Numerical study on tidal duration asymmetry and shallow-water tides within multiple islands: An example of the Zhoushan Archipelago

Chu, Dongdong; Niu, Haibo; Wang, Ya Ping; Cao, Anzhou; Li, Li; Du, Yunfei; Zhang, Jicai

doi:10.1016/j.ecss.2021.107576

Cited by 12 publications

(8 citation statements)

References 44 publications

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“…The tidal data were provided by the model results of Chu et al. (2021) and were generated by using the finite volume community ocean model. The model domain covers the Yangtze River Estuary, the Zhoushan Archipelago, and the ZMCWs (120°E–127.5°E, 27°N–32.4°N).…”

Section: Methodsmentioning

confidence: 99%

“…More details regarding the settings of the model and descriptions of the data can be found in Chu et al. (2021).…”

Section: Methodsmentioning

confidence: 99%

“…The tidal data covered the period from 00:00 on February 15 to 23:00 on March 30, 2012, covering a complete spring-neap cycle. More details regarding the settings of the model and descriptions of the data can be found in Chu et al (2021).…”

Section: Tidal Wind and River Discharge Datamentioning

confidence: 99%

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Spatio‐Temporal Variability of Suspended Sediment Fronts (SSFs) on the Inner Shelf of the East China Sea: The Contribution of Multiple Factors

Zhang

Wei

et al. 2022

JGR Oceans

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Modulated by a host of complex processes, suspended sediment fronts (SSFs) on the inner shelf of the East China Sea persist strongly and vary notably. Using hourly suspended sediment concentration data collected by the Geostationary Ocean Color Imager over the period 2011–2021, a gradient‐based edge detection algorithm was implemented to extract SSFs; the frontal probability (FP) and seasonal and interannual variability were identified and interpreted. Pronounced frontal activity is principally confined to the nearshore waters within the 60‐m isobaths and decreases with increasing offshore distance. Frontogenesis is mainly determined by the bottom topography and tide‐induced mixing. Empirical orthogonal function decompositions reveal that the seasonal cycle dominates the variability of SSFs, which responds to the cycles of winds and related changes in coastal currents and upwelling. The highest FPs are identified in winter when wind‐induced suspended sediment transport and resuspension reach their annual maxima. In summer, stratification and the intrusion of Kuroshio subsurface water are not conducive to frontogenesis. Furthermore, the discharge of the Yangtze River has a certain influence on the frontal variability in the waters around the Zhoushan Archipelago. Notably, the interannual variability of SSFs is modulated by the El Niño‐Southern Oscillation. These findings, based on a comprehensive dataset of SSFs over 10 years, can usefully inform the studies of marine pollutant transport, sedimentary dynamics, fisheries, and wider ecological processes in the study area.

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Section: Methodsmentioning

confidence: 99%

“…More details regarding the settings of the model and descriptions of the data can be found in Chu et al. (2021).…”

Section: Methodsmentioning

confidence: 99%

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Spatio‐Temporal Variability of Suspended Sediment Fronts (SSFs) on the Inner Shelf of the East China Sea: The Contribution of Multiple Factors

Zhang

Wei

et al. 2022

JGR Oceans

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“…Based on the Regional Ocean Model System (ROMS [40]), Wu et al [41] established a high-resolution ocean model with two-way nesting to simulate tides in the Zhoushan Archipelago waters and found that M 4 and M 6 tides mainly originate from advective nonlinearity, not bottom friction. Chu et al [42] investigated tidal duration asymmetry induced by higher harmonics of the main constituents (M 4 , MS 4 , M 6 , and MS 6 ) in the Zhoushan Archipelago using the Finite-Volume Coastal Ocean Model (FVCOM [43]). Their numerical results indicate that tides are flood-dominant in the Zhoushan Archipelago, and tidal asymmetry is enhanced from the open sea to coastal areas.…”

Section: Tidal Modeling Without Data Assimilationmentioning

confidence: 99%

Development History of the Numerical Simulation of Tides in the East Asian Marginal Seas: An Overview

Wei

Pan

et al. 2022

JMSE

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As a ubiquitous movement in the ocean, tides are vital for marine life and numerous marine activities such as fishing and ocean engineering. Tidal dynamics are complicated in the East Asian marginal seas (EAMS) due to changing complex topography and coastlines related to human activities (e.g., land reclamation and channel deepening) and natural variability (e.g., seasonal variations of ocean stratification and river flow). As an important tool, numerical models are widely used because they can provide basin-scale patterns of tidal dynamics compared to point-based tide gauges. This paper aims to overview the development history of the numerical simulation of tides in the EAMS, including the Bohai Sea, the Yellow Sea, the East China Sea, the East/Japan Sea, and the South China Sea, provide comprehensive understanding of tidal dynamics, and address contemporary research challenges. The basic features of major tidal constituents obtained by tidal models are reviewed, and the progress in the inversion of spatially and temporally changing model parameters via the adjoint method are presented. We review numerical research on how a changing ocean environment induces tidal evolution and how tides and tidal mixing influence ocean environment in turn. The generation, propagation, and dissipation of internal tides in the EAMS are also reviewed. Although remarkable progresses in tidal dynamics have been made, nonstationary tidal variations are not fully explained yet, and further efforts are needed. In addition, tidal influences on ocean environment still receive limited attention, which deserves special attention.

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“…Generally, human activities have significant impacts on the vertical and lateral dimensions of estuarine morphology, causing variability in the above two factors, and therefore, an adjustment of the TDA. Specifically, reclamation in lateral intertidal areas can decrease the channel width and shrink intertidal storage, which favors the evolution of TDA towards flood dominance (Song et al, 2013;Gao et al, 2014;Xu et al, 2014;Li et al, 2018;Chu et al, 2021). By contrast, channel dredging and sand mining can increase water depth and channel volume, quicken tidal celerity, reduce effective friction, and strengthen tidal hydrodynamics, leading to weakening variability in tidal asymmetry (Bolle et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Responses of tidal duration asymmetry to morphological changes in Lingding Bay of the Pearl River Estuary

Yang

Zhou

et al. 2022

Front. Mar. Sci.

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Tidal asymmetry is one of the main factors for generating net transport for waterborne materials in tidal estuaries, and thus, this phenomenon has significant influences on controlling morphological development and the ecological environment. Tidal propagation is sensitive to changes in the coastline and geometry of estuarine regions. Moreover, tidal waveforms vary with various factors, such as coastline changes and bathymetry evolution due to local anthropogenic activities. The topography of Lingding Bay (LDB) of the Pearl River Estuary (PRE) has greatly changed since the 1960s because of human interventions, but the response of tidal duration asymmetry (TDA) to morphological changes is still poorly understood. Utilizing the two-dimensional Delft-3D flexible mesh numerical model, the spatial pattern of TDA and its primary contributors in LDB of the PRE were reproduced for 1964, 1989, and 2016, accounting for the changes in both shoreline and bathymetry owing to human interventions. The results reveal that as the tidal wave propagates upstream, the tidal skewness increases from negative values to positive values longitudinally, indicating the transition from a shorter ebb-duration state to a shorter flood-duration state. Additionally, a prominent shift in TDA and its primary contributors takes place approximately in the period of 1989. In 1964-1989, the tidal skewness increased by at least 0.1 throughout the LDB, indicating that the flood duration of the entire bay was shortened significantly. However, in 1989-2016, the tidal skewness decreased by at most 0.15 throughout the LDB, representing a longer flood duration in the entire LDB. The scenario simulations reveal that reclamation-induced shoreline changes control the increase in TDA and its primary contributors by enhancing width convergence of estuary in the period of 1964-1989. Conversely, the increase in water depth plays a vital role in the decrease of TDA in the period of 1989-2016. The results obtained from this study are particularly useful for understanding the controlled factors contributing to net sediment transport and the associated long-term morphological evolution in estuaries heavily impacted by human interventions.

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Numerical study on tidal duration asymmetry and shallow-water tides within multiple islands: An example of the Zhoushan Archipelago

Cited by 12 publications

References 44 publications

Spatio‐Temporal Variability of Suspended Sediment Fronts (SSFs) on the Inner Shelf of the East China Sea: The Contribution of Multiple Factors

Spatio‐Temporal Variability of Suspended Sediment Fronts (SSFs) on the Inner Shelf of the East China Sea: The Contribution of Multiple Factors

Development History of the Numerical Simulation of Tides in the East Asian Marginal Seas: An Overview

Responses of tidal duration asymmetry to morphological changes in Lingding Bay of the Pearl River Estuary

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