Ocean hydrography and current profiles from the Nansen Legacy Winter Process Cruise to the northern Barents Sea, KH2021702, February 2021

As a part of the Nansen Legacy Winter Process Cruise, physical oceanography data were collected during the cruise, KH2021702 on R/V Kronprins Haakon in February 2021. The goal was to conduct ocean mixing and water transformation process studies in the Barents Sea Polar Front region east of Svalbard, in the northern Barents Sea. This data set is a compilation of data from the shipboard conductivity-temperature-depth (CTD) system, the lowered-ADCP (acoustic Doppler current profiler) LADCP system and the ship’s hull-mounted ADCP (SADCP), provided as three separate NetCDF files: KH2021702_CTD.nc: 89 profiles of salinity, temperature and density using the ship’s CTD system. Profiles from the ancillary sensors on the CTD system are also included, but not calibrated using in-situ water samples. The ancillary profiles are of dissolved oxygen, chlorophyll-A signal from the fluorescence sensor, coloured dissolved organic matter signal from the fluorescence sensor, downwelling photosynthetic available radiation, and beam attenuation from transmissometer. KH2021702_LADCP.nc: 89 profiles of horizontal currents from the lowered-ADCP (LADCP) system attached on the CTD rosette. KH2021702_SADCP.nc : 18.6 day, 2-minute time-averaged horizontal current profiles from the 150-kHz hull-mounted RDI Ocean Surveyor ADCP (SADCP). Additionally, the ocean microstructure profiles are available from Fer et al (2023, https://doi.org/10.21335/NMDC-1939445412). Details on the instruments, sampling, data processing, an overview of the data, and a detailed list of stations are provided in the cruise report (Nilsen et al. 2021, https://doi.org/10.7557/nlrs.6324)

作为南森遗产冬季过程航次（Nansen Legacy Winter Process Cruise）的组成部分，科研团队于2021年2月在搭载于“哈康王储号”（R/V Kronprins Haakon）的KH2021702航次中采集了物理海洋学数据。本航次的研究目标为在斯瓦尔巴德群岛以东、巴伦支海北部的巴伦支海极锋区域开展海洋混合与水团变性过程研究。
本数据集整合了船载温盐深（conductivity-temperature-depth, CTD）系统、下放式声学多普勒流速剖面仪（lowered-ADCP, LADCP）以及船体安装式声学多普勒流速剖面仪（ship’s hull-mounted ADCP, SADCP）的观测数据，以三个独立的NetCDF文件形式提供：
1. KH2021702_CTD.nc：包含船载CTD系统采集的89组盐度、温度与密度剖面数据。同时纳入了CTD系统配套传感器的观测剖面，但未使用原位水样进行校准。配套传感器的观测参数包括溶解氧、荧光传感器测得的叶绿素-a信号、荧光传感器测得的有色溶解有机物信号、下行光合有效辐射，以及透射仪测得的光束衰减系数。
2. KH2021702_LADCP.nc：包含安装于CTD采水器架上的下放式ADCP（LADCP）系统采集的89组水平流场剖面数据。
3. KH2021702_SADCP.nc：包含150kHz船体安装式RDI Ocean Surveyor ADCP（SADCP）采集的、时长18.6天、时间分辨率为2分钟的平均水平流场剖面数据。
此外，海洋微结构剖面数据可参考文献Fer等人（2023，https://doi.org/10.21335/NMDC-1939445412）获取。关于仪器设备、采样方案、数据处理方法、数据概况以及测站详细列表，请参阅航次报告（Nilsen等人，2021，https://doi.org/10.7557/nlrs.6324）