DOI: 10.1002/2013GL057956
论文题名: Mechanisms for the emergence of ocean striations in the North Pacific
作者: Davis A. ; Di Lorenzo E. ; Luo H. ; Belmadani A. ; Maximenko N. ; Melnichenko O. ; Schneider N.
刊名: Geophysical Research Letters
ISSN: 0094-10388
EISSN: 1944-10119
出版年: 2014
卷: 41, 期: 3 起始页码: 948
结束页码: 953
语种: 英语
英文关键词: California Current System
; currents
; meanders
; striations
Scopus关键词: Geometry
; Ocean currents
; Velocity
; Vorticity
; California current systems
; Eastern boundary current
; Eddy-permitting model
; Essential dynamics
; meanders
; Nonlinearity of the flows
; Potential vorticity
; striations
; Computer simulation
; air-sea interaction
; atmospheric forcing
; boundary current
; eddy
; geometry
; gyre
; linearity
; magnitude
; mesoscale meteorology
; numerical model
; observational method
; oceanic current
; potential vorticity
; velocity
; wind stress
; California Current
; Pacific Ocean
; Pacific Ocean (Northeast)
英文摘要: Recent observations suggest that the mean mesoscale oceanic zonal velocity field is dominated by alternating jet-like features often referred to as striations. Here the generating dynamics of Northeast Pacific striations are explored with a set of 120 year eddy-permitting model simulations. Simulations are conducted with decreasing complexity toward idealized configurations retaining the essential dynamics and forcing necessary for striation development. For each simulation, we diagnose the spin-up of the ocean model and the sensitivity of striation generation to topography, coastal geometry, and wind stress, which modulates the gyre circulation and the nonlinearity of the flow field. Results indicate that Northeast Pacific striations develop predominantly at the eastern boundary and migrate westward in congruence with beta-plumes in both the nonlinear and quasi-linear regimes. Mean striations are governed by coastline geometry, which provides quasi-steady vorticity sources energized by eastern boundary current instabilities. Key Points Northeast Pacific striations form as coastal vorticity propagates offshore via beta-plumes Vorticity is anchored by coastal geometry, so striations remain stationary Striation magnitude is constrained at the shelf by potential vorticity trapping ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84893660428&doi=10.1002%2f2013GL057956&partnerID=40&md5=ab51fe0ae21350ce5d1f6750fcee5b37
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7652
Appears in Collections: 气候减缓与适应
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作者单位: School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, United States
Recommended Citation:
Davis A.,Di Lorenzo E.,Luo H.,et al. Mechanisms for the emergence of ocean striations in the North Pacific[J]. Geophysical Research Letters,2014-01-01,41(3).