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在文献[1]中,采用波包的观点给出了确定内波包的方向和群速的方法。本文基于1984年7月在L_3站所作的87.5小时的观测资料,研究了内波包的结构。结果表明,沿单一方向传播的潮成内波包是不连续的,存在四个波包,其间间以三个噪声区。四个波包的平均传播方向和速度相应为-90°和50cm/s。波包的频率特征与等温线及上、下层平均流的变差流的频谱特性相一致。通过模式对比证明,我们的二层模式与孤立子理论的二层模式的物理意义完全一致,即两者都反映出,在沿波传播的方向上,潮成内波的切变效应与其波幅成正比,不过我们的模式更为适用。
In [1], the method of determining the direction and group velocity of the inner wave packet is given from the point of view of the wave packet. Based on the observation data of 87.5 hours made at L_3 station in July 1984, the structure of the internal wave packet is studied. The results show that tidal wave packages propagating in a single direction are discontinuous, and there are four wave packages with three noise zones in between. The average propagation direction and velocity of the four wave packets correspond to -90 ° and 50 cm / s, respectively. The frequency characteristics of the wave packet are consistent with those of the isotherms and the variances of the upper and lower average currents. The comparison of mode shows that the physical meaning of the two-layer model of soliton theory is exactly the same as that of the two-layer model of soliton theory. That is to say, both of them show that the shear effect of the internal wave and its amplitude Proportional, but our model is more applicable.