Outline of Research Cruises for Research Vessel "MIRAI"
during fiscal year 2004

1. Cruise code :
MR05-K01

2. Main research theme:
Time-series observational study on the Material Cycle in the North Pacific

3. Objectives:
The northern North Pacific, especially its western part, has been attracting attention of chemical oceanographers because of its importance in global biogeochemical cycles of carbon and its related materials, which have a great impact to the climate change of the earth. In addition, physical oceanographers have been interested in that region with respect to the formation of the North Pacific Intermediate Water. Despite its importance, there has been few systematic survey and time-series observation of biogeochemical processes in the area to estimate the impact of high latitude seas on the global climate change.

4. Outline of observation:
Based on the above mentioned goal, time-series observational stations including station K1 (51N, 165E), K2 (47N, 160E) and K3 (39N, 160E) were set. During cruise, time-series observational mooring systems will be recovered and deployed. In addition, seawater, aerosol, suspended materials and plankton will be collected at above stations, KNOT and so on. Vertical profiles of salinity and temperature will be measured by XBT and XCTD.

5. Main research area:
The northwestern North Pacific including the above stations

6. Ports of call:
Port of departure : Sekinehama
Returning port : Sekinehama

7. Cruise period:
28 February 2005 - 24 March 2005 (25 days)

8. Chief scientist on board:
Makio Honda (Chemical Oceanography)

9. Contact person for questionnaire on this cruise:
Makio Honda
Must Institute for Oceanography (MIO)
Japan Marine Science and Technology Center (JAMSTEC) (Yokosuka office)
2-15 Natsushima-cho, Yokosuka, 237-0061, Japan
Phone: +81-46-867-9502, Fax: +81-46-867-9455, E-mail: hondam@jamstec.go.jp

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