RV Investigator Voyage IN2018_V02 CTD Data

This record describes the Conductivity-Temperature-Depth (CTD) data collected from the Marine National Facility RV Investigator voyage IN2018_V02, titled: "SOTS: Southern Ocean Time Series automated moorings for climate and carbon cycle studies south west Tasmania; Subantarctic Biogeochemistry of Carbon and Iron." The voyage took place between March 3 and March 21, 2018 departing from Hobart (TAS) and arriving in Hobart.Data for 7 deployments were acquired using the Seabird SBE911 CTD unit 24, fitted with 36 twelve litre bottles on the rosette sampler. Samples were collected on casts 2-6. 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 for each deployment was calculated using the sensors with the lowest residuals when compared with the values measured by the hydrochemistry team. The final calibration from chosen sensors all had a standard deviation (S.D) less than our target of ‘better than 0.002 PSU’. The standard product of 1dbar binned averaged were produced using data from the primary conductivity and temperature sensors and the secondary oxygen sensor.The dissolved oxygen data calibration generally showed a good agreement between the CTD and bottle data.A Biospherical photosynthetically active radiation (PAR), Wetlabs transmissometer, Chelsea fluorometer and the Wetlabs ECO chlorophyll and Eco-scattering sensors were also installed on the auxiliary A/D channels of the CTD. An IMU and LADCP unit was also attached to the rosette for all casts.The collected data were subsequently processed and archived within the CSIRO Oceans and Atmosphere (O&A) Information and Data Centre (IDC) in Hobart. Additional information regarding this dataset may be contained in the Voyage Summary and the CTD Data Processing Report.

本记录描述了澳大利亚国家海洋设施（Marine National Facility）“调查者号”（RV Investigator）IN2018_V02航次采集的温盐深（Conductivity-Temperature-Depth，CTD）数据，该航次标题为："SOTS（Southern Ocean Time Series，南大洋时间序列）：塔斯马尼亚西南部气候与碳循环研究的自动锚系观测；亚南极碳与铁的生物地球化学研究。"该航次于2018年3月3日至3月21日进行，从塔斯马尼亚州（TAS）霍巴特出发并返回霍巴特。7次布放的数据通过Seabird SBE911型CTD设备（编号24）采集，该设备搭载于多瓶采水器（rosette sampler）上，配备36个12升采水瓶；样品采集自第2至6次水文投测。压力值与初始电导率值采用Sea-Bird提供的校准系数计算；温度数据采用澳大利亚联邦科学与工业研究组织（CSIRO）提供的校准方法校正。数据经过自动化质量控制（QC）处理，去除尖峰噪声与超出范围的值。每次布放的最终电导率校准通过选择与水化学团队测量值残差最小的传感器计算得出，所选传感器的最终校准结果标准偏差（S.D）均低于“优于0.002实用盐度单位（PSU）”的目标值。标准产品为1分巴区间平均数据，由主电导率、主温度传感器及辅助氧传感器的数据生成。溶解氧数据校准结果显示，CTD测量值与采水瓶样品测量值总体一致性良好。CTD的辅助模数转换（A/D）通道还安装了Biospherical光合有效辐射（PAR）传感器、Wetlabs透射仪、Chelsea荧光仪以及Wetlabs ECO系列叶绿素传感器与散射传感器；所有水文投测中，多瓶采水器上均搭载惯性测量单元（IMU）与下降式声学多普勒流速剖面仪（LADCP）设备。采集的数据随后在霍巴特的CSIRO海洋与大气研究所（O&A）信息与数据中心（IDC）完成处理与存档。关于本数据集的更多信息可参见航次总结报告与CTD数据处理报告。