Gravity wave and the Quasi-biennial oscillation associated with tropospheric variability

• Project/Area Number: 20740280
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Meteorology/Physical oceanography/Hydrology
• Research Institution: Japan Agency for Marine-Earth Science and Technology
• Principal Investigator: KAWATANI Yoshio Japan Agency for Marine-Earth Science and Technology, 地球環境変動領域, 研究員 (00392960)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2010: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2009: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2008: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: 中層大気力学 / 重力波 / 赤道波 / 赤道準2年振動 / 対流圏変動 / 大気大循環モデル

Research Abstract

Equatorial trapped waves (EQWs) and internal gravity waves (GWs) generated by cumulus convections in the troposphere are investigated using an atmospheric general circulation model (AGCM). First, the mechanism of zonally non-uniform distribution of GWs and EQWs was clarified. Next, the roles of EQWs and GWs in driving the quasi-biennial oscillation (QBO) are analyzed. Finally, the QBO in a global warming climate is investigated. These results are published in Journals.

Research Products

• [Journal Article] The quasi-biennial oscillation in a double CO2 climate (2011)
  • Author(s): Yoshio Kawatani
  • Journal Title: Journal of the Atmospheric Sciences Volume: 68 Pages: 265-283
  • Peer Reviewed
• [Journal Article] The roles of equatorial trapped waves and internal inertia-gravity waves in driving the quasi-biennial oscillation. Part I: Zonal mean wave forcing. (2010)
  • Author(s): Kawatani, Y., K.Sato, T.J.Dunkerton, S.Watanabe, S.Miyahara, M.Takahashi.
  • Journal Title: J.Atmos. Sci. 67 Pages: 963-980
  • Peer Reviewed
• [Journal Article] The roles of equatorial trapped waves and internal inertia-gravity waves in driving the quasi-biennial oscillation. Part II: Three-dimensional distribution of wave forcing. (2010)
  • Author(s): Kawatani, Y., K.Sato, T.J.Dunkerton, S.Watanabe, S.Miyahara, M.Takahashi.
  • Journal Title: J.Atmos. Sci 67 Pages: 981-997
  • Peer Reviewed
• [Journal Article] The quasi-biennial oscillation in a double CO2 climate. (2010)
  • Author(s): Kawatani, Y., K.Hamilton, S.Watanabe.
  • Journal Title: J.Atmos. Sci. 68 Pages: 265-283
  • Peer Reviewed
• [Journal Article] The roles of equatorial trapped waves and internal inertia-gravity waves in driving the quasi-biennial oscillation. Part I : zonal mean wave forcing (2010)
  • Author(s): Yoshio Kawatani
  • Journal Title: Journal of the Atmospheric Sciences Volume: 67 Pages: 963-980
  • Peer Reviewed
• [Journal Article] The roles of equatorial trapped waves and internal inertia-gravity waves in driving the quasi-biennial oscillation. Part II : Three-dimensional distribution of wave forcing (2010)
  • Author(s): Yoshio Kawatani
  • Journal Title: Journal of the Atmospheric Sciences Volume: 67 Pages: 981-997
  • Peer Reviewed
• [Journal Article] The roles of equatorial trapped waves and internal inertia-gravity waves in driving the quasi-biennial oscllation. Part I : zonal mean wave forcing (2010)
  • Author(s): Kawatani, Y.
  • Journal Title: Jonrnal of the Atmospheric Sciences (印刷中)
  • Peer Reviewed
• [Journal Article] The roles of equatorial trapped waves and internal inertia-gravity waves in driving the quasi-biennial oscillation. Part II : Three-dimensional distribution of wave forcing (2010)
  • Author(s): Kawatani, Y.
  • Journal Title: Journal of the Atmospheric Sciences (印刷中)
  • Peer Reviewed
• [Journal Article] Global distribution of atmospheric waves in the equatorial upper troposphere and lower stratosphere: AGCM simulation of sources and propagation. (2009)
  • Author(s): Kawatani, Y., M.Takahashi, K.Sato, S.P.Alexander, T.Tsuda.
  • Journal Title: J.Geophys. Res. 114
  • Peer Reviewed
• [Journal Article] Global distribution of atmospheric waves in the equatorial upper troposphere and lower stratosphere: AGCM simulation of sources and propagation (2009)
  • Author(s): Kawatani, Y.
  • Journal Title: Journal of Geophysical Research 114
  • Peer Reviewed
• [Presentation] The quasi-biennial oscillation in a double CO2 climate. (2011)
  • Author(s): 河谷芳雄
  • Organizer: AGU Chapman Conference on Atmospheric Gravity Waves and Their Effects on General Circulation and Climate.
  • Place of Presentation: Honolulu, USA
  • Year and Date: 2011-03-02
• [Presentation] The quasi-biennial oscillation in a double CO2 climate (2011)
  • Author(s): Yoshio Kawatani
  • Organizer: AGU Chapman Conference on Atmospheric Gravity Waves and Their Effects on General Circulation and Climate
  • Place of Presentation: アメリカ、ホノルル、East-West center
  • Year and Date: 2011-03-02
• [Presentation] 地球温暖化時の赤道準2年振動 (2010)
  • Author(s): 河谷芳雄
  • Organizer: 日本気象学会秋季大会
  • Place of Presentation: 京都市、京都テルサ
  • Year and Date: 2010-10-25
• [Presentation] 地球温暖化時のQBO (2010)
  • Author(s): 河谷芳雄
  • Organizer: 第4回赤道大気レーダーシンポジウム
  • Place of Presentation: 宇治市、京都大学宇治おうばくプラザ
  • Year and Date: 2010-09-01
• [Presentation] Gravity waves and the QBO in the global warming climate (2010)
  • Author(s): Yoshio Kawatani
  • Organizer: 2010 The Meeting of the Americas
  • Place of Presentation: ブラジル、イグアフフォールズ、Rafain Hotel and Convention Center
  • Year and Date: 2010-08-09
• [Presentation] The roles of equatorial trapped waves and internal inertia-gravity waves in driving the quasi Biennial oscillation (2010)
  • Author(s): Yoshio Kawatani
  • Organizer: 地球惑星科学連合2010年度連合大会
  • Place of Presentation: 千葉市、幕張メッセ国際会議場
  • Year and Date: 2010-05-28
• [Presentation] The roles of 3-dimensional propagating gravity waves and equatorial trapped gravity waves on driving the Quasi Biennial Oscillation : A study of high reso lution atmospheric general circulation model. (2009)
  • Author(s): 河谷芳雄
  • Organizer: 17th Conference on Atmospheric and Oceanic Fluid Dynamics and 15th Conference on Middle Atmosphere
  • Place of Presentation: Stowe, USA
  • Year and Date: 2009-06-10
• [Presentation] The roles of 3-dimensional propagating gravity waves and equatorial trapped gravity waves on driving the Quasi Biennial Oscillation : A study of high resolution atmospheric general circulation model (2009)
  • Author(s): Yoshio Kawatani
  • Organizer: 17th Conference on Atmospheric and Oceanic Fluid Dynamics and 15th Conference on Middle Atmosphere
  • Place of Presentation: アメリカ、ストー、Stoweflake Mountain Resort and Spa
  • Year and Date: 2009-06-10
• [Presentation] Global distribution of atmospheric waves in the equatorial upper troposphere and lower stratosphere : AGCM simulation of sources and propagation (2009)
  • Author(s): Yoshio Kawatani
  • Organizer: EGU General Assembly 2009
  • Place of Presentation: オーストリア、ウィーン、Austria Center Vienna
  • Year and Date: 2009-04-20
• [Presentation] The roles of 3-dimensional propagating gravity waves and equatorial trapped gravity waves on driving the Quasi Biennial Oscillation. (2008)
  • Author(s): 河谷芳雄
  • Organizer: 4th SPARC General Assembly
  • Place of Presentation: Bologna, Italy
  • Year and Date: 2008-09-01