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.

Spring of 2013

Ship Name	Cruise No.	Observation Area	Start Date	End Date
Keifu Maru	1303	The western North Pacific and the East China Sea	11 Apr. 2013	08 May 2013
Keifu Maru	1304	East of Honshu	14 May 2013	27 May 2013
Keifu Maru	1305	The western North Pacific	31 May 2013	20 Jun. 2013
Ryofu Maru	1303	South of Honshu	09 Apr. 2013	20 Apr. 2013
Ryofu Maru	1304	East of Honshu	26 Apr. 2013	27 May 2013
Ryofu Maru	1305	South of Honshu	03 Jun. 2013	12 Jun. 2013

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.)