Fraser River Delta Upper Slope Echosounder, Bioacoustic Deployed 2013-05-02

The ASL Zooplankton Acoustic Profiler 1009 was deployed on 2013-05-02 at Fraser River Delta Upper Slope. This site is located on the upper slope of the Fraser River delta, where depth is approximately 100 metres. This device is a Echosounder, Bioacoustic. Echosounders are used to measure acoustic backscatter as a proxy for detecting zooplankton, fish, bubbles or other particles in the water-column. An echosounder has one or more transducers which emit acoustic pulses at a particular frequency. When the pulses strike animals or other objects in the water, echoes are produced, which can be detected and converted by the transducers back into electrical signals. Software is then used to determine distances, sizes, concentrations and movements of organisms and other objects in the water. It was deployed on a fixed platform. Data from this deployment were archived and made available through Ocean Networks Canada's Oceans 2.0 digital infrastructure, with quality assurance and derived data products following established practices.

ASL浮游动物声学剖面仪1009（ASL Zooplankton Acoustic Profiler 1009）于2013年5月2日部署于弗雷泽河三角洲上陆坡。该布设点位位于弗雷泽河三角洲上陆坡区域，水深约100米。该设备为生物声学回声测深仪（Bioacoustic Echosounder）。回声测深仪通过测量声学反向散射信号，以其作为替代指标探测水柱内的浮游动物、鱼类、气泡及其他颗粒物。该回声测深仪配备一个或多个换能器，可发射特定频率的声学脉冲。当脉冲击中水中的生物或其他物体时，会产生回波；换能器可探测该回波并将其转换为电信号。后续可通过配套软件计算水体中生物及其他物体的距离、尺寸、浓度与移动轨迹。该设备部署于固定平台之上。本次部署获取的数据已完成归档，并通过加拿大海洋网络（Ocean Networks Canada）的Oceans 2.0数字基础设施对外共享；所有数据均遵循既定规范开展质量管控，并生成衍生数据产品。