Is the region off Cape Darnley a main source of Antarctic Bottom Water?

2013 Fiscal Year Final Research Report

• Project/Area Number: 23340135
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Meteorology/Physical oceanography/Hydrology
• Research Institution: Hokkaido University
• Principal Investigator: FUKAMACHI Yasushi 北海道大学, 低温科学研究所, 准教授 (20250508)
• Co-Investigator(Kenkyū-buntansha): AOKI Shigeru 北海道大学, 低温科学研究所, 准教授 (80281583) ; MATSUMURA Yoshimasa 北海道大学, 低温科学研究所, 助教 (70631399)
• Co-Investigator(Renkei-kenkyūsha): SHIMIZU Daisuke 情報・システム研究機構, 国立極地研究所, 特任技術専門員 (80455500)
• Project Period (FY): 2011-04-01 – 2014-03-31
• Keywords: 南極海 / 南極底層水 / 海氷

Research Abstract

Combining time-series oceanic data obtained by moorings off the Cape Darnley in the Indian Sector of the Southern Ocean during 2008-09 with concurrent sea-ice data obtained by satellite remote sensing and hydrographic data obtained by instrumented seals, we have quantitatively shown that this region is the one of the main sources of Antarctic Bottom Water (AABW) due to intense sea-ice production in a coastal polynya. Namely, this region is the fourth AABW source region after the Weddell and Ross Seas and the region off Adélie Land. Unlike in the other three source regions, this region is the main AABW source solely due to intense sea-ice production without any of large continental shelf, ice shelf, and large depression.

Research Products

• [Journal Article] Antarctic BottomWater production by intense sea-ice formation in the Cape Darnley polynya (2013)
  • 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
  • Journal Title: Nature Geoscience Volume: 6 Pages: 235-240
  • DOI: 10.1038/ngeo1738
  • Peer Reviewed
• [Journal Article] Enhancement of sea-ice drift due to the dynamical interaction between sea ice and a coastal ocean (2012)
  • Author(s): Nakayama, Y., K. I. Ohshima, and Y. Fukamachi
  • Journal Title: Journal of Physical Oceanography Volume: 42 Pages: 179-192
  • DOI: 10.1175/JPO-D-11-018.1
  • Peer Reviewed
• [Journal Article] Antarctic Bottom Water production from the Vincennes Bay Polynya, East Antarctica
  • Author(s): Kitade, Y., K. Shimada, T. Tamura, G. D. Williams, S. Aoki, Y. Fukamachi, F. Roquet, M. Hindell, S. Ushio, and K. I. Ohshima
  • Journal Title: Geophysical Research Letters Volume: (in press)
  • Peer Reviewed
• [Presentation] 結氷過程の数値モデリングII (2014)
  • Author(s): 松村 義正
  • Organizer: 日本海洋学会春季大会
  • Place of Presentation: 東京海洋大学品川キャンパス,東京都港区
  • Year and Date: 2014-03-27
• [Presentation] Modeling frazil cryst- als and their impacts on ocean mixed layer (2014)
  • Author(s): Y. Matsumura
  • Organizer: IGS International Symposium on Sea Ice in a Changing Environment
  • Place of Presentation: C3 Convention Centre, Australia
  • Year and Date: 2014-03-11
• [Presentation] 結氷過程の数値モデリングI (2013)
  • Author(s): 松村 義正
  • Organizer: 日本海洋学会秋季大会
  • Place of Presentation: 北海道大学学術交流会館, 札幌市
  • Year and Date: 2013-09-19
• [Presentation] 第4の南極底層水 : Cape Danley Bottom Water (2013)
  • Author(s): 大島 慶一郎
  • Organizer: 日本海洋学会秋季大会
  • Place of Presentation: 北海道大学学術交流会館, 札幌市
  • Year and Date: 2013-09-19
• [Presentation] ビンセネス湾沖で係留観測によって捉えた南極底層水の特性 (2012)
  • Author(s): 北出 裕二郎
  • Organizer: 第3回極域科学シンポジウム
  • Place of Presentation: 国立極地研究所, 立川市
  • Year and Date: 2012-11-29
• [Presentation] New findings of Antarctic Bottom Water : Ongoing warming/freshening and a discovered AABW source (2012)
  • Author(s): 大島 慶一郎
  • Organizer: 第3回極域科学シンポジウム
  • Place of Presentation: 国立極地研究所, 立川市
  • Year and Date: 2012-11-27
  • Invited
• [Presentation] ビンセネス湾沖で係留観測によって捉えた南極底層水の特性 (2012)
  • Author(s): 北出 裕二郎
  • Organizer: 日本海洋学会秋季大会
  • Place of Presentation: 東海大学, 静岡市
  • Year and Date: 2012-09-15
• [Presentation] ケープダンレープロジェクト-第4の南極底層水起源域の同定- (2012)
  • Author(s): 深町 康
  • Organizer: 日本海洋学会春季大会
  • Place of Presentation: 筑波大学第 2 エリア, つくば市
  • Year and Date: 2012-03-26
• [Presentation] 南極海ケープダンレーポリニヤにおける海氷・海洋の係留観測 (2011)
  • Author(s): 深町 康
  • Organizer: 第2回極域科学シンポジウム
  • Place of Presentation: 統計数理研究所, 立川市
  • Year and Date: 2011-11-17
• [Presentation] Mooring measurement of Antarctic Bottom Water export from the Cape Darnley Polynya and sea-ice thickness within this polynya (2011)
  • Author(s): Y. Fukamachi
  • Organizer: WCRP Open Science Conference
  • Place of Presentation: Sheraton Denver Downtown Hotel, USA
  • Year and Date: 2011-10-27
• [Presentation] 南極海ケープダンレーポリニヤにおける海氷・海洋の係留観測 (2011)
  • Author(s): 深町 康
  • Organizer: 日本海洋学会秋季大会
  • Place of Presentation: 九州大学筑紫キャンパス, 春日市
  • Year and Date: 2011-09-27
• [Presentation] Formation of Antarctic Bottom Water off Cape Darnley with huge sea ice production (2011)
  • Author(s): Ohshima, K. I.
  • Organizer: IUGG 2011
  • Place of Presentation: Melbourne Convention & Exhibition Centre, Australia
  • Year and Date: 2011-07-02
• [Remarks] 外部資金
  • URL: http://wwwoa.ees.hokudai.ac.jp/~yasuf/ext_fund.html