Estimations of freshening of Antarctic Bottom Water by international observation network and effect of glacial melt water
| Project/Area Number |
21310002
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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 |
Environmental dynamic analysis
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| Research Institution | Hokkaido University |
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Principal Investigator |
AOKI Shigeru 北海道大学, 低温科学研究所, 准教授 (80281583)
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| Co-Investigator(Kenkyū-buntansha) |
FUKAMACHI Yasushi 北海道大学, 低温科学研究所, 准教授 (20250508)
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| Co-Investigator(Renkei-kenkyūsha) |
SHIMADA Keishi 東京海洋大学, 海洋観測支援センター, 博士研究員 (30567037)
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| Project Period (FY) |
2009 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥15,730,000 (Direct Cost: ¥12,100,000、Indirect Cost: ¥3,630,000)
Fiscal Year 2012: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2011: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2010: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2009: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
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| Keywords | 極域環境監視 / 南極底層水 / 淡水化 / 酸素安定同位体比 / メルツ氷河 / ロス海底層水 / オーストラリア南極海盆 / 酸素同位体比 / 海洋科学 / 極地 / 環境変動 / 酸素安定体 |
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| Research Abstract |
We established an international ocean observation network in the Australian-Antarctic Basin, Southern Ocean, with implementing stable oxygen isotope measurements as the standard method and compared the results with the previous hydrographic observations. Freshening tendency of the Antarctic Bottom Water in this basin was estimated. Analysis revealed that the major cause of this freshening is the freshening of the bottom water, flowing into this basin from the east, and its reduction of the flow rate. With this observation network, the baseline structure of stable oxygen isotope was constructed to infer causes of future oceanic change.
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Report
(5 results)
Research Products
(54 results)
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[Journal Article] Antarctic Bottom Water production by intense sea-ice formation in the Cape Darnley Polynya, Nature Geoscience2013
Author(s)
Ohshima, K. I., Y. Fukamachi, G. D.Williams, S. Nihashi, F. Roquet, Y. Kitade, T. Tamura, D. Hirano, L. Herraiz- Borreguero, I. Field, M. Hindell, S. Aoki and M.Wakatsuchi
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Journal Title
Highlight article in March issue
Volume: 6
Issue: 3
Pages: 235-240
DOI
Related Report
Peer Reviewed
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[Presentation] Formation of Antarctic Bottom Water off Cape Darnley with huge sea ice production2011
Author(s)
Ohshima, K.I., Y.Fukamachi, Y.Nakayama, T.Tamura, S.Nihashi, Y.Kitade, Y.Matsumura, H.Hasumi, S.Aoki, M.Wakatsuchi
Organizer
IUGG 2011
Place of Presentation
メルボルン展示会センー(オーストラリア)
Year and Date
2011-07-02
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