DOI: 10.1002/2015GL063701
论文题名: On the dynamical mechanisms explaining the western Pacific subsurface temperature buildup leading to ENSO events
作者: Ballester J. ; Bordoni S. ; Petrova D. ; Rodõ X.
刊名: Geophysical Research Letters
ISSN: 0094-8760
EISSN: 1944-8491
出版年: 2015
卷: 42, 期: 8 起始页码: 2961
结束页码: 2967
语种: 英语
英文关键词: assimilation data
; Ekman transport
; El Niño
; ENSO
; La Niña
; Sverdrup transport
Scopus关键词: Atmospheric pressure
; Nickel
; Assimilation data
; Dynamical mechanisms
; Dynamical transition
; Ekman transport
; ENSO
; Equatorial undercurrents
; Subsurface temperature
; Sverdrup transport
; Climatology
; downwelling
; El Nino-Southern Oscillation
; heat flux
; mass transport
; subsurface flow
; thermocline
; undercurrent
; Pacific Ocean
; Pacific Ocean (West)
英文摘要: Despite steady progress in the understanding of El Niño-Southern Oscillation (ENSO) in the past decades, questions remain on the exact mechanisms explaining the heat buildup leading to the onset of El Niño (EN) events. Here we use an ensemble of ocean and atmosphere assimilation products to identify mechanisms that are consistently identified by all the data sets and that contribute to the heat buildup in the western Pacific 18 to 24 months before the onset of EN events. Meridional and eastward heat advection due to equatorward subsurface mass convergence and transport along the equatorial undercurrent are found to contribute to the subsurface warming at 170°E-150°W. In the warm pool, instead, surface horizontal convergence and downwelling motion have a leading role in subsurface warming. The picture emerging from our results highlights a sharp dynamical transition at 170°E near the level of the thermocline. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84929516290&doi=10.1002%2f2015GL063701&partnerID=40&md5=bad0b8093c206558ca9259415fa47d0f
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8376
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Environmental Science and Engineering, California Institute of Technology, Pasadena, CA, United States
Recommended Citation:
Ballester J.,Bordoni S.,Petrova D.,et al. On the dynamical mechanisms explaining the western Pacific subsurface temperature buildup leading to ENSO events[J]. Geophysical Research Letters,2015-01-01,42(8).