DOI: 10.1002/joc.5476
论文题名: Different evolution features for two types of El Niño and possible causes for these differences
作者: Li H. ; Xu H. ; Li Z. ; Deng J.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2018
卷: 38, 期: 7 起始页码: 2967
结束页码: 2979
语种: 英语
英文关键词: central Pacific El Niño
; eastern Pacific El Niño
; ENSO transition
; Indian Ocean basin-wide mode
; Indian Ocean dipole
Scopus关键词: Decay (organic)
; Heat flux
; Lanthanum
; Nickel compounds
; Ocean currents
; Surface waters
; Temperature
; Eastern equatorial Pacific
; Eastern pacific
; ENSO transition
; Indian ocean
; Indian Ocean dipole
; Indian ocean dipoles
; Sea surface temperature anomalies
; Thermodynamic process
; Phase transitions
; El Nino-Southern Oscillation
; heat budget
; heat flux
; Indian Ocean Dipole
; La Nina
; mixed layer
; sea surface temperature
; temperature anomaly
; thermodynamics
; Indian Ocean
; Pacific Ocean
; Pacific Ocean (Central)
; Pacific Ocean (East)
; Pacific Ocean (Equatorial)
英文摘要: Observed sea surface temperature (SST) anomalies in the central eastern equatorial Pacific exhibit two kinds of phase evolution, that is, transition and no-transition, for both the eastern Pacific (EP) and central Pacific (CP) El Niño events. The transition type of El Niño is characterized by a strong decay after its peak and followed by a rapid transition to a La Niña event in the subsequent winter, while the no-transition type of both EP and CP El Niño is featured by a weaker decay after its mature phase and fails to develop a La Niña event in the decaying year. For the EP El Niño, the intensity of the anomalous easterly over the western equatorial Pacific in the transition type is stronger than that in the no-transition type, which is likely determined by the coupling of the Indian Ocean dipole (IOD) during the developing phase and the Indian Ocean basin-wide mode (IOBM) during the decaying phase. For the CP El Niño, larger differences of easterly wind anomalies between the transition type and no-transition type are found over the central eastern equatorial Pacific during the decaying year, which is also likely related to the IOD and IOBM coupling process. In addition, the rapid decay of warm subsurface (80–160 m) temperature anomalies in the central eastern equatorial Pacific during the decaying phases is crucial for the phase transition for the two types of El Niño, together with the eastwards propagation of cold subsurface (100–200 m) temperature anomalies in the western equatorial Pacific. What is more, analyses of the mixed-layer heat budget show that the phase evolution of the EP El Niño depends on dynamic forcing (zonal advection) due to the difference of anomalous mixed-layer ocean currents, while the CP El Niño’s different phase evolution is mainly caused by thermodynamic process, that is, net surface heat flux anomalies. © 2018 Royal Meteorological Society Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116887
Appears in Collections: 气候减缓与适应
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作者单位: Key Laboratory of Meteorological Disaster/KLME/ILCEC/CIC-FEMD, Nanjing University of Information Science & Technology, Nanjing, China; National Demonstration Center for Experimental Atmospheric Science & Environmental Meteorology Education, Nanjing University of Information Science & Technology, Nanjing, China
Recommended Citation:
Li H.,Xu H.,Li Z.,et al. Different evolution features for two types of El Niño and possible causes for these differences[J]. International Journal of Climatology,2018-01-01,38(7)