引 言 分析研究海水温度日变化的特点,对海况分析及了解海区水文基本特征具有重要的意义,特别是对水温日变化很显著的浅海区域更为重要.此外,从渔业意义上来看,了解水温日变化对鱼类昼夜分布和移动规律的影响亦极其重要。 目前的海洋调查,仍以单船进行大面或断面定点观测为主,这样就必须考虑到由于逐站的观测日期和时间的不同所产生的误差。在深海和大洋中,由于水温年变化和日变化均 Introduction Analysis of the diurnal variation of seawater temperature is of great significance to the analysis of the sea state and the understanding of the basic hydrological features of the sea area, especially for the shallow sea areas where the diurnal variation of water temperature is significant. In addition, from the fishery point of view, The effect of changes on the diurnal distribution and movement of fish is also extremely important. The current marine survey is still dominated by single-ship large-area or cross-sectional fixed-point observations, thus taking into account errors due to differences in the dates and times of observations by stations. In the deep ocean and the oceans, both annual and diurnal variations in water temperature are