DOI: 10.1002/grl.50919
论文题名: Statistics of vertical vorticity, divergence, and strain in a developed submesoscale turbulence field
作者: Shcherbina A.Y. ; D'Asaro E.A. ; Lee C.M. ; Klymak J.M. ; Molemaker M.J. ; McWilliams J.C.
刊名: Geophysical Research Letters
ISSN: 0094-8570
EISSN: 1944-8301
出版年: 2013
卷: 40, 期: 17 起始页码: 4706
结束页码: 4711
语种: 英语
英文关键词: observations
; skewness
; statistics
; submesoscale
; turbulence
; vorticity
Scopus关键词: Acoustic Doppler Current Profilers
; High-resolution numerical models
; observations
; skewness
; submesoscale
; Velocity gradients
; Vertical vorticity
; Vorticity distribution
; Higher order statistics
; Statistics
; Turbulence
; Vorticity
; Acoustic Doppler Current Profiler
; divergence
; mixed layer
; mode water
; numerical model
; sampling
; skewness
; turbulence
; upper ocean
; vorticity
; winter
; Atlantic Ocean
; Atlantic Ocean (North)
英文摘要: A detailed view of upper ocean vorticity, divergence, and strain statistics was obtained by a two-vessel survey in the North Atlantic Mode Water region in winter 2012. Synchronous Acoustic Doppler Current Profiler sampling provided the first in situ estimates of the full velocity gradient tensor at O(1 km) scale without the usual mix of spatial and temporal aliasing. The observed vorticity distribution in the mixed layer was markedly asymmetric (skewness 2.5), with sparse strands of strong cyclonic vorticity embedded in a weak, predominantly anticyclonic background. Skewness of the vorticity distribution decreased linearly with depth, disappearing completely in the pycnocline. Statistics of divergence and strain rate generally followed the normal and χ distributions, respectively. These observations confirm a high-resolution numerical model prediction for the structure of the active submesoscale turbulence field in this area. Key Points Vorticity, divergence, and strain of submesoscale turbulence observed directly Distribution of vorticity in the upper ocean is highly asymmetric in winter Observed statistics of active submesoscale turbulence confirm model predictions ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84883708104&doi=10.1002%2fgrl.50919&partnerID=40&md5=3aed129e030cb6a1a2f2b1b8cdd8187e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5834
Appears in Collections: 气候减缓与适应
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作者单位: Applied Physics Laboratory, University of Washington, 1013 NE 40th St., Seattle, WA 98105, United States
Recommended Citation:
Shcherbina A.Y.,D'Asaro E.A.,Lee C.M.,et al. Statistics of vertical vorticity, divergence, and strain in a developed submesoscale turbulence field[J]. Geophysical Research Letters,2013-01-01,40(17).