Shelf-Break Upwelling in the Western Beaufort Sea – Acoustic Doppler Current Profiler (ADCP) Velocity and Backscatter Amplitude collected using the R/V Sikuliaq 300 kHz ADCP, 2018

This data set contains processed acoustic Doppler current profiler (ADCP) data collected from the research vessel (R/V) Sikuliaq during August 8 - August 27, 2018 on a cruise to the Western Beaufort Shelf. The data were collected to document water velocities and backscatter during a project focusing on the bio-physical impacts of upwelling along the Beaufort Shelf. Data were collected using the centerboard-mounted 300 kHz ADCP continuously from the start/end port of Nome, Alaska, through Bering Strait and the Chukchi Sea to the working area along the shelf-break approximately north of Nuiqsut, Alaska. Data were processed at the Woods Hole Oceanographic Institution using the University of Hawaii Common Ocean Data Access System (CODAS) ADCP data processing system by Frank Bahr. The data set contains year, decimal date (yearday.time, Jan 1= Day 0, decimal time in GMT) , position (latitude, longitude), and water depth for profiles of velocity (undetided and detided, m/s), percent good, and backscatter amplitude. Data are provided in two formats; one excel file and one text file (tab delimited).

本数据集包含经处理的声学多普勒流速剖面仪（Acoustic Doppler Current Profiler，ADCP）数据，采集自“锡利亚克号”科考船（R/V Sikuliaq），采集时段为2018年8月8日至8月27日，对应西波弗特海陆架科考航次。本次数据采集服务于聚焦波弗特海陆架上升流生物物理影响的研究项目，用于记录水流速度与背散射强度数据。数据由安装在中心板上的300 kHz ADCP持续采集，采集航线始于阿拉斯加州诺姆港的起/终港，途经白令海峡、楚科奇海，最终抵达阿拉斯加州努伊克苏特以北约沿陆架坡折带的作业区域。数据由弗兰克·巴尔（Frank Bahr）在伍兹霍尔海洋研究所（Woods Hole Oceanographic Institution），采用夏威夷大学通用海洋数据访问系统（Common Ocean Data Access System，CODAS）配套的ADCP数据处理流程完成处理。本数据集包含以下字段：年份、十进制日期（年积日.时间，1月1日记为第0天，时间采用格林尼治标准时间）、位置信息（纬度、经度）、流速剖面对应的水深，以及流速数据（未经潮汐校正与经潮汐校正，单位：米/秒）、优良率、背散射振幅。数据集提供两种存储格式：一份Excel文件与一份制表符分隔的文本文件。