| DOI: | 10.1175/JCLI-D-11-00609.1
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| Scopus记录号: | 2-s2.0-84871819746
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| 论文题名: | Multiplicative MJO forcing of ENSO |
| 作者: | Kapur A.; Zhang C.
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| 刊名: | Journal of Climate
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| ISSN: | 8948755
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| 出版年: | 2012
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| 卷: | 25, 期:23 | | 起始页码: | 8132
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| 结束页码: | 8147
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| 语种: | 英语
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| Scopus关键词: | Basic parameters
; Coupled models
; ENSO
; Evolving models
; Inter-decadal variability
; Interannual variability
; Intermediate complexity
; Madden-Julian oscillation
; Ocean-atmosphere models
; Parameterized
; Propagation speed
; Sea surface temperature (SST)
; Stochasticity
; Zonal propagation
; Atmospheric pressure
; Atmospheric temperature
; Feedback
; Nickel compounds
; Stochastic models
; Parameterization
; annual variation
; El Nino-Southern Oscillation
; ensemble forecasting
; Madden-Julian oscillation
; parameterization
; sea surface temperature
; stochasticity
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| 英文摘要: | The Madden-Julian oscillation (MJO) is parameterized to study the role of the feedback it receives from sea surface temperature (SST) in its influence on El Nin~ o-Southern Oscillation (ENSO). The parameterization describes MJO surface westerlies in terms of a few basic parameters that include amplitude, zonal propagation extent, propagation speed, and the interval between adjacent events. It is used to drive a coupled ocean-atmosphere model of intermediate complexity tuned to a marginally stable regime. The MJO parameters acquire values either additively (i.e., based on observed estimates of most probable value and stochasticity) or multiplicatively (i.e., modulated by an evolving model ENSO SST, albeit with some stochasticity). Simulations reveal that ENSO variance increases with the stochasticity of MJO amplitude but is insensitive to the stochasticity of zonal extent and speed, except that ENSO vanishes completely when the propagation speed is zero. Likewise, ENSO strengthens linearly with the SST modulation of MJO amplitude, but not of speed and zonal extent-even though the two are known to be significantly influenced by SST. Ensemble comparisons between simulations with and without SST feedback demonstrate that SST feedback to the MJO acting in a stable regime can be responsible for the observed ENSO variance. The multiplicative case has a larger ensemble spread than the additive case, which manifests in a larger interdecadal variability of ENSO. The results emphasize that ENSO reproduction in coupled models depends on correctly representing the MJO, especially its amplitude and SST feedback. © 2012 American Meteorological Society. |
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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/52126
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| Appears in Collections: | 气候变化事实与影响
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作者单位: | Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL, United States
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| Recommended Citation: | |
Kapur A.,Zhang C.. Multiplicative MJO forcing of ENSO[J]. Journal of Climate,2012-01-01,25(23)
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