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Observations of internal undular bores on the Japan/East Sea shelf-coastal region

机译：日本/东海陆架-沿海地区的内部不规则孔的观测

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摘要

Observations are presented of internal undular bores (IUBs) on the Japan/East Sea coast. We found three types of IUB amplitude modulation functions. The first type (IUB1) has a leading edge, which is formed by the soliton with maximal amplitude. The second type (IUB2) has a soliton with maximal amplitude (SMA) located between the leading and trailing edges. The third type (IUB3) consists of 2-3 solitons, which have identical amplitudes. The evolution of the IUB2 from the moment of generation to the moment of maximal development was analyzed. The speed of the IUB2 approached to the phase speed of linear internal waves with a period of 12.4 h. The amplitude modulation function of the IUB2 is believed to be unique in ocean observations. Observations are discussed in the context of recently raised hypotheses concerning the evolution of IUBs in the coastal environment.
机译：观测结果显示了日本/东海沿岸的内部浅孔（IUB）。我们发现了三种类型的IUB调幅函数。第一种类型（IUB1）具有前沿，该前沿由具有最大振幅的孤子形成。第二种类型（IUB2）具有位于前缘和后缘之间的具有最大振幅（SMA）的孤子。第三类（IUB3）由2-3个孤子组成，其振幅相同。分析了IUB2从生成时刻到最大发展时刻的演变。 IUB2的速度接近线性内部波的相速度，周期为12.4 h。 IUB2的振幅调制功能被认为在海洋观测中是独一无二的。在最近提出的关于IUB在沿海环境中的演变的假说的背景下讨论了观察结果。

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