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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 the Ryofu Maru and the 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.
The system of oceanographic and marine meteorological observations changed from 5 research vessels (the Ryofu Maru, the Keifu Maru, the Kofu Maru, the Seifu Maru and the Chofu Maru) to 2 ones (the Ryofu Maru and the Keifu Maru) in April 2010.
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 |
|---|---|---|---|---|
Kofu Maru | 1001 | East of Honshu | 2010/01/19 | 2010/02/17 |
Keifu Maru | 1001 | The western North Pacific | 2010/01/08 | 2010/03/01 |
Chofu Maru | 1001 | The western North Pacific and the East China Sea | 2010/01/15 | 2010/02/15 |
Ryofu Maru | 1001 | The western North Pacific | 2010/01/14 | 2010/02/03 |
Seifu Maru | 1001 | The Sea of Japan | 2010/01/20 | 2010/02/15 |