Hydrodynamic condition and suspended sediment diffusion in the Yellow Sea and East China Sea

Guangxue Li, Lulu Qiao, Ping Dong, Yanyan Ma, Jishang Xu, Shidong Liu, Yong Liu, Jianchao Li, Pin Li, Dong Ding, Nan Wang, Dada Olusegun A, Ling Liu

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Abstract

Based on monthly averaged current, temperature, and salinity, we analyzed the changes of suspended sediment concentration (SSC) and the relationship with the warm current, coastal current, and cold water mass (CWM) in the East China Seas (ECSs). The result shows that the coastal current and surface diluted water are the route for transporting suspended sediment. The Kuroshio and its derived warm current branches play the important role of the continental shelf circulation system and control the diffusion of suspended sediment. High SSC has been mainly concentrated in coastal current and CWM. Two sedimentary dynamic patterns have been identified. The winter-half-year pattern lasts almost 7 months. The coastal currents off the Shandong Peninsula, northern Jiangsu, Zhejiang-Fujian coast are the main routes for diffusion and deposition of the suspended sediment from the Yellow River and Changjiang River. The summer-half-year pattern is characterized by the well-developed CWM. All CWMs have a unique function to trap suspended sediment under the thermocline due to weakening tidal current and residual current there. These CWMs in the Yellow Sea (YS) and north ECS are connected together. The layer above the thermocline is characterized by diluted water with low salinity, high temperature. Suspended sediment can be transported into the Okinawa Trough and the South Korea coast during this period. A strong eddy always occur nearby the Kuroshio bend at northeast Taiwan, which has promoted the exchange between the ECS shelf and Okinawa Trough, and the development of the shelf edge current and Taiwan warm current (TWC).

Original languageEnglish
Pages (from-to)6204-6222
Number of pages19
JournalJournal of Geophysical Research: Oceans
Volume121
Issue number8
Early online date6 Aug 2016
DOIs
Publication statusPublished - 20 Aug 2016

Keywords

  • Coastal current
  • Cold water mass
  • East China Sea
  • Suspended sediment diffusion
  • Warm current
  • Yellow Sea

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    Li, G., Qiao, L., Dong, P., Ma, Y., Xu, J., Liu, S., Liu, Y., Li, J., Li, P., Ding, D., Wang, N., Olusegun A, D., & Liu, L. (2016). Hydrodynamic condition and suspended sediment diffusion in the Yellow Sea and East China Sea. Journal of Geophysical Research: Oceans , 121(8), 6204-6222. https://doi.org/10.1002/2015JC011442