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二十多年来,海洋工作者为研究海洋非周期性水位变化形成的机制和预报方法,大都采用验潮站记录的实际潮位减去预报潮位的差值(以下简称水位余差)作为基本的数据样本加以研究。这是建立在天文潮预报是准确的这一基础之上的。我国一直采用调和分析方法预报潮汐,一般来讲尚能满足生产的需要。但在象河口的某些区域,预报效果就差一些。而且正如W.H.Munk和D.E.Cartwright所指出的,在调和分析方法中,每个分潮具有线谱的
For more than two decades, for the study of the mechanisms and forecasting methods of ocean aperiodic water level changes, marine workers mostly use the actual tide recorded by tide gauges minus the difference between predicted tidal levels (hereinafter referred to as water level margin) as the basic Data samples to be studied. This is based on the astronomical forecast is accurate. Our country has always adopted the method of harmonic analysis to predict the tides. Generally speaking, we can still meet the needs of production. However, in some areas like the mouth of the river, the prediction effect is worse. And as pointed out by W.H. Munk and D.E. Cartwright, in the harmonic analysis method, each tide has a line spectrum