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DOI | 10.1029/2020GL087274 |
Normal mode perspective on the 2016 QBO disruption: evidence for a basic state regime transition | |
B. Raphaldini; A. S. W. Teruya; P. L. Silva Dias; V. R. C. Mayta; V. J. Takara | |
2020-07-08 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2020 |
英文摘要 | A normal mode decomposition of the dynamical structure of the Quasi‐biennial Oscillation (QBO) is presented in this article. It was found that the QBO is predominantly described by Rossby modes as well as westward inertio‐gravity modes with a low meridional mode index. We show that the 2016 QBO disruption was accompanied by an extreme amplitude event of an asymmetric zonal Rossby mode (with meridional index 4) consisting of the largest amplitude in 40 years. This component of the zonal flow favors the convergence of eastward momentum in the equatorial region, controlling the perturbations to the QBO. The zonal winds associated with this mode are extremely intermittent with heavy tail distributions. Our statistical analysis indicates a regime transition in this zonal mode in the recent decades, favoring stronger perturbations to the QBO. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/283276 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | B. Raphaldini,A. S. W. Teruya,P. L. Silva Dias,et al. Normal mode perspective on the 2016 QBO disruption: evidence for a basic state regime transition[J]. Geophysical Research Letters,2020. |
APA | B. Raphaldini,A. S. W. Teruya,P. L. Silva Dias,V. R. C. Mayta,&V. J. Takara.(2020).Normal mode perspective on the 2016 QBO disruption: evidence for a basic state regime transition.Geophysical Research Letters. |
MLA | B. Raphaldini,et al."Normal mode perspective on the 2016 QBO disruption: evidence for a basic state regime transition".Geophysical Research Letters (2020). |
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