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.
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.
|Ship Name||Cruise No.||Observation Area||Start Date||End Date|
|Ryofu Maru||2001||The western North Pacific and the East China Sea||10 Jan. 2020||21 Feb. 2020|
|Ryofu Maru||2002||East of Honshu||27 Feb. 2020||23 Mar. 2020|
|Keifu Maru||2001||The western North Pacific||08 Jan. 2020||26 Jan. 2020|
|Keifu Maru||2002||The western North Pacific||01 Feb. 2020||23 Mar. 2020|