DOI: 10.1007/s00382-015-2971-9
Scopus记录号: 2-s2.0-84953397694
论文题名: Contrasting the eastern Pacific El Niño and the central Pacific El Niño: process-based feedback attribution
作者: Hu X. ; Yang S. ; Cai M.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2016
卷: 47, 期: 2017-07-08 起始页码: 2413
结束页码: 2424
语种: 英语
英文关键词: Air–sea coupled thermodynamic process
; El Niño
; SST anomaly
; Water–vapor feedback
英文摘要: This paper examines the roles of radiative and non-radiative air–sea coupled thermodynamic processes in modifying sea surface temperature (SST) anomalies driven by (air–sea coupled) oceanic dynamic processes, focusing on their contributions to the key differences between the eastern Pacific (EP) El Niño and the central Pacific (CP) El Niño. The attribution is achieved by decomposing SST anomalies into partial temperature anomalies due to individual processes using a coupled atmosphere-surface climate feedback-response analysis method. Oceanic processes induce warming from the central to the eastern equatorial Pacific and cooling over the western basin with a maximum warming center in the central Pacific for both types of El Niño. The processes that act to oppose the oceanic process-induced SST anomalies are surface latent heat flux, sensible heat flux, cloud, and atmospheric dynamic feedbacks, referred to as negative-feedback processes. The cooling due to each of the four negative-feedback processes is the strongest in the region where the initial warming due to oceanic processes is the largest. Water–vapor feedback is the sole process that acts to enhance the initial warming induced by oceanic processes. The increase in atmospheric water vapor over the eastern Pacific is much stronger for the EP El Niño than for the CP El Niño. It is the strong water–vapor feedback over the eastern Pacific and the strong negative feedbacks over the central equatorial Pacific that help to relocate the maximum warming center from the central Pacific to the eastern basin for the EP El Niño. © 2016, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53535
Appears in Collections: 过去全球变化的重建
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作者单位: School of Atmospheric Sciences and Institute of Earth Climate and Environment System, Sun Yat-sen University, 135 West Xingang Road, Guangzhou, China; Department of Earth, Ocean, and Atmospheric Science, Florida State University, Tallahassee, FL, United States
Recommended Citation:
Hu X.,Yang S.,Cai M.. Contrasting the eastern Pacific El Niño and the central Pacific El Niño: process-based feedback attribution[J]. Climate Dynamics,2016-01-01,47(2017-07-08)