Arctic IES UTL Directional Acoustic Fish Tracker (DAFT) Platform Data, C4 Mooring Site, Chukchi Sea, August 2017 to September 2019

These data are part of the Arctic IES component of the Arctic Integrated Ecosystem Research Program (IERP), sponsored by the North Pacific Research Board (NPRB), Collaborative Alaskan Arctic Studies Program (formerly the North Slope Borough/Shell Baseline Studies Program), Bureau of Ocean Energy Management (BOEM), and the Office of Naval Research Marine Mammals and Biology Program. To investigate the residence time and seasonal movement of midwater fishes in the U.S. Continental Region of the NE Chukchi Sea, upward-facing echosounder moorings were deployed from August 2017 - September 2019. Acoustic backscatter of the water column was collected 70 kHz for approximately 3 minutes, every 2 hours. This dataset contains a filtered 70 kHz dataset to represent scattering from fishes. Data is integrated into 5-meter water column depth bins and single wake-up (2 hour) time segments, and presented here in CSV format with time identifiers. Supplemental datasets from a) Seabird SBE37 conductivity and temperature recorder and b) underwater logging compass mounted on the platform are included. An engineering diagram of the platform is included. Due to instrument failures, only conductivity and temperature recorder records are included from the 2017 - 2018 deployment.本数据集属于北极综合生态系统研究计划（Arctic Integrated Ecosystem Research Program, IERP）的北极IES组分，由北太平洋研究委员会（North Pacific Research Board, NPRB）、阿拉斯加北极合作研究计划（前身为北坡自治区/壳牌基线研究计划）、美国海洋能源管理局（Bureau of Ocean Energy Management, BOEM）以及美国海军研究办公室海洋哺乳动物与生物学项目资助。 为探究楚科奇海东北部美国大陆架海域中层鱼类的滞留时间与季节移动规律，研究团队于2017年8月至2019年9月布设了朝上安装的回声测深仪锚系装置。 以70kHz频率采集水柱声学背散射数据，每2小时采集一次，每次时长约3分钟。 本数据集包含经过滤波处理的70kHz数据，用于表征鱼类的散射信号。数据已被整合为5米水深分层与2小时单次采样时段的单元，并以带有时间标识符的CSV格式提供。 配套数据集包括：a) 海鸟SBE37电导率与温度记录仪数据，b) 搭载于锚系平台的水下记录罗盘数据；同时提供该锚系平台的工程设计图。 由于仪器故障，2017-2018年度的布设任务仅留存了电导率与温度记录仪的记录数据。