RV Investigator Voyage IN2024_V01 CTD Data

This record describes the Conductivity-Temperature-Depth (CTD) data collected from the Marine National Facility RV Investigator voyage IN2024_V01, titled: "Multidisciplinary Investigations of the Southern Ocean (MISO): Linking Physics, Biochemistry, Plankton, Aerosols, Clouds, And Climate." The voyage took place between January 2 and March 5, 2024 departing from Hobart (TAS) and returning to Freemantle (WA)

Data for 103 CTD deployments were acquired using the Sea-Bird SBE9+V2 CTD unit #24 (S/N 1354), fitted with 36 twelve-litre bottles on the rosette sampler. Sea-Bird-supplied calibration factors were used to compute the pressures and preliminary conductivity values. CSIRO-supplied calibrations were applied to the temperature data. The data were subjected to automated QC to remove spikes and out-of-range values.

The final conductivity calibration was based on a single deployment grouping. The final calibration from the primary sensor had a standard deviation (SD) of 0.0012679 PSU, within our target of ‘better than 0.002 PSU’. The standard product of 1-decibar binned averages were produced using data from the primary sensors.

The dissolved oxygen data (primary) calibration fit had a SD of 0.94146 (Casts: 1-52) and 0.94773 (Casts: 53-103) μM. The agreement between the CTD and bottle data was good. Additional sensors include: Altimeter (Tritech PA500), Transmissometer (Wetlabs C-Star ), CDOM,
Chlorophyll-a, Scattering (Wetlabs ECO FLCDRTD) were installed on the auxiliary A/D channels of the CTD.

The collected data were subsequently processed (quality-controlled), and archived by the CSIRO National Collections and Marine Infrastructure (NCMI) Information and Data Centre (IDC). Additional information regarding this dataset may be contained in the Voyage Summary and the CTD Data Processing Report.

本记录描述了从澳大利亚海洋国家设施（Marine National Facility）研究船RV Investigator号航次IN2024_V01采集的温盐深仪（Conductivity-Temperature-Depth, CTD）数据，该航次标题为“南大洋多学科调查（MISO）：连接物理、生物化学、浮游生物、气溶胶、云与气候”。本次航次于2024年1月2日至3月5日开展，从霍巴特（塔斯马尼亚州）出发，最终返回弗里曼特尔（西澳大利亚州）。

本次共完成103次CTD投放作业，数据由Sea-Bird SBE9+V2型24号CTD设备（序列号1354）采集，该设备的采水器架搭载了36个12升容积的采水瓶。采用Sea-Bird提供的校准因子计算压力与初始电导率值，温度数据则应用了澳大利亚联邦科学与工业研究组织（CSIRO）提供的校准方案。随后对所有数据执行自动化质量控制（QC），以剔除尖峰数据与超限值。

最终电导率校准基于单一投放分组完成。主传感器的最终校准标准差（SD）为0.0012679 实用盐度单位（PSU），符合我们“优于0.002 PSU”的校准目标。利用主传感器数据生成了1分巴（decibar）分箱平均的标准产品数据集。

主传感器溶解氧数据的校准拟合标准差分别为0.94146 μM（第1-52次投放）与0.94773 μM（第53-103次投放）。CTD数据与采水瓶实测数据的一致性良好。本次搭载的额外传感器包括：Tritech PA500型高度计、Wetlabs C-Star型透射仪、有色溶解有机物（CDOM）传感器、叶绿素a传感器、Wetlabs ECO FLCDRTD型散射仪，上述传感器均接入CTD的辅助模数转换（A/D）通道。

采集得到的数据后续经过处理（质量控制），并由澳大利亚联邦科学与工业研究组织（CSIRO）国家海洋数据与基础设施（National Collections and Marine Infrastructure, NCMI）信息与数据中心（Information and Data Centre, IDC）完成归档。有关本数据集的更多详细信息可参阅《航次概要》与《CTD数据处理报告》。