DOI: 10.1175/JCLI-D-12-00347.1
Scopus记录号: 2-s2.0-84878134732
论文题名: On the bias in simulated ENSO SSTA meridional widths of CMIP3 models
作者: Zhang W. ; Jin F.-F. ; Zhao J.-X. ; Li J.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 10 起始页码: 3173
结束页码: 3186
语种: 英语
Scopus关键词: Climatological currents
; Conceptual model
; Control simulation
; Coupled climate model
; Coupled Model Intercomparison Project
; Heat budget analysis
; Sea surface temperature anomalies
; Thermal damping
; Atmospheric pressure
; Atmospheric temperature
; Climate models
; Damping
; Ocean currents
; Computer simulation
; advection
; climate modeling
; climatology
; El Nino-Southern Oscillation
; heat budget
; oceanic current
; sea surface temperature
; temperature anomaly
; trade wind
英文摘要: The fidelity of coupled climate models simulating El Niño-Southern Oscillation (ENSO) patterns has been widely examined. Nevertheless, a systematical narrow bias in the simulated meridional width of the sea surface temperature anomaly (SSTA) of ENSO has been largely overlooked. Utilizing the preindustrial control simulations of 11 coupled climate models from phase 3 of the Coupled Model Intercomparison Project (CMIP3), it was shown that the simulated width of the ENSO SSTA is only about two-thirds of what is observed. Through a heat budget analysis based on simulations and ocean reanalysis datasets, it is demonstrated that the SSTAoutside of the equatorial strip is predominantly controlled by the anomalous meridional advection by climatological currents and heat-flux damping. The authors thus propose a simple damped-advective conceptual model to describe ENSO width. The simple model indicates that this width is primarily determined by three factors: meridional current,ENSOperiod, and thermal damping rate. When themeridional current is weak, it spreads the equatorial SSTA away from the equator less effectively and the ENSO width thus tends to be narrow. A short ENSO period allows less time to transport the equatorial SSTA toward the off-equatorial region, and strong damping prevents expansion of the SSTA away from the equator, both of which lead to the meridional width becoming narrow. The narrow bias of the simulated ENSO width is mainly due to a systematical bias in weak trade winds that lead to weak ocean meridional currents, and partly due to a bias toward short ENSO periods. © 2013 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51915
Appears in Collections: 气候变化事实与影响
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作者单位: Key Laboratory of Meteorological Disaster, Ministry of Education, College of Atmospheric Sciences, Nanjing University of Information Science and Technology, Nanjing, China; School of Ocean and Earth Science and Technology, University of Hawaii at Manoa, Honolulu, HI, United States; Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Chinese Academy of Sciences, Institute of Atmospheric Physics, Beijing, China
Recommended Citation:
Zhang W.,Jin F.-F.,Zhao J.-X.,et al. On the bias in simulated ENSO SSTA meridional widths of CMIP3 models[J]. Journal of Climate,2013-01-01,26(10)