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本文数值模拟了东至对马岛、九州和琉球群岛,南至台湾海峡中部的东海东部和南部海区的全日和半日潮流,给出了潮流的分布,所得结果与观测值符合良好。计算表明,冲绳海槽附近剧烈的水深变化能引起计算的不稳定,但足够大的侧向涡动粘性可以消除这种不稳定性。所得结果表明,大部海区潮流为右旋,在朝鲜海峡南部和冲绳岛西面各有一个M_2圆流点。根据海中观测和计算所得的潮流和沿岸潮汐观测值,还给出了东海K_1和M_2潮汐同潮图。
This paper numerically simulates the full-time and half-day tidal currents in the eastern and southern East China Sea to the islands of the Falklands, Kyushu and Ryukyu Islands, the central part of the Taiwan Strait to the south of the Taiwan Strait, and gives the distribution of power flow. The obtained results are in good agreement with the observed values. Calculations show that the drastic water depth changes near the Okinawa Trough can cause computational instability, but sufficient lateral eddy viscosity can eliminate this instability. The results show that the tidal currents in most of the sea areas are right-handed and have an M_2 circular flow point in the south of the Korean Strait and west of Okinawa. Based on tidal currents observed and calculated in the sea and tidal observations along the coast, the tidal atlas of K_1 and M_2 in the East China Sea are also given.