Changes of atmospheric gravity waves, equatorial quasi-biennial oscillation and semiannual oscillation associated with global warming climate

与全球变暖气候相关的大气重力波、赤道准两年振荡和半年振荡的变化

• 批准号: 23740363
• 负责人: KAWATANI Yoshio
• 金额: $ 2.66万
• 依托单位: Japan Agency for Marine-Earth Science and Technology
• 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 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23740363/
• 关键词: 地球温暖化; 赤道準2年振動; 半年振動; 重力波; 国際情報交換; 国際情報交流

The effects of sea surface temperature (SST) and carbon dioxide (CO2) on future changes in the quasi-biennial oscillation (QBO) are investigated using a climate model. Idealized model experiment using the future SST with the present CO2 and the present SST with the future CO2 are conducted. We found that increasing SST mainly plays roles in decreasing the amplitude of the QBO in the lower stratosphere.Next, we analyzed near-equatorial radiosonde observations for 1953-2012 and reveal a long-term trend of weakening amplitude in the zonal wind QBO in the tropical lower stratosphere. The trend is particularly notable at 70 hPa, where the QBO amplitudes dropped by roughly 30% over the period. This trend is also apparent in the global warming simulations of the four models in the Coupled Model Intercomparison Project Phase 5 (CMIP5) that realistically simulate the QBO.

利用气候模式研究了海表面温度(SST)和二氧化碳(CO2)对未来准两年振荡(QBO)变化的影响。利用未来海温和未来海温进行了理想化模式试验。分析了1953-2012年近赤道探空观测资料，揭示了热带低平流层纬向风QBO振幅减弱的长期趋势。这一趋势在70百帕尤为明显，QBO的幅度在此期间下降了约30%。这一趋势在耦合模式比较项目第五阶段(CMIP5)的四个模式的全球变暖模拟中也很明显，这些模式真实地模拟了QBO。

项目成果

成層圏に地球温暖化シグナルを発見！

平流层发现全球变暖信号！

• 发表时间: 2014
• 期刊: パリティ
• 作者: Mochizuki;T.;河谷芳雄
• 通讯作者: 河谷芳雄

赤道準2年振動の将来変化に対する二酸化炭素濃度と海面水温の役割

二氧化碳浓度和海面温度对赤道亚两年期振荡未来变化的作用

• 发表时间: 2011
• 作者: Tsutsumi;A.;河村善也・河村愛・中川良平;日比谷紀之;蜷川清隆・西戸裕嗣・河野重範・野村律夫;河谷芳雄・Kelvin Hamilton・野田彰
• 通讯作者: 河谷芳雄・Kelvin Hamilton・野田彰

A remarkable correlation between short period gravity waves and semiannual oscillation of the zonal wind in the equatorial mesopause region

• DOI: 10.5194/angeo-30-703-2012
• 发表时间: 2012-04
• 期刊: Annales Geophysicae
• 影响因子: 1.9
• 作者: N. Rao;T. Tsuda;Y. Kawatani

Gravity wave characteristics in the Southern Hemisphere revealed by a high-resolution middle-atmosphere general circulation model

高分辨率中层大气环流模型揭示南半球重力波特征

• DOI: 10.1175/jas-d-11-0101.1
• 发表时间: 2012
• 期刊: J. Atmos. Sci.
• 作者: Sato K.;S. Tateno S. Watanabe;and Y. Kawatani
• 通讯作者: and Y. Kawatani

Weakening stratospheric quasibiennial oscillation and trends in tropical mean upwelling

平流层准两年一次振荡减弱和热带平均上升流趋势

• 发表时间: 2014
• 作者: Okamoto Hajime;Sato Kaori;萩原 雄一朗;Takuya Matsumoto;Anatoli Borovoi;河谷芳雄
• 通讯作者: 河谷芳雄