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Underway physical oceanography and carbon dioxide measurements during Ryofu Maru cruise RY8801

Publication Date
DOI: 10.1594/pangaea.814116
  • 49Ry19880116-Track
  • Algorithm
  • Depth
  • Bathymetric
  • Interpolated
  • Distance
  • Extracted From Globalview-Co2
  • Extracted From The 2-Minute Gridded Global Relief Data (Etopo2)
  • Extracted From The Ncep/Ncar 40-Year Reanalysis Project
  • Extracted From The World Ocean Atlas 2005
  • Fugacity Of Carbon Dioxide (Water) At Sea Surface Temperature (Wet Air)
  • Pressure
  • Atmospheric
  • Pressure
  • Atmospheric
  • Interpolated
  • Quality Flag
  • Recomputed After Socat (Pfeil Et Al
  • 2011)
  • Ry8801
  • Ryofu Maru
  • Salinity
  • Interpolated
  • Socat
  • Surface Ocean Co2 Atlas Project
  • Temperature
  • Water
  • Underway Cruise Track Measurements
  • Xco2 (Air)
  • Interpolated
  • Xco2 (Water) At Sea Surface Temperature (Dry Air)
  • Chemistry
  • Earth Science


Variable Measurements of the partial pressure of CO2 in near-surface seawater and in marine boundary air (01 May 2008) Contributors: Hisayuki Yoshikawa Inoue* and Masao Ishii Geochemical Research Department, Meteorological Research Institute, 1-1 Nagamine, Tsukuba, Ibaraki 305-0052, Japan *Current address: Laboratory of Marine and Atmospheric Geochemistry, Graduate School of Environmental Earth Science, Hokkaido University N10W5, Kita-ku, Sapporo 060-0810, Japan Ships: Measurements have been made on onboard the following ships: RV Hakuho Maru I and II, Ocean Research Institute, the University of Tokyo RV Ryofu Maru II, Japan Meteorological Agency RV Natsushima, Japan Marine Science and Technology Center RV Kaiyo Maru, Japan Fisheries Agency MS Wellington Maru, Mitsui O.S.K. Lines RV Sogen Maru, Marine Biotechnology Institute TS Hokuto Maru, National Institute of Sea Training TS Taisei Maru, National Institute of Sea Training RV Kaiyo, Japan Marine Science and Technology Center RV Mirai, Japan Marine Science and Technology Center (see cruise list) Variables: Variable_Name: mixing ratio of CO2 in dry air (xCO2) Description_of_Variable: xCO2 in marine boundary air (xCO2_Air) and xCO2 in air equilibrated with near-surface seawater (xCO2_Sea). Equilibrator_Design: Equilibrator_Type: shower-head Equilibrator_Volume: 1.5 dm3 Water_Flow_Rate: ca. 6 – 10 dm3 min-1 Headspace_Gas_Flow_Rate: ca.500 – 700 cm3 min-1 Vented: Yes. Calibration_Gas: Four cylinders of reference gases have been used to calibrate the output voltage of NDIR every 60 or 90 minutes. All reference gases used onboard underwent a pre- and post-cruise calibration against MRI-87 CO2 concentration scale of which primary standards consists of a series of primary standard gases made at Nippon Sanso Co. with a gravimetric method following the procedure reported by [Tanaka, M., T. Nakazawa and

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