DOI: 10.1007/s00382-017-3981-6
Scopus记录号: 2-s2.0-85034232656
论文题名: An evaluation of ENSO dynamics in CMIP simulations in the framework of the recharge oscillator model
作者: Vijayeta A. ; Dommenget D.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 51, 期: 2018-05-06 起始页码: 1753
结束页码: 1771
语种: 英语
英文关键词: CGCM
; Climate feedbacks
; CMIP simulations
; Coupled general circulation models
; El Nino dynamics
; El Nino southern oscillation
; ENSO
; ENSO dyanmics
; Model evaluation
; Ocean and atmospheric dynamics
; Recharge oscillator model
Scopus关键词: atmospheric general circulation model
; atmospheric modeling
; CMIP
; computer simulation
; El Nino
; El Nino-Southern Oscillation
; heat flux
; wind stress
英文摘要: The CMIP model simulations show wide spread uncertainties in ENSO statistics and dynamics. In this study, we use the concept of the linear recharge oscillator (ReOsc) model to diagnose the ENSO-dynamics in CMIP3 and CMIP5 model simulations. The ReOsc model parameters allow us to quantify SST and thermocline damping, SST coupling to thermocline and vice-versa, sensitivity to wind stress and heat flux forcings and separate atmospheric from oceanic processes. Our results show that the ENSO-dynamics and their diversity within the CMIP ensemble can be well represented with the linear recharge oscillator model diagnostics. We also illustrate that the ENSO dynamics show larger biases relative to observations and spread within the models than simple large-scale statistics such as SST standard deviation would suggest. The CMIP models underestimate the atmospheric positive and negative feedbacks, they have compensating atmospheric and oceanic errors, the thermocline damping is too strong and stochastic noise forcings in models is too weak. The CMIP5 models show only marginal improvements relative to CMIP3. The results suggest that models can still be significantly improved and our analysis gives directions to what needs to be improved. © 2017, Springer-Verlag GmbH Germany. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109126
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: School of Earth, Atmosphere and Environment, ARC Centre of Excellence for Climate System Science, Monash University, Melbourne, VIC 3800, Australia
Recommended Citation:
Vijayeta A.,Dommenget D.. An evaluation of ENSO dynamics in CMIP simulations in the framework of the recharge oscillator model[J]. Climate Dynamics,2018-01-01,51(2018-05-06)