Global mapping and monitoring of sea ice production

2010 Fiscal Year Self-evaluation Report

• Project/Area Number: 20221001
• Research Category: Grant-in-Aid for Scientific Research (S)
• Allocation Type: Single-year Grants
• Research Field: Environmental dynamic analysis
• Research Institution: Hokkaido University
• Principal Investigator: OHSHIMA Kiichiro Hokkaido University, 低温科学研究所, 教授 (30185251)
• Project Period (FY): 2008 – 2012
• Keywords: 海氷生成 / 沿岸ポリニヤ / 熱塩フラックス / マイクロ波放射計 / 南極底層水 / 海洋熱塩循環

Research Abstract

海洋の大規模な中深層循環は極域・海氷域から重い水が沈み込み、それが徐々に湧き上がってくるという密度(熱塩)循環である。海氷生成の際にはき出される高塩分水が重い水の生成源になっている。本研究の目的は、海洋中深層循環及びその変動を決めうる重要な因子である海氷生産量を、現場観測に基づいて衛星データ等から見積もるアルゴリズムを開発し、そのグローバルマッピングを行うことである。さらに海氷生産量と中深層水形成の関係をその変動を含めて理解することもめざす。

Research Products

• [Journal Article] Estimation of surface heat/salt fluxes associated with sea ice growth/melt in the Southern Ocean (2011)
  • Author(s): Tamura, T., K.I.Ohshima, S.Nihashi, H.Hasumi
  • Journal Title: SOLA 7 Pages: 7-20, doi:1O.2151/sola.2011-005.
  • Peer Reviewed
• [Journal Article] Strong export of Antarctic Bottom Water east of the Kerguelen plateau (2010)
  • Author(s): Fukamachi, Y., S.R.Rintoul, J.A.Church, S.Aoki
  • Journal Title: Nature Geoscience 3 Pages: 327-331
  • Peer Reviewed
• [Journal Article] Thickness and production of sea ice in the Okhotsk Sea coastal polynyas from AMSR-E (2009)
  • Author(s): Nihashi, S., K.I.Ohshima, T.Tamura, Y.Fukamachi, S.Saitoh
  • Journal Title: J.Geophys.Res. 114 Pages: C10025, doi :10.10 29/2008JO005222.
  • Peer Reviewed
• [Journal Article] Direct observations of sea-ice thickness and brine rejection off Sakhalin in the Sea of Okhotsk, Cont. (2009)
  • Author(s): Fukamachi, Y. , K.Shirasawa, A.M.Polomoshnov, K.I.Ohshima
  • Journal Title: Shelf Res. 29 Pages: doi:1O.1O16/j.csr 2009.04.005,1541-1548.
  • Peer Reviewed
• [Journal Article] Mapping of sea ice production for Antarctic coastal polynyas (2008)
  • Author(s): Tamura, T., K.I.Ohshima, S.Nihashi
  • Journal Title: Geophys.Res.Lett. 35 Pages: L07606, doi :10.1029/200 7GLO329O3.
  • Peer Reviewed
• [Presentation] Antarctic Bottom Water revealed by mooring measurements off Cape Darnley,Antarctica (2010)
  • Author(s): Fukamachi, Y., K.I.Ohshima, S.Aoki, Y.Kitade, T.Tamura, M.Wakatsuchi
  • Organizer: IPY Oslo Science Conference
  • Place of Presentation: Oslo (Norway)
  • Year and Date: 2010-06-09
• [Presentation] Global mapping of sea ice production and surface heat/salt-flux in the sea ice region (2010)
  • Author(s): Tamura, T., K.I.Ohshima, S.Nihashi
  • Organizer: IGS Int.Symp.on Sea Ice in Phys.Bio.System
  • Place of Presentation: Tromso (Norway)
  • Year and Date: 2010-06-02
• [Presentation] Mapping and interannual variations of sea-ice thickness in the Okhotsk Sea inferred from ocean salinity profile in spring (2010)
  • Author(s): Ohshima, K.I., S.C.Riser
  • Organizer: IGS Int.Symp.on Sea Ice in Phys.Bio.System
  • Place of Presentation: Tromso (Norway)
  • Year and Date: 2010-06-01
• [Presentation] 両極域における海洋-海氷変動と温暖化 (2010)
  • Author(s): 大島慶一郎
  • Organizer: 国際極年2007-2008シンポジウムー地球規模の変動現象と極域の役割り-,日本学術会議
  • Place of Presentation: 国立極地研究所,東京
  • Year and Date: 2010-03-01
• [Presentation] Sea ice production in the polynya and the associated bottom water formation off the Cape Darnley, East Antarctica (2009)
  • Author(s): Ohshima, K.I., T.Tamura, Y.Fukamachi, S.Aoki
  • Organizer: 9th Int.Conf.SH.Meteorol.Oceanogr.
  • Place of Presentation: Melbourne(Australia)
  • Year and Date: 20090209-20090213
• [Book] 自然と科学の情報誌「ミルシル」(海洋深層循環を駆動する南極底層水-未知の底層水生成域を探る-) (2010)
  • Author(s): 大島慶一郎
  • Total Pages: 9-11
• [Book] 月刊海洋(南大洋の深層水形成と海氷過程) (2010)
  • Author(s): 大島慶一郎・羽角博康編集
  • Total Pages: 150
• [Remarks]
  • URL: http://wwwod.lowtem.hokudai.ac.jp/~ohshima/kaken.htm
• [Remarks] 南大洋の海氷生産量と熱塩フラックスのグリッドデータセットを以下のサイトで公表
  • URL: http://wwwod.lowtem.hokudai.ac.jp/polar-seaflux/
• [Remarks] 日本気象学会2008年度堀内賞受賞(大島慶一郎:海氷の気候システムに果たす役割に関する研究)