RV Investigator Voyage IN2019_V02 Triaxus (undulating CTD) Data

This record describes the data (CTD, Dissolved Oxygen, Transmissometer, PAR, ECO Triplet, Nitrate, Fluorescence and LOPC) collected using the towed TRIAXUS platform on Investigator voyage IN2019_V02, titled: "SOTS: Southern Ocean Time Series automated moorings for climate and carbon cycle studies southwest of Tasmania; Subantarctic Biogeochemistry of Carbon and Iron, Southern Ocean Time Series Site". The voyage took place from Hobart (TAS) to Hobart (TAS) between 14th March to 4th April, 2019.

Data for 3 Triaxus deployments were acquired in CAP CTD acquisition software using the Seabird SBE911 CTD 20. The deployments were conducted with a standard tow speed of between 7 to 9 knots and wire out ranged from 1050 to 1210 m.

During the first two deployments, we encountered issues with the Transmissometer and biofouling of sensors. On the second deployment a communications issue was also addressed.

Sea-Bird-supplied calibration factors and CSIRO supplied calibrations were used to compute the pressures, conductivity and temperature data. The data were subjected to automated QC to remove spikes and out-of-range values.

Dissolved oxygen sensors, Transmissometer and Cosine Photosynthetically Active Radiation (PAR) sensor were also installed on the auxiliary A/D channels of the CTD. In addition to the auxiliary channels, ECO Triplet, Nitrate, FIRe and LOPC were mounted on the Triaxus as attached payloads.

The standard data product (1 decibar/10 second binned averaged) was produced using data from the secondary sensors to produce an along-track time-series dataset for each CAP scan files. These scan files were grouped into legs, each containing a section of the Triaxus deployment and in each leg, vertical casts were created with interpolated values from the along-track time-series binned dataset with a maximum interpolation distance of 3 casts. These generated the along-track and vertical cast section data products for each Triaxus deployment

Additional information regarding this dataset may be contained in the Voyage Summary and the Data Processing Report.

本记录描述了在"调查者"号（Investigator）科考航次IN2019_V02期间，使用拖曳式TRIAXUS平台采集的多类观测数据，涵盖CTD、溶解氧（Dissolved Oxygen）、透射仪（Transmissometer）、光合有效辐射（PAR，Photosynthetically Active Radiation）、ECO三联传感器（ECO Triplet）、硝酸盐（Nitrate）、荧光仪（Fluorescence）以及LOPC。本航次的研究主题为："SOTS：塔斯马尼亚西南部用于气候与碳循环研究的南大洋时间序列自动锚系系统；南大洋时间序列站点的亚南极碳与铁生物地球化学研究"。本次航次于2019年3月14日至4月4日期间开展，往返于塔斯马尼亚州霍巴特港（Hobart (TAS)）。

本次共完成3次TRIAXUS平台布放，所有数据均通过Seabird SBE911 CTD 20型设备，依托CAP CTD采集软件获取。布放作业采用7至9节的标准拖曳航速，下放钢缆长度介于1050米至1210米之间。

前两次布放过程中，出现了透射仪故障与传感器生物附着的问题；第二次布放期间还同步解决了通信故障。

本数据集采用Sea-Bird提供的校准系数与澳大利亚联邦科学与工业研究组织（CSIRO）提供的校准参数，对压力、电导率与温度数据进行计算。所有数据均经过自动化质量控制流程，以剔除异常尖峰与超限值。

溶解氧传感器、透射仪与余弦式光合有效辐射（PAR，Photosynthetically Active Radiation）传感器均安装于CTD的辅助A/D通道。除上述辅助通道搭载的设备外，ECO三联传感器（ECO Triplet）、硝酸盐（Nitrate）、FIRe传感器以及LOPC均作为附加载荷搭载于TRIAXUS平台。

标准数据产品以1分巴/10秒的间隔进行分箱平均处理，基于二次传感器数据生成每个CAP扫描文件的沿航迹时间序列数据集。这些扫描文件被按航段分组，每个航段对应一段TRIAXUS布放任务；每个航段内，通过对沿航迹时间序列分箱数据集进行插值生成垂直剖面数据，最大插值跨度为3个剖面，最终为每次TRIAXUS布放生成沿航迹与垂直剖面两类数据产品。

本数据集的补充信息可参见航次总结报告与数据处理报告。