Raw and converted data from under-ice turbulence measurements using an ice-mounted 5-beam ADCP deployed during the RV POLARSTERN cruise PS131 ATWAICE to the Arctic marginal ice zone in July 2022

High-resolution observations of under ice currents were collected using a 5-beam acoustic Doppler current profiler (ADCP) during the RV Polarstern cruise PS131 to the Marginal Ice Zone on Yermak Plateau in summer 2022. The Nortek Signature1000 ADCP (SN 100154) was deployed on a drifting ice floe. It was set up with an external 540 Wh Alkaline battery in a storm case. The ADCP was pointing downwards, attached to a rod, protruding approximately 0.5 m below the underside of the ice, which was approximately 1.8 m thick. It was secured with buoyancy. The instrument was deployed in water on 13 July 2022, 15:25 UTC, and recovered on 30 July 2022, 08:05 UTC. A GPS tracker (2022P10017 / 610) was located next to the ADCP, the raw data of this trajectory are archived here: https://doi.pangaea.de/10.1594/PANGAEA.959001 (event PS131_47-1_9). The ADCP has 5 beams (4 in Janus configuration and one vertical beam) and is equipped with the high-resolution (HR) feature giving high-quality pulse-to-pulse coherent profiles for turbulence measurements. We used a concurrent plan with average profiles and bursts using 5 beams. Average profiles were obtained as 60 s averages every 5 minutes with 20% measurement load, starting from 0.2 m from the transducer to 18 m, with 1 m cell sizes. The HR profiles were obtained with 5 cm cell sizes between 0.1 to 2.5 m from the transducers, with 2.85 m pulse distance at maximum power level. Bursts were obtained every 30 minutes at 4 Hz as 4096 (about 17 min) samples, in beam coordinate system. In this configuration horizontal precision is 0.99 cm/s, and vertical precision is 0.33 cm/s for the average profiles. The estimated maximum length of using the provided battery was 67 days. During the second visit of the floe on 20 July 2022, at approximately 20:35 UTC, the instrument was removed from the hole for cleaning the hole and placed back in a similar heading orientation. This action is visible in the time series of pressure, pitch, and heading. The dataset includes the data downloaded from the instrument in its native binary format as well as the data converted into physical units using Nortek's Signature Deployment software. The converted data are provided in MATLAB format, exported using the Signature Deployment software. This software, the instrument setup file and the configuration files are also provided.2022年夏季，在前往亚马克高原（Yermak Plateau）边缘冰区的RV Polarstern（极星号）科考船PS131航次中，研究人员使用5波束声学多普勒流速剖面仪（acoustic Doppler current profiler, ADCP）采集了冰下洋流的高分辨率观测数据。本次使用的设备为Nortek Signature1000型ADCP（序列号SN 100154），被部署在一处漂流浮冰上。该设备搭配外置540 Wh碱性电池，并封装于防风暴防护箱内。ADCP向下指向，通过杆件固定，伸出冰盖下表面约0.5米；当时冰盖厚度约1.8米，设备通过浮力装置进行固定。该仪器于协调世界时（UTC）2022年7月13日15:25布放于水下，并于2022年7月30日08:05完成回收。ADCP旁搭载了一台GPS追踪器（编号2022P10017 / 610），其轨迹原始数据已归档于：https://doi.pangaea.de/10.1594/PANGAEA.959001（航次事件PS131_47-1_9）。该ADCP共包含5个波束（4个采用Janus构型，1个为垂直波束），并搭载高分辨率（high-resolution, HR）功能，可输出高质量的逐脉冲相干剖面，用于湍流观测。本次观测采用同步观测方案，结合平均剖面与突发采样模式，全程使用5个波束进行数据采集。平均剖面以每5分钟输出一次60秒平均数据的方式获取，测量负载为20%，测量量程为换能器下方0.2 m至18 m，单元格尺寸为1 m。高分辨率剖面的测量量程为换能器下方0.1 m至2.5 m，单元格尺寸为5 cm；在最大功率模式下，脉冲间距为2.85 m。突发采样每30分钟触发一次，采样频率为4 Hz，单次采样量为4096个（时长约17分钟），数据采用波束坐标系存储。在此配置下，平均剖面的水平测量精度为0.99 cm/s，垂直测量精度为0.33 cm/s。本次搭载的碱性电池理论最长续航时长为67天。2022年7月20日约20:35 UTC，科考队对该浮冰进行第二次访查期间，为清理冰孔将仪器取出，并以相近的方位角重新布放；该操作可从压力、俯仰角与方位角的时间序列中观测到。本数据集包含仪器原生二进制格式的原始数据，以及使用Nortek Signature Deployment软件转换为物理单位后的处理数据。转换后的数据以MATLAB格式提供，通过Signature Deployment软件导出。该软件、仪器配置文件与参数配置文件亦随数据集一并提供。