DOI: 10.1002/2017JC012748
Scopus记录号: 2-s2.0-85040599598
论文题名: Wind Effects on Flow Patterns and Net Fluxes in Density-Driven High-Latitude Channel Flow
作者: Huntley H.S. ; Ryan P.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 1 起始页码: 305
结束页码: 323
语种: 英语
英文关键词: channel flow
; density currents
; Ekman number
; Nares Strait
; throughflow
; wind stress
Scopus关键词: current velocity
; density current
; Ekman layer
; flow pattern
; flux measurement
; latitude
; slope
; throughflow
; two-dimensional modeling
; viscosity
; wind forcing
; wind stress
; Arctic
; Nares Strait
英文摘要: A semianalytic two-dimensional model is used to analyze the interplay between the different forces acting on density-driven flow in high-latitude channels. In particular, the balance between wind stress, viscous forces, baroclinicity, and sea surface slope adjustments under specified flux conditions is examined. Weak winds are found not to change flow patterns appreciably, with minimal (<7%) adjustments to horizontal velocity maxima. In low-viscosity regimes, strong winds change the flow significantly, especially at the surface, by either strengthening the dual-jet pattern, established without wind, by a factor of 2–3 or initiating return flow at the surface. A nonzero flux does not result in the addition of a uniform velocity throughout the channel cross section, but modifies both along-channel and cross-channel velocities to become more symmetric, dominated by a down-channel jet centered in the domain and counter-clockwise lateral flow. We also consider formulations of the model that allow adjustments of the net flux in response to the wind. Flow patterns change, beyond uniform intensification or weakening, only for strong winds and high Ekman number. Comparisons of the model results to observational data collected in Nares Strait in the Canadian Archipelago in the summer of 2007 show rough agreement, but the model misses the upstream surface jet on the east side of the strait and propagates bathymetric effects too strongly in the vertical for this moderately high eddy viscosity. Nonetheless, the broad strokes of the observed high-latitude flow are reproduced. © 2017. 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/114725
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: School of Marine Science and Policy, University of Delaware, Newark, DE, United States
Recommended Citation:
Huntley H.S.,Ryan P.. Wind Effects on Flow Patterns and Net Fluxes in Density-Driven High-Latitude Channel Flow[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(1)