Near-surface ocean temperature & salinity measurements (using YSI and Castaway) during the summer component of the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) campaign in the Central Arctic Ocean, July – September 2020

This dataset contains upper ocean temperature and salinity profiles made during July – September, 2020 as part of the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition in the Central Arctic. The primary aim of these profiles was to capture the stratification of the upper ocean due to meltwater input throughout the summer melt season and the transition to fall freeze-up. The dataset includes data from two instruments: (i) YSI probe, and (ii) Sontek Castaway. The YSI probe was used to take point measurements of temperature and salinity, allowing for more fine-scale profiles in the upper couple of meters. The Sontek Castaway is a small conductivity, temperature, and depth (CTD) device that was used to make profiles over the upper 10s of meters, here typically in complement to the YSI observations, and are processed to 15 centimeters (cm) vertical resolution. Profiles were made in two primary locations: (i) near-surface of leads surrounding the sea ice floe, using both YSI and Castaway, and (ii) upper ocean directly beneath the sea ice, typically using YSI only. A small number of additional observations were made in coincident melt ponds and the upper ocean directly underneath. Details of collection and processing methods, including quality control for both instruments, can be found in data archive descriptions.

本数据集收录了2020年7月至9月期间，在北极中部开展的北极气候研究多学科漂流观测站（MOSAiC）科考项目中获取的上层海洋温度与盐度廓线数据。此类廓线的核心设计目标为捕捉整个夏季融冰期及向秋季结冰过渡期内，融水输入引发的上层海洋层结特征。本数据集涵盖两类仪器的观测数据：（i）YSI探头（YSI probe）；（ii）索泰克Castaway（Sontek Castaway）。YSI探头用于开展温度与盐度的定点测量，可获取表层数米范围内的高分辨率廓线数据。索泰克Castaway是一款小型温盐深仪（conductivity, temperature, and depth，简称CTD），用于获取数十米上层海洋的廓线数据，通常作为YSI观测的补充，其数据经处理后达到15厘米（cm）的垂直分辨率。廓线数据主要采集自两类区域：（i）海冰浮冰周边的冰间水道近表层，同步使用YSI探头与Castaway设备；（ii）海冰正下方的上层海洋，通常仅采用YSI探头开展观测。另有少量额外观测数据采集自相伴出现的融冰池及其正下方的上层海洋。两类仪器的观测采集流程、数据处理方法（含质量控制环节）的详细信息，可参阅数据档案说明文档。