苏北浅滩辐射沙洲高低潮时误差特征分析及成因探讨

Research on high & low tide time error characteristics in the radial sand ridges area in North Jiangsu Province

根据地处苏北浅滩辐射沙洲的洋口港海洋站2011年1月至2013年12月共3年的验潮资料,计算了高低潮时实况与对应的天文潮高低潮时的误差,分析误差的月际分布、提前或滞后量分布等特征,并对引起高低潮时误差的原因进行了初步探讨。分析表明:苏北浅滩辐射沙洲高低潮时误差具有明显的月际分布,且呈准正态分布;受天气系统影响时,辐射沙洲高低潮时误差最高可超过1 h,需要引起海洋环境预警报和涉海作业等人员的足够重视。

Based on the real tide data from the ocean stations of the Yangkou Port in North Jiangsu Province from Jan. 2011 to Dec. 2013, this paper calculates the error characteristics of high low tide, including error＇s monthly distribution, ahead and delay time between real tide and astronomical tide. The causes of high low tide errors are also preliminarily discussed.The analysis indicates that the error＇s monthly distribution is obvious, and accords with the quasi-normal distribution.Affected by weather systems such as tropical cyclone, the maximum of ahead or delay time of high low tide errors could exceed 1 hour, to which enough attention should be paid.