Modulation and dynamics of the Quasi-Biennial Oscillation associated with El Nino/Southern Oscillation

与厄尔尼诺/南方涛动相关的准两年期振荡的调制和动力学

• 批准号: 23740353
• 负责人: TAGUCHI Masakazu
• 金额: $ 1.91万
• 依托单位: Aichi University of Education
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23740353/
• 关键词: 準二年周期振動; 季節同期; エルニーニョ・南方振動; 成層圏突然昇温; 力学的診断; 重力波; 熱帯成層圏変動; 対流圏―成層圏結合

Using atmospheric reanalysis and CMIP5 datasets, this study investigated modulation and dynamics of the Quasi-Biennial Oscillation (QBO) in the equatorial stratosphere. In particular, we found that in the reanalysis data, the QBO modulation associated with the mean seasonal cycle and El Nino/Southern Oscillation (ENSO) is not explained by large-scale fields. It was also found that QBO-like oscillations, simulated in a few CMIP5 models, have notable differences in structure and behavior from the real world. These suggest that small-scale waves (gravity waves) are important in the modulation.We further revealed nonlinear changes in frequency of major stratospheric sudden warmings with QBO and ENSO using a long reanalysis dataset.

利用大气再分析和CMIP5资料，研究了赤道平流层准两年一次振荡（QBO）的调制和动力学。特别是在再分析资料中，我们发现与平均季节周期和厄尔尼诺/南方涛动（ENSO）相关的QBO调制不能用大尺度场来解释。研究还发现，在一些CMIP5模型中模拟的qbo样振荡在结构和行为上与现实世界有显著差异。这表明小尺度波（重力波）在调制中起着重要作用。利用长时间的再分析数据，我们进一步揭示了QBO和ENSO对平流层主要突然变暖频率的非线性变化。

项目成果

ENSOによって誘起される北半球冬季成層圏変化の再検討

重新审视 ENSO 引起的北半球冬季平流层变化

• 作者: Sato;K. and H. Okamoto;田口正和
• 通讯作者: 田口正和

ENSO-induced changes in the Northern winter stratosphere revisited : Results from JRA-25/JCDAS reanalysis and JMA hindcast data

重新审视 ENSO 引起的北方冬季平流层变化：JRA-25/JCDAS 再分析和 JMA 后报数据的结果

• 发表时间: 2013
• 作者: Tangdong Qu;Tomoki Tozuka;Shinichiro Kida;Xinyu Guo;Yasumasa Miyazawa;Qinyu Liu;Masakazu Taguchi
• 通讯作者: Masakazu Taguchi

Diagnosis of Annual Synchronization of the Quasi-Biennial Oscillation: Results from JRA-25/JCDAS Reanalysis and MRI Chemistry-Climate Model Data

准两年期振荡的年度同步诊断：JRA-25/JCDAS 再分析和 MRI 化学-气候模型数据的结果

• DOI: 10.2151/jmsj.2013-301
• 发表时间: 2013
• 期刊: Journal of the Meteorological Society of Japan
• 影响因子: 3.1
• 作者: M. Taguchi;K. Shibata
• 通讯作者: K. Shibata

Diagnosis of annual synchronization of the Quasi-Biennial Oscillation : Results from JRA-25/JCDAS reanalysis and MRI CCM data

准两年一次振荡的年度同步诊断：JRA-25/JCDAS 再分析和 MRI CCM 数据的结果

• 发表时间: 2012
• 作者: Sato;K.;H.;Okamoto;Masakazu Taguchi and Kiyotaka Shibata
• 通讯作者: Masakazu Taguchi and Kiyotaka Shibata