DOI: 10.1002/2016GL069462
论文题名: Trains of large Kelvin-Helmholtz billows observed in the Kuroshio above a seamount
作者: Chang M.-H. ; Jheng S.-Y. ; Lien R.-C.
刊名: Geophysical Research Letters
ISSN: 0094-8770
EISSN: 1944-8501
出版年: 2016
卷: 43, 期: 16 起始页码: 8654
结束页码: 8661
语种: 英语
英文关键词: Kelvin-Helmholtz instability
; Kuroshio
; secondary instability
; turbulent mixing
Scopus关键词: Energy dissipation
; Kinetic energy
; Kinetics
; Mixing
; Shear flow
; Submarine geology
; Buoyancy frequency
; Kelvin- helmholtz instabilities
; Kelvin-Helmholtz billows
; Kuroshio
; Secondary instability
; Turbulence mixing
; Turbulent kinetic energy
; Turbulent mixing
; Ocean currents
英文摘要: Trains of large Kelvin-Helmholtz (KH) billows within the Kuroshio current at ~230 m depth off southeastern Taiwan and above a seamount were observed by shipboard instruments. The trains of large KH billows were present in a strong shear band along the 0.55 m s−1 isotach within the Kuroshio core; they are presumably produced by flow interactions with the rapidly changing topography. Each individual billow, resembling a cat's eye, had a horizontal length scale of 200 m, a vertical scale of 100 m, and a timescale of 7 min, near the local buoyancy frequency. Overturns were observed frequently in the billow cores and the upper eyelids. The turbulent kinetic energy dissipation rates estimated using the Thorpe scale had an average value of O(10−4) W kg−1 and a maximum value of O(10−3) W kg−1. The turbulence mixing induced by the KH billows may exchange Kuroshio water with the surrounding water masses. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84983803079&doi=10.1002%2f2016GL069462&partnerID=40&md5=f7670c970a591538dfe2b9030bf9635e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9733
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Institute of Oceanography, National Taiwan University, Taipei, Taiwan
Recommended Citation:
Chang M.-H.,Jheng S.-Y.,Lien R.-C.. Trains of large Kelvin-Helmholtz billows observed in the Kuroshio above a seamount[J]. Geophysical Research Letters,2016-01-01,43(16).