DOI: 10.1002/2017JC013298
Scopus记录号: 2-s2.0-85044432287
论文题名: Patterns of Vertical Velocity Induced by Eddy Distortion in an Ocean Model
作者: Pilo G.S. ; Oke P.R. ; Coleman R. ; Rykova T. ; Ridgway K.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 3 起始页码: 2274
结束页码: 2292
语种: 英语
英文关键词: anticyclonic eddy
; eddy distortion
; eddy isotropy
; ocean model
; relative vorticity
; stratification
Scopus关键词: anticyclone
; eddy
; isotropy
; model
; sea level
; Southern Hemisphere
; stratification
; velocity
; vertical movement
; East Australian Current
; Pacific Ocean
英文摘要: Vertical motions within eddies play an important role in the exchange of properties and energy between the upper ocean and the ocean interior. Here we analyze alternating upward and downward cells in anticyclonic eddies in the East Australian Current region using a global eddy-resolving model. The cells explain over 50% of the variance of vertical velocity within these eddies. We show that the upward and downward cells relate to eddy distortion, defined as the change in eddy shape over time. In anticyclonic eddies in the Southern Hemisphere, an inward distortion is associated with upward motion and an outward distortion is associated with downward motion. We discuss two mechanisms that link eddy distortion to vertical velocity. One mechanism relates to changes in stratification and relative vorticity in the eddy interior. The other mechanism relates to divergence of the horizontal flow in different quadrants of the eddy. We show that mesoscale changes in sea level anomaly can be used to infer the vertical motion within eddies. © 2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114333
Appears in Collections: 气候减缓与适应
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作者单位: Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, TAS, Australia; CSIRO Oceans and Atmosphere Flagship, Hobart, TAS, Australia; Antarctic Climate and Ecosystems CRC, Hobart, TAS, Australia
Recommended Citation:
Pilo G.S.,Oke P.R.,Coleman R.,et al. Patterns of Vertical Velocity Induced by Eddy Distortion in an Ocean Model[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(3)