Quasi‐biennial oscillation impacts on Madden–Julian oscillation‐associated tropical–extratropical interactions and Kelvin waves
Quasi‐biennial oscillation impacts on Madden–Julian oscillation‐associated tropical–extratropical interactions and Kelvin waves
复制标题
准两年期振荡对马登-朱利安振荡的影响-相关热带-温带相互作用和开尔文波
DOI：
10.1002/qj.4238
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发表时间：
2022
影响因子：
8.9
通讯作者：
Roundy, Paul E.
中科院分区：
文献类型：
--
作者：
Roundy, Paul E.
最近的一些工作表明，在准两年振荡(QBO)的平流层风的东相期间，Madden-Julian振荡(MJO)表现出更多的热带对流和风的变化。其中一些工作表明，西风QBO期间的方差减少与较少的重复周期事件有关。本文应用调制线性回归算法，对经时间平滑后的50 百帕10 ·−1东风或西风时12-2月全球大气环流结构的变化进行了评估。结果表明，两种状态之间的热带外对流层上层Rossby波响应有显著差异，而东向波总能量所占比例较小，与西风QBO期间从西进入印度盆地的Kelvin波一致。相反，西风QBO似乎有利于在西半球和欧亚大陆向赤道方向移动的更强的温带波前兆。结果表明，西风QBO期间对温带波动的更多依赖可能会降低MJO在西风QBO期间形成序列序列的可靠性。
Several recent works have demonstrated that the Madden–Julian oscillation (MJO) shows more variance in tropical convection and wind during the easterly phase of stratospheric wind in the quasi‐biennial oscillation (QBO). Some of these works have shown that reduced variance during the westerly QBO is associated with fewer repeating cycles of events. This article applies a modulation linear regression algorithm to assess changes in the global atmospheric circulation structure for December–February MJO signals tested when time‐smoothed 50 hPa winds are easterly or westerly at 10 m·s−1. Results show pronounced differences in the associated extratropical upper tropospheric Rossby wave response between the two QBO states, along with a comparatively lower fraction of total eastward wave energy being consistent with Kelvin waves approaching the Indian basin from the west during the westerly QBO. Instead, westerly QBO appears to favour stronger equatorward‐moving extratropical wave precursors across the Western Hemisphere and Eurasia. The results suggest the hypothesis that more dependence on extratropical waves during the westerly QBO may reduce the reliability of the MJO to form sequential trains during the westerly QBO.
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影响因子：
42.1
作者：
Z. Martin;S. Son;A. Butler;H. Hendon;Hyemi Kim;A. Sobel;S. Yoden;Chidong Zhang
通讯作者：
Z. Martin;S. Son;A. Butler;H. Hendon;Hyemi Kim;A. Sobel;S. Yoden;Chidong Zhang
影响因子：
8.9
作者：
K. Macritchie;P. Roundy
通讯作者：
K. Macritchie;P. Roundy
马登朱利安振荡的全球遥相关特征及其准两年振荡的调制
DOI：
10.1029/2020jd032653
发表时间：
2020
期刊：
Journal of Geophysical Research: Atmospheres
影响因子：
--
作者：
B. Toms;E. Barnes;E. Maloney;S. C. Heever
通讯作者：
S. C. Heever
ENSO 中建立的非线性动力学
DOI：
--
发表时间：
1993
期刊：
影响因子：
--
作者：
J. Elsner;A. Tsonis
通讯作者：
A. Tsonis
季节变化回归斜率系数的诊断及其在 MJO 中的应用
DOI：
--
发表时间：
2017
期刊：
影响因子：
--
作者：
P. Roundy
通讯作者：
P. Roundy