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DOI | 10.1007/s00382-017-3981-6 |
An evaluation of ENSO dynamics in CMIP simulations in the framework of the recharge oscillator model | |
Vijayeta, Asha; Dommenget, Dietmar | |
2018-09-01 | |
发表期刊 | CLIMATE DYNAMICS
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ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2018 |
卷号 | 51页码:1753-1771 |
文章类型 | Article |
语种 | 英语 |
国家 | Australia |
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. |
英文关键词 | El Nino southern oscillation ENSO Ocean and atmospheric dynamics ENSO dyanmics El Nino dynamics Coupled general circulation models CGCM Model evaluation Recharge oscillator model Climate feedbacks CMIP simulations |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000442433200010 |
WOS关键词 | EL-NINO ; PACIFIC ; OCEAN ; CIRCULATION ; CLIMATE ; FEEDBACKS ; CYCLE ; ERA |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/36080 |
专题 | 气候变化 |
作者单位 | Monash Univ, Sch Earth Atmosphere & Environm, ARC Ctr Excellence Climate Syst Sci, Melbourne, Vic 3800, Australia |
推荐引用方式 GB/T 7714 | Vijayeta, Asha,Dommenget, Dietmar. An evaluation of ENSO dynamics in CMIP simulations in the framework of the recharge oscillator model[J]. CLIMATE DYNAMICS,2018,51:1753-1771. |
APA | Vijayeta, Asha,&Dommenget, Dietmar.(2018).An evaluation of ENSO dynamics in CMIP simulations in the framework of the recharge oscillator model.CLIMATE DYNAMICS,51,1753-1771. |
MLA | Vijayeta, Asha,et al."An evaluation of ENSO dynamics in CMIP simulations in the framework of the recharge oscillator model".CLIMATE DYNAMICS 51(2018):1753-1771. |
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