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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.

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     

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 2020

Ship NameCruise No.Observation AreaStart DateEnd Date
Ryofu Maru2001The western North Pacific and the East China Sea 10 Jan. 202021 Feb. 2020
Ryofu Maru2002East of Honshu 27 Feb. 202023 Mar. 2020
Keifu Maru2001The western North Pacific 08 Jan. 202026 Jan. 2020
Keifu Maru2002The western North Pacific 01 Feb. 202023 Mar. 2020