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2011 Fiscal Year Final Research Report

Interannual and decadal variations of shallow meridional overturning cells in the Indian Ocean

Research Project

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Project/Area Number 21540450
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Meteorology/Physical oceanography/Hydrology
Research InstitutionJapan Agency for Marine-Earth Science and Technology (2010-2011)
The University of Tokyo (2009)

Principal Investigator

MASUMOTO Yukio  独立行政法人海洋研究開発機構, 地球環境変動領域, プログラムディレクター (60222436)

Project Period (FY) 2009 – 2011
Keywordsインド洋 / 浅い南北循環セル / 十年規模変動 / インドネシア通過流
Research Abstract

Decadal variations of shallow meridional overturning cells in the Indian Ocean and their possible mechanisms are investigated using results from a high-resolution ocean general circulation model and a series of sensitivity studies with simplified numerical models. It turns out that the southern tropical cell is divided into two parts. A northern part, north of 10°S, is strongly affected by variations of wind stress curl over the Indian Ocean and weakened(strengthened) during 1990s(2000s). On the other hand, a southern part between 10°S and 30°S strengthened(weakened) during 1990s(2000s). The Indonesian throughflow may be an important factor affecting the variations in the southern part of the southern tropical cell.

  • Research Products

    (10 results)

All 2012 2011 2010 2009

All Journal Article (4 results) (of which Peer Reviewed: 4 results) Presentation (6 results)

  • [Journal Article] Interannual modulation and its dynamics of the mesoscale eddy variability in the southeastern tropical Indian Ocean2011

    • Author(s)
      Ogata, T. and Y. Masumoto
    • Journal Title

      J. Geophys., Res

      Volume: 116 Pages: C05005

    • DOI

      doi:10.1029/2010JC006490.

    • Peer Reviewed
  • [Journal Article] Basin resonances in the equatorial Indian Ocean2011

    • Author(s)
      Han, W., J. P. McCreary, Y. Masumoto, J. Vialard, and B. Duncan
    • Journal Title

      J. Phys. Oceanogr

      Volume: 41 Pages: 1252-1270

    • DOI

      doi:10.1175/2011JPO4591.1

    • Peer Reviewed
  • [Journal Article] The reversal of the multi-decadal trends of the equatorial Pacific easterly winds, and the Indonesian Throughflow and Leeuwin Current transports2011

    • Author(s)
      Feng, M., C. Boning, A. Biastoch, E. Behrens, E. Weller, and Y. Masumoto
    • Journal Title

      Geophys. Res. Lettr

      Volume: 38 Pages: L11604

    • DOI

      doi:10.1029/2011GL047291

    • Peer Reviewed
  • [Journal Article] Subsurface equatorial zonal current in the eastern Indian Ocean2009

    • Author(s)
      Iskandar, I., Y. Masumoto, and K. Mizuno
    • Journal Title

      J. Geophys. Res

      Volume: 114 Pages: C06005

    • DOI

      doi:10.1029/2008JC005188.

    • Peer Reviewed
  • [Presentation] Effects of enhanced vertical mixing in the Indonesian Seas on the local water mass properties and large-scale ocean circulation in the Indo-Pacific ocean2012

    • Author(s)
      Y. Masumoto and Y. Urabe
    • Organizer
      ocean circulation in the Indo-Pacific ocean, International Workshop on Developing an Effective Monitoring Program of the Indonesian Throughflow
    • Place of Presentation
      Jakarta, Indonesia
    • Year and Date
      2012-03-12
  • [Presentation] Recent research highlights from tropical ocean observing system in the Indian Ocean2011

    • Author(s)
      Y. Masumoto, W. Yu, G. Meyers
    • Organizer
      2011 IUGG General Assembly
    • Place of Presentation
      Melbourne, Australia
    • Year and Date
      2011-07-02
  • [Presentation] Effects of enhanced vertical mixing in the Indonesian Seas on the local water mass properties and large-scale ocean circulation in the Indo-Pacific region2011

    • Author(s)
      Y. Masumoto and Y. Urabe
    • Organizer
      2nd International Workshop on Climate Change Sciences and Modeling
    • Place of Presentation
      Ansan, Korea
    • Year and Date
      2011-06-20
  • [Presentation] Decadal variations in the southern tropical Indian Ocean : A case study for 1990s2011

    • Author(s)
      Y. Masumoto and A. Tanabe
    • Organizer
      JpGU International Symposium 2011
    • Place of Presentation
      Makuhari Messe, Chiba
    • Year and Date
      2011-05-27
  • [Presentation] The Indian Ocean Climate Variability2010

    • Author(s)
      Y. Masumoto
    • Organizer
      SATREPS Workshop on Seasonal and Inter-Annual Climate Variability
    • Place of Presentation
      Cape Town, South Africa
    • Year and Date
      2010-08-25
  • [Presentation] Decadal variations in the shallow meridional overturning cell in the southern tropical Indian Ocean2009

    • Author(s)
      Y. Masumoto
    • Organizer
      Second OFES International Workshop and ESC-IPRC Joint Workshop on Computationally-Intensive Modeling of the Climate System
    • Place of Presentation
      Honolulu, Hawaii
    • Year and Date
      2009-12-09

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Published: 2013-07-31  

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