OCEAN CDIAC's Ocean CO2 Data Program
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Search Criteria: dataset_idText : WOCE_P17C AND ( datasource :( oceanbt ) )


Dataset_ID: WOCE_P17C
Investigator(s) Name: Goyet, Catherine
Organization: Universite de Perpignan, B't. B., BDSI,
Address: 52 avenue Paul Alduy, 66860 Perpignan, France
Phone: +33 468 66 2087
Email: cgoyet@univ-perp.fr
Dataset Info:Dataset ID:WOCE_P17C
Submission Dates: Initial Submission: 20040614
Revised Submission: 20040614
Cruise Info:
  • Experiment:
    1. Experiment Name: WOCE
Cruise:
  • Cruise ID: 31WTTUNES_1
  • Section: WOCE_P17C
  • Geographical Coverage:
    1. Geographical Region: Pacific Ocean
Bounds:
NorthWestSouthEast
37.14-138.37-8.05-118.36


Temporal Coverage: Start Date: 19910531 End Date: 19910711
Vessel:Vessel Name:R/V T. Washington
Vessel ID:31WT
Country:
Vessel Owner:
Data Center URL: http://cdiac.esd.ornl.gov/
Download Data Sets: Discrete measurements from WOCE P17C Section

Variable Info: downup
Variable NameDescription of Variable
CTD PressureDBAR
CTD Temperature
CTD Salinity
Bottle Salinity
CTD OxygenUMOL/KG
Bottle OxygenUMOL/KG
SilicateUMOL/KG
NitrateUMOL/KG
NitriteUMOL/KG
PhosphateUMOL/KG
CFC-11PMOL/KG
CFC-12PMOL/KG
delta C14/MILLE
delta C13/MILLE
TCO2UMOL/KG
TALKUMOL/KG
C14 Error/MILLE
Method Description:
  • Total C02 Data:
    1. TCO2 Analysis Method: TCO2 concentration was measured by semiautomated coulometry, using an improved version of the instrument earlier described by Johnson et al. (1985, 1987). This early SOMMA-type system did not have gas loops for calibration. Consequently, plans were to calibrate the system with standard solutions prepared as described in Goyet and Hacker (1992); however, these standard solutions could not be prepared on board during the cruise. The certified reference materials were used as standards to calibrate the TCO2 extraction/coulometer system.
    2. Standardization Technique:
      1. Technique Description:
      2. Sample Volume: 250 mL
      3. CRM Info:
        1. Correction Magnitude:
        2. Batch Number:
        3. CRM Analysis Info:
    3. Field Replicate Info: The replicate samples from 56 Niskin bottles at 18 stations were collected for shore-based reference analyses at the laboratory of C. D. Keeling of SIO. The TCO2 measurements were produced by vacuum-extraction/manometric analysis, and the TALK values, by potentiometric titration. Both measurements were performed under controlled laboratory conditions using standards. The replicate sample standard deviation (s) for this large data set of 50 unflagged pairs is 1.9 µmol/kg after the three replicate pairs with deltas greater then 3s (a replicate sample standard deviation calculated from the set of analyses on duplicate samples) were omitted (Guenther et al. 1994).
    4. Poisoning Info: Poisoned with 50 µL of a saturated solution of mercuric chloride (HgCl2). 50 µL
      1. Poisoning Correction Description: Poisoned with 50 µL of a saturated solution of mercuric chloride (HgCl2).
      2. Poison Volume: 50 µL
    5. Accuracy Info: Precision of the measurements was estimated to be better than ±3 µmol/kg; the desired accuracy was better than ±4 µmol/kg.
    6. Method References: Johnson, K. M., A. E. King, and J. M. Sieburth. 1985. Coulometric TCO2 analyses for marine studies: An introduction. Marine Chemistry 16:61-82.Johnson, K. M., J. M. Sieburth, P. J. Williams, and L. Brandstrom. 1987. Coulometric total carbon dioxide analysis for marine studies: Automation and calibration. Marine Chemistry 21:117-33.Goyet, C., and S. D. Hacker. 1992. Procedure for calibration of a coulometric system used for total inorganic carbon measurements of seawater. Marine Chemistry 38:37-51.
    7. Citations:
  • Alkalinity:
    1. Curve Fitting Method:
    2. Type of Titration:
    3. Description of Other Titration:
    4. Cell Type: closed
    5. CRM cale:
    6. Sample Volume: 250 mL
    7. Magnitude of Blank Correction:
    8. Accuracy Info: The precision of the measurements was estimated to be better than 0.1%.
    9. Method References: Bradshaw, A. L., P. G. Brewer, D. Shafer, and R. T. Williams. 1981. Measurements of total carbon dioxide and alkalinity by potentiometric titration in the GEOSECS program. Earth and Planetary Science Letters 55:99-115.Brewer, P. G., A. L. Bradshaw, and R. T. Williams. 1986. Measurements of total carbon dioxide and alkalinity in the North Atlantic Ocean in 1981. pp. 358-81. In D. Reichle (ed.), The Global Carbon Cycle: Analysis of the Natural Cycle and Implications of Anthropogenic Alterations for the Next Century. Springer-Verlag, New York.Dyrssen, D., 1965. A gran titration of seawater on board Sagitta. Acta Chemica Scandinavica 19:225-46.
    10. Citations:
  • pCO2 Data:
    1. Analysis:
      1. pCO2 Analysis Method:
      2. Sample Volume:
      3. Headspace_Volume:
      4. Measurement_Temperature:
      5. Temperature Normalization:
      6. Temperature Correction Method:
      7. Variable Reported:
      8. Gas:
      9. Standard Gas Concentrations:
      10. Frequency of Standardization:
    2. Field Replicate Info:
    3. Storage Method:
    4. Accuracy Info:
    5. Method References:
  • pH Data:
    1. pH Scale:
    2. pH Analysis Method:
    3. Calibration Info:
      1. Calibration Description:
      2. In Situ Temperature:
      3. Temperature of Analysis:
      4. Temperature Normalization:
      5. In Situ Pressure:
    4. Accuracy Info:
    5. Method References:
Method References:
Data Set References:
Citation: Goyet, Catherine, Robert M. Key, Kevin F. Sullivan, and Mizuki Tsuchiya. 1997. Carbon Dioxide, Hydrographic, and Chemical Data Obtained During the R/V Thomas Washington Cruise TUNES-1 in the Equatorial Pacific Ocean (WOCE Section P17C). ORNL/CDIAC-99, NDP-062. Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, Oak Ridge, Tennessee. doi:10.3334/CDIAC/otg.ndp062
Measurement Type: discrete measurement discrete data discrete measurements bottle measurement bottle data bottle measurements
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