Mechanism of the Quasi-Biennial Oscillation modulation associated with climate change

2017 Fiscal Year Final Research Report

• Project/Area Number: 26287117
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Meteorology/Physical oceanography/Hydrology
• Research Institution: Japan Agency for Marine-Earth Science and Technology
• Principal Investigator: KAWATANI Yoshio 国立研究開発法人海洋研究開発機構, 統合的気候変動予測研究分野, 主任研究員 (00392960)
• Co-Investigator(Kenkyū-buntansha): 宮崎 和幸 国立研究開発法人海洋研究開発機構, 地球環境観測研究開発センター, 主任研究員 (30435838) ; 藤原 正智 北海道大学, 地球環境科学研究院, 准教授 (00360941)
• Co-Investigator(Renkei-kenkyūsha): WATANABE Shingo 国立研究開発法人海洋研究開発機構, シームレス環境予測研究分野, 分野長 (50371745) ; SATO Kaoru 東京大学, 理学系研究院, 教授 (90251496)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: 赤道準2年振動 / 成層圏子午面循環

Outline of Final Research Achievements

The Quasi-biennial oscillation (QBO) and semi-annual oscillation (SAO) was successfully simulated by the climate model without non-stationary gravity wave parameterization. The mechanism of interannual variability of stratospheric water vapor was clarified by analyzing the climate model and satellite data. The experiments of the QBO modulation in a future climate were done following the international project, and modulations of the QBO were investigated.
We participated in the stratosphere reanalyses intercomparison project (S-RIP). Several studies are published, such as representations of equatorial stratospheric zonal winds, comparison of mean meridional circulation and mixture processes, comparison of seasonal and interannual variations in dynamical fields etc.

Free Research Field

Middle atmosphere science