JAMSTEC > Development and Operation Sector > Marine Technology and Engineering Center > Research Vessels and Deep Ocean Investigation System > Ocean observational system

Department of Seamless Environmental Prediction Research

Ocean observational system

TRITON buoys

  • The TRITON array consists of 15 buoys moored in the western tropical Pacific Ocean and three buoys moored in the eastern Indian Ocean, telemetering oceanographic and meteorological data to shore in real-time.
  • The array is a major component of the El Nino/Southern Oscillation (ENSO) observing system for the Pacific Ocean, Indian Ocean Dipole mode (IOD) observing system for the Indian Ocean, the Global Climate Observing System (GCOS), and the Global Ocean Observing System (GOOS).
  • m-TRITON buoys and new miniaturized buoys (with a 1/3 weight ratio) were developed. They have been deployed in the Indian Ocean since 2006.

TRITON buoy Web site (access the TRITON Data)

MCS (multichannel seismic reflection) / OBS (ocean-bottom seismograph)

OBS deployed at the sea bottom
  • OBS units have been placed on the ocean bottom to observe artificial seismic waves created by an air-gun system on research vessels. They have the ability to surface after observation. The seismic waves recorded by the OBS/MCS are analyzed to understand the deep structure of the ocean floor.

Observation at Okinotorishima

  • Meteorological and the oceanographic data have been observed at Okinotorishima since 1993.

Okinotorishima Web site (View data from Okinotorishima)


Meteorological observation equipment

Oceanographic observation equipment placed in the sea

Observation Winch

Observation winch on the R/V KAIYO
  • Observation winches have been set up on research vessels as necessary. They run greaseless coaxial cable for fresh water sampling, light and electrical current compounded cable, and wire rope.