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Studv of unusual waether regimes in the summers of 1993 and 1994

Research Project

Project/Area Number 07304069
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section総合
Research Field Meteorology/Physical oceanography/Hydrology
Research InstitutionUniversity of Tsukuba

Principal Investigator

YASUNARI Tetsuzo  Univ.of Tsukuba, Inst.Geoscience, Prof., 地球科学系, 教授 (80115956)

Co-Investigator(Kenkyū-buntansha) NISHIMORI Motoki  Res.Assoc., 大学院・理学系研究科, 助手 (40282305)
TANAKA Hiroshi  Lectur., 大学院・理学系研究科, 講師 (70236628)
NAKAMURA Hisashi  Univ.of Tokyo, Gradu.Sch., Lectur., 大学院・理学系研究科, 講師 (10251406)
KIMOTO Masahide  Univ.of Tokyo, Cent.Cli.Sys.Res., Asso.Prof., 気候システム研究センター, 助教授 (30262166)
NITTA Tsuyoshi  Univ.of Tokyo, Cent.Cli.Sys.Res., Prof., 気候システム研究センター, 教授 (00014762)
松山 洋  東京都立大, 理学部, 助手 (50264586)
加藤 内蔵進  名大, 大気水圏科学研究所, 助手 (90191981)
力石 國男  弘前大, 理学部, 教授 (70038561)
山形 俊男  東大, 大学院・理学系研究科, 教授 (50091400)
松野 太郎  北大, 大学院・地球環境科学研究科, 教授 (40037172)
向川 均  北海道大学, 地球環境研究科, 助教授 (20261349)
Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥5,800,000 (Direct Cost: ¥5,800,000)
Fiscal Year 1996: ¥5,800,000 (Direct Cost: ¥5,800,000)
KeywordsClimate Change / Unusual Weather / Cool Summer / Hot Summer / Atmosphere-Ocean System / Sea surface Temperature / General Circulation Model / Tropical Zone / ENSO
Research Abstract

The cause of the unusual and wet summer of 1993 and the unusual hot and dry summer of 1994 are clarified based on the detailed data analysis and the theoretical consideration by using the general circulation model. It is documented that the unusual weather in both summers are considerably affected by the tropical atmosphere-ocean system. In addition, it is confirmed that air temperature shows remarkable decrease due to the appearance of sub-polar jet stream in the lower troposphere over Siberia and the developing of the Blocking High over the Sea of Okhotsk in 1993. It is also found that summer precipitation increase as the result that the Baiu Front. is intensified by the large north-south temperature gradient around Japan. In 1994, it is clear that the increase of surface temperature is amplified due to the eastward migration of Tibetan High and the local surface dryness. These analytical results in both summers are almost supported by the climatological simulation by using general circulation model. Especially, it is shown that spatial distribution of sea surface temperature in the western tropical Pacific in the two years are slightly different, From the examination by using longer climatic data, it is found that the range of temperature change is large in 1950s-60s and after 1980s. We also obtain the result that the global atmosphere-ocean system affecting summer temperature in Japan is different between before 1970s and after 1980s.

Report

(3 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • Research Products

    (14 results)

All Other

All Publications (14 results)

  • [Publications] 安成哲三: "1993年/94年夏の異常気象の解明" 気象研究ノート. 189. 1-290 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Fujibe,F.,: "Boundary layer features of the 1994 hot sumner in Japan" Meteor.Soc.Japan. 74. 259-272 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 力石 國男他: "北極海の海氷分布の変動と北日本の冷夏" 月刊 海洋. 28. 9-15 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 山崎 孝治: "海氷が大気循環に及ぼす影響" 月刊 海洋. 28. 563-566 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Honda,M.他: "The influence of the Okhotsk sea-ice extent on the afmospheric circulation" Geophys.Res.Lett.in printed.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Fujibe, F.: "Boundary layer features of the 1994 hot summer in Japan." J.Meteor.Soc.Japan. 74. 259-272 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Honda, M., K.Yamazaki, Y.Tachibana and K.Takeuchi: "The influence of the Okhotsk sea-ice extent on the atmospheric circulation." (submited to Geophys.Res.Lett.). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Tomita,T.and T.Yasunari: "Role of the Northeast Winter Monsoon on the Biennial oscillation of the ENSO/Monsoon System" J.Meteor,Soc.Japan,. 74-4. 399-413 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Ueda,H.and T.Yasunari: "Maturing Process of the Summer Monsoon Over the Western North Pacific...A Coupled Ocean/Atmosphere System." J.Meteor.Soc.Japan. 74-4. 493-508 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 安成 哲三: "アジアモンスーン/ENSO研究をめぐる世界の動向" 地球環境. 1. 41-48 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Tanaka,H.L.,Kimura and T.Yasunari: "Time Spectral Analysis for the Natural Variability of the Barotropic Model Atmosphere with Annual Cycle Forcing." J.Meteor.Soc.Japan. 74-6. 909-921 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Tanaka,H.L.,R.Kanohgi and T.Yasunari: "Notes and Conrespondence Recent Aprupt Intensification of the Northern Polar Vortex since 1988." J.Meteor.Soc.Japan. 74-5. 947-954 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 安成哲三,西森基貴: "気候変動の長期傾向からみた1994年の暑い夏" 日本気象学会春季大会シンポジウム講演予稿集. 8-16 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Ueda, H., T. Yasunari and R. Kawamura: "Abrupt seasonal change of large-scale convective activity over the western Pacific." J. Metecr. Soc. Japan. 73. 795-809 (1995)

    • Related Report
      1995 Annual Research Report

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Published: 1996-04-01   Modified: 2017-10-10  

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