Correction of Depth Bias in Upper-Ocean Temperature and Salinity Profiling Measurements from Airborne Expendable Probes
Correction of Depth Bias in Upper-Ocean Temperature and Salinity Profiling Measurements from Airborne Expendable Probes
复制标题
机载消耗型探测器上层海洋温度和盐度剖面测量中深度偏差的校正
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
Qing Wang
中科院分区：
文献类型：
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作者：
D. Alappattu;Qing Wang
摘要在2011年的马登-朱利安振荡动力学实验中，使用NOAA的WP-3D猎户座飞机在南热带印度洋上空部署了机载一次性电导率-温度-深度（AXCTD）探头和机载一次性测深仪（AXBTs）。从AXCTD数据的初步分析，约95%的配置文件表现出双混合层结构。其中一些剖面中存在混合层是错误的，是由于AXCTD处理软件无法正确识别探针下降的起始点而引入的。这项工作揭示了这些错误在数据处理中的影响，并提出了一种客观的方法来消除这些错误的数据从配置文件使用原始音频文件的频谱。重建AXCTD/AXBT配置文件进行了比较，并与配置船载电导率-温度-深度（CTD）和消耗性深海温度计（XBT）的配置文件，并发现是在良好的协议。
AbstractDuring the Dynamics of Madden–Julian Oscillation (DYNAMO) Experiment in 2011, airborne expendable conductivity–temperature–depth (AXCTD) probes and airborne expendable bathythermographs (AXBTs) were deployed using NOAA’s WP-3D Orion aircraft over the southern tropical Indian Ocean. From initial analysis of the AXCTD data, about 95% of profiles exhibit double mixed layer structures. The presence of a mixed layer from some of these profiles were erroneous and were introduced because of the AXCTD processing software not being able to correctly identify the starting point of the probe descent. This work reveals the impact of these errors in data processing and presents an objective method to remove such erroneous data from the profiles using spectrograms from raw audio files. Reconstructed AXCTD/AXBT profiles are compared with collocated shipborne conductivity–temperature–depth (CTD) and expendable bathythermograph (XBT) profiles and are found to be in good agreement.