气候变化领域集成服务门户(CCPortal): Seasonal Variation in Sediment Delivery Across the Bay-Marsh Interface of an Estuarine Salt Marsh

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DOI	10.1029/2019JC015268
	Seasonal Variation in Sediment Delivery Across the Bay-Marsh Interface of an Estuarine Salt Marsh
	Lacy J.R.; Foster-Martinez M.R.; Allen R.M.; Ferner M.C.; Callaway J.C.
发表日期	2020
ISSN	21699275
卷号	125 期号:1
英文摘要	Sediment transport across bay-marsh interfaces depends on wave energy, vegetation, and marsh-edge morphology and varies over a range of timescales. We investigated these dynamics in a tidal salt marsh with a gently sloped, vegetated edge adjacent to northern San Francisco Bay. Spartina foliosa (cordgrass) inhabits the lower marsh and Salicornia pacifica (pickleweed) predominates on the marsh plain. We measured suspended-sediment concentration (SSC) and hydrodynamics in bay shallows and along a 100-m cross-shore transect in the marsh, during winter and summer. Four-year averaged accretion measured with marker-horizon plots was twice as great along the marsh transect as adjacent to a tidal creek, 50 m from the bay. We estimated deposition and trapping efficiency from the time series data to assess its variation with season and wave energy. At high tide the transition zone (between cordgrass and pickleweed) was usually erosional, the pickleweed zone was depositional, and both erosion and deposition increased with wave energy, as did the landward position of maximum deposition. Erosion from the transition zone accounted for approximately one third of the sediment flux into the pickleweed. In the pickleweed zone, SSC, the difference between flood- and ebb-tide SSC, and trapping efficiency were greater in summer than winter for comparable wave conditions, which we attribute to increased sediment trapping by dense summer cordgrass. Moderate waves in summer (46%) accounted for more annual accretion in the pickleweed zone than larger waves in winter (28%), although the contribution of winter storms was diminished by the dry winter during the study. ©2019. American Geophysical Union. All Rights Reserved.
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/187025
作者单位	Pacific Coastal and Marine Science Center, U.S. Geological Survey, Santa Cruz, CA, United States; Department of Civil and Environmental Engineering, University of California, Berkeley, CA, United States; Pontchartrain Institute for Environmental Sciences, University of New Orleans, New Orleans, LA, United States; San Francisco Bay National Estuarine Research Reserve, Estuary and Ocean Science Center, San Francisco State University, Tiburon, CA, United States; Department of Environmental Science, University of San Francisco, San Francisco, CA, United States; Delta Science Program, Delta Stewardship Council, Sacramento, CA, United States
推荐引用方式 GB/T 7714	Lacy J.R.,Foster-Martinez M.R.,Allen R.M.,et al. Seasonal Variation in Sediment Delivery Across the Bay-Marsh Interface of an Estuarine Salt Marsh[J],2020,125(1).
APA	Lacy J.R.,Foster-Martinez M.R.,Allen R.M.,Ferner M.C.,&Callaway J.C..(2020).Seasonal Variation in Sediment Delivery Across the Bay-Marsh Interface of an Estuarine Salt Marsh.Journal of Geophysical Research: Oceans,125(1).
MLA	Lacy J.R.,et al."Seasonal Variation in Sediment Delivery Across the Bay-Marsh Interface of an Estuarine Salt Marsh".Journal of Geophysical Research: Oceans 125.1(2020).