Section outline

    • ・Things to prepare (prepared by training staff)

      Observation field book and clipboard, pencil, transparency plate, CTD sensor, bucket with string, water sampling bottle for chlorophyll measurement, plankton net (20 µm mesh), water sampling bottle for plankton net

    • ・Work procedures on board

      1. When the ship stops at the survey point, record the following items in the observation field book.

      ◎ Date and time, arrival time, name of observation point
      ◎ Latitude and longitude (confirmed by ship's GPS)
      ◎ Water depth (confirmed with the ship's fish finder)

      2. Transparency measurement using a transparency plate (Secchi disk)

      Video of transparency depth measurement using a transparency plate


       

      After measuring the transparency, record it in the field notebook.

    • 3. Measurement of vertical distribution of water temperature, salinity and chlorophyll fluorescence by CTD sensor

      Deepen your understanding of ocean stratification and mixing (principle video)

       

       

      Measurement of sea water temperature and salinity vertical profile using CTD (video)


    • 4. Sampling surface water using a surface sampling bucket

      After washing the water sampling bottle three times, fill it with water. After sampling, put the bottle in the cooler box.

       

      5. Sampling near bottom or subsurface chlorophyll maximum (SCM) using Niskin X water sampler

      After washing the water sampling bottle three times, fill it with water. After sampling, put the bottle in the cooler box.

    • Water sampling method Page

    • 6. Collection of phytoplankton using a plankton net

      After sampling, put the bottle in the cooler box.