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.

Winter of 2009

Ship Name	Cruise No.	Observation Area	Start Date	End Date
Kofu Maru	0901	East of Honshu	22 Jan. 2009	27 Feb. 2009
Keifu Maru	0901	The western North Pacific	16 Jan. 2009	04 Mar. 2009
Chofu Maru	0901	The western North Pacific and the East China Sea	23 Jan. 2009	01 Mar. 2009
Ryofu Maru	0901	The western North Pacific	16 Jan. 2009	10 Mar. 2009
Seifu Maru	0901	The Sea of Japan	22 Jan. 2009	26 Feb. 2009

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.)