基于南极科考数据的ADCP深度订正实验

The Experiment for ADCP Depth Correction Based on Antarctic Expedition Data

声学多普勒流速剖面仪由于其结构、原理及观测环境等因素,其流速观测结果与海水实际深度的匹配存在较大偏差。采用第31次南极科考实测ADCP及XCTD数据,通过计算实际声速,对ADCP层深计算公式进行了订正实验,使流速观测数据与其所对应的实际深度重新匹配。结果显示,深度订正值随深度的增加而增大,至700m处,最大订正值可达16m。相应的流速和流向也随深度的订正有大幅度的改变,而且,无论是深度还是流速和流向,其订正值均由低纬向高纬,逐渐增大。

There is a big deviation between the velocity measurement results and the actual water depth because of Acoustic Doppler Current Profilers,structure,principle,observation environment and other factors.In this paper,the thirty-first Antarctic expedition measured ADCP and XCTD data are used to correct the ADCP depth calculation fomula by calculating actual sound velocity,so that the velocity measured data and its corresponding actual depth can be matched.The results show that the depth correction values increase with the depth,and the maximum correction value can reach 16m at 700m.The corresponding velocity and direction also vary greatly with the depth.Moreover,the depth,velocity,direction,and the correction value gradually increase from low latitude to high latitude.