CTD profiles and underway seawater samples from INVT01_2024 (KSA324 assessment 2024)

This record describes the conductivity-temperature-depth (CTD) data and underway water sample data collected during the CSIRO Investigator transit voyage INVTO1_2024, between 9 March and 20 March 2024. The objective of the voyage was for a safe transit from Fremantle, Western Australia, to Hobart, Tasmania. This record was part of a piggyback project whereby undergraduate students attained at-sea training through the Institute of Marine and Antarctic Studies and the University of Tasmania. The project aim was for students to gain experience with oceanographic data collection, processing and analysis. The CTD data includes 7 CTD profiles that measured conductivity, temperature, pressure, dissolved oxygen, salinity, fluorescence, turbidity and photosynthetically active radiation (PAR). Each of these parameters were collected during each CTD profile. The CTD data also includes calculated measurements of ammonium, nitrate, nitrite, phosphate, silicate, as well as chlorophyll-a, from select rosette bottles. The underway water sample data includes 41 duplicate samples of calculated measurements of chlorophyll-a and associated calculated measurements of ammonium, nitrate, nitrite, phosphate and silicate nutrient concentrations. In both data files, ODV quality flags have been used to indicate data quality.

本数据集记录了澳大利亚联邦科学与工业研究组织（Commonwealth Scientific and Industrial Research Organisation，CSIRO）“调查号”（Investigator）科考船航次INVTO1_2024期间采集的温盐深（Conductivity-Temperature-Depth，CTD）数据与走航水样数据，该航次执行时段为2024年3月9日至3月20日。本次航次的任务为从澳大利亚西澳州弗里曼特尔安全航行至塔斯马尼亚州霍巴特。本数据集隶属于一项附带项目，该项目由塔斯马尼亚大学海洋与南极研究所牵头，为本科生提供海上实习培训，旨在让学生积累海洋学数据采集、处理与分析的实践经验。温盐深数据包含7条CTD剖面数据，所测参数涵盖电导率、温度、压力、溶解氧、盐度、荧光值、浊度以及光合有效辐射（Photosynthetically Active Radiation，PAR），每条CTD剖面均完整采集了上述所有参数。此外，温盐深数据还包含从选定的罗塞采水器采样瓶中得到的铵态氮、硝酸盐、亚硝酸盐、磷酸盐、硅酸盐以及叶绿素a的计算值。走航水样数据包含41组平行水样，涵盖叶绿素a的计算值，以及与之配套的铵态氮、硝酸盐、亚硝酸盐、磷酸盐和硅酸盐营养盐浓度的计算值。两份数据文件均采用ODV（Ocean Data View）质量标记来表征数据质量。