected in plastic tubes and quick frozen in aluminum blocks stored in a -20C freezer. All analysis was performed on frozen samples.; Quality flag convention: Updated WOCE QC flags; 0 = Interpolated data; 1 = Not evaluated/quality unknown; 2 = Acceptable; 3 = Questionable; 4 = Known bad; 6 = Median of replicates; 9 = Missing value; Method reference: Barwell-Clarke; J. and Whitney; F. 1996. Institute of Ocean Sciences Nutrient Methods and Analysis. Canadian Technical Report of Hydrography and Ocean Sciences; No. 182; 43 pp.; Researcher name: Mark Belton; Researcher institution: Institute of Ocean Sciences
Parameter or Variable: Silicic acid; Abbreviation: SILICATE; Unit: µmol/kg; Observation type: Profile; Sampling instrument: Niskin bottle 10 L; Analyzing instrument: Astoria analyzer; Detailed sampling and analyzing information: Nutrient samples were collected in plastic tubes and quick frozen in aluminum blocks stored in a -20C freezer. All analysis was performed on frozen samples; Quality flag convention: Updated WOCE QC flags; 0 = Interpolated data; 1 = Not evaluated/quality unknown; 2 = Acceptable; 3 = Questionable; 4 = Known bad; 6 = Median of replicates; 9 = Missing value; Method reference: Barwell-Clarke; J. and Whitney; F. 1996. Institute of Ocean Sciences Nutrient Methods and Analysis. Canadian Technical Report of Hydrography and Ocean Sciences; No. 182; 43 pp.; Researcher name: Mark Belton; Researcher institution: Institute of Ocean Sciences
Parameter or Variable: Phosphate; Abbreviation: PHOSPHATE; Unit: µmol/kg; Observation type: Profile; Sampling instrument: Niskin bottle 10 L; Analyzing instrument: Astoria analyzer; Detailed sampling and analyzing information: Nutrient samples were collected in plastic tubes and quick frozen in aluminum blocks stored in a -20C freezer. All analysis was performed on frozen samples; Quality flag convention: Updated WOCE QC flags; 0 = Interpolated data; 1 = Not evaluated/quality unknown; 2 = Acceptable; 3 = Questionable; 4 = Known bad; 6 = Median of replicates; 9 = Missing value; Method reference: Barwell-Clarke; J. and Whitney; F. 1996. Institute of Ocean Sciences Nutrient Methods and Analysis. Canadian Technical Report of Hydrography and Ocean Sciences; No. 182; 43 pp.; Researcher name: Mark Belton; Researcher institution: Institute of Ocean Sciences
Parameter or Variable: Ammonium; Abbreviation: AMMONIUM; Unit: µmol/kg; Observation type: Profile; Sampling instrument: Niskin bottle 10 L; Analyzing instrument: TD 700 Fluorometer; Detailed sampling and analyzing information: The ammonium method used at IOS is a simplification of the fluorometric technique of Holmes et al, 1999. This method applies to a wide range of ammonium concentrations, uses the addition of a single working reagent and reduces contamination. Typically, samples are collected during the day and stored in the cold room. The working reagent is added to standards and samples at the same time, and the fluorescence is read approximately 8 hours later using a calibrated TD 700 Fluorometer. Standards are made in LNSW colelcted at 250 m stn LB14; Quality flag convention: Updated WOCE QC flags; 0 = Interpolated data; 1 = Not evaluated/quality unknown; 2 = Acceptable; 3 = Questionable; 4 = Known bad; 6 = Median of replicates; 9 = Missing value; Method reference: Holmes, R.M., Aminot, A., Kerouel, R., Hooker, B.A., and Peterson, B.J. (1999) A simple and precise method for measuring ammonium in marine and freshwater ecosystems. Can. J. Fish. Aquat. Sci., 56 1801-1808.; Researcher name: Nina Nemcek; Mark Belton; Researcher institution: Institute of Ocean Sciences

Acquisition Information (collection)
Instrument	bottle CTD
Platform	JOHN P. TULLY

Last Modified: 2026-05-06T13:13:44Z
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