DOI: 10.1175/JCLI-D-16-0291.1
Scopus记录号: 2-s2.0-85027277983
论文题名: Thermocline fluctuations in the equatorial pacific related to the two types of El Niño events
作者: Xu K. ; Huang R.X. ; Wang W. ; Zhu C. ; Lu R.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 17 起始页码: 6611
结束页码: 6627
语种: 英语
Scopus关键词: Nickel
; Temperature distribution
; Air sea interactions
; Development stages
; Eastward propagation
; EL Nino
; Equatorial Pacific
; Inherent characteristics
; Interannual fluctuations
; Interannual time scale
; Stream flow
英文摘要: The interannual fluctuations of the equatorial thermocline are usually associated with El Niño activity, but the linkage between the thermocline modes and El Niño is still under debate. In the present study, a mode function decomposition method is applied to the equatorial Pacific thermocline, and the results show that the first two dominant modes (M1 and M2) identify two distinct characteristics of the equatorial Pacific thermocline. The M1 reflects a basinwide zonally tilted thermocline related to the eastern Pacific (EP) El Niño, with shoaling (deepening) in the western (eastern) equatorial Pacific. The M2 represents the central Pacific (CP) El Niño, characterized by a V-shaped equatorial Pacific thermocline (i.e., deep in the central equatorial Pacific and shallow on both the western and eastern boundaries). Furthermore, both modes are stable and significant on the interannual time scale, and manifest as the major feature of the thermocline fluctuations associated with the two types of El Niño events. As good proxies of EP and CP El Niño events, thermocline-based indices clearly reveal the inherent characteristics of subsurface ocean responses during the evolution of El Niño events, which are characterized by the remarkable zonal eastward propagation of equatorial subsurface ocean temperature anomalies, particularly during the CP El Niño. Further analysis of the mixed layer heat budget suggests that the air-sea interactions determine the establishment and development stages of the CP El Niño, while the thermocline feedback is vital for its further development. These results highlight the key influence of equatorial Pacific thermocline fluctuations in conjunction with the air-sea interactions, on the CP El Niño. © 2017 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49889
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Science, Guangzhou, China; State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Woods Hole Oceanographic Institute, Woods Hole, MA, United States; Laboratory for Regional Oceanography and Numerical Modeling, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; Institute of Climate System, Chinese Academy of Meteorological Sciences, Beijing, China
Recommended Citation:
Xu K.,Huang R.X.,Wang W.,et al. Thermocline fluctuations in the equatorial pacific related to the two types of El Niño events[J]. Journal of Climate,2017-01-01,30(17)