DOI: 10.1002/2015GL067349
论文题名: Observations of energetic turbulence on the Weddell Sea continental slope
作者: Fer I. ; Darelius E. ; Daae K.B.
刊名: Geophysical Research Letters
ISSN: 0094-9461
EISSN: 1944-9192
出版年: 2016
卷: 43, 期: 2 起始页码: 760
结束页码: 766
语种: 英语
英文关键词: critical latitude
; Filchner Depression
; turbulence
; Weddell Sea
Scopus关键词: Kinetic energy
; Kinetics
; Tides
; Continental slope
; Critical latitude
; Dissipation rate of turbulent kinetic energy
; Filchner Depression
; Orders of magnitude
; Turbulence profile
; Vertical eddy diffusivity
; Weddell Sea
; Turbulence
; continental slope
; eddy
; energy dissipation
; kinetic energy
; latitude
; mixing
; semidiurnal tide
; slope dynamics
; turbulence
; Southern Ocean
; Weddell Sea
英文摘要: Turbulence profile measurements made on the upper continental slope and shelf of the southeastern Weddell Sea reveal striking contrasts in dissipation and mixing rates between the two sites. The mean profiles of dissipation rates from the upper slope are 1-2 orders of magnitude greater than the profiles collected over the shelf in the entire water column. The difference increases toward the bottom where the dissipation rate of turbulent kinetic energy and the vertical eddy diffusivity on the slope exceed 10-7 W kg-1 and 10-2 m2 s-1, respectively. Elevated levels of turbulence on the slope are concentrated within a 100 m thick bottom layer, which is absent on the shelf. The upper slope is characterized by near-critical slopes and is in close proximity to the critical latitude for semidiurnal internal tides. Our observations suggest that the upper continental slope of the southern Weddell Sea is a generation site of semidiurnal internal tide, which is trapped along the slope along the critical latitude, and dissipates its energy in a m thick layer near the bottom and within km across the slope. © 2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84956867600&doi=10.1002%2f2015GL067349&partnerID=40&md5=301507ee1f95c531beb7c9d5f63ca18c
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10424
Appears in Collections: 科学计划与规划 气候变化与战略
There are no files associated with this item.
作者单位: Geophysical Institute, University of Bergen, Bjerknes Centre for Climate Research, Bergen, Norway
Recommended Citation:
Fer I.,Darelius E.,Daae K.B.. Observations of energetic turbulence on the Weddell Sea continental slope[J]. Geophysical Research Letters,2016-01-01,43(2).