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DOI	10.1175/JCLI-D-20-0551.1
	Origins of the excessive westward extension of ENSO SST simulated in CMIP5 and CMIP6 models
	Jiang W.; Huang P.; Huang G.; Ying J.
发表日期	2021
ISSN	08948755
起始页码	2839
结束页码	2851
卷号	34 期号:8
英文摘要	An excessive westward extension of the simulated ENSO-related sea surface temperature (ENSO SST) variability in the CMIP5 and CMIP6 models is the most apparent ENSO SST pattern bias and dominates the intermodel spread in ENSO SST variability among the models. The ENSO SST bias lowers the models' skill in ENSO-related simulations and induces large intermodel uncertainty in ENSO-related projections. The present study investigates the origins of the excessive westward extension of ENSO SST in 25 CMIP5 and 25 CMIP6 models. Based on the intermodel spread of ENSO SST variability simulated in the 50 models, we reveal that this ENSO SST bias among the models largely depends on the simulated cold tongue strength in the equatorial western Pacific (EWP). Models simulating a stronger cold tongue tend to simulate a larger mean zonal SST gradient in the EWP and then a larger zonal advection feedback in the EWP, favoring a more westward extension of the ENSO SST pattern. In addition, with the overall improvement in the EWP cold tongue from CMIP5 to CMIP6, the excessive westward extension bias of ENSO SST in CMIP6 models is also reduced relative to those in CMIP5 models. The results suggest that the bias and intermodel disagreement in the mean-state SST have been improved, which improves ENSO simulation. © 2021 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).
英文关键词	ENSO; Model comparison; Model errors; Model evaluation/performance
语种	英语
scopus关键词	Climate models; Surface waters; Sea surface temperature (SST); Western Pacific; Oceanography; advection; climate modeling; CMIP; El Nino-Southern Oscillation; error analysis; performance assessment; sea surface temperature; temperature gradient; Pacific Ocean; Pacific Ocean (West)
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178657
作者单位	Key Laboratory of Marine Hazards Forecasting, Ministry of Natural Resources, College of Oceanography, Hohai University, Nanjing, China; State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; University of Chinese Academy of Sciences, Beijing, China; State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China
推荐引用方式 GB/T 7714	Jiang W.,Huang P.,Huang G.,et al. Origins of the excessive westward extension of ENSO SST simulated in CMIP5 and CMIP6 models[J],2021,34(8).
APA	Jiang W.,Huang P.,Huang G.,&Ying J..(2021).Origins of the excessive westward extension of ENSO SST simulated in CMIP5 and CMIP6 models.Journal of Climate,34(8).
MLA	Jiang W.,et al."Origins of the excessive westward extension of ENSO SST simulated in CMIP5 and CMIP6 models".Journal of Climate 34.8(2021).