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通过用压力计和从波谱中确定卓越周期,在日本纪伊半岛观测28个海湾的水面波动。波谱用汉宁窗口6小时中抽取一分钟样本的时间序列获得。比较1944年东南海海啸和1960年智利海啸在海湾顶部对应最大波高的卓越周期,我们确定海啸的高度取决于卓越周期。而且,海啸的高度比定义为海湾顶部最大海啸波高与开阔海面波高的比值,被绘制作为卓越周期的功能。它们出现最大值的时间在1944年东南海海啸和1960年智利海啸分别为12~25min和31~60min,这被归因于海湾共振。在共振时期内,1944年和1960年海啸的高度比分别为2和4,于是得出卓越周期作为基础数据对于预测海湾海啸放大有积极作用。
By using pressure gauges and determining excellent cycles from the spectrum, surface fluctuations in 28 bays were observed in the Kii Peninsula in Japan. The spectrum was obtained by taking a one-minute sample of the time series from the 6-hour window of Hanning. Comparing the remarkable cycles of the 1944 tsunami in the Southeast and the Chilean tsunami in 1960 at the top of the Gulf corresponding to the maximum wave height, we determined that the height of the tsunami depended on the excellent cycle. Moreover, the tsunami height ratio, defined as the ratio of the maximum tsunami wave height to the open ocean wave height at the top of the bay, is plotted as a function of the superior cycle. The maximum of them occurred in 1944 when the tsunami in the southeast sea and the tsunami in 1960 in Chile were 12 ~ 25min and 31 ~ 60min respectively, which was attributed to the Gulf Resonance. During the resonance period, the height ratios of the tsunami in 1944 and 1960 were 2 and 4, respectively. Therefore, obtaining the excellent period as the basic data has a positive effect on the prediction of the enlargement of the Gulf Tsunami.