Influence of the Northern Hemisphere annular mode on ENSO

北半球环形模态对 ENSO 的影响

• 批准号: 22654055
• 负责人: TACHIBANA Yoshihiro
• 金额: $ 1.92万
• 依托单位: Mie University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22654055/
• 关键词: 北極振動; エルニーニョ; 北大西洋振動; CMIP3; WP; マルチモデルアンサンブル; 豪雪; ENSO予測; 気候力学; cold surge; AO; ENSO; Dry surge; 西風バースト

The influence of the Northern Hemisphere annular mode(NAM) on the El Nino/Southern Oscillation(ENSO) was examined using 41-year reanalysis data and an atmospheric general circulation model(AGCM). Significant lag correlations between the NAM index for spring and the Nino-3 index for the following winter were revealed. An anomalous lower tropospheric westerly associated with modulation of the westerly wind burst(WWB) over the western tropical Pacific in spring often coincided with the positive phase of the NAM and extended eastward during summer and autumn. Then, warm sea surface temperature(SST) anomalies reflecting El Nino appeared over the eastern tropical Pacific in early winter. In an AGCM experiment in which SSTs were fixed as a climatological-mean monthly distribution, the interannual modulation of WWB was significantly associated with NAM variability in spring, supporting the possible influence of the NAM in spring on an ENSO outbreak the following winter.

利用41年再分析资料和大气环流模式（AGCM）研究了北半球环状模态（NAM）对厄尔尼诺/南方涛动（ENSO）的影响。春季NAM指数与次年冬季Nino-3指数之间存在显著的滞后相关性。对流层低层西风带与热带太平洋西部的西风爆发（WWB）的调制有关，在春季通常与不正运动的正相一致，并在夏季和秋季向东延伸。随后，热带太平洋东部初冬出现反映厄尔尼诺现象的暖海温异常。在AGCM实验中，海温固定为气候-月平均分布，WWB的年际调节与春季的不结盟运动变率显著相关，支持春季不结盟运动对次年冬季ENSO爆发的可能影响。

项目成果

2010年夏の北極振動指数(SV NAM)異常とそれに関連した半球規模の猛暑

2010 年夏季北极涛动指数 (SV NAM) 异常和相关的半球热浪

• 发表时间: 2011
• 作者: She;C.-Y;M. Abo;J. Yue;B. P. Williams;C. Nagasawa;T. Nakamura;楠本聡・ 綿田 辰吾・ 佐 竹健治;立花義裕,大富裕里子,中村哲
• 通讯作者: 立花義裕,大富裕里子,中村哲

A polar low embedded in a blocking high over the Pacific Arctic

极地低压嵌入太平洋北极上空的阻塞高压中

• 发表时间: 2010
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: Inoue;J.;M.E.Hori;Y.Tachibana;T.Kikuchi
• 通讯作者: T.Kikuchi

An Inter-comparison of Observation System Experiments for Stratospheric Ozone between LETKF Data Assimilation Systems with CCSR/NIES CCM

LETKF数据同化系统与CCSR/NIES CCM平流层臭氧观测系统实验对比

• 发表时间: 2011
• 作者: Nakamura;T.;M. Deushi;K. Miyazaki;C. Kobayashi;H. Akiyoshi;K. Shibata;and T. Iwasaki
• 通讯作者: and T. Iwasaki

An Inter-comparison of Observation System Experiments for Stratospheric Ozone between LETKF Data Assimilation Systems with CCSR/NIES CCM, MRI CCM, and CHASER CTM

LETKF数据同化系统与CCSR/NIES CCM、MRI CCM和CHASER CTM平流层臭氧观测系统实验的相互比较

• 发表时间: 2011
• 作者: Nakamura;T.
• 通讯作者: T.

Recurrence of Intraseasonal Cold Air Outbreak during the 2009/2010 Winter in Japan and its Ties to the Atmospheric Condition over the Barents-Kara Sea

• DOI: 10.2151/sola.2011-007
• 发表时间: 2011-02
• 期刊: Sola
• 影响因子: 1.9
• 作者: M. Hori;J. Inoue;T. Kikuchi;M. Honda;Y. Tachibana