Ocean sound levels in the northeast Pacific recorded from an autonomous underwater glider

Joseph H Haxel, Haru Matsumoto, Christian Meinig, Gabriella Kalbach, Lau T-K, Robert P Dziak and Scott Stalin

PLOS ONE, 2019, vol. 14, issue 11, 1-20

Abstract: Ocean gliders are a quiet and efficient mobile autonomous platform for passive acoustic monitoring and oceanographic measurements in remote marine environments. During July 20—August 6 2012, we used a Teledyne Webb Research Slocum G2 glider equipped with a hydrophone logging system to record ocean sound along a 458 km north to south traverse of the outer continental shelf break along the U.S. Pacific Northwest coast. Glider derived recordings yielded a unique perspective on the variation of ambient sound with depth, where natural wind generated surface processes were identified as a dominant acoustic contributor to spectral levels in the region. Near and far-field vessel radiated noise were also found to add significant energy to ambient conditions. Spatially distributed measurements of ambient sound levels recorded from the glider were consistent with long-term spectral estimates from fixed station, deep ocean hydrophone array measurements during the 1990–2000’s in the region. Ocean sound level measurements captured by a mobile glider are shown to be an effective and valuable asset for describing ocean surface wind conditions and characterizing spatial and temporal changes in the underwater acoustic environment over a broad regional scale.

Date: 2019
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0225325

DOI: 10.1371/journal.pone.0225325

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