吕宋海峡潜标深度周期性改变初步分析

Preliminary Analysis on the Periodic Change of Submerged Buoy Depth Near the Luzon Strait

由于在吕宋海峡多次出现深潜器"掉深"的现象,通过分析位于吕宋海峡处3个潜标数据,并利用谱分析的方法,分析了主浮体深度掉深的频率,利用WOA13数据,分析了潜标深度改变的原因,得出吕宋海峡内潜标深度的改变与潮汐密切相关,具有日周期和半月周期;潜标掉深具有季节变化特征,冬季、春季掉深最大,夏季其次,秋季最小;海峡内不同位置潜标掉深也不相同,其掉深情况与密度梯度的大小有关。

To investigate the incident that the depth of submersible rapidly increases in the Luzon Strait, this paper analyzes the depth change characteristics of the three submerged buoys in the Luzon Strait, and uses the spectral analysis method to analyze the frequency of depth change of the main floating body. By utilizing the data of WOA13, this paper investigates the reason of depth change. It is concluded that the depth change of submerged buoys has a close correlation with the tides in the Luzon Strait, and shows a daily and half monthly period. Furthermore, the amplitude of depth change has the feature of seasonal variation. Winter and spring witness the maximum depth change, followed by summer, and autumn sees the minimum. In addition, different amplitudes of depth change occur in different locations in the Luzon Strait, which has close correlation with local density gradient.