Characterization of spatial and temporal variation of suspended sediments in the Yellow and East China Seas using satellite ocean color data

Son, Seung-Hyun; Kim, Yong Hoon; Kwon, Jungkee; Kim, Hae-Cheol; Park, Kwang-Soon

doi:10.1080/15481603.2014.895580

Cited by 37 publications

(24 citation statements)

References 18 publications

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“…The model reproduced the sediment plume over the Yangtze Bank, which matches well with the satellite image in Figure a. The simulated distribution of SSC consistently compared well with the observed data (Bian et al, ; Dong et al, ) and the monthly mean satellite ocean color data (Son et al, ; Yuan et al, ). However, we cannot confirm whether the sediment plume originated from advection transport or from local bottom suspension.…”

Section: Resultssupporting

confidence: 78%

Dynamics of the Sediment Plume Over the Yangtze Bank in the Yellow and East China Seas

Luo

Zhu

et al. 2017

JGR Oceans

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A distinct sediment plume exists over the Yangtze Bank in the Yellow and East China Seas (YECS) in winter, but it disappears in summer. Based on satellite color images, there are two controversial viewpoints about the formation mechanism for the sediment plume. One viewpoint is that the sediment plume forms because of cross‐shelf sediment advection of highly turbid water along the Jiangsu coast. The other viewpoint is that the formation is caused by local bottom sediment resuspension and diffused to the surface layer through vertical turbulent mixing. The dynamic mechanism of the sediment plume formation has been unclear until now. This issue was explored by using a numerical sediment model in the present paper. Observed wave, current, and sediment data from 29 December 2016 to 16 January 2017 were collected near the Jiangsu coast and used to validate the model. The results indicated that the model can reproduce the hydrodynamic and sediment processes. Numerical experiments showed that the bottom sediment could be suspended by the bottom shear stress and diffuse to the surface layer by vertical mixing in winter; however, the upward diffusion is restricted by the strong stratification in summer. The sediment plume is generated locally due to bottom sediment resuspension primarily via tide‐induced bottom shear stress rather than by cross‐shelf sediment advection over the Yangtze Bank.

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Section: Resultssupporting

confidence: 78%

Dynamics of the Sediment Plume Over the Yangtze Bank in the Yellow and East China Seas

Luo

Zhu

et al. 2017

JGR Oceans

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“…The diurnal variations in TSM are frequently observed in other regions, for example, in the Bohai and ECS Seas [37,46], in the Southern North Sea [66,67]. The tide-induced turbulent mixing and wave-current interaction in the inner shelf region of YS are capable of stirring a large amount of sediment to the surface layer, resulting in TSM variations [46,49,68], which could further influence turbidity frontal patterns through sediment resuspension and deposition.…”

Section: Discussionmentioning

confidence: 96%

“…The tide-induced turbulent mixing and wave-current interaction in the inner shelf region of YS are capable of stirring a large amount of sediment to the surface layer, resulting in TSM variations [46,49,68], which could further influence turbidity frontal patterns through sediment resuspension and deposition. During the ebb-flood transition or slack water, the reduced bottom shear stress weakens the vertical sediment resuspension, which might induce high-frequency seaward and shoreward oscillation at the B1 front (Figure 4d) and make it mix more easily with its neighboring fronts because of the front position close to the coast.…”

Section: Discussionmentioning

confidence: 99%

“…A large amount of sediments had accumulated in the region due to the discharge of the old Yellow River for more than 700 years [48]. Its long-term turbidity featured with high temporal and spatial variability, mainly dominated by strong tidal currents and wind-induced vertical mixing, is frequently found based on satellite data and in situ measurements [46,48,49]. SKCW is characterized by narrow continental shelf with water depth less than 50 m and around 1036.9 km 2 Figure 1.…”

Section: Introductionmentioning

confidence: 96%

“…Moreover, the diurnal displacement of turbidity fronts during spring tide in NJSW was compared with it during neap tide to examine its response to spring-neap tidal changes. The reason for selecting NJSW and SKCW is that both of them have significantly diurnal variations of water turbidity mainly driven by tidal currents [38,45,46]. NJSW is located in a wide continental shelf with water depth less than 50 m and around 5001.7 km 2 tidal flats [47].…”

Section: Introductionmentioning

confidence: 99%

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Diurnal Variability of Turbidity Fronts Observed by Geostationary Satellite Ocean Color Remote Sensing

Pan

et al. 2016

Remote Sensing

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Abstract:Monitoring front dynamics is essential for studying the ocean's physical and biogeochemical processes. However, the diurnal displacement of fronts remains unclear because of limited in situ observations. Using the hourly satellite imageries from the Geostationary Ocean Color Imager (GOCI) with a spatial resolution of 500 m, we investigated the diurnal displacement of turbidity fronts in both the northern Jiangsu shoal water (NJSW) and the southwestern Korean coastal water (SKCW) in the Yellow Sea (YS). The hourly turbidity fronts were retrieved from the GOCI-derived total suspended matter using the entropy-based algorithm. The results showed that the entropy-based algorithm could provide fine structure and clearly temporal evolution of turbidity fronts. Moreover, the diurnal displacement of turbidity fronts in NJSW can be up to 10.3 km in response to the onshore-offshore movements of tidal currents, much larger than it is in SKCW (around 4.7 km). The discrepancy between NJSW and SKCW are mainly caused by tidal current direction relative to the coastlines. Our results revealed the significant diurnal displacement of turbidity fronts, and highlighted the feasibility of using geostationary ocean color remote sensing technique to monitor the short-term frontal variability, which may contribute to understanding of the sediment dynamics and the coupling physical-biogeochemical processes.

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Horizontal distribution of Changjiang Diluted Water in summer inferred from total suspended sediment in the Yellow Sea and East China Sea

2015

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Characterization of spatial and temporal variation of suspended sediments in the Yellow and East China Seas using satellite ocean color data

Cited by 37 publications

References 18 publications

Dynamics of the Sediment Plume Over the Yangtze Bank in the Yellow and East China Seas

Dynamics of the Sediment Plume Over the Yangtze Bank in the Yellow and East China Seas

Diurnal Variability of Turbidity Fronts Observed by Geostationary Satellite Ocean Color Remote Sensing

Horizontal distribution of Changjiang Diluted Water in summer inferred from total suspended sediment in the Yellow Sea and East China Sea

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