OCEAN CDIAC's Ocean CO2 Data Program
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Dataset_ID: WOCE_A10
Investigator(s) Name: Wallace, Douglas
Organization: Forschungsbereich Marine Biogeochemie
Address: Institut fur Meereskunde,an der Universitat Kiel,Dusternbrooker Weg 20,D-24105 Kiel,GERMANY
Phone: +49-431-600-4200
Email: dwallace@ifm.uni-kiel.de

Name: Johnson, Kenneth
Organization: BNL (retired)
Address:
Phone:
Email: johnson_k37@hotmail.com
Dataset Info:Dataset ID:WOCE_A10
Submission Dates: Initial Submission: 20040611
Revised Submission: 20040611
Cruise Info:
  • Experiment:
    1. Experiment Name: WOCE
Cruise:
  • Cruise ID: 06MT22_5
  • Section: WOCE_A10
  • Geographical Coverage:
    1. Geographical Region: Atlantic Ocean
Bounds:
NorthWestSouthEast
-27-47-3019


Temporal Coverage: Start Date: 19921227 End Date: 19930131
Vessel:Vessel Name:Meteor
Vessel ID:06MT
Country:Germany
Vessel Owner:Federal Republic of Germany
Data Center URL: http://cdiac.esd.ornl.gov/
Download Data Sets: Descrete measurements from WOCE A10 Section

Variable Info: downup
Variable NameDescription of Variable
CTD PressureDBAR
CTD Temperature
CTD Salinity
Bottle Salinity
Bottle OxygenUMOL/KG
SilicateUMOL/KG
NitrateUMOL/KG
PhosphateUMOL/KG
CFC-11PMOL/KG
CFC-12PMOL/KG
DELC14/MILLE
TCO2UMOL/KG
pCO2UATM
TALKUMOL/KG
pH
C14 Error/MILLE
Method Description:
  • Total C02 Data:
    1. TCO2 Analysis Method: The TCO2 was determined by using two automated dynamic headspace sample SOMMA processors with coulometric detection of the CO2 extracted from acidified samples. A description of the SOMMA-coulometry system and its calibration can be found in Johnson et al. (1987), Johnson and Wallace (1992), and Johnson et al. (1993).
    2. Standardization Technique:
      1. Technique Description:
      2. Sample Volume: 300 mL
      3. CRM Info:
        1. Correction Magnitude:
        2. Batch Number: 711
        3. CRM Analysis Info: The CRMs were supplied by Dr. A. Dickson of Scripps Institution of Oceanography (SIO) (DOE 1994) and were also routinely analyzed. CRMs from batches 7 and 11 were available for this work (batch 7: S = 37.120, TCO2 = 1926.41 ± 0.82 µmol/kg; batch 11: S = 38.5, TCO2 = 2188.77 µmol/kg). The CRMs were made from filtered sterile salt solutions spiked with Na2CO3, and their TCO2 concentrations were determined by vacuum-extraction/manometry in the laboratory of Dr. C. D. Keeling at SIO.
    3. Field Replicate Info: The system precision data are given in Table 2. For these data, within-sample precision is the average absolute difference between two replicates analyzed from the same sample bottle, between-sample precision is the average absolute difference between duplicate sample bottles taken from the same Niskin bottle, and between-Niskin precision is the average absolute difference of analyses of samples taken from two Niskin bottles that were closed at the same depth. The IfMK group assessed instrument-specific precision by periodically running two replicates from the same bottle (within-sample), whereas precision on the BNL system was assessed by running one replicate from each of two sample bottles filled from the same Niskin bottle (between-sample). The pooled standard deviation (Sp2) is the square root of the pooled variance from the between-samples replicates (n = 2) according to Youden (1951):
    4. Poisoning Info: During the cruise the samples were not poisoned with HgCl2 as per normal operating procedure (DOE 1994), but they were analyzed within 24 h of collection.
      1. Poisoning Correction Description: During the cruise the samples were not poisoned with HgCl2 as per normal operating procedure (DOE 1994), but they were analyzed within 24 h of collection.
      2. Poison Volume:
    5. Accuracy Info: In general, there is no consistent difference between the station-mean residuals on the basis of measurements made with the BNL and IfMK SOMMA systems. The overall consistency of the two sets of measurements appears to be better than ±2 µmol/kg, which is consistent with the accuracy and precision bounds (±1.9) for the overall data set. This confirms that the cruise-wide calibration of the TCO2 data analyzed with the two instruments was nearly identical.
    6. Method References: Huffman, E. W. D., Jr. 1977. Performance of a new automatic carbon dioxide coulometer. Microchemical J. 22:567-73. Johnson, K. M., A. E. King, and J. McN. Sieburth. 1985. Coulometric TCO2 analyses for marine studies: An introduction. Mar. Chem. 16:61-82. Johnson, K. M., J. M. Sieburth, P. J. B. Williams, and L. Brändström. 1987. Coulometric TCO2 analysis for marine studies: Automation and calibration. Mar. Chem. 21:117-33. Johnson, K. M., and D. W. R. Wallace. 1992. The single-operator multiparameter metabolic analyzer for total carbon dioxide with coulometric detection. DOE Research Summary, No. 19. Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, Oak Ridge, Tenn. Johnson, K. M., K. D. Wills, D. B. Butler, W. K. Johnson, and C. S. Wong. 1993. Coulometric total carbon dioxide analysis for marine studies: Maximizing the performance of an automated gas extraction system and coulometric detector. Mar. Chem. 44:167-87. DOE (U.S. Department of Energy). 1994. Handbook of methods for the analysis of the various parameters of the carbon dioxide system in sea water. Ver. 2. ORNL/CDIAC-74. A. G. Dickson and C. Goyet (eds.). Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, Oak Ridge, Tenn. Wilke, R. J., D. W. R. Wallace, and K. M. Johnson. 1993. A water-based, gravimetric method for the determination of gas sample loop volume. Anal. Chem. 65:2403-06. Johnson, K. M., B. Schneider, L. Mintrop, and D. W. R. Wallace. 1996. Carbon Dioxide, Hydrographic, and Chemical Data Obtained During the R/V Meteor cruise 18/1 in the North Atlantic Ocean (WOCE Section A1E, September 1991). ORNL/CDIAC-91, NDP-056. Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, Oak Ridge, Tenn.
    7. Citations:
  • Alkalinity:
    1. Curve Fitting Method: The titration cell was based on the systems described by Bradshaw and Brewer (1988) and Millero et al. (1993). The potential was followed with an electrode pair consisting of a ROSS (Orion Inc.) glass pH electrode and a ROSS AgCl reference electrode connected to a high precision digital voltmeter. The titration was controlled by a computer that waited for stable emf-readings before adding the next acid increment
    2. Type of Titration:
    3. Description of Other Titration:
    4. Cell Type: Closed
    5. CRM cale: Millero
    6. Sample Volume: 500 mL
    7. Magnitude of Blank Correction:
    8. Accuracy Info: The precision of the method was ±2.0 µmol/kg as determined by replicate analyses of samples.
    9. Method References: Millero, F. J., J.-Z. Zhang, K. Lee, and D. M. Campbell. 1993. Titration alkalinity of seawater. Mar. Chem. 44:153-65. Bradshaw A. L., and P. G. Brewer. 1988. High precision measurements of alkalinity and total carbon dioxide in seawater by potentiometric titration-1. Presence of unknown protolyte (s)? Mar. Chem. 23:69-86. Goyet, C., and A. Poisson. 1989. New determination of carbonic acid dissociation constants in seawater as a function of temperature and salinity. Deep-Sea Res. 36:1635-54. Stoll, M. H. C., J. W. Rommets, and H. J. W. De Baar. 1993. Effect of selected calculation routines and dissociation constants on the determination of total carbon dioxide in seawater. Deep-Sea Res. 40:1307-22.
    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: Johnson, K. M., B. Schneider, L. Mintrop, D. W. R. Wallace, and A. Kozyr (ed.). 1998 Carbon Dioxide, Hydrographic, and Chemical Data Obtained During the R/V Meteor Cruise 22/5 in the South Atlantic Ocean (WOCE Section A10, December-1992 January 1993). ORNL/CDIAC-113, NDP-066. Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, U.S. Department of Energy, Oak Ridge, Tennessee. doi: 10.3334/CDIAC/otg.ndp066
Measurement Type: discrete measurement discrete data discrete measurements bottle measurement bottle data bottle measurements
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