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.

Fall of 2011

Ship Name	Cruise No.	Observation Area	Start Date	End Date
Keifu Maru	1109	The western North Pacific, the Sea of Japan and the East China Sea	04 Oct. 2011	27 Nov. 2011
Keifu Maru	1110	East of Honshu	05 Dec. 2011	21 Dec. 2011
Ryofu Maru	1110	East of Honshu	04 Nov. 2011	29 Nov. 2011
Ryofu Maru	1111	South of Honshu	03 Dec. 2011	21 Dec. 2011

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.)