2012 Fiscal Year Final Research Report
Global mapping and monitoring of sea ice production
| Project/Area Number |
20221001
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| Research Category |
Grant-in-Aid for Scientific Research (S)
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| Allocation Type | Single-year Grants |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
EBUCHI Naoto 北海道大学, 低温科学研究所, 教授 (10203655)
AOKI Shigeru 北海道大学, 低温科学研究所, 准教授 (80281583)
FUKAMACHI Yasushi 北海道大学, 低温科学研究所, 准教授 (20250508)
TOYOTA Takenobu 北海道大学, 低温科学研究所, 助教 (80312411)
MATSUMURA Yoshimasa 北海道大学, 低温科学研究所, 助教 (70631399)
KITADE Yujiro 東京海洋大学, 海洋科学技術研究科, 准教授 (50281001)
TATEYAMA Kazutaka 北見工業大学, 工学部, 助教 (30374789)
NIHASHI Sohey 苫小牧工業高等専門学校, 機械工学科, 准教授 (50396321)
ONO Kazuya 北海道大学, 低温科学研究所, 技術専門職員 (40396320)
ENOMOTO Hiroyuki 情報・システム研究機構, 国立極地研究所, 教授 (00213562)
KIMURA Noriaki 東京大学, 大学院・新領域創成科学研究科, 助教 (20374647)
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| Co-Investigator(Renkei-kenkyūsha) |
TAMURA Takeshi 情報・システム研究機構, 国立極地研究所, 助教 (40451413)
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| Project Period (FY) |
2008 – 2012
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| Keywords | 海氷生産 / 中深層循環 / 沿岸ポリニヤ / 南極底層水 / マイクロ波放射計 |
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| Research Abstract |
Saline water rejected during sea ice formation drive the global overturning circulation. We have developed an algorithm to estimate and provide global mapping of sea ice production from satellite data for the first time. High ice production process in coastal polynyas has been clarified by mooring observations with validation of the algorithm. We have revealed that the region off Cape Darnley is the missing formation area of Antarctic Bottom Water with the second highest ice production in the Antarctica. We have also clarified the strong linkage between variabilities of sea ice production and bottom/intermediate water in the Antarctic Ocean and Okhotsk Sea and suggested weakening of the overturning in these oceans.
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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
Pages: 235-240
DOI
Peer Reviewed
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[Presentation] Williams: New findings of Antarctic Bottom Water: Ongoing warming/freshening and a discovered AABW source, The Third Symposium on Polar Science, Multidiciplinary session "Late Cenozoic Environmental Changes in Antarctic Cryosphere: Perspectives from Sea, Land, and Ice Sheets"2012
Author(s)
Ohshima, K. I., Y. Fukamachi, S. Aoki, T.Tamura, and G. D.
Organizer
National Institute of Polar Research
Place of Presentation
Tachikawa, Japan
Year and Date
2012-11-27
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[Presentation] Wakatsuchi: 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, and M.
Organizer
IUGG 2011, Melbourne Convention and Exhibition Centre
Place of Presentation
Melbourne, Australia
Year and Date
2011-07-02
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