DOI: 10.1007/s00382-014-2448-2
Scopus记录号: 2-s2.0-84943816233
论文题名: Understanding the El Niño-like oceanic response in the tropical Pacific to global warming
作者: Luo Y. ; Lu J. ; Liu F. ; Liu W.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2015
卷: 45, 期: 2017-07-08 起始页码: 1945
结束页码: 1964
语种: 英语
英文关键词: El Niño-like response
; Global warming
; Oceanic dynamical thermostat
; Thermocline
英文摘要: The enhanced central and eastern Pacific SST warming and the associated ocean processes under global warming are investigated using the ocean component of the Community Earth System Model (CESM), Parallel Ocean Program version 2 (POP2). The tropical SST warming pattern in the coupled CESM can be faithfully reproduced by the POP2 forced with surface fluxes computed using the aerodynamic bulk formula. By prescribing the wind stress and/or wind speed through the bulk formula, the effects of wind stress change and/or the wind-evaporation-SST (WES) feedback are isolated and their linearity is evaluated in this ocean-alone setting. Result shows that, although the weakening of the equatorial easterlies contributes positively to the El Niño-like SST warming, 80 % of which can be simulated by the POP2 without considering the effects of wind change in both mechanical and thermodynamic fluxes. This result points to the importance of the air–sea thermal interaction and the relative feebleness of the ocean dynamical process in the El Niño-like equatorial Pacific SST response to global warming. On the other hand, the wind stress change is found to play a dominant role in the oceanic response in the tropical Pacific, accounting for most of the changes in the equatorial ocean current system and thermal structures, including the weakening of the surface westward currents, the enhancement of the near-surface stratification and the shoaling of the equatorial thermocline. Interestingly, greenhouse gas warming in the absence of wind stress change and WES feedback also contributes substantially to the changes at the subsurface equatorial Pacific. Further, this warming impact can be largely replicated by an idealized ocean experiment forced by a uniform surface heat flux, whereby, arguably, a purest form of oceanic dynamical thermostat is revealed. © 2014, Springer-Verlag Berlin Heidelberg. 资助项目: NSFC, National Natural Science Foundation of China
; NSFC, National Natural Science Foundation of China
; NSF, National Science Foundation
; NSF, National Science Foundation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54006
Appears in Collections: 过去全球变化的重建
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作者单位: Physical Oceanography Laboratory, Ocean University of China, Qingdao, China; Graduate School of Oceanography, University of Rhode Island, 215 South Ferry Road, Narragansett, RI, United States; Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, WA, United States; Scripps Institution of Oceanography, San Diego, CA, United States
Recommended Citation:
Luo Y.,Lu J.,Liu F.,et al. Understanding the El Niño-like oceanic response in the tropical Pacific to global warming[J]. Climate Dynamics,2015-01-01,45(2017-07-08)