A slowdown in global trade activity due to COVID-19 has led to a reduction in commercial shipping traffic into the Port of Vancouver. The Ocean Networks Canada observatory system provides researchers real-time access to oceanographic data from a wide range of instruments including hydrophones located along the offshore and inshore approaches to Vancouver. Measurements of power spectral density at 100 Hz from four of these bottom mounted hydrophones are presented, along with AIS data and shipping and trade statistics to assess to what extent the economic impact of COVID-19 can be observed acoustically and in near real-time. The quarterly trend in median weekly noise power in the shipping band of frequencies shows that a reduction in noise commensurate with the economic slowdown has been observed at three of the four hydrophone stations.

中文翻译：

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实时观察COVID-19对水下噪声的影响。

由于COVID-19，全球贸易活动放缓，导致进入温哥华港的商业运输量减少。加拿大海洋网络天文台系统为研究人员提供了从多种仪器中实时访问海洋数据的方法，这些仪器包括位于温哥华近海和近海途径的水听器。介绍了其中四个底部安装的水听器在100 Hz时功率谱密度的测量结果，以及AIS数据以及运输和贸易统计数据，以评估在多大程度上可以通过声学和近实时观察到COVID-19的经济影响。在频率范围内，每周噪声功率中位数的季度趋势表明，在四个水听器站中，有三个观测到的噪声降低与经济增长相对应。