气候变化领域集成服务门户(CCPortal): A Numerical Study of Wave-Driven Mean Flows and Setup Dynamics at a Coral Reef-Lagoon System

CCPortal

DOI	10.1029/2020JC016811
	A Numerical Study of Wave-Driven Mean Flows and Setup Dynamics at a Coral Reef-Lagoon System
	Rijnsdorp D.P.; Buckley M.L.; da Silva R.F.; Cuttler M.V.W.; Hansen J.E.; Lowe R.J.; Green R.H.; Storlazzi C.D.
发表日期	2021
ISSN	21699275
卷号	126 期号:4
英文摘要	Two-dimensional mean wave-driven flow and setup dynamics were investigated at a reef-lagoon system at Ningaloo Reef, Western Australia, using the numerical wave-flow model, SWASH. Phase-resolved numerical simulations of the wave and flow fields, validated with highly detailed field observations (including >10 sensors through the energetic surf zone), were used to quantify the main mechanisms that govern the mean momentum balances and resulting mean current and setup patterns, with particular attention to the role of nonlinear wave shapes. Momentum balances from the phase-resolved model indicated that onshore flows near the reef crest were primarily driven by the wave force (dominated by radiation stress gradients) due to intense breaking, whereas the flow over the reef flat and inside the lagoon and channels was primarily driven by a pressure gradient. Wave setup inside the lagoon was primarily controlled by the wave force and bottom stress. The bottom stress reduced the setup on the reef flat and inside the lagoon. Excluding the bottom stress contribution in the setup balance resulted in an over prediction of the wave-setup inside the lagoon by up to 200–370%. The bottom stress was found to be caused by the combined presence of onshore directed wave-driven currents and (nonlinear) waves. Exclusion of the bottom stress contribution from nonlinear wave shapes led to an over prediction of the setup inside the lagoon by approximately 20–40%. The inclusion of the nonlinear wave shape contribution to the bottom stress term was found to be particularly relevant in reef regions that experience a net onshore mass flux over the reef crest. © 2021. The Authors.
英文关键词	Mean bottom stress; mean flow; momentum balance; nonlinear wave shapes; reef; SWASH; wave setup
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186385
作者单位	Oceans Graduate School, University of Western Australia, Crawley, WA, Australia; School of Earth Sciences, University of Western Australia, Crawley, WA, Australia; ARC Centre of Excellence for Coral Reef Studies, Crawley, WA, Australia; U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, CA, United States; Environmental Fluid Mechanics Section, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Delft, Netherlands; U.S. Geological Survey, Saint Petersburg Coastal and Marine Science Center, Saint Petersburg, FL, United States
推荐引用方式 GB/T 7714	Rijnsdorp D.P.,Buckley M.L.,da Silva R.F.,et al. A Numerical Study of Wave-Driven Mean Flows and Setup Dynamics at a Coral Reef-Lagoon System[J],2021,126(4).
APA	Rijnsdorp D.P..,Buckley M.L..,da Silva R.F..,Cuttler M.V.W..,Hansen J.E..,...&Storlazzi C.D..(2021).A Numerical Study of Wave-Driven Mean Flows and Setup Dynamics at a Coral Reef-Lagoon System.Journal of Geophysical Research: Oceans,126(4).
MLA	Rijnsdorp D.P.,et al."A Numerical Study of Wave-Driven Mean Flows and Setup Dynamics at a Coral Reef-Lagoon System".Journal of Geophysical Research: Oceans 126.4(2021).