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Ang Li, Xueming Zhu, Yunfei Zhang, Shihe Ren, Miaoyin Zhang, Ziqing Zu, Hui Wang. Recent improvements to the physical model of the Bohai Sea, the Yellow Sea and the East China Sea Operational Oceanography Forecasting System[J]. Acta Oceanologica Sinica. doi: 10.1007/s13131-021-1840-0
Citation: Ang Li, Xueming Zhu, Yunfei Zhang, Shihe Ren, Miaoyin Zhang, Ziqing Zu, Hui Wang. Recent improvements to the physical model of the Bohai Sea, the Yellow Sea and the East China Sea Operational Oceanography Forecasting System[J]. Acta Oceanologica Sinica. doi: 10.1007/s13131-021-1840-0

Recent improvements to the physical model of the Bohai Sea, the Yellow Sea and the East China Sea Operational Oceanography Forecasting System

doi: 10.1007/s13131-021-1840-0
Funds:  The National Key Research and Development Program of China under contract No. Grant 2017YFA0604203; the National Natural Science Foundation of China under contract No.41806003.
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  • Corresponding author: E-mail: zhuxm@nmefc.cn
  • Received Date: 2020-11-01
  • Accepted Date: 2020-11-30
  • Available Online: 2021-05-12
  • In order to satisfy the increasing demand for the marine forecasting capacity, the Bohai Sea, the Yellow Sea and the East China Sea Operational Oceanography Forecasting System (BYEOFS) has been upgraded and improved to Version 2.0. Based on the Regional Ocean Modeling System (ROMS), a series of comparative experiments were conducted during the improvement process, including correcting topography, changing sea surface atmospheric forcing mode, adjusting open boundary conditions, and considering atmospheric pressure correction. (1) After the topography correction, the volume transport and meridional velocity maximum of Yellow Sea Warm Current increase obviously and the unreasonable bending of its axis around 36.1°N, 123.5°E disappears. (2) After the change of sea surface forcing mode, an effective negative feedback mechanism is formed between predicted sea surface temperature (SST) by the ocean model and sea surface radiation fluxes fields. The simulation errors of SST decreased significantly, and the annual average of root-mean-square error (RMSE) decreased by about 18%. (3) The change of the eastern lateral boundary condition of baroclinic velocity from mixed Radiation-Nudging to Clamped makes the unreasonable westward current in Tsushima Strait disappear. (4) The adding of mean sea level pressure correction option which forms the mean sea level gradient from the Bohai Sea and the Yellow Sea to the western Pacific in winter and autumn is helpful to increasing the fluctuation of SLA and outflow of the Yellow Sea when the cold high air pressure system controls the Yellow Sea area.
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