Quantifying the effect of ship noise on the acoustic environment of the Bering Strait
Quantifying the effect of ship noise on the acoustic environment of the Bering Strait
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量化船舶噪声对白令海峡声环境的影响
DOI：
10.1016/j.marpolbul.2022.114557
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发表时间：
2023
影响因子：
5.8
通讯作者：
Laidre, Kristin L.
中科院分区：
文献类型：
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作者：
Escajeda, Erica D.;Stafford, Kathleen M.;Woodgate, Rebecca A.;Laidre, Kristin L.
狭窄的白令海峡是太平洋和北极之间的唯一门户，使迁徙的海洋哺乳动物靠近通过海峡的船只。我们描述了 2013 年至 2015 年开放水域季节（7 月至 11 月）白令海峡船舶活动的特征，并量化了船舶噪声对须鲸使用的频段（25-1000 Hz）的第三倍频程声级 (TOL) 的影响。船舶活动高峰期发生在 7 月至 9 月，其中 10 月份观察到的船舶噪音和鲸鱼发声重叠最多。船舶的所有 TOL 频段组合的声级平均升高约 4 dB，并且从距离水听器超过 11 公里的两艘大型船舶记录到超过 100 dB re 1 μPa 的 250 Hz TOL。我们的研究结果表明，船舶噪音有可能影响白令海峡的须鲸，并可作为衡量该地区船舶活动未来变化的基线。
The narrow Bering Strait provides the only gateway between the Pacific Ocean and the Arctic, bringing migrating marine mammals in close proximity to ships transiting the strait. We characterized ship activity in the Bering Strait during the open-water season (July–November) for 2013–2015 and quantified the impact of ship noise on third-octave sound levels (TOLs) for bands used by baleen whales (25–1000 Hz). Peak ship activity occurred in July–September with the greatest overlap in ship noise and whale vocalizations observed in October. Ships elevated sound levels by ∼4 dB on average for all TOL bands combined, and 250-Hz TOLs exceeding 100 dB re 1 μPa were recorded from two large vessels over 11 km away from the hydrophones. Our results show that ship noise has the potential to impact baleen whales in the Bering Strait and serve as a baseline for measuring future changes in ship activity in the region.