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

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

Revision History

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.

Summer of 2018

Ship Name	Cruise No.	Observation Area	Start Date	End Date
Keifu Maru	1806	The western North Pacific	09 Jul. 2018	29 Aug. 2018
Keifu Maru	1807	South of Honshu	05 Sep. 2018	16 Sep. 2018
Ryofu Maru	1805	The western North Pacific	14 Jun. 2018	22 Jul. 2018
Ryofu Maru	1806	The western Pacific	06 Aug. 2018	27 Sep. 2018

JMA Data Report of Oceanographic Observations Special Issue is preserved by the National Diet Library's Web Archiving Project (WARP). (Go to the WARP page.)