DOI: 10.1175/JCLI-D-11-00494.1
Scopus记录号: 2-s2.0-84870013114
论文题名: Mean climate controls on the simulated response of ENSO to increasing greenhouse gases
作者: Dinezio P.N. ; Kirtman B.P. ; Clement A.C. ; Lee S.-K. ; Vecchi G.A. ; Wittenberg A.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 21 起始页码: 7399
结束页码: 7420
语种: 英语
Scopus关键词: Atmospheric CO
; EL Nino
; ENSO
; ENSO events
; Heat budget analysis
; Model experiments
; Multi-model
; Ocean heat flux
; Simulated response
; Southern oscillation
; Subsurface temperature
; Tropical variabilty
; Walker circulation
; Atmospheric pressure
; Carbon dioxide
; Climate change
; Climate models
; Greenhouse gases
; Stream flow
; Thermal stratification
; Heat flux
; carbon dioxide
; climate change
; climate feedback
; climate modeling
; convergence
; El Nino-Southern Oscillation
; experimental study
; greenhouse gas
; heat flux
; stratification
; temperature gradient
; thermocline
; Walker circulation
英文摘要: Climate model experiments are analyzed to elucidate if and how the changes in mean climate in response to doubling of atmospheric CO2 (2xCO2) influence ENSO. The processes involved the development, transition, and decay of simulated ENSO events are quantified through a multimodel heat budget analysis. The simulated changes in ENSO amplitude in response to 2xCO2 are directly related to changes in the anomalous ocean heat flux convergence during the development, transition, and decay of ENSOevents. The weakening of the Walker circulation and the increased thermal stratification, both robust features of the mean climate response to 2xCO2,play opposing roles in ENSO-mean climate interactions. Weaker upwelling inresponse to a weaker Walker circulation drives a reduction in thermocline-driven ocean heat flux convergence (i.e., thermocline feedback) and, thus, reduces the ENSO amplitude. Conversely, a stronger zonal subsurface temperature gradient, associated with the increased thermal stratification, drives an increase in zonal-current-induced ocean heat flux convergence (i.e., zonal advection feedback) and, thus, increases the ENSO amplitude. These opposing processes explain the lackof model agreement in whether ENSO is going to weaken or strengthen in response to increasing greenhouse gases, but alsowhy ENSO appears to be relatively insensitive to 2xCO2 in most models. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52152
Appears in Collections: 气候变化事实与影响
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作者单位: International Pacific Research Center, School of Ocean and Earth Science and Technology, University of Hawaii at Manoa, Honolulu, HI, United States; Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL, United States; Cooperative Institute for Marine and Atmospheric Studies, University of Miami, NOAA/Atlantic Oceanographic and Meteorological Laboratory, Miami, FL, United States; NOAA/Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States
Recommended Citation:
Dinezio P.N.,Kirtman B.P.,Clement A.C.,et al. Mean climate controls on the simulated response of ENSO to increasing greenhouse gases[J]. Journal of Climate,2012-01-01,25(21)