Conductivity, Temperature, Pressure (CTD) measurements from Sea Bird Electronics SBE37 instruments taken in the Eurasian Basin, Arctic Ocean, 2018-2021.

The long-term mooring M1-4c was deployed in the Eurasian Basin of the Arctic Ocean at 78o28.084N (North) and 125o57.679E (East), 2700 meter (m) during the Nansen and Amundsen Basin Observational System (NABOS) 2018 cruise. It was successfully recovered on September 19, 2021. The primary goal of mooring Conductivity, Temperature, Pressure (CTD) observations was to understand the role of stratification in controlling transports of the Atlantic Water heat and other properties to the upper ocean and ice. Primary objectives included quantifying the structure and temporal variability of the main water masses and obtaining detailed information about upper ocean, halocline, and Atlantic water (AW) layer dynamics and seasonal variations. This data set contains separate text files with outputs of each Sea Bird Electronics (SBE)-37 instrument at M1-4c mooring. SBE-37 data file includes a one-row header with titles for all data columns. Processing SBE-37 records utilized standard data processing packages provided by vendors. Some records provided by SBE-37 instruments required corrections of salinity in order to remove vertical instabilities. Each data row includes observations of temperature in-situ, conductivity, pressure, salinity, and date/time stamp, which contains day, month, year, hour, minutes, and seconds of measurements. All SBE-37 instruments used Greenwich Mean Time (GMT) for this time stamp.

长期锚系M1-4c布放于北冰洋欧亚海盆，坐标为北纬78°28.084′、东经125°57.679′，布放水深2700米，部署于2018年南森与阿蒙森海盆观测系统（Nansen and Amundsen Basin Observational System, NABOS）科考航次期间。该锚系于2021年9月19日成功回收。本锚系搭载的电导率-温度-压力（Conductivity, Temperature, Pressure, CTD）观测核心目标，是厘清层化作用在调控大西洋水热量及其他属性向上层海洋与海冰输运过程中所发挥的作用。核心观测目标还包括量化主要水团的结构与时间变化特征，获取上层海洋、盐跃层以及大西洋水（Atlantic Water, AW）层的动力学过程与季节变化的详细信息。本数据集包含M1-4c锚系上每台海鸟电子（Sea Bird Electronics, SBE）-37仪器的观测输出文本文件。SBE-37数据文件包含一行表头，标注了所有数据列的字段名称。SBE-37观测记录的处理采用了厂商提供的标准数据处理软件包。部分SBE-37仪器的观测记录需进行盐度校正，以消除垂直不稳定性带来的影响。每条数据行包含原位温度、电导率、压力、盐度的观测值，以及测量日期与时间戳，时间戳涵盖测量的日、月、年、时、分、秒信息。所有SBE-37仪器的时间戳均采用格林尼治标准时间（Greenwich Mean Time, GMT）。