DOI: 10.1175/JCLI-D-16-0880.1
Scopus记录号: 2-s2.0-85040606117
论文题名: Observations and mechanisms of a simple stochastic dynamical model capturing El Niño diversity
作者: Chen N. ; Majda A.J. ; Thual S.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 1 起始页码: 449
结束页码: 471
语种: 英语
英文关键词: Atmosphere-ocean interaction
; Coupled models
; ENSO
; Parameterization
; Statistics
; Stochastic models
Scopus关键词: Advection
; Atmospheric pressure
; Atmospheric thermodynamics
; Climatology
; Coastal zones
; Enthalpy
; Mechanical waves
; Nickel
; Nickel compounds
; Ocean currents
; Oceanography
; Parameterization
; Statistics
; Stochastic systems
; Surface waters
; Wind stress
; Atmosphere-ocean interactions
; Coupled models
; ENSO
; Non-Gaussian statistics
; Ocean-atmosphere models
; Sea surface temperature (SST)
; Southern oscillation
; Westerly wind bursts
; Stochastic models
; air-sea interaction
; atmosphere-ocean coupling
; El Nino
; El Nino-Southern Oscillation
; Kelvin wave
; parameterization
; Rossby wave
; sea surface temperature
; stochasticity
; Pacific Ocean
; Pacific Ocean (Central)
英文摘要: El Niño-Southern Oscillation (ENSO) has significant impact on global climate and relevance for seasonal forecasts. Recently, a simple modeling framework was developed that captures the ENSO diversity, where state-dependent stochastic wind bursts and nonlinear advection of sea surface temperature are coupled to a simple ocean-atmosphere model that is otherwise deterministic, linear, and stable. In this article, the coupled model is compared with observations using reanalysis data over the last 34 yr, where the observed non-Gaussian statistics and the overall mechanisms of ENSO are both captured by the model. Then the formation mechanisms of both the central Pacific (CP) and the traditional El Niño in the model are systematically studied. First, ocean Rossby waves induced by easterly trade wind anomalies facilitate the heat content buildup. Then the reflected ocean Kelvin waves and the nonlinear advection lead to positive SST anomalies in the CP region and create a CP El Niño. Second, two formation mechanisms are revealed for the traditional El Niño, including the super (extreme) El Niño. The first mechanism indicates a preferred wind structure with easterly wind bursts (EWBs) leading westerly wind bursts (WWBs), where the EWBs build up heat content and then the WWBs trigger the El Niño. The second mechanism links the two types of El Niño, where a CP El Niño favors a heat content buildup and the advent of a traditional El Niño. This article also highlights the mechanisms of La Niña formation and El Niño termination. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111746
Appears in Collections: 气候减缓与适应
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作者单位: Department of Mathematics, Courant Institute of Mathematical Sciences, New York University, New York, NY, United States; Center for Atmosphere Ocean Science, Courant Institute of Mathematical Sciences, New York University, New York, NY, United States; Center for Prototype Climate Modeling, New York University Abu Dhabi, Abu Dhabi, United Arab Emirates
Recommended Citation:
Chen N.,Majda A.J.,Thual S.. Observations and mechanisms of a simple stochastic dynamical model capturing El Niño diversity[J]. Journal of Climate,2018-01-01,31(1)