Elucidating mechanisms of intermediate layer warming in the Sea of Okhotsk and North Pacific.
| Project/Area Number |
19340131
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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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 |
MITSUDERA Humio Hokkaido University, 低温科学研究所, 教授 (20360943)
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| Co-Investigator(Kenkyū-buntansha) |
OHSHIMA Keiichiro 北海道大学, 低温科学研究所, 教授 (30185251)
NAKAMURA Tomohiro 北海道大学, 低温科学研究所, 講師 (60400008)
ONO Kazuya 北海道大学, 低温科学研究所, 技術職員 (40396320)
ONO Tsuneo 水産総合研究センター, 北海道区水産研究所, 室長 (40371786)
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| Project Period (FY) |
2007 – 2009
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| Project Status |
Completed (Fiscal Year 2009)
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| Budget Amount *help |
¥18,590,000 (Direct Cost: ¥14,300,000、Indirect Cost: ¥4,290,000)
Fiscal Year 2009: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2008: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2007: ¥6,760,000 (Direct Cost: ¥5,200,000、Indirect Cost: ¥1,560,000)
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| Keywords | オホーツク海 / 熱塩循環 / 中層水 / 温暖化 / 熱延循環 / 中層循環 / ポリニヤ / 高密度陸棚水 / 風成循環と熱塩循環の結合 / 海洋中層 / 北太平洋 / 風成循環 / 潮汐混合 |
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| Research Abstract |
This study is aimed at elucidating characteristics of intermediatelayer warming in the Sea of Okhotsk and western subarctic gyre of the North Pacific, and its mechanisms from a point of view of thermohaline circulation. Dense shelf water (DSW) produced over the northern shelves in the Okhotsk has freshened about 0.1 PSU in the last 50 years, causing warming in the 26.8-27.0σ_θ. isopycnals Numerical experiments indicate that air temperature rise (which causes decrease in sea ice production), increase of fresh water precipitation and wind variations are responsible for the warming.
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Report
(4 results)
Research Products
(100 results)
