DOI: 10.1175/JCLI-D-14-00812.1
Scopus记录号: 2-s2.0-84950148640
论文题名: Reassessing conceptual models of ENSO
作者: Graham F.S. ; Brown J.N. ; Wittenberg A.T. ; Holbrook N.J.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 23 起始页码: 9121
结束页码: 9142
语种: 英语
Scopus关键词: Atmospheric pressure
; Atmospheric temperature
; Climate models
; Differential equations
; Earth (planet)
; Feedback
; Oceanography
; Oscillators (mechanical)
; Surface waters
; Wind stress
; Conceptual frameworks
; Delay differential equations
; EL Nino
; ENSO
; Interannual time scale
; Ocean model
; Sea surface temperature (SST)
; Self-sustained oscillations
; Climatology
; atmospheric circulation
; atmospheric dynamics
; climate feedback
; conceptual framework
; El Nino
; El Nino-Southern Oscillation
; modeling
; sea surface temperature
; temperature anomaly
; thermocline
; wind stress
英文摘要: The complex nature of the El Niño-Southern Oscillation (ENSO) is often simplified through the use of conceptual models, each of which offers a different perspective on the ocean-atmosphere feedbacks underpinning the ENSO cycle. One theory, the unified oscillator, combines a variety of conceptual frameworks in the form of a coupled system of delay differential equations. The system produces a self-sustained oscillation on interannual time scales. While the unified oscillator is assumed to provide a more complete conceptual framework of ENSO behaviors than the models it incorporates, its formulation and performance have not been systematically assessed. This paper investigates the accuracy of the unified oscillator through its ability to replicate the ENSO cycle modeled by flux-forced output from the Australian Community Climate and Earth-System Simulator Ocean Model (ACCESS-OM). The anomalous sea surface temperature equation reproduces the main features of the corresponding tendency modeled by ACCESS-OM reasonably well. However, the remaining equations for the thermocline depth anomaly and zonal wind stress anomalies are unable to accurately replicate the corresponding tendencies in ACCESS-OM. Modifications to the unified oscillator, including a diagnostic form of the zonal wind stress anomaly equations, improve its ability to emulate simulated ENSO tendencies. Despite these improvements, the unified oscillator model is less adept than the delayed oscillator model it incorporates in capturing ENSO behavior in ACCESS-OM, bringing into question its usefulness as a unifying ENSO framework. © 2015 American Meteorological Society. 资助项目: CSIRO, Commonwealth Scientific and Industrial Research Organisation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50736
Appears in Collections: 气候变化事实与影响
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作者单位: Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, TAS, Australia; Oceans and Atmosphere, CSIRO, Hobart, TAS, Australia; National Oceanic and Atmospheric Administration, Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States; Centre of Excellence for Climate System Science, Australian Research Council, Hobart, TAS, Australia
Recommended Citation:
Graham F.S.,Brown J.N.,Wittenberg A.T.,et al. Reassessing conceptual models of ENSO[J]. Journal of Climate,2015-01-01,28(23)