Impact of Typhoon Chan-hom on sediment dynamics and morphological changes on the East China Sea inner shelf

Cong, Shuai; Wu, Xiao; Ge, Jianzhong; Bi, Naishuang; Li, Yunhai; Lü, Jian; Wang, Houjie

doi:10.1016/j.margeo.2021.106578

Cited by 31 publications

(24 citation statements)

References 78 publications

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“…And the model results overall well matched the observational data from different sources as the root-mean-square deviation (RMSD) values of variables are less than 0.8, and the correlation coefficients are high up to >0.83 (More detailed could be seen in Cong et al, 2021). Overall, it presents a satisfying performance for simulating the regional ocean dynamic processes, especially under the impact of Chan-Hom (Cong et al, 2021).…”

Section: Numerical Modelingsupporting

confidence: 59%

“…An Unstructured Grid, Finite-Volume Community Ocean Model (FVCOM) (Chen et al, 2003(Chen et al, , 2006 was also utilized to investigate the variation of residual currents in the cross-shelf and along-shelf direction under the impact of Typhoon Chan-Hom. The model domain contains the entire ECS, Yellow and Bohai Seas, with the horizontal resolution of the mesh varied from ~1-3 km near the Zhejiang-Fujian coast to around 10-20 km at the open boundary (Cong et al, 2021). In order to capture ocean response to synoptic wind events, the hourly sea surface forcing data was derived from the National Center for Environmental Prediction (NCEP) Climate…”

Section: Numerical Modelingmentioning

confidence: 99%

“…The model was validated with multiple observational datasets under normal weather conditions as well as during Typhoon Chan-Hom (Cong et al, 2021). And the model results overall well matched the observational data from different sources as the root-mean-square deviation (RMSD) values of variables are less than 0.8, and the correlation coefficients are high up to >0.83 (More detailed could be seen in Cong et al, 2021). Overall, it presents a satisfying performance for simulating the regional ocean dynamic processes, especially under the impact of Chan-Hom (Cong et al, 2021).…”

Section: Numerical Modelingmentioning

confidence: 99%

“…To clarify Typhoon Chan-Hom's impact on the water discharge into the study area, we rerun the FVCOM (Cong et al, 2021) to compute the hourly residual current crossing the four cross-shelf survey transects (I, II, III, and IV) and four along-shelf transects (L1, L2, L3, and L4, see Figure 1b), which allowed us to calculate the time variation of water discharge (𝑄) in both the alongshore and cross-shore directions:…”

Section: Downcoast Transport Of Typhoon-indued Cdwmentioning

confidence: 99%

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Downcoast Redistribution of Changjiang Diluted Water due to Typhoon Chan-Hom (2015)

Lin

Cong

et al. 2023

Preprint

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Typhoons are known to substantially influence the coastal circulation and the associated biogeochemical processes. The transport of Changjiang Diluted Water (CDW), an important source to the coastal current in the East China Sea (ECS), varies markedly under the influence of typhoons. This study quantitively details the downcoast transport of CDW driven by Typhoon Chan-Hom in the summer of 2015. Salinity measurements 3 days after the typhoon’s passage showed the presence of a large volume of low salinity water, up to 70 km wide and 20 m thick along the Zhejiang-Fujian coastal area with an estimated freshwater volume of 3.7×1010 m3. A three-endmember mixing model shows that the CDW’s contribution to the study area’s surface waters (<10 m) immediately after the typhoon was as high as 40% (average 32%), much greater than the contribution under normal summer conditions of 8% (average 3%). The vast spreading of CDW along the Zhejiang-Fujian coast created a strong stratification in the upper water column that limited the diffusion of CDW in the study area. The calculated and observed results suggest that these abnormal low salinity water could stay in the study area for 13-21 days. Additional nutrients in the CDW elevated the Chlorophyll-a concentration in the upper water column (mean 3.74 mg m-3) and produced large amount of particulate organic carbon (POC).

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Section: Numerical Modelingsupporting

confidence: 59%

Section: Numerical Modelingmentioning

confidence: 99%

Section: Numerical Modelingmentioning

confidence: 99%

Section: Downcoast Transport Of Typhoon-indued Cdwmentioning

confidence: 99%

See 2 more Smart Citations

Downcoast Redistribution of Changjiang Diluted Water due to Typhoon Chan-Hom (2015)

Lin

Cong

et al. 2023

Preprint

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“…Typhoons are extreme weather events that cause serious social and economic losses in coastal and estuarine areas worldwide (Peduzzi et al, 2012;Walsh et al, 2016;Cong et al, 2021). Owing to strong sea-air interactions, typhoons have remarkable effects on water level rise (Wang et al, 2020), tidal range changes (Pan et al, 2021;Wang et al, 2021), water circulation structure (Wu et al, 2016), sediment transport (Liu et al, 2011), and sea bed evolution (van Rijn, 2011;Xu, 2019).…”

Section: Introductionmentioning

confidence: 99%

Suspended sediment dynamics in macrotidal turbid Hangzhou Bay during Typhoon Chan-hom

Shen

et al. 2022

Front. Earth Sci.

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Typhoons are extreme weather events that cause serious social and economic losses in coastal and estuarine areas worldwide. Understanding the impact of typhoons on sediment dynamics is essential for protecting coastal areas from these marine disasters. Hangzhou Bay is macro-tidal, turbid, and frequently affected by strong typhoons. In this study, we established and validated a three-dimensional model coupling waves, current, and sediment to investigate the sediment dynamics in Hangzhou Bay during Typhoon Chan-hom. The results showed that high suspended sediment concentration (SSC) areas during the typhoon were mainly located at the bay head and near the southern shore near the Andong tidal flat. The maximum bottom SSC was at least twice that near the surface. The peak bottom SSC values at the peak flood (6 g/L) were larger than those at the peak ebb (5 g/L) owing to the stronger current velocity at peak flood. The SSC near the northern shore was larger at the peak flood than at other times, and the SSC was high at the southern shore at peak ebb at the cross-section near the Andong tidal flat. The typhoon impacted SSC by changing the bottom stress. SSC was most influenced by wave action, followed by wind stress action, and was least influenced by air pressure action, which contributed 71.3%, 69.9%, and 1.8% to the bottom stress, respectively. Our findings are scientifically important for research on geomorphological evolution and are practically meaningful for coastal management.

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Response of a patchy intertidal mudflat‐marsh transition zone to a typhoon

Xue,

Shi,

Schoutens

et al. 2024

Limnology & Oceanography

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While tidal marshes are valued for their ability to reduce the impact of storm waves on shores, there is still more limited understanding of how storm waves impact the integrity of tidal marshes, particularly in mudflat‐marsh transition zones with patchy vegetation cover. This study aims to investigate changes in hydrodynamics, sediment bed elevation, and patchy vegetation cover along the sea‐to‐land elevation gradient in response to super typhoon IN‐FA, making landfall in 2021 in a mudflat‐marsh transition zone of the Yangtze Estuary (China). Utilizing in‐situ measurements and drone surveys, our results show: (1) A landward decrease in storm‐induced wave energy, flow velocities, turbulence, and erosion across a 200‐m mudflat‐marsh transition zone; (2) Elevation‐dependent spatial reconfiguration of marsh vegetation patches in response to the storm; (3) Different marsh response below and above an elevation threshold where a shift between marsh gain and marsh loss occurred. The observed landward decrease in storm‐induced marsh loss is attributed to a trade‐off between reduced disturbances due to landward increasing friction from the sediment bed and vegetation, and the landward increasing capacity of the vegetation to cope with disturbances. Our findings provide new insights relevant to the response of marsh systems to storms, and highlight the importance of the gradual and adequately wide sea‐to‐land gradient in delivering marsh resistance to extreme events.

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Impact of Typhoon Chan-hom on sediment dynamics and morphological changes on the East China Sea inner shelf

Cited by 31 publications

References 78 publications

Downcoast Redistribution of Changjiang Diluted Water due to Typhoon Chan-Hom (2015)

Downcoast Redistribution of Changjiang Diluted Water due to Typhoon Chan-Hom (2015)

Suspended sediment dynamics in macrotidal turbid Hangzhou Bay during Typhoon Chan-hom

Response of a patchy intertidal mudflat‐marsh transition zone to a typhoon

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