DOI: 10.1007/s00382-017-3725-7
Scopus记录号: 2-s2.0-85026462794
论文题名: Dynamical diagnostics of the SST annual cycle in the eastern equatorial Pacific: part I a linear coupled framework
作者: Chen Y.-Y. ; Jin F.-F.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 50, 期: 2018-05-06 起始页码: 1841
结束页码: 1862
语种: 英语
英文关键词: External forcing
; Ocean–atmosphere interaction
; SST annual cycle
; Westward propagation
Scopus关键词: advection
; air-sea interaction
; annual variation
; atmospheric dynamics
; Ekman pumping
; El Nino-Southern Oscillation
; radiative forcing
; sea surface temperature
; solar radiation
; thermodynamics
; wave propagation
; Pacific Ocean
; Pacific Ocean (Equatorial)
英文摘要: The eastern equatorial Pacific has a pronounced westward propagating SST annual cycle resulting from ocean–atmosphere interactions with equatorial semiannual solar forcing and off-equatorial annual solar forcing conveyed to the equator. In this two-part paper, a simple linear coupled framework is proposed to quantify the internal dynamics and external forcing for a better understanding of the linear part of the dynamics annual cycle. It is shown that an essential internal dynamical factor is the SST damping rate which measures the coupled stability in a similar way as the Bjerknes instability index for the El Niño-Southern Oscillation. It comprises three major negative terms (dynamic damping due to the Ekman pumping feedback, mean circulation advection, and thermodynamic feedback) and two positive terms (thermocline feedback and zonal advection). Another dynamical factor is the westward-propagation speed that is mainly determined by the thermodynamic feedback, the Ekman pumping feedback, and the mean circulation. The external forcing is measured by the annual and semiannual forcing factors. These linear internal and external factors, which can be estimated from data, determine the amplitude of the annual cycle. © 2017, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109392
Appears in Collections: 影响、适应和脆弱性 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 Sciences, Guangzhou, China; University of Chinese Academy of Sciences, Beijing, China; Department of Atmospheric Sciences, School of Ocean and Earth Science and Technology, University of Hawaii at Manoa, Honolulu, HI, United States; Nanjing University of Information Science and Technology, Nanjing, China
Recommended Citation:
Chen Y.-Y.,Jin F.-F.. Dynamical diagnostics of the SST annual cycle in the eastern equatorial Pacific: part I a linear coupled framework[J]. Climate Dynamics,2018-01-01,50(2018-05-06)