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一、前言非潮汐性质水位变化的研究历来是地球物理学中的一个重要课题.近年来越来越多的海洋工作者把水位变化和海洋水文甚至气象状况结合起来进行研究,得到许多有意义的结果.有关情况在文献中曾作过简短的评述.当研究涉及到水位资料时,当然最好是直接采用通常以1小时为间隔取样的原始潮位记录.然而如果所关心的仅仅是周期在数天以上的低频变化时,则直接采用原始记录会引进过多的数据处理工作.为避免这一点,人们常常直接利用日均海面、月均海面甚
I. INTRODUCTION The research on the change of non-tidal water level has always been an important issue in geophysics.In recent years, more and more oceanographers have studied the changes of water level and ocean hydrology and even meteorological conditions, and obtained many meaningful As a result, a brief review of the situation has been made in the literature.When the study deals with water level data, it is, of course, best to directly record the raw tide level, which is usually sampled at 1-hour intervals.If, however, When the low frequency changes above the sky, the direct use of raw records will introduce excessive data processing work. To avoid this, people often make direct use of the average daily sea level,