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根据湾顶Konorihama站和湾外Enoshima站1972年5月至1973年5月1a的观测资料研究了女川湾(OnagawaBay)的假潮特征。在Konorihama站经常出现7~11cm全振幅假期(占总样本的63%),最大达31cm.短时间资料谱分析指出,谱峰值周期明显地随时间而变化。位于湾嘴的波节线离岸移动,而在Enoshima站却向岸移动。造成这些现象的原因似乎是由于引起假潮的外海波入射角的改变。假潮的基波和横向波型的振幅随时间增加或减小交替变化,被认为是这些波型之间能量的转换。能够观测到由气压波引起的湾振荡,但振荡振幅仅在几厘米之内,而且在几小时内耗散。
Based on the observations from the Konorihama Station on the Bay and the Enoshima Station on the Bay from May 1972 to May 1a, 1973, 1a the characteristics of the Habits on the Onagawa Bay were studied. Frequencies of 7 ~ 11cm full amplitude (63% of the total sample) often occur at Konorihama Station up to 31cm. Short-term data analysis indicates that the peak period of the spectrum changes significantly over time. The nodal line at the mouth of the bay moves offshore while at the island of Enoshima it moves to the shore. The reason for these phenomena appears to be due to changes in the incident angle of the outer sea waves that cause the clutter. The amplitudes of the fundamental wave and the transverse wave pattern of the tide wave increase or decrease alternately with time, which is considered as the energy conversion between these wave patterns. Bay oscillations caused by barometric pressure waves can be observed but the oscillation amplitude is only a few centimeters and dissipates within a few hours.