Strait of Georgia Echosounder, Bioacoustic Deployed 2010-02-19

The ASL Acoustic Water Column Profiler 55036 was deployed on 2010-02-19 at Strait of Georgia. Strait of Georgia is located between Vancouver Island and the mainland of British Columbia. There are many narrow channels and islands in this region. Located at the south end are the Gulf Islands and San Juan Islands. The Discovery Islands and Discovery Passage are located at the north end. 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 Network Canada's Oceans 2.0 digital infrastructure, with quality assurance and derived data products following established practices.

ASL声学水柱剖面仪55036于2010年2月19日部署于乔治亚海峡（Strait of Georgia）。乔治亚海峡地处温哥华岛（Vancouver Island）与不列颠哥伦比亚省（British Columbia）本土之间，区域内遍布众多狭窄水道与岛屿。其南端坐落着海湾群岛（Gulf Islands）与圣胡安群岛（San Juan Islands），北端则分布有发现群岛（Discovery Islands）与发现水道（Discovery Passage）。

本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背散射信号，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。该设备搭载一个或多个换能器（transducer），可发射特定频率的声学脉冲；当脉冲击中水体中的动物或其他物体时，会产生回波，换能器可探测该回波并将其转换为电信号。后续可通过软件计算水体中生物及其他物体的距离、尺寸、浓度与移动状态。

该设备部署于固定平台。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 Network Canada）的Oceans 2.0数字基础设施对外共享，其质量管控与衍生数据产品均遵循既定行业规范。