FY 2020 Ocean sound levels in the northeast Pacific recorded from an autonomous underwater glider Haxel, J.H., H. Matsumoto, C. Meinig, G. Kalbach, T.-K.A. Lau, R.P. Dziak, and S. Stalin PLoS One, 14(11), e0225325, doi: 10.1371/journal.pone.0225325, View online (2019) 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 1990–2000s 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. Feature Publications | Outstanding Scientific Publications Contact Sandra Bigley | Help
