RV Investigator Voyage IN2020_V08 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 IN2020_V08, titled: "SOLACE - Southern Ocean Large Areal Carbon Export: quantifying carbon sequestration in subpolar and polar waters." The voyage took place between December 4, 2020 and January 15, 2021 departing from Hobart (TAS) and arriving in Hobart.

Eight Triaxus tows were undertaken. Tows 1 to 7 were to investigate oceanographic and biological features of interest to the Southern Ocean Large Areal Carbon Export project. The eighth tow was to compare to altimetry satellite data.
Pressure, conductivity, temperature, and dissolved oxygen data were gathered from duplicate sensors using a Seabird SBE9+ CTD. Also carried on the Triaxus hull were a cosine Photosynthetically Active Radiation (PAR) sensor, a transmissometer, an eco-triplet (optical backscatter, CDOM fluorometer and chlorophyll fluorometer), a Laser Optical Plankton Counter (LOPC), and a user-provided Fluorescence Induction and Relaxation (FIRe) system.

On each tow, only data from sections where the Triaxus was undulating regularly were processed. Data from deployment, turns and retrieval were gathered but not further processed.
Pressure, conductivity, temperature, and dissolved oxygen sensor data were converted to calibrated units. Spikes and out-of-range values were removed and primary to secondary sensor data compared. Similarly PAR, transmissometer, and eco-triplet data were combined into the dataset. Both LOPC and FIRe data were gathered but are not processed or published in this report.

Published data have been grouped into 1 decibar bins. Data from the primary sensors were assessed to be more reliable.
On this voyage all tows were made up of sections that were sufficiently short to be recorded in single files.
The published data consist of:
• along-track time-series data for each section
• synthetic interpolated vertical casts data for each undulation peak and trough of each section
• interpolated sectional plots of various taken from along-track time-series data

The collected data were subsequently archived within the CSIRO National Collections and Marine Infrastructure (NCMI) Information and Data Centre (IDC) in Hobart.

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）IN2020_V08航次中，通过拖曳式TRIAXUS平台采集的数据集，包括温盐深仪数据（CTD）、溶解氧、透射仪数据、光合有效辐射（PAR）、ECO三联传感器数据（ECO Triplet）、硝酸盐、荧光及激光光学浮游生物计数器数据（LOPC）。该航次标题为“SOLACE——南大洋大面积碳输出：量化亚极地与极地水域的碳封存”。航次于2020年12月4日至2021年1月15日期间进行，从塔斯马尼亚州霍巴特出发并返回霍巴特。

共开展了8次TRIAXUS拖曳作业。第1至第7次拖曳旨在调查南大洋大面积碳输出项目关注的海洋学与生物学特征；第8次拖曳则用于与卫星测高数据进行对比。

压力、电导率、温度及溶解氧数据通过Seabird SBE9+ CTD的双传感器采集。TRIAXUS平台船体上还搭载了余弦校正光合有效辐射（PAR）传感器、透射仪、ECO三联传感器（含光学后向散射仪、有色溶解有机物荧光计及叶绿素荧光计）、激光光学浮游生物计数器（LOPC），以及用户提供的荧光诱导与弛豫系统（FIRe）。

每次拖曳作业中，仅对TRIAXUS平台呈规则起伏运动阶段的数据进行处理；部署、转向及回收阶段的数据虽已采集，但未作进一步处理。

压力、电导率、温度及溶解氧传感器数据已转换为校准单位；尖峰信号与超出范围的值已被剔除，并对主次传感器数据进行了对比。同理，光合有效辐射（PAR）、透射仪及ECO三联传感器数据已整合至数据集中。激光光学浮游生物计数器（LOPC）与荧光诱导与弛豫系统（FIRe）的数据虽已采集，但未在本报告中进行处理或发布。

已发布数据按1分巴（decibar）的区间分组；主传感器数据被评估为更可靠。

本次航次中，所有拖曳作业的各阶段长度均足够短，可存储于单个文件中。

已发布数据包括：
• 各阶段的沿航迹时间序列数据
• 各阶段每一次起伏的峰谷处合成插值垂直剖面数据
• 基于沿航迹时间序列数据生成的各类插值剖面图谱

采集的数据随后存档于位于霍巴特的澳大利亚联邦科学与工业研究组织（CSIRO）国家收藏与海洋基础设施（NCMI）信息与数据中心（IDC）。

关于本数据集的更多信息可参考航次总结报告及数据处理报告。