DOI: 10.1002/2017JC013138
Scopus记录号: 2-s2.0-85042236011
论文题名: Breakpoint Forcing Revisited: Phase Between Forcing and Response
作者: Contardo S. ; Symonds G. ; Dufois F.
刊名: Journal of Geophysical Research: Oceans
ISSN: 21699275
出版年: 2018
卷: 123, 期: 2 起始页码: 1354
结束页码: 1363
语种: 英语
英文关键词: breakpoint forcing
; infragravity waves
; long waves
Scopus关键词: beach
; gravity wave
; surf zone
; wave force
; wave generation
; wave group
英文摘要: Using the breakpoint forcing model, for long wave generation in the surf zone, expressions for the phase difference between the breakpoint-forced long waves and the incident short wave groups are obtained. Contrary to assumptions made in previous studies, the breakpoint-forced long waves and incident wave groups are not in phase and outgoing breakpoint-forced long waves and incident wave groups are not π out of phase. The phase between the breakpoint-forced long wave and the incident wave group is shown to depend on beach geometry and wave group parameters. The breakpoint-forced incoming long wave lags behind the wave group, by a phase smaller than π/2. The phase lag decreases as the beach slope decreases and the group frequency increases, approaching approximately π/16 within reasonable limits of the parameter space. The phase between the breakpoint-forced outgoing long wave and the wave group is between π/2 and π and it increases as the beach slope decreases and the group frequency increases, approaching 15π/16 within reasonable limits of the parameter space. The phase between the standing long wave (composed of the incoming long wave and its reflection) and the incident wave group tends to zero when the wave group is long compared to the surf zone width. These results clarify the phase relationships in the breakpoint forcing model and provide a new base for the identification of breakpoint forcing signal from observations, laboratory experiments and numerical modeling. © 2018. 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/114490
Appears in Collections: 气候减缓与适应
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作者单位: CSIRO Oceans and Atmosphere Flagship, Crawley, WA, Australia; UWA Oceans Institute, University of Western Australia, Crawley, WA, Australia; ARC Centre of Excellence for Coral Reef Studies, The UWA Oceans Institute, University of Western Australia, Crawley, WA, Australia
Recommended Citation:
Contardo S.,Symonds G.,Dufois F.. Breakpoint Forcing Revisited: Phase Between Forcing and Response[J]. Journal of Geophysical Research: Oceans,2018-01-01,123(2)