Underway measurements metadata form

• Investigator:
  • Name: Akira Nakadate
  • Organization: Pollutants Chemical Analysis Center, Marine Division, Global Environment and Marine Depertment
  • Address:
    Japan Meteorological Agency, 1-3-4 Otemachi Chiyoda-ku Tokyo 100-8122, Japan
  • Phone: +81-3-3212-8341 Ext.5133
  • Email: seadata@climar.kishou.go.jp
• Dataset Info:
  • Dataset ID: KeifuMaru
  • Submission Dates:
    • Initial Submission: 2004/06/21
    • Revised Submission: 2008/08/29
• Cruise Info:
  • Experiment:
    • Experiment Name: Underway air and surface seawater pCO₂ data measured during the period of 2001-2007 on board the R/V Keifu Maru operated by the Kobe Marine Observatory
    • Cruise:
      • Cruise ID:
      • Section:
      • Geographical Coverage:
        • Geographical Region:
          Pacific Ocean
        • Bounds:
          • Westernmost Longitude: 127°E
          • Easternmost Longitude: 165°E
          • Northernmost Latitude: 35°N
          • Southernmost Latitude: 5°S
      • Temporal Coverage:
        • Start Date: 2001/01/20
        • End Date: 2007/11/24
      • Ports of Call:
        
  • Vessel:
    • Vessel Name: R/V Keifu Maru II
    • Vessel ID: 49FA
    • Country: Japan
    • Vessel Owner: Ministry of Land, Infrastructure, Transport and Tourism
• Variables Info:
  • Variable:
    • Variable Name: Mixing ratio of CO₂ (χCO₂) in marine boundary air (xCO2a) and in air equilibrated with near-surface seawater (xCO2eq)
    • Description of Variable: μmol/mol in dry air
  • Method Description:
    • Equilibrator Design:
      • Equilibrator type: Shower-head
      • Equilibrator volume: 2 dm³ (air), 20 dm³ (seawater)
      • Water_Flow_Rate: 5 dm³min^-1
      • Headspace_Gas_Flow_Rate: 0.5 dm³min^-1
      • Vented: Yes
    • Measurement Method: Four cylinders of calibration gases have been used to calibrate the output voltage of Non-Dispersive Infra-Red (NDIR) gas analyzer. Calibration gases used onboard underwent a pre- and post-cruise calibration.
    • Manufacturer of Calibration Gas: Japan Fine Products Co., Ltd. (Japan)
    • CO₂ Sensors:
      • Manufacturer: Fisher-Rosimount GmbH & Co.
      • Model: MLT 3.1
      • Environmental Control:
        
      • Resolution: < 0.1 μmol/mol
      • Uncertainty: 0.3 μmol/mol (air), 3 μmol/mol (seawater)
      • Calibration:
        Frequency: every 1 hour, Scale: WMO mole fraction scale (X2005)
    • Other sensors:
      • Manufacturer:
      • Model:
      • Resolution:
      • Calibration:
        
    • Method References:
      Inoue, H. Y., Ishii, M., Matsueda, H., Saito, S., Midorikawa, T., and Nemoto, K. 1999. MRI measurements of partial pressure of CO₂ in surface waters of the Pacific during 1968 to 1970: re-evaluation and comparison of data with those of 1980s and 1990s. Tellus, 51B, 830-848.
      Körtzinger, A., Mintrop, L., Wallance, D. W. R., Johnson, K. M., Neill, C., Tilbrook, B., Towler, P., Inoue, H. Y., Ishii, M., Shaffer, G., Torres Saavedra, R. F., Ohotaki, E., Yamashita, E., Poisson, A., Brunet, C., Schauer, B., Goyet, C., and Eischeid, G. 2000. The international at-sea intercomparison of fCO₂ systems during the R/V Meteor Cruise 36/1 in the North Atlantic Ocean. Mar. Chem., 72, 171-192.
  • Additional Information:
    
  • Data Set References:
    
  • Citation:
    
• Data Set Link:
  • URL: http://gaw.kishou.go.jp/wdcgg/wdcgg.html
  • Label: WMO Global Atmosphere Watch World Data Centre for Greenhouse Gases (WDCGG)
  • Link Note: