| 1. Cruise Code : |
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2. Main research theme : |
| Study on the paleoceanography in high latitude of the
North Pacific and the Arctic area. |
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3. Objectives : |
The high-latitude area of the North Pacific including
its marginal seas such as the Okhotsk Sea, and the Arctic area,
is closely related with climate variations of Asian countries,
including that of Japan.
The aim of this study is understanding of glacial and inter-glacial
climate changes and abrupt changes in the above area, especially
the sea surface temperature and salinity changes and impact
of the Amur discharge on the thermohaline circulation and sea-ice
formation in the Okhotsk Sea. In addition, we investigate the
Arctic area to understand the relationship between methane release
events and climate changes. |
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4. Outline of observation : |
| The cruise is divided in two legs of which research area
are the Okhotsk and Japan Seas area (leg. 1) and the Arctic
area (leg. 2). The main observation items are site survey (Sea
beam and sub-bottom profiler system), sediment coring (Piston
corer, Gravity corer, and Multiple corer), conductivity, temperature,
and depth observation and water collection in the water column
(CTD/Rosette sampler), and plankton collection in the surface
water (Norpac and MTD nets). |
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5. Main research area : |
| Leg. 1: |
the Off Tokachi, the Okhotsk Sea and the northern
area of the Japan Sea |
| Leg. 2: |
the eastern continental shelf area of the
Bering Sea, the Chukuchi Sea and the Alaskan coastal area of
the Arctic Sea |
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6. Cruise period : |
| August - September 2006 (60 days) |
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7. Ports of call (tentative): |
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8. Proponent of main research theme : |
| Institute of Observational Research for Global Change,
Plaeoclimatology and paleoceanography Group, Naomi Harada (specialty:
Organic geochemistry, Paleoceanography) |
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9. Contact person for questionnaire on this cruise : |
Naomi Harada
Japan Agency for Marine-Earth Science and Technology
2-15 Natsushima-cho, Yokosuka, 237-0061, Japan
Phone: +81-46-867-9504, Fax: +81-46-867-9455, E-mail: haradan@jamstec.go.jp |
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10. Remarks |
