Abstract
The marine dynamic environment of the Bohai Sea and the Yellow Sea in the winter of 2006 is simulated by the Regional Ocean Modelling System (ROMS) marine numerical model. Using the simulated temperature and salinity, the water exchange zone between the Bohai Sea and Yellow Sea is defined through the Spectral Mixture Model (SMM). The influence of winter gales on the water exchange is also discussed. It is found that the Yellow Sea water masses in winter are distributed in a “tongue” shape in the Bohai Strait region, the water exchange zone presents a zonal distribution along the margin of the “tongue”, with a tendency of running from northwest to southeast, and the water exchange is intensified at the tip of the “tongue”. Besides, the coastal area in the northernmost Yellow Sea does not participate in the water exchange between the Bohai Sea and Yellow Sea. The result shows that the winter gale events play a role in enhancing the water exchange. It is specifically shown by the facts: the Yellow Sea warm current is enhanced to intrude the Bohai Sea by the gale process; the water exchange zone extends into the Bohai Sea; the water exchange belt in the southern part becomes wider; the mixture zone of river runoff with the Bohai Sea water upon its entry is enlarged and shifts northwards. Within two days after the gale process, the exchange zone retreats toward the Yellow Sea and the exchange zone resulted from the Huanghe River (Yellow River) runoff also shrinks back shoreward.
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Foundation item: The National Natural Science Foundation of China under contract Nos 41206013, 41376014, 41430963 and 41106004; the Key Marine Science Foundation of the State Oceanic Administration of China for Young Scholar under contract Nos 2012202, 2013203 and 2012223; the Public Science and Technology Research Funds Projects of Ocean under contract No. 201205018; the National Science and Technology Support Program under contract No. 2014BAB12B02; the Tianjin Science and Technology Support Program under contract No. 14ZCZDSF00012.
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Song, J., Guo, J., Li, J. et al. Definition of water exchange zone between the Bohai Sea and Yellow Sea and the effect of winter gale on it. Acta Oceanol. Sin. 36, 17–25 (2017). https://doi.org/10.1007/s13131-017-0989-z
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DOI: https://doi.org/10.1007/s13131-017-0989-z