| Project/Area Number |
18201001
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Hokkaido University |
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Principal Investigator |
KUMA Kenshi Hokkaido University, 大学院・水産科学研究院, 教授 (30205158)
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| Co-Investigator(Kenkyū-buntansha) |
SAITOH Seiichi 北海道大学, 大学院・水産科学研究院, 教授 (70250503)
ISODA Yutaka 北海道大学, 大学院・水産科学研究院, 准教授 (10193393)
NAGAO Seiya 金沢大学, 環日本海域環境研究センター, 教授 (20343014)
NAKATSUKA Takeshi 名古屋大学, 大学院・環境学研究科, 教授 (60242880)
SUZUKI Koji 北海道大学, 大学院・地球環境科学研究院, 准教授 (40283452)
WATANABE yutaka 北海道大学, 大学院・地球環境科学研究院, 准教授 (90333640)
NISHIOKA Jun 北海道大学, 低温科学研究所, 准教授 (90371533)
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| Project Period (FY) |
2006 – 2009
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| Project Status |
Completed (Fiscal Year 2009)
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| Budget Amount *help |
¥50,310,000 (Direct Cost: ¥38,700,000、Indirect Cost: ¥11,610,000)
Fiscal Year 2009: ¥7,930,000 (Direct Cost: ¥6,100,000、Indirect Cost: ¥1,830,000)
Fiscal Year 2008: ¥9,490,000 (Direct Cost: ¥7,300,000、Indirect Cost: ¥2,190,000)
Fiscal Year 2007: ¥15,080,000 (Direct Cost: ¥11,600,000、Indirect Cost: ¥3,480,000)
Fiscal Year 2006: ¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
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| Keywords | 化学海洋 / 微量金属 / 鉄 / 栄養塩 / 基礎生産 / 縁辺海 / 海洋科学 / 化学海洋学 / ベーリング海 / 北部北太平洋 / 北極海 / 北西部北太平洋 / オホーツク海 / 日本海 / 海洋生態 |
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| Research Abstract |
Surface mixed layer of the basin region in the Bering Sea is under a typical iron-deficient and nutrient-rich condition with low primary production because of low atmospheric iron input. However, phytoplankton bloom (Breen Belt) is observed at the shelf break region of the Southeastern Bering Sea for a long period in summer. It is suggested that the Green Belt is maintained by the supply of nutrient-rich basin water and iron-rich shelf deep water to the surface water of the shelf break. The tidal mixing in the straits of the Kuril Islands is an important role on supplying nutrient and iron to the surface water of the northwestern North Pacific Ocean and maintaining the high primary production in the Oyashio region. On the contrary, the surface mixed layer in the Japan Sea is characterized by low nutrient and high iron concentrations, resulting from high atmospheric iron input to nutrient-depleted surface water of the Japan Sea close to the Asian continent.
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