气候变化领域集成服务门户(CCPortal): The Contribution of Currents, Sea-Swell Waves, and Infragravity Waves to Suspended-Sediment Transport Across a Coral Reef-Lagoon System

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DOI	10.1029/2020JC017010
	The Contribution of Currents, Sea-Swell Waves, and Infragravity Waves to Suspended-Sediment Transport Across a Coral Reef-Lagoon System
	Pomeroy A.W.M.; Storlazzi C.D.; Rosenberger K.J.; Lowe R.J.; Hansen J.E.; Buckley M.L.
发表日期	2021
ISSN	21699275
卷号	126 期号:3
英文摘要	Coral reefs generate substantial volumes of carbonate sediment, which is redistributed throughout the reef-lagoon system. However, there is little understanding of the specific processes that transport this sediment produced on the outer portions of coral reefs throughout a reef-lagoon system. Furthermore, the separate contributions of currents, sea-swell waves, and infragravity waves to transport, which are all strongly influenced by the presence of a reef, is not fully understood. Here, we show that in reef-lagoon systems most suspended sediment is transported close to the seabed and can, at times, be suspended higher in the water column during oscillatory flow transitions (i.e., near slack flow) at sea-swell wave frequencies, and during the peak onshore oscillatory velocity phase at infragravity wave frequencies. While these wave frequencies contribute to the transport of suspended sediment offshore and onshore, respectively, the net flux is small. Mean currents are the primary transport mechanism and responsible for almost 2 orders of magnitude more suspended-sediment flux than sea-swell and infragravity waves. Whilst waves may not be the primary mechanism for the transport of sediment, our results suggest they are an important driver of sediment suspension from the seabed, as well as contributing to the partitioning of sediment grain sizes from the reef to the shoreline. As the ocean wave climate changes, sea level rises, and the composition of reef benthic communities change, the relative importance of mean currents, sea-swell waves, and infragravity waves is likely to change, and this will affect how sediment is redistributed throughout reef-lagoon systems. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	bedload; coral reef; infragravity wave; sediment transport; suspended sediment; swell waves
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/186432
作者单位	Oceans Graduate School, The University of Western Australia, Perth, WA, Australia; UWA Oceans Institute, The University of Western Australia, Perth, WA, Australia; Australian Institute of Marine Science, Perth, WA, Australia; U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz, CA, United States; School of Earth Science, The University of Western Australia, Perth, WA, Australia; U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center, St. Petersburg, FL, United States
推荐引用方式 GB/T 7714	Pomeroy A.W.M.,Storlazzi C.D.,Rosenberger K.J.,et al. The Contribution of Currents, Sea-Swell Waves, and Infragravity Waves to Suspended-Sediment Transport Across a Coral Reef-Lagoon System[J],2021,126(3).
APA	Pomeroy A.W.M.,Storlazzi C.D.,Rosenberger K.J.,Lowe R.J.,Hansen J.E.,&Buckley M.L..(2021).The Contribution of Currents, Sea-Swell Waves, and Infragravity Waves to Suspended-Sediment Transport Across a Coral Reef-Lagoon System.Journal of Geophysical Research: Oceans,126(3).
MLA	Pomeroy A.W.M.,et al."The Contribution of Currents, Sea-Swell Waves, and Infragravity Waves to Suspended-Sediment Transport Across a Coral Reef-Lagoon System".Journal of Geophysical Research: Oceans 126.3(2021).