Processing Steps |
- Parameter or Variable: Dissolved Inorganic Carbon; Abbreviation: TC2; Unit: umol/kg; Observation type: surface only or profile discrete sampling; In-situ / Manipulation / Response variable: In-situ; Measured or calculated: Measured; Sampling instrument: Niskin bottle or laboratory collection, depending on project; Analyzing instrument: CM5014 UIC Coulometer; Detailed sampling and analyzing information: High and low concentrations of sodium carbonate were used to calibrate the Coulometer, and a slope calibration factor was applied to each inorganic carbon value (Goyet and Hacker 1992). Calculations were completed in Excel; CRM manufacturer: Andrew Dickson's lab at Scripps Institute of Oceanography; CRM batch number: CRM 102, 104, 111, 114, 117, 120; Preservation method: Mercuric chloride in some but not all samples; Preservative volume: 0.02% by volume; Uncertainty: Typical precision and accuracy were 0.9% and 0.5%, respectively; Method reference: Dickson et al 2007; Researcher name: Dr. Lawra Vanderhoof, Dr. Lawrence Shaufler; Researcher institution: NMFS/AFSC Auke Bay (AFSC/ABL).
- Parameter or Variable: Total alkalinity; Abbreviation: TA; Unit: umol/kg; Observation type: surface only or profile discrete sampling; In-situ / Manipulation / Response variable: In-situ; Measured or calculated: Measured; Calculation method and parameters: Calculations were completed in Excel using methods of Dickson et al. 2007; Sampling instrument: Niskin; Analyzing instrument: Alkalinity titrator; Metrohm Dosimat autopipette (through August 2011) and thereafter with a QC Titration Module on a TitraSip System (Mantech Associates Inc).; Type of titration: Potentiometric; Cell type (open or closed): Open; Curve fitting method: Non-linear least squares; CRM manufacturer: Andrew Dickson's lab at Scripps Institute of Oceanography; CRM batch number: CRM 102, 104, 111, 114, 117, 120; Preservation method: Mercuric chloride in some but not all samples; Preservative volume: 0.02% by volume; Uncertainty: Typical precision was 3.6% with the Dosimat and 0.5% with the Mantech. Typical accuracy was plus/minus 1.3% with the Dosimat and 0.7% with the Mantech.; Method reference: Open cell titration method from 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: Dr. Lawra Vanderhoof, Dr. Lawrence Shaufler; Researcher institution: NMFS/AFSC Auke Bay (AFSC/ABL).
- Parameter or Variable: pH; Abbreviation: pH; pH scale: Total; Observation type: surface only or profile discrete sampling; In-situ / Manipulation / Response variable: In-situ; Measured or calculated: Measured; Sampling instrument: Niskin; Analyzing instrument: Aligent Technologies Model 8453 UV/visible spectrophotometer; Temperature of pH measurement: 25 C; Detailed sampling and analyzing information: Aligent 8453, M-cresol purple Lot #; At what temperature was pH reported: Environmental; Uncertainty: Values were not corrected for the dye; Method reference: Used spectrometric method from 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: Dr. Lawra Vanderhoof, Dr. Lawrence Shaufler; Researcher institution: NMFS/AFSC Auke Bay (AFSC/ABL).
- Parameter or Variable: Chlorophyll A concentration in seawater (ug/L); Abbreviation: ChlA; Unit: ug/L; Observation type: surface only or profile discrete sampling; In-situ / Manipulation / Response variable: In-situ; Measured or calculated: measured; Sampling instrument: Niskin; Analyzing instrument: Turner Designs Model TD 700 fluorometer or Cary Eclipse spectrofluorometer (2012-2013).; Method reference: Parsons Maita et al 1984; Researcher name: Dr. Lawrence Shaufler; Researcher institution: NMFS/AFSC Auke Bay (AFSC/ABL).
- Parameter or Variable: Phosphate; Abbreviation: Phosphate; Unit: uM; Observation type: surface only or profile discrete sampling; In-situ / Manipulation / Response variable: in-situ; Measured or calculated: measured; Sampling instrument: Niskin; Analyzing instrument: Spectrophotometer; Uncertainty: Typical precision was 2.8% and typical accuracy was 10%; Method reference: Bernhardt and Wilhelms 1967; Researcher name: Dr. Katherine A. Krogslund; Researcher institution: Oceanography Technical Services, University of Washington.
- Parameter or Variable: silicate; Abbreviation: Silicate; Unit: uM; Observation type: surface only or profile discrete sampling; In-situ / Manipulation / Response variable: In-situ; Measured or calculated: measured; Sampling instrument: Niskin; Analyzing instrument: Spectrophotometer; Uncertainty: Typical precision was 0.5% and typical accuracy was 3%; Method reference: Armstrong et al 1967; Researcher name: Dr. Katherine A. Krogslund; Researcher institution: Oceanography Technical Services, University of Washington.
- Parameter or Variable: nitrate; Abbreviation: Nitrate; Unit: uM; Observation type: surface only or profile discrete sampling; In-situ / Manipulation / Response variable: in-situ; Measured or calculated: measured; Sampling instrument: Niskin; Analyzing instrument: Spectrophotometer; Uncertainty: Typical precision was 1.5% and typical accuracy was 7%; Method reference: Armstrong et al 1967; Researcher name: Dr. Katherine A. Krogslund; Researcher institution: Oceanography Technical Services, University of Washington.
- Parameter or Variable: Nitrite; Abbreviation: Nitrite; Unit: uM; Observation type: surface only or profile discrete sampling; In-situ / Manipulation / Response variable: in-situ; Measured or calculated: measured; Sampling instrument: Niskin; Analyzing instrument: Spectrophotometer; Uncertainty: Typical precision was 2.8% and typical accuracy was 6%; Method reference: Armstrong et al 1967; Researcher name: Dr. Katherine A. Krogslund; Researcher institution: Oceanography Technical Services, University of Washington.
- Parameter or Variable: Ammonium; Abbreviation: Ammonium; Observation type: surface only or profile discrete sampling; In-situ / Manipulation / Response variable: in-situ; Measured or calculated: measured; Analyzing instrument: Spectrophotometer; Uncertainty: Typical precision was 4.1% and typical accuracy was 4%; Method reference: Armstrong et al 1967; Researcher name: Dr. Katherine A. Krogslund; Researcher institution: Oceanography Technical Services, University of Washington.
- Parameter or Variable: Salinity; Abbreviation: Salinity; Unit: psu (practical salinity scale); Observation type: surface only or profile discrete sampling; In-situ / Manipulation / Response variable: In-situ; Measured or calculated: measured; Sampling instrument: Niskin; Analyzing instrument: Model 8400B AutoSal analyzer (Guildline Instruments Limited); Uncertainty: Typical precision and accuracy were 0.2% and 0.1%, respectively.; Researcher name: Dr. Lawrence Shaufler; Researcher institution: NMFS/AFSC Auke Bay (AFSC/ABL) .
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