| DOI: | 10.1007/s00382-015-2916-3
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| Scopus记录号: | 2-s2.0-84948147393
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| 论文题名: | Dynamical theory driven observational analysis of ENSO modes in the equatorial Pacific |
| 作者: | Weare B.C.
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| 刊名: | Climate Dynamics
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| ISSN: | 9307575
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| 出版年: | 2016
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| 卷: | 47, 期:2017-05-06 | | 起始页码: | 1515
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| 结束页码: | 1526
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| 语种: | 英语
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| 英文关键词: | ENSO
; Maximum covariance analysis
; Ocean dynamics
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| 英文摘要: | The dynamics of tropical Pacific sea surface height changes associated with El Niño/Southern Oscillation (ENSO) have been explored using a melding of a simple dynamical model and maximum covariance analysis (MCA). Two dominant MCA modes, which are degenerate and well correlated at a lag of about 4 months, have a combined time series which is strongly correlated with the Niño3.4 ENSO index. The leading Equatorial Mode shows a strong equatorial signature and is associated with Kelvin wave forcing, Ekman pumping, the wind stress curl, and the Recharge Oscillator hypothesis. The lagging East/West Mode shows a less equatorially trapped east/west pattern of variation and is most associated with zonal wind stress and the Delayed Oscillator hypothesis. The net effect of internal equatorial Rossby waves is dissipative and is not confined to the western boundary. The relevant zonal stress and stress curl fields stretch across the basin. Additional analyses show that both the zonal wind stress and the wind stress curl terms are required for the development of classic ENSO events. Removal of either term gives rise to weaker events, which have properties similar to the central Pacific ENSO events. The seasonal phase-locking of ENSO events is shown to be related to a north to south excursion of wind stress anomalies. © 2015, Springer-Verlag Berlin Heidelberg. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/53558
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| Appears in Collections: | 过去全球变化的重建
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作者单位: | Atmospheric Science Program, Land, Air and Water Resources, University of California, Davis, CA, United States
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| Recommended Citation: | |
Weare B.C.. Dynamical theory driven observational analysis of ENSO modes in the equatorial Pacific[J]. Climate Dynamics,2016-01-01,47(2017-05-06)
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