北海的水下声音景观
F Basan1, J-G Fischer1, R Putland2
1Federal Maritime and Hydrographic Agency (BSH), Germany.
Marine pollution bulletin
|December 15, 2023
概括
北海环境噪声联合监测计划 (JOMOPANS) 制定了一个北海水下噪声基准. 这项研究确定了噪音水平,风速和船只距离之间的相关性,这对保护海洋生物至关重要.
科学领域:
- 海洋声学 海洋声学
- 环境监测环境监测环境监测
- 海洋学 海洋学 海洋学
背景情况:
- 越来越多的人意识到人类造成的水下噪声对海洋生态系统的影响.
- 需要标准化的水下噪声测量程序来评估海洋环境.
- 北海环境噪声联合监测计划 (JOMOPANS) 倡议.
研究的目的:
- 建立一个独特的数据集在北海 (2019-2020) 的水下噪声水平.
- 描述和比较环境噪声,为未来的北海测量创造一个基准.
- 识别具有相似声学特征的地理区域,并了解噪声源的相关性.
主要方法:
- 从北海的19个地点收集了水下噪音数据.
- 在三个宽带频段 (25-160 Hz,0.2-1.6 kHz,2-10 kHz) 中分析了环境噪声特征.
- 评估了声音水平与环境因素 (如风速,船只近距离和海洋流速) 之间的相关性.
主要成果:
- 识别了具有类似声音特征的地理集群.
- 在高频噪音 (>1 kHz) 和风速之间发现了持久的相关性.
- 观察到中/高频噪声 (40 Hz-4 kHz) 和与船舶的距离之间的相关性.
- 评估与低频噪声 (<200 Hz) 和海洋电流速度的相关性,推导出线性缩放规律.
结论:
- JOMOPANS数据集为北海水下噪声监测提供了关键的基线.
- 了解声音源的空间变化对于预测降噪策略的影响至关重要.
- 调查结果支持明智的管理决策,以减轻海洋环境中人类造成的噪音污染.
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