DOI: 10.1007/s00382-015-2842-4
Scopus记录号: 2-s2.0-84944529853
论文题名: Seasonal-to-interannual variability of the barrier layer in the western Pacific warm pool associated with ENSO
作者: Wang X. ; Liu H.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2016
卷: 47, 期: 2017-01-02 起始页码: 375
结束页码: 392
语种: 英语
英文关键词: Barrier layer
; Central Pacific El Niño
; East Pacific El Niño
; El Niño/Southern Oscillation
; Pacific warm pool
; Sea surface salinity
英文摘要: This study investigates the seasonal-to-interannual variability of the barrier layer (BL) associated with El Niño/Southern Oscillation (ENSO) using in situ temperature-salinity observations and simple ocean assimilation data (SODA). The comparisons with the BL derived from the in situ observations show that SODA successfully captures the variability of the BL in the Pacific warm pool. On seasonal timescale, based on the empirical orthogonal function (EOF) analysis, we identify that three seasonal leading modes of the BL along the equatorial Pacific are closely associated with the transition, resurgence and onset of ENSO, respectively. We also confirm that two interannual leading modes of the BL are related to different flavors of ENSO events. EOF1 mainly embodies a combined response to the central and east Pacific ENSO events while EOF2 is related to the central Pacific ENSO events. We especially focus on the contrast of the BL between east Pacific El Niño (EPEN) and central Pacific El Niño (CPEN). During EPEN, the abnormally thick BL appears in the east of the dateline. It follows the sea surface salinity front to shift zonally with the evolution of EPEN event, and propagates toward the central Pacific. It can be attributed to horizontal ocean advection, heavy precipitation and the downwelling Kelvin waves. In contrast, during CPEN, the abnormally thick BL is confined to the region between 160°E and 180°E around the SSS front without significant west–east displacement. It is mainly dominated by the local processes including Ekman pumping, precipitation, and zonal ocean advection. Different from the BL in the EPEN events, it has no evident basin-scale propagating signal. © 2015, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53637
Appears in Collections: 过去全球变化的重建
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作者单位: Key Laboratory of Marine Environmental Information Technology, SOA, National Marine Data and Information Service, 93 Liuwei Road, Hedong District, Tianjin, China; Institute of Oceanography, Shanghai Jiaotong University, Shanghai, China
Recommended Citation:
Wang X.,Liu H.. Seasonal-to-interannual variability of the barrier layer in the western Pacific warm pool associated with ENSO[J]. Climate Dynamics,2016-01-01,47(2017-01-02)