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Search Criteria: dataset_idText : CLIVAR_P17N_2001 AND ( datasource :( oceanbt ) )


Dataset_ID: CLIVAR_P17N_2001
Investigator(s) Name: Murata, Akihiko
Organization: JAMSTEC, Japan
Address:
Phone:
Email: akihiko.murata@jamstec.go.jp

Name: Fukasawa, Masao
Organization: Ocean research Dept. JAMSTEC
Address: 2-15 Natsushima, Yokosuka, Kanagawa,237-0061,Japan
Phone: +81-468-67-9470
Email: fksw@jamstec.go.jp
Dataset Info:Dataset ID:CLIVAR_P17N_2001
Submission Dates: Initial Submission: 20040522
Revised Submission: 20040623
Cruise Info:
  • Experiment:
    1. Experiment Name: CLIVAR/CO2 Repeat Hydrography
Cruise:
  • Cruise ID: 49NZ20010725
  • Section: CLIVAR_P17N_2001
  • Geographical Coverage:
    1. Geographical Region: Pacific Ocean
Bounds:
NorthWestSouthEast
6016023130


Temporal Coverage: Start Date: 20010725 End Date: 20010828
Vessel:Vessel Name:R/V Mirai
Vessel ID:49NZ
Country:Lapan
Vessel Owner:JAMSTEC
Data Center URL: http://cdiac.esd.ornl.gov/
Download Data Sets: Repeat CLIVAR Section P17N_2001 Data

Variable Info: downup
Variable NameDescription of Variable
CTD temperature
CTD oxygen
CTD salinity
Bottle salnty
Bottle oxygen
Nutrients
CFCs
delta C14
delta C13
TCO2
TALK
pH
Method Description:
  • Total C02 Data:
    1. TCO2 Analysis Method: Measurements of TCO2 were made with the total CO2 measuring system (Nippon ANS,Ltd) The system comprises of a sea water dispensing system, a CO2 extraction system and a coulometer (Model 5012, UIC Inc.).
    2. Standardization Technique:
      1. Technique Description: Calibration was made using 6 Na2CO3 solutions of nominal 0.0, 500, 1000, 1500, 2000 and 2500 mol dm-3. The slope of the linear regression equation (R2 = 1.00000) was used as the calibration factor.
      2. Sample Volume:
      3. CRM Info:
        1. Correction Magnitude:
        2. Batch Number: 54
        3. CRM Analysis Info: Certified reference materials provided by Prof. A.G. Dickson of SIO were measured when a coulometer solution was renewed.All the values reported were recalibrated against the certified value of CRM. The average difference between the average of the two CRM analyses and the certified value (2107.35 umol/kg) was 1.5+/-1.5 umol/kg.
    3. Field Replicate Info: The average difference of field replicate analyses was calculated to be 1.5+/-1.4 umol/kg (n = 183).
    4. Poisoning Info: 0.2
      1. Poisoning Correction Description:
      2. Poison Volume: 0.2
    5. Accuracy Info:
    6. Method References: Johnson et al. (1987), Johnson and Wallace (1992), and Johnson et al. (1993)
    7. Citations:
  • Alkalinity:
    1. Curve Fitting Method: Measurement of AT was made using a titration system which comprises of a titration manager (TIM900, Radiometer) and uto-burette (ABU901, Radiometer). A combination of a pH glass electrode (pHG201, Radiometer) and a reference electrode (REF201, Radiometer) was used to monitor changes of emf by titrating a sea water sample by an acid (0.1N HCl + 0.6N NaCl).
    2. Type of Titration:
    3. Description of Other Titration:
    4. Cell Type: Open
    5. CRM cale: Dickson
    6. Sample Volume: 100
    7. Magnitude of Blank Correction:
    8. Accuracy Info: The CRMs (mostly Bach #54 and two Bach #53) were measured to remove biases between analyzed values of samples. The average difference between the analysed values of CRM and the certified value (2342.09 mol kg-1; Bach #45) was calculated to be 3.6 +/- 3.3 umol/kg (n = 18). Replicate samples were collected at an interval of ~ 5 to 8 sampling depth. Five replicate samples for each water column. The average difference of field replicate analyses was calculated to be 2.6+/-2.6 umol/kg (n = 181).
    9. Method References:
    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: total hydrogen scale
    2. pH Analysis Method: Separate glass (Radiometer PHG201) and reference (Radiometer REF201) electrodes were used. The e.m.f. of the glass/reference electrode cell was measured with a pH/Ion meter (Radiometer PHM95). In order not to have seawater sample exchange CO2 with the atmosphere during pH measurement, closed glass container with water jacket was used. The temperature during pH measurement was monitored with temperature sensor (Radiometer T901) and controlled at 25C within 0.1C
    3. Calibration Info:
      1. Calibration Description: To calibrate the electrodes the TRIS (pH=8.0936 pH unit at 25_; Delvalls and Dickson, 1998) and AMP (pH=6.786 pH unit at 25_; DOE, 1994) in the synthetic seawater (S=35)(total hydrogen scale) were applied
      2. In Situ Temperature: no information
      3. Temperature of Analysis: 25
      4. Temperature Normalization: no information
      5. In Situ Pressure: no information
    4. Accuracy Info: At each station, 4 to 6 duplicate samples were measured, 180 pairs in total.The average difference was calculated to be 0.003+/-0.003.
    5. Method References: DelValls, T.A. and A.G. Dickson. 1998. The pH of buffers based on 2-amino-2-hydroxymethy l-1,3-propanediol (tris) in Synthetic Seawater. Deep-Sea Res. 45: 1541-1554.DOE. 1994. In: Dickson, A.G. and C. Goyet (Eds.),Handbook of Methods for the Analysis of the Various Parameters of the Carbon Dioxide System in SeaWater, version 2, ORNL/CDIAC-74.
Method References:
Data Set References:
Citation: Fukasawa, M., and A. Murata. 2001. Carbon-related measurements during CLIVAR Repeat Section P17N_2001. http://cdiac.ornl.gov/oceans/RepeatSections/clivar_p17n.htmlCarbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, Oak Ridge, TN, USA.
Measurement Type: discrete measurement discrete data discrete measurements bottle measurement bottle data bottle measurements
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