Physical oceanography (CTD) during METEOR cruise M148

Seabird 911plus systems equipped with dual temperature-conductivity-oxygen sensors were employed. All systems had a 24-bottle water sampling rosette with 10 l Niskin bottles. Water sampling, processing, and calibration followed GO-SHIP recommendations (Swift, 2010; McTaggart et al., 2010; Uchida et al., 2010) and included the recommended steps Data Conversion, Sensor Time-Alignment, Creation of Bottle Files, Outlier Removal, Pressure Sensor Filtering, Conductivity Cell Thermal Mass Correction, Ship Roll Correction and Deck Offset Correction by Loop Editing, as well as Derivation of Calculated Properties. After these steps, conductivity and oxygen readings were calibrated against values determined with salinometry and Winkler titration , respectively. Finally, the downcast data was averaged over 1 dbar wide intervals. An independent upcast calibration was used to obtain calibrated CTDO values coincident with the discrete water samples.

配备双温度-电导率-氧传感器的Seabird 911plus系统被用于本研究。所有系统均搭载24瓶采水花环，配备10升Niskin瓶。水样采集、处理与校准遵循GO-SHIP推荐规范（Swift, 2010；McTaggart等, 2010；Uchida等, 2010），涵盖了推荐的步骤：数据转换（Data Conversion）、传感器时间对齐（Sensor Time-Alignment）、瓶文件创建（Creation of Bottle Files）、异常值去除（Outlier Removal）、压力传感器滤波（Pressure Sensor Filtering）、电导池热质量校正（Conductivity Cell Thermal Mass Correction）、船体横摇校正（Ship Roll Correction）、基于循环编辑的甲板偏移校正（Deck Offset Correction by Loop Editing），以及计算属性推导（Derivation of Calculated Properties）。完成上述步骤后，电导率与氧读数分别通过盐度测定法和温克勒滴定法（Winkler titration）测定的值进行校准。最后，下潜数据在1分巴宽的区间内取平均值。通过独立的上升校准获取与离散水样一致的校准CTDO值。