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Oceanographic and Marine Meteorological Observations by Research Vessels

Oceanographic and marine meteorological observations are conducted in the western North Pacific and in the seas adjacent to Japan by two JMA research vessels named Ryofu Maru and Keifu Maru. Background marine pollution and greenhouse gases are also observed. For details of the data provided on this website, please refer to Description and Format of Data.
The system of oceanographic and marine meteorological observations changed from five research vessels ( Ryofu Maru, Keifu Maru, Kofu Maru, Seifu Maru and Chofu Maru) to two ones ( Ryofu Maru and Keifu Maru) in April 2010.

Observation Data

Year:     Please select a year and click the "Refresh" button.

Point to one of the seasons below to display all observation tracklines for the season. Clicking on the season shows a list of observation cruises for that period in the table on the right.

Winter      Spring      Summer      Fall     

Trackline of ship

Pointing to a ship name displays its trackline in the figure on the left. Click on the ship name to view the station chart and observation data of the cruise.

Winter of 2013

Ship NameCruise No.Observation AreaStart DateEnd Date
Keifu Maru1301South of Honshu and the East China Sea 2013/01/072013/01/26
Keifu Maru1302The western North Pacific 2013/02/032013/03/27
Ryofu Maru1301The western North Pacific 2013/01/092013/03/01
Ryofu Maru1302East of Honshu 2013/03/072013/03/27