RV Investigator Voyage IN2019_T01 CTD Data

This record describes the Conductivity-Temperature-Depth (CTD) data collected from the Marine National Facility RV Investigator voyage IN2019_T01, titled: "Collaborative Australian Postgraduate Sea Training Alliance (CAPSTAN)". The voyage took place from Hobart (TAS) to Freemantle (WA) between April 29 and May 9, 2019.Data for 5 deployments were acquired using the Sea-Bird SBE911 CTD 23, 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 secondary sensor had a standard deviation (SD) of 0.0021299 PSU, outside our target of ‘better than 0.002 PSU’. The standard product of 1 decibar binned averaged were produced using data from the secondary sensors.The dissolved oxygen data calibration fit had a SD of 0.87858 µM. The agreement between the CTD and bottle data was good.Biospherical PAR, Tritech Altimeter (100m), Transmissometer, ECO-Chlorophyll and ECO-Scattering sensors were also installed on the auxiliary A/D channels of the CTD.

本记录描述了从澳大利亚国家海洋设施‘调查者号’（RV Investigator）航次IN2019_T01中采集的电导率-温度-深度（Conductivity-Temperature-Depth, CTD）数据，该航次主题为‘澳大利亚研究生海洋培训联合联盟（Collaborative Australian Postgraduate Sea Training Alliance, CAPSTAN）’。本航次于2019年4月29日至5月9日期间执行，航行路线为塔斯马尼亚州霍巴特至西澳大利亚州弗里曼特尔。本次航次共完成5次布放作业，所用观测设备为Sea-Bird SBE911型CTD 23，其采水器阵列搭载36个12升采水瓶。数据处理中，采用Sea-Bird官方提供的校准系数计算压力值与初始电导率数值，温度数据则应用了澳大利亚联邦科学与工业研究组织（Commonwealth Scientific and Industrial Research Organisation, CSIRO）提供的校准方案。所有数据已通过自动化质量控制流程，以剔除异常尖峰与超出量程的无效数值。最终电导率校准基于单次布放分组开展，次级传感器的最终校准标准差（Standard Deviation, SD）为0.0021299 PSU，未达到预设的‘优于0.002 PSU’目标阈值。基于次级传感器的观测数据，生成了1分巴（decibar）分箱平均的标准产品。溶解氧数据的校准拟合标准差（SD）为0.87858 µM，CTD实测数据与采水瓶实验室分析数据的吻合度良好。此外，CTD的辅助模数转换（Analog-to-Digital, A/D）通道还搭载了以下辅助传感器：Biospherical公司光合有效辐射（Photosynthetically Active Radiation, PAR）传感器、Tritech公司100米量程高度计、透射率计、ECO叶绿素传感器以及ECO散射传感器。