Is low frequency ocean sound increasing globally?
Is low frequency ocean sound increasing globally?
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DOI：
10.1121/1.4938237
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发表时间：
2016-01-01
影响因子：
2.4
通讯作者：
Nichols, Stephen M.
中科院分区：
文献类型：
--
作者：
Miksis-Olds, Jennifer L.;Nichols, Stephen M.
在过去的60年里，东北太平洋的低频声音有所增加[Ross（1993）Acoust. Bull.18，5-8;（2005）IEEE J. Ocean. 30，257-261; Andrew，Howe，美世和Dzieciuch（2002）J. Acoust.美国社会129，642-651; McDonald，Hildebrand，and Wiggins（2006）J. Acoust.美国社会120，711-717; Chapman和Price（2011）J. Acoust.美国社会129，EL 161-EL 165]和过去十年中在印度洋中[Miksis-Olds，布拉德利和牛（2013）J. Acoust.美国社会134，3464-3475]。最近，Andrew、Howe和美世的[（2011）J. Acoust.美国社会129，642-651]在东北太平洋的观测显示低频噪声水平或略有下降的趋势。目前尚不清楚世界其他地区的低频率趋势。在这项工作中，来自全面禁止核试验条约组织国际监测系统的数据被用来检查过去十年中南大西洋和赤道太平洋低频声音（5- 115 Hz）的变化率和幅度。在南大西洋观测到的主要来源是地震气枪信号，而航运和生物来源对赤道太平洋位置的声学环境贡献更大。在过去5-6年中，赤道太平洋的声级有所下降。南大西洋的环境声底也有所下降。根据这些观察，全球低频声级似乎没有增加。(C)2016年作者。
Low frequency sound has increased in the Northeast Pacific Ocean over the past 60 yr [Ross (1993) Acoust. Bull. 18, 5-8; (2005) IEEE J. Ocean. Eng. 30, 257-261; Andrew, Howe, Mercer, and Dzieciuch (2002) J. Acoust. Soc. Am. 129, 642-651; McDonald, Hildebrand, and Wiggins (2006) J. Acoust. Soc. Am. 120, 711-717; Chapman and Price (2011) J. Acoust. Soc. Am. 129, EL161-EL165] and in the Indian Ocean over the past decade, [Miksis-Olds, Bradley, and Niu (2013) J. Acoust. Soc. Am. 134, 3464-3475]. More recently, Andrew, Howe, and Mercer's [(2011) J. Acoust. Soc. Am. 129, 642-651] observations in the Northeast Pacific show a level or slightly decreasing trend in low frequency noise. It remains unclear what the low frequency trends are in other regions of the world. In this work, data from the Comprehensive Nuclear-Test Ban Treaty Organization International Monitoring System was used to examine the rate and magnitude of change in low frequency sound (5-115Hz) over the past decade in the South Atlantic and Equatorial Pacific Oceans. The dominant source observed in the South Atlantic was seismic air gun signals, while shipping and biologic sources contributed more to the acoustic environment at the Equatorial Pacific location. Sound levels over the past 5-6 yr in the Equatorial Pacific have decreased. Decreases were also observed in the ambient sound floor in the South Atlantic Ocean. Based on these observations, it does not appear that low frequency sound levels are increasing globally. (C) 2016 Author(s).