Processing Steps |
- Parameter or Variable: Dissolved Inorganic Carbon; Abbreviation: DIC_umol/kg; Unit: umol/kg; Observation type: discrete water sample; In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: Measured; Sampling instrument: Niskin bottle, stored in borosilicate bottle (125mL, 600mL); Analyzing instrument: Apollo Sci-tech DIC Analyzer, model no. AS-C3; Detailed sampling and analyzing information: Measurements drawn according to procedures in the Guide to best practices for ocean CO2 measurements (Dickson et al., 2007). Borosilicate bottle were rinsed and filled from bottom, leaving a minimal amount of headspace while making sure no bubbles were introduced. Then 200uL of saturated HgCl2 solution was added, bottles were sealed with glass stoppers lightly covered with Apiezon-L grease, and were stored at room temperature to be sent back to the lab for analysis on the Apollo Sci-tech DIC Analyzer.; Replicate information: duplicate samples analyzed; Standardization description: Duplicate samples are run in addition to Certified Reference Material (CRM), supplied by Dr. A. Dickson of UCSD; Standardization frequency: Along with duplicate samples being run throughout, CRMs are run at the beginning to generate offset value and at the end to assess drift; CRM manufacturer: Andrew Dickson's lab at Scripps Institute of Oceanography; CRM batch number: CRM 140, 150, 157, 164; Preservation method: saturated Mercury (II) Chloride (HgCl2); Preservative volume: 200uL; Uncertainty: ±2 umol/kg; 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.; Researcher name: Ian Enochs; Researcher institution: Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration.
- Parameter or Variable: Total alkalinity; Abbreviation: TA_umol/kg; Unit: umol/kg; Observation type: discrete water sample; In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: Measured; Sampling instrument: Niskin bottle, stored in borosilicate bottle (125mL, 600mL); Analyzing instrument: Apollo Sci-tech Alkalinity Titrator, model no. AS-ALK2; Type of titration: Gran titration; Cell type (open or closed): open; Detailed sampling and analyzing information: Samples run using remaining water from the same sample bottles used for DIC. Refer to DIC for more information on sampling and conservation of samples. Water samples were titrated with 0.11M HCl solution.; Replicate information: 500-ml sets of duplicate samples; Standardization description: Duplicate samples are run in addition to Certified Reference Material (CRM), supplied by Dr. A. Dickson of UCSD; Standardization frequency: Along with duplicate samples being run throughout, CRMs are run at the beginning to generate offset value; CRM manufacturer: Andrew Dickson's lab at Scripps Institute of Oceanography; CRM batch number: CRM 140, 150, 157, 164; Preservation method: saturated Mercury (II) Chloride (HgCl2); Preservative volume: 200uL; Uncertainty: ± 1-2 umol/kg; 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.; Researcher name: Ian Enochs; Researcher institution: Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration.
- Parameter or Variable: pH; Abbreviation: pH_calculated; pH scale: Total scale (T); Observation type: discrete water sample; In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: Calculated; Sampling instrument: Niskin bottle, stored in borosilicate bottle (125mL, 600mL); Detailed sampling and analyzing information: Same sample bottle for pH, DIC and TA analyses. Refer to DIC for more information on sampling and conservation of samples.; Replicate information: 500-ml sets of duplicate samples; At what temperature was pH reported: temperature during analysis (25C); Method reference: Pierrot, D. E. Lewis,and D. W. R. Wallace. 2006. MS Excel Program Developed for.
- Parameter or Variable: pCO2 (fCO2) discrete; Abbreviation: pCO2_uatm; Unit: uatm; Observation type: discrete water sample; In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: Calculated; Sampling instrument: Niskin bottle, stored in borosilicate bottle (125mL, 600mL); Storage method: Borosilicate bottle; Seawater volume: 500; Headspace volume: 5 mL; Detailed sampling and analyzing information: Same sample bottle for pCO2, pH, DIC, and TA analyses. Refer to DIC for more information on sampling and conservation of samples.; Sample replicate information: 500-ml sets of duplicate samples; Method reference: Pierrot, D. E. Lewis,and D. W. R. Wallace. 2006. MS Excel Program Developed for.
- Parameter or Variable: Temperature measured during sample collection in degrees Celsius; Abbreviation: Temperature_C; Unit: °C; Observation type: surface measurement; In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: measured; Sampling instrument: Borosilicate bottle; Analyzing instrument: YSI EcoSense EC300A portable conductivity, salinity, and temperature instrument; Detailed sampling and analyzing information: Model EC300A; Researcher name: Ian Enochs; Researcher institution: Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration.
- Parameter or Variable: Salinity calculated from density measurement; Abbreviation: Salinity_Bottle; Unit: psu; Observation type: surface measurement; In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: calculated; Sampling instrument: Niskin bottle, stored in borosilicate bottle (125mL, 600mL); Analyzing instrument: Densitometer, Anton Paar DMA XXX; Detailed sampling and analyzing information: These salinity data represent the best available data for the site in question. 1mL of original seawater sample used for density analysis. Salinity then calculated using density and temperature of sample at time of density measurement through use of the UNESCO Equation of State of Seawater; Researcher name: Ian Enochs; Researcher institution: Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration.
- Parameter or Variable: Depth in meters; Abbreviation: Sample_Depth_m; Unit: m; In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: measured; Sampling instrument: depth gauge; Researcher name: Ian Enochs; Researcher institution: Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration.
- Parameter or Variable: Aragonite saturation state; Abbreviation: Aragonite_Sat_W; In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: calculated; Sampling instrument: Niskin bottle, stored in borosilicate bottle (125mL, 600mL); Detailed sampling and analyzing information: Same sample bottle for pCO2, pH, DIC, and TA analyses. Refer to DIC for more information on sampling and conservation of samples.; Replicate information: 500-ml sets of duplicate samples; Method reference: Pierrot, D. E. Lewis,and D. W. R. Wallace. 2006. MS Excel Program Developed for.
- Parameter or Variable: Spectrophotometric pH; Abbreviation: pH_measured; Unit: Total Scale pH units; In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: measured; Sampling instrument: Niskin bottle, stored in borosilicate bottle (125mL, 600mL); Analyzing instrument: Agilent Cary 8454 UV-Vis Spectrophotometer; Detailed sampling and analyzing information: Same sample bottle for pCO2, pH, DIC, and TA analyses. Refer to DIC for more information on sampling and conservation of samples.; Replicate information: 500-ml sets of duplicate samples; Uncertainty: ±0.005 pH units; Method reference: Pierrot, D. E. Lewis,and D. W. R. Wallace. 2006. MS Excel Program Developed for .
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