潜标CTD的现场温盐比测方法研究  

Research on the Field Comparative Measuring Method of CTD on Subsurface Buoy

作　　者：陈钊 魏传杰[1,2] 刁新源 陈磊[1,2] 孙毅 赵张南[1,2] 潘俊[1,2] CHEN Zhao;WEI Chuan-jie;DIAO Xin-yuan;CHEN Lei;SUN Yi;ZHAO Zhang-nan;PAN Jun(Institute of Oceanography,Chinese Academy of Sciences,Qingdao 266071,China;Center for Ocean Mega-Sciences,Chinese Academy of Sciences,Qingdao 266061,China)

机构地区：[1]中国科学院海洋研究所,山东青岛266071 [2]中国科学院海洋大科学研究中心,山东青岛266071

出　　处：《海洋技术学报》2021年第2期39-44,共6页Journal of Ocean Technology

基　　金：国家自然科学基金资助项目(41806164)。

摘　　要：潜标温盐深剖面测量仪(CTD)在长期使用后仪器数据会发生漂移、准确度降低,对科学研究的正确性和可信性造成严重影响。本文依据船载CTD的作业内容,为SBE37潜标CTD设计了一种用于比测的CTD底托架,将大洋水体视为恒温槽,以SBE911船载CTD为比测标准,通过回归方法计算了潜标CTD的温盐传感器校准系数,并将该系数下获取的数据与未校准的数据进行比较。温度比测误差绝对值的均值为3.833 3×10^(-4)℃,原始误差绝对值的均值为5.500 0×10^(-4)℃,电导率比测误差绝对值的均值为2.166 7×10^(-4) S/m,原始误差绝对值的均值为2.333 3×10^(-4) S/m,以上结果证明,本文中设计的比测方法对提高潜标CTD准确性有一定作用。After long-term use of CTD on subsurface buoy,the data will drift,and its accuracy will decrease,which will adversely affect the correctness and credibility of scientific research.According to the operation of shipboard CTD,a bottom bracket is designed for subsurface buoy CTD comparing measurement.The ocean water is regarded as a thermostat,SBE911 CTD as the standard measurement.The calibration coefficient of subsurface buoy CTD temperature and salinity sensors are calculated by regression method,and data obtained by new coefficient are compared with uncalibrated one.The mean of the absolute value of the temperature comparing error is 3.8333×10^(-4)℃,original error is 5.5000×10^(-4)℃,while the mean of the absolute value of the conductivity comparing error is 2.1667×10^(-4)S/m,original error is 2.3333×10^(-4) S/m.The results prove that the comparing measurement method designed in this paper has an effect on improving the accuracy of the subsurface buoy CTD.

关 键 词：潜标CTD 船载CTD 回归分析 

分 类 号：P716[天文地球—海洋科学]