| Project/Area Number |
17540405
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Meteorology/Physical oceanography/Hydrology
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| Research Institution | Hokkaido University |
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Principal Investigator |
FUKAMACHI Yasushi Hokkaido University, Institute of Low Temperature Science, Assi. Prof. (20250508)
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| Co-Investigator(Kenkyū-buntansha) |
木村 詞明 北海道大学, 低温科学研究所, 博士研究員 (20374647)
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| Project Period (FY) |
2005 – 2007
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| Project Status |
Completed (Fiscal Year 2007)
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| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥270,000)
Fiscal Year 2007: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2006: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 2005: ¥1,300,000 (Direct Cost: ¥1,300,000)
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| Keywords | sea ice / ice thickness / mooring observation / The Sea of Okhotsk / 海氷物理・陸水学 / 地球観測 / 海洋物理・陸水学 |
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| Research Abstract |
Sea-ice mooring data obtained off Yubetsu in the Hokkaido coastal region during the winters of 1999-2001 revealed the mean draft of 0.60m and the high deformed ice ratio of 80%. These results were published in Fukamachi et al. (2006, Journal of Geophysical Research). Also, sea-ice mooring data obtained off Mombetsu during the winter of 2005-06 along with the sediment-trap data collected by the National Institute for Environmental Studies indicated that the quality and quantity of sinking biogenic and lithogenic materials varied with the sea-ice cover. These results were published in Hiwatari et al. (2008, Polar Science).
Sea-ice and oceanic mooring data obtained off the northern Sakhalin during the winter of 2002-03 were analyzed. These data revealed that the mean draft (1.05m) was significantly larger than that off Hokkaido, periods of thin- (<0.2m) and thick-ice (>5m) occurred with offshore and onshore sea-ice velocities, sea-water salinity increased during the thin-ice periods resulting the production of dense shelf water with potential density exceeding 26.7, the observed water-salinity increase is well explained by the brine rejection associated with sea-ice production based on the heat-flux calculation among the atmosphere, sea ice, and ocean. These results were summarized in Fukamachi et al. submitted to Continental Shelf Research.
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