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2008 Fiscal Year Annual Research Report

熱帯の気候変動モードの長期変調と海の温暖化現象に関する研究

Research Project

Project/Area Number 20340125
Research InstitutionGunma University

Principal Investigator

山形 俊男  Gunma University, 大学院・理学系研究科, 教授 (50091400)

Co-Investigator(Kenkyū-buntansha) 升本 順夫  東京大学, 大学院・理学系研究科, 准教授 (60222436)
東塚 知己  東京大学, 大学院・理学系研究科, 助教 (40376538)
Keywords気候変動 / ダイポールモード現象 / 地球温暖化 / インド洋 / セーシェルドーム / 大気海洋結合モデル
Research Abstract

今年度に実施した主な研究成果は、以下の通りである。
1.インド洋熱帯域の気候変動モードであるダイポールモード現象の長期変調を調べるため、過去約300年間の温室効果ガス、太陽定数、植生等を用いて、大気海洋結合モデルによる再現実験を行った。来年度は、このモデル結果の解析を行う予定である。
2.CMIP3に登録されている22個の大気海洋結合モデルによるセーシェルドーム(南西インド洋熱帯域の大規模湧昇ドーム現象)の再現性を調べた。ドームそのものは再現されているものの、観測データに見られる半年周期性が、多くのモデルで再現できていなかった。また、その原因は、インドモンスーンの非対称性(夏季モンスーンの方が冬季モンスーンに比べ、強く、期間が短い)が再現できていないためであることもわかった。
3.ケニア沖で得られた珊瑚礁のコアデータより、過去約130年間のダイポールモード現象を復元することに成功した。最近50年間については、観測データと整合的であることが確認された。
4.ダイポールモード現象のテレコネクション(遠隔地への影響)により、チベット高原では、低気圧性偏差が形成されて、水蒸気フラックスの収束が起こるため、正のイベントの年に積雪面積が異常に拡大することが明らかになった。
5.大西洋熱帯域の気候変動モードである南北モードとギニアドームの関係を高解像度海洋大循環モデルの結果の解析により調べた。その結果、ギニアドームが南北モードの減衰に重要な役割を果たしている可能性が示唆された

  • Research Products

    (51 results)

All 2009 2008

All Journal Article (22 results) (of which Peer Reviewed: 19 results) Presentation (29 results)

  • [Journal Article] Anomalous winter climate conditions in the Pacific rim during recent El Nifto Modoki and El Nifio events2009

    • Author(s)
      Weng, H.
    • Journal Title

      Climate Dynamics 32

      Pages: 663-674

    • Peer Reviewed
  • [Journal Article] An introduction to the. South China Sea throughflow: Its dynamics, variability, and application for climate2009

    • Author(s)
      Qu, T.
    • Journal Title

      Dynamics of Atmospheres and Oceans 47

      Pages: 2-14

    • Peer Reviewed
  • [Journal Article] Respective influences of IOD and ENSO on the Tibetan snow cover in early winter2009

    • Author(s)
      Yuan, C.
    • Journal Title

      Climate Dynamics (印刷中)(掲截確定)

    • Peer Reviewed
  • [Journal Article] Advance and prospectus of seasonal prediction: assessment of the APCGC1113AS 14-model ensemble retrospective seasonal prediction (1980 - 2004)2009

    • Author(s)
      Wang, B.
    • Journal Title

      Climate Dynamics (印刷中)(掲截確定)

    • Peer Reviewed
  • [Journal Article] Process Studies and Seasonal Prediction Experiment Using Coupled General Circulation Mo del2009

    • Author(s)
      Yamagata, T.
    • Journal Title

      Earth Science (印刷中)(掲截確定)

    • Peer Reviewed
  • [Journal Article] 熱帯の気候変動とテレコネクション2009

    • Author(s)
      山形俊男
    • Journal Title

      東京理科大科学フォーラム 2月号

      Pages: 20-26

  • [Journal Article] インド洋に現われる大気海洋相互作用と地球環境のかかわり2009

    • Author(s)
      山形俊男
    • Journal Title

      大気の鼓動を聴く

      Pages: 57-73

  • [Journal Article] The Unusual IOD Event of 20072008

    • Author(s)
      Behera, S.
    • Journal Title

      Geophysical Research Letters 35

      Pages: L14S11

    • Peer Reviewed
  • [Journal Article] anent status of ENSO prediction skill in coupled ocean-atmosphere models2008

    • Author(s)
      Jin, E. K
    • Journal Title

      Climate Dynamics 31

      Pages: 647-664

    • Peer Reviewed
  • [Journal Article] Successful prediction of the consecutive IOD in 2006 and 20072008

    • Author(s)
      Luo, J.-J.
    • Journal Title

      Geophysical Research Letters 35

      Pages: L14S02

    • Peer Reviewed
  • [Journal Article] How accurately do coupled climate models predict the Asian-Australia monsoon interannual variability?2008

    • Author(s)
      Wang, B.
    • Journal Title

      Climate Dynamics 30

      Pages: 605-619

    • Peer Reviewed
  • [Journal Article] The role of the western Arabian Sea Upwelling in Indian Monsoon Rainfall Variability2008

    • Author(s)
      Immo, T.
    • Journal Title

      Journal of Climate 21

      Pages: 5603-5623

    • Peer Reviewed
  • [Journal Article] Influence of Indian Ocean Dipole on Poleward Propagation of Boreal Summer Intraseasonal Oscillations2008

    • Author(s)
      Ajayamohan, R. S.
    • Journal Title

      Joumal of Climate 21

      Pages: 5437-5454

    • Peer Reviewed
  • [Journal Article] Indian Ocean Dipole influence on South American rainfall2008

    • Author(s)
      Chan, S. C.
    • Journal Title

      Geophysical Research Letters 35

      Pages: L14S12

    • Peer Reviewed
  • [Journal Article] Seasonal variation of the Seychelles Dome2008

    • Author(s)
      Yokoi, T.
    • Journal Title

      Journal of Climate 21

      Pages: 3740-3754

    • Peer Reviewed
  • [Journal Article] Impact of Indian Ocean Dipole on intraseasonal zonal currents at 90E on the equator as revealed by self-organizing maps2008

    • Author(s)
      Iskandar, I
    • Journal Title

      Geophysical Research Letters 35

      Pages: L14S03

    • Peer Reviewed
  • [Journal Article] Semiannual variation in the western tropical Pacific Ocean2008

    • Author(s)
      Qu, T.
    • Journal Title

      eophysical Research Letters 35

      Pages: L16602

    • Peer Reviewed
  • [Journal Article] Impacts of the South China Sea throughflow on seasonal and interannual variations of the Indonesian Throughflow2008

    • Author(s)
      Tozuka, T.
    • Journal Title

      Dynamics of Atmospheres and Oceans 47

      Pages: 73-85

    • Peer Reviewed
  • [Journal Article] High-resolution Indian Ocean Simulations -Recent advances and issues from OFES-2008

    • Author(s)
      Masumoto, Y.
    • Journal Title

      AGU Monograph "Ocean Modeling in an Eddying Regime" M. Hecht and H. Hasumi, Ed., 177

      Pages: 199-211

    • Peer Reviewed
  • [Journal Article] Intraseasonal meridional current variability in the eastern equatorial Indian Ocean2008

    • Author(s)
      Ogata, T.
    • Journal Title

      Journal of Geophysical Research 113

      Pages: C07037

    • Peer Reviewed
  • [Journal Article] Seasonal variations of the Seychelles Dome simulated in the CMIP3 models2008

    • Author(s)
      Yokoi, T.
    • Journal Title

      Journal of Physical Oceanography 39

      Pages: 449-457

    • Peer Reviewed
  • [Journal Article] 気候の問題を考える2008

    • Author(s)
      山形俊男
    • Journal Title

      Ship & Ocean Newsletter(海洋政策研究財団) 200号

      Pages: 6-7

  • [Presentation] 海の温暖化と異常気象2009

    • Author(s)
      山形俊男
    • Organizer
      富山大学研究推進フォーラム、環境編第1回シンポジウム「高低差4,000mからの警鐘-地域の自然から地球環境と循環型社会を考える-」
    • Place of Presentation
      富山大学
    • Year and Date
      2009-03-09
  • [Presentation] Prediction of climate variations and its application in the southern African region2009

    • Author(s)
      Tozuka, T.
    • Organizer
      Southwestern Indian Ocean Workshop
    • Place of Presentation
      IFM-GEOMAR(ドイツ)
    • Year and Date
      2009-03-02
  • [Presentation] IOD, ENSO and their Interactions2009

    • Author(s)
      Yamagata, T.
    • Organizer
      Workshop on Modeling : the Ocean dynamics, Syntheses and Prediction
    • Place of Presentation
      Taipei, Taiwan
    • Year and Date
      2009-02-24
  • [Presentation] Importance of Ocean Research for Sustainability under the Global Warming Stress - A Dvnamicist's View2009

    • Author(s)
      Yamagata, T.
    • Organizer
      First JSPS Ocean Research Workshop in 2009 - Fut ure Collaboration Beyond the JSPS "Coastal Marine Science" program-
    • Place of Presentation
      Ocean Research Institute, The University of Tokyo
    • Year and Date
      2009-02-14
  • [Presentation] Scientific Aspects of Sea Level Rise in the Central Tropical Pacific2009

    • Author(s)
      Yamagata, T.
    • Organizer
      島と海に関するシンポジウム
    • Place of Presentation
      東京(海洋政策研究財団)
    • Year and Date
      2009-01-22
  • [Presentation] Seasonal variation ofthe Seychelles Dome2008

    • Author(s)
      Takaaki Yokoi
    • Organizer
      MISMOワークショップ
    • Place of Presentation
      海洋研究開発機構、横浜
    • Year and Date
      20081115-16
  • [Presentation] 異常気象と気候変動を予測する一変動に強い社会の構築を目指して-2008

    • Author(s)
      山形俊男
    • Organizer
      第13回地球大学アドバンス
    • Place of Presentation
      東京
    • Year and Date
      2008-12-19
  • [Presentation] Recent consecutive IODs and IOD experimental forecasts2008

    • Author(s)
      Masumoto, Y.
    • Organizer
      IOGOOS Workshop and Sixth Annual Meeting (IOGOOS-VI)
    • Place of Presentation
      Hyderabad, India
    • Year and Date
      2008-12-03
  • [Presentation] Influences of IOD and ENSO on the Tibetan Snow Cover in Early Winter2008

    • Author(s)
      袁潮霞
    • Organizer
      日本気象学会2008秋季大会
    • Place of Presentation
      仙台
    • Year and Date
      2008-11-20
  • [Presentation] Impacts of the South China Sea Throughflow on the Indonesian Throughflow2008

    • Author(s)
      Tozuka, T.
    • Organizer
      Mini-workshop on climate modeling
    • Place of Presentation
      東京大学
    • Year and Date
      2008-11-13
  • [Presentation] Atlantic Meridional Mode and its link with the Guinea Dome2008

    • Author(s)
      Takeshi Doi
    • Organizer
      Mini-workshop on Climate Modeling
    • Place of Presentation
      The University of Tokyo
    • Year and Date
      2008-11-13
  • [Presentation] Toward predicting climate variations for disaster prevention under the global warming stress2008

    • Author(s)
      Yamagata, T.
    • Organizer
      Towards a comprehensive security for seas and oceans: the Hiroshima Initiative
    • Place of Presentation
      Hiroshima(ユニタール)
    • Year and Date
      2008-09-30
  • [Presentation] 南インド洋における気候変動モード2008

    • Author(s)
      森岡優志
    • Organizer
      日本海洋学会秋季大会
    • Place of Presentation
      広島国際大学
    • Year and Date
      2008-09-26
  • [Presentation] 南シナ海通過流がインドネシア通過流の経年変動に与える影響2008

    • Author(s)
      東塚知己
    • Organizer
      2008年日本海洋学会秋季大会
    • Place of Presentation
      広島国際大学
    • Year and Date
      2008-09-25
  • [Presentation] スリランカ東方沖およびミンダナオ東方沖における季節内変動の経年変調2008

    • Author(s)
      尾形友道
    • Organizer
      2008年度日本海洋学会秋季大会
    • Place of Presentation
      広島国際大学
    • Year and Date
      2008-09-25
  • [Presentation] 異常気象と気候変動2008

    • Author(s)
      山形俊男
    • Organizer
      九州大学・福岡女子大学・西南学院大学国・公・私三大学共同シンポジウム福岡から考える環境問題
    • Place of Presentation
      福岡
    • Year and Date
      2008-09-03
  • [Presentation] Indian Ocean Dipole and its possible link with climate modes in the Pacific2008

    • Author(s)
      yamagata, T.
    • Organizer
      ICTAM2008 (22nd Intanational Congtrss of Theoretical and Applied Mecharics)
    • Place of Presentation
      Adelaide, Australia
    • Year and Date
      2008-08-28
  • [Presentation] Indonesian Throughflow in OFES2008

    • Author(s)
      Masumoto, Y.
    • Organizer
      OFES International Workshop
    • Place of Presentation
      Yokohama
    • Year and Date
      2008-08-26
  • [Presentation] Seasonal and interannual variations of oceanic conditions in the tropical Atlantic2008

    • Author(s)
      Takeshi Doi
    • Organizer
      OFES international workshop
    • Place of Presentation
      Yokohama
    • Year and Date
      2008-08-26
  • [Presentation] Respective Influences of IOD and ENSO on the Tibetan Snow Cover in Early Winter2008

    • Author(s)
      Yuan, C., T. Tozuka, T. Miyasaka and T. Yamagata
    • Organizer
      2008 Western Pacific Geophysics Meeting
    • Place of Presentation
      Cairns, Australia
    • Year and Date
      2008-07-30
  • [Presentation] Tropical Indian Ocean climate variability revealed by self-organizing maps2008

    • Author(s)
      Tozuka, T.
    • Organizer
      Western Pacific Geophysics Meeting 2008
    • Place of Presentation
      ケアンズ(オーストラリア)
    • Year and Date
      2008-07-30
  • [Presentation] Interannual modulation of intraseasonal variability in the southeastern tropical Indian Ocean2008

    • Author(s)
      T. Ogata
    • Organizer
      Western Pacific Geophysics Meeting
    • Place of Presentation
      Cairns, Australia
    • Year and Date
      2008-07-30
  • [Presentation] Seasonal variation ofthe Seychelles Dome2008

    • Author(s)
      Takaaki Yokoi
    • Organizer
      Western Pacific Geophysics Meeting
    • Place of Presentation
      Cairns, Australia
    • Year and Date
      2008-07-30
  • [Presentation] Influences of the South China Sea Throughflow on seasonal and interannual variations of the Indonesian Throughflow2008

    • Author(s)
      Tozuka, T.
    • Organizer
      Western Pacific Geophysics Meeting 2008
    • Place of Presentation
      ケアンズ(オーストラリア)
    • Year and Date
      2008-07-29
  • [Presentation] Indian Ocean Dipole Modes2008

    • Author(s)
      Masumoto, Y.
    • Organizer
      BPPT-JAMSTEC Workshop on Moored Buoy Observation in the Indo-Pacific Region: Climate Research and its Social Benefits
    • Place of Presentation
      Jakarta, Indonesia.
    • Year and Date
      2008-07-28
  • [Presentation] Influences of IOD and ENSO on the snow cover in Tibet during early winter2008

    • Author(s)
      Yuan, C.
    • Organizer
      IPRC Lunchtime Discussion
    • Place of Presentation
      IPRC, Hawaii
    • Year and Date
      2008-06-26
  • [Presentation] Impacts of the South China Sea Throughflow on seasonal and interannual variations of the Indonesian Throughflow2008

    • Author(s)
      Tozuka, T.
    • Organizer
      INSTANT workshop
    • Place of Presentation
      コロンビア大学(米国)
    • Year and Date
      2008-05-29
  • [Presentation] TIT as simulated in OFES and inter-comparison with INSTANT results2008

    • Author(s)
      Masumoto,Y.
    • Organizer
      INSTANT Model Workshop
    • Place of Presentation
      Lamont, New York
    • Year and Date
      2008-05-28
  • [Presentation] Indian Ocean Dipole and Climate Variations2008

    • Author(s)
      Yamagata, T.
    • Organizer
      13th Japanese-German Symposium (Marine Research, The Importance of Oceans for mankind)
    • Place of Presentation
      Rostock, Germany
    • Year and Date
      2008-05-16

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Published: 2010-06-11   Modified: 2016-04-21  

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