DOI: 10.1175/JCLI-D-16-0480.1
Scopus记录号: 2-s2.0-85018956597
论文题名: Atmospheric energetics over the tropical Pacific during the ENSO cycle
作者: Dong D. ; Li J. ; Huyan L. ; Xue J.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 10 起始页码: 3635
结束页码: 3654
语种: 英语
Scopus关键词: Atmospheric pressure
; Atmospheric thermodynamics
; Feedback
; Kinetic energy
; Kinetics
; Nickel
; Oceanography
; Potential energy
; Tropics
; Troposphere
; Atmosphere-ocean interactions
; Energy transport
; ENSO
; Hadley circulation
; Mass fluxes/transport
; Wind effects
英文摘要: The atmospheric perturbation potential energy (PPE) over the tropical Pacific is calculated and analyzed in a composite ENSO cycle. The PPE over the tropical Pacific troposphere increases during El Niño and decreases during La Niña, displaying two centers symmetrical about the equator and delaying the central-eastern Pacific SST anomaly by two months. Generated from atmospheric diabatic heating, the smaller part of PPE in the lower troposphere varies synchronously with the central-eastern Pacific SST through sensible heating, while the larger part of PPE lies in the mid- and upper troposphere and lags the central-eastern Pacific SST about one season because of latent heat release. As the tropical Pacific PPE peaks during the boreal late winter in an El Niño event, two anticyclones form in the upper troposphere as a result of the Gill model response. More PPE is converted to atmospheric kinetic energy (KE) above the central-western Pacific, but less over the eastern Pacific, leading to intensified Hadley circulations over the central-western Pacific and weakened Hadley circulations over the eastern Pacific. The strengthened Hadley circulations cause surface easterly wind bursts through KE convergence in the western equatorial Pacific, which may trigger a La Niña event. The reverse situation occurs during La Niña. Thus, the response of the Hadley circulations in the central-western Pacific provides a negative feedback during the ENSO cycle. © 2017 American Meteorological Society. 资助项目: NSFC, National Natural Science Foundation of China
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49680
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Lab. of Numerical Modeling for Atmospheric Sciences, Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Beijing, China; College of Earth Science, University of Chinese Academy of Sciences, Beijing, China; State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing, China; College of Global Change and Earth System Science, Beijing Normal University, Beijing, China; Joint Center for Global Change Studies, Beijing, China
Recommended Citation:
Dong D.,Li J.,Huyan L.,et al. Atmospheric energetics over the tropical Pacific during the ENSO cycle[J]. Journal of Climate,2017-01-01,30(10)