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 2010

Ship Name	Cruise No.	Observation Area	Start Date	End Date
Ryofu Maru	1002	South of Honshu and the East China Sea	14 Apr. 2010	07 May 2010
Ryofu Maru	1003	East of Honshu and South of Honshu	11 May 2010	31 May 2010
Keifu Maru	1002	East of Honshu	14 Apr. 2010	23 Apr. 2010
Keifu Maru	1003	East of Honshu	27 Apr. 2010	15 May 2010
Keifu Maru	1004	South of Honshu and the East China Sea	21 May 2010	09 Jun. 2010

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.)