RV Investigator Voyage IN2023_V07 CTD Data

This record describes the CTD data collected on Investigator voyage IN2023_V07, titled: "SWOT-ACC: smaller scales of the Antarctic Circumpolar Current in a meander south of Tasmania." The voyage took place between November 15, 2023 and December 20, 2023 (AEST), departing from Hobart and returning to Hobart.The primary focus of this voyage was to enhance our ability to observe and comprehend the effects of small-scale motions (ranging from 10 to 100 km) on the dynamics of the Antarctic Circumpolar Current (ACC). The groundbreaking Surface Water Ocean Topography (SWOT) satellite mission will provide unprecedented measurements of sea surface height over a wide area with substantially improved spatial resolution compared to traditional altimeters. While SWOT will offer unparalleled coverage in both space and time, it is crucial to obtain in situ subsurface ocean measurements to validate the satellite observations and establish the connection between small-scale variability in sea surface height and subsurface ocean circulation and dynamics.Data for 111 CTD deployments were acquired using the Sea-Bird SBE9+V2 CTD unit #24 (S/N 1332), 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 0.0012454 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 0.78388 μM. The agreement between the CTD and bottle data was good.Additional sensors include: SUNA Nitrate, Altimeter (Tritech PA500), Transmissometer (Wetlabs CStar), CDOM, Chlorophyll-a, Scattering (Wetlabs ECO FLCDRTD) were installed on the auxiliary A/D channels of the CTD.The collected data were processed (quality-controlled), and subsequently 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 Data Processing Report.本记录描述了‘调查者号’（Investigator）科考航次IN2023_V07采集的温盐深（Conductivity, Temperature, Depth, CTD）数据，航次标题为"SWOT-ACC：塔斯马尼亚以南弯曲流区南极绕极流（Antarctic Circumpolar Current, ACC）的更小尺度特征"。本次航次于2023年11月15日至2023年12月20日（澳大利亚东部标准时间，AEST）开展，从霍巴特出发并返回霍巴特。 本航次的核心目标是提升对10~100千米尺度小尺度运动影响南极绕极流动力学过程的观测与理解能力。具有开创性的地表水海洋地形（Surface Water Ocean Topography, SWOT）卫星任务将实现前所未有的大范围海面高度观测，相较于传统高度计，其空间分辨率得到显著提升。尽管SWOT在时空覆盖上具备无可比拟的优势，但获取原位水下海洋测量数据以验证卫星观测结果，并建立海面高度小尺度变化与水下海洋环流及动力学之间的关联，仍至关重要。 本次航次共完成111次CTD布放，采用Sea-Bird SBE9+V2型CTD设备#24（序列号S/N 1332），其搭载的采水器阵列配备36个12升采水瓶。压力与初始电导率值的计算采用Sea-Bird提供的校准系数，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。所有数据均经过自动质量控制，以剔除尖峰噪声与超限值。 最终电导率校准基于单次布放分组完成。主传感器的最终校准标准差（SD）为0.0012454 PSU，优于我们设定的"优于0.002 PSU"的目标。基于主传感器数据，生成了1分巴分箱平均的标准产品。主传感器溶解氧数据的校准拟合标准差为0.78388 μM，CTD数据与采水瓶实测数据的吻合度良好。 附加传感器包括：SUNA硝酸盐传感器、Tritech PA500型高度计、Wetlabs CStar型透射计、有色可溶性有机物（CDOM）传感器、叶绿素-a传感器以及Wetlabs ECO FLCDRTD型散射传感器，上述传感器均安装在CTD的辅助模数转换（A/D）通道上。 采集得到的数据经处理（质量控制）后，由澳大利亚联邦科学与工业研究组织国家海洋收藏与基础设施（National Collections and Marine Infrastructure, NCMI）信息与数据中心（Information and Data Centre, IDC）归档。本数据集的更多相关信息可参阅航次总结报告与数据处理报告。