Oceanography The Official Magazine of
The Oceanography Society
Volume 30 Issue 02

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Volume 30, No. 2
Pages 186 - 197

Ambient Sound at Challenger Deep, Mariana Trench

Robert P. Dziak Joseph H. Haxel Haruyoshi MatsumotoTai-Kwan Lau Sara Heimlich Sharon Nieukirk David K. MellingerJames OsseChristian Meinig Nicholas DelichScott Stalin
Article Abstract

We present a record of ambient sound obtained using a unique deep-ocean instrument package and mooring that was successfully deployed in 2015 at Challenger Deep in the Mariana Trench. The 45 m long mooring contained a hydrophone and an RBR™ pressure-temperature sensor. The hydrophone recorded continuously for 24 days at a 32 kHz sample rate. The pressure logger recorded a maximum pressure of 11,161.4 decibars, corresponding to a depth of 10,829.7 m, where actual anchor depth was 10,854.7 m. Observed sound sources included earthquake acoustic signals (T phases), baleen and odontocete cetacean vocalizations, ship propeller sounds, airguns, active sonar, and the passing of a Category 4 typhoon. Overall, Challenger Deep sound levels in the ship traffic band (20–100 Hz) can be as high as noise levels caused by moderate shipping, which is likely due to persistent commercial and military ship traffic in the region. Challenger Deep sound levels due to sea surface wind/waves (500 Hz to 1 kHz band) are as high as sea state 2, but can also be very low, equivalent to sea state 0. To our knowledge, this is the first long-term (multiday to week) broadband sound record, and only the fifth in situ measurement of depth, ever made at Challenger Deep. Our study indicates that Challenger Deep, the ultimate hadal (>6,000 m) environment, can be relatively quiet but is not as acoustically isolated as previously thought, and weather-related surface processes can influence the soundscape in the deepest parts of the ocean.


Dziak, R.P., J.H. Haxel, H. Matsumoto, T.-K. Lau, S. Heimlich, S. Nieukirk, D.K. Mellinger, J. Osse, C. Meinig, N. Delich, and S. Stalin. 2017. Ambient sound at Challenger Deep, Mariana Trench. Oceanography 30(2):186–197, https://doi.org/10.5670/oceanog.2017.240.

Supplementary Materials

Figure S1 (197 KB pdf)
(left) Schematic of a National Oceanic and Atmospheric Administration/Pacific Marine Environmental Laboratory (NOAA/PMEL) deep-ocean hydrophone and pressure sensor mooring. The mooring is 45 m in length, composed of (1) top mast with satellite beacon, (2) nine glass floats encased in plastic “hardhats,” (3) hydrophone and pressure sensor in double-yoke frame, and (4) a dual acoustic release. (above) Schematic of the PMEL deep-ocean hydrophone, pre-amp, and alkaline battery pack that are all contained in a 62 cm titanium pressure case. 

Figure S2 (123 KB pdf)
(a) Increase in depth in meters (red) and decrease in temperature in (°C) recorded by the RBR™ pressure sensor during the descent of the mooring at Challenger Deep. Maximum hydrostatic pressure recorded was 11,161.4 decibars, corresponding to a maximum depth of 10,829.7 m (the pressure sensor was 25 m above the seafloor). Temperature ranged from a maximum of 28.4°C at the sea surface to a minimum of 2.45°C at the seafloor. (b) Pressure record (depth) time series (with mean removed) from the RBR™ instrument during the two months of the total deployment. Tidal cycles are clearly visible, as is a gradual decrease over the first ~40 days of the deployment. (c) Power spectral density estimate of pressure record showing energy peaks associated with tidal fluctuations. The peak at left representing the neap cycle, and the semidiurnal peaks at 24 and 12 hours were recorded at 10,829.7 m ocean depth.

Figure S3 (672 KB pdf)
Examples of mid- and low-frequency cetacean sounds recorded on the Challenger Deep hydrophone. (a) Toothed whale/dolphin whistles, focused in the 8–11 kHz band with durations of 1–2 s. (b) Two-part, baleen whale tonal call with upper energy band at 400 Hz and low tone at 50 Hz, both parts of 1–2 s duration. These tones are the low-frequency part of a complex baleen call identified recently by Nieukirk et al. (2016). (c) Percent of the day the baleen vocalizations were recorded by the Challenger Deep hydrophone (manually selected by an analyst). 


Ainslie, M.A., and J.G. McColm. 1998. A simplified formula for viscous and chemical absorption in sea water. Journal of the Acoustical Society of America 103(3):1,671–1,672, https://doi.org/​10.1121/1.421258

Allen, R.L. Jr., and US Navy; Naval Oceanographic Office. 2012. Global gridded physical profile data from the U.S. Navy’s Generalized Digital Environmental Model (GDEM) product database (NODC Accession 9600094). Version 1.1. National Oceanographic Data Center, NOAA. Dataset, https://data.nodc.noaa.gov/cgi-bin/iso?id=gov.noaa.nodc:9600094

Au, W.W.L. 1993. The Sonar of Dolphins. Springer, New York, https://doi.org/10.1007/​978-1-4612-4356-4.

Barclay, D.R., and M.J. Buckingham. 2010. Ambient noise in the Mariana Trench. Journal of the Acoustical Society of America 128:2300, https://doi.org/10.1121/1.3508084

Barclay, D.R., and M.J. Buckingham. 2014. On the spatial properties of ambient noise in the Tonga Trench, including effects of bathymetric shadowing. Journal of the Acoustical Society of America 136:2497, https://doi.org/10.1121/1.4896742

Barclay, D.R., F. Simonet, and M.J. Buckingham. 2009. Deep sound: A free-falling sensor platform for depth-profiling ambient noise in the deep ocean. Marine Technology Society Journal 43(5):144–150, https://doi.org/10.4031/MTSJ.43.5.19.

Baird, R.W., D.L. Webster, D.J. McSweeney, A.D. Ligon, G.S. Schorr, and J. Barlow. 2006. Diving behavior of Cuvier’s (Ziphus cavirostris) and Blainville’s (Mesoplodon densirostris) beaked whales in Hawai’i. Journal of Zoology 84:1,120–1,128, https://doi.org/10.1139/z06-095.

Caress, D.W., D.N. Chayes, and C. dos Santos Ferreira. 2015. MB-System seafloor mapping software: Processing and display of swath sonar data, http://www.mbari.org/products/research-software/mb-system.

Carruthers, J.N., and A.L. Lawford. 1952. The deepest oceanic sounding. Nature 169:601–603, https://doi.org/10.1038/169601a0.

Dziak, R.P., D.R. Bohnensteihl, H. Matsumoto, C.G. Fox, D.K. Smith, M. Tolstoy, T.-K. Lau, J.H. Haxel, and M.J. Fowler. 2004. P- and T-wave detection thresholds, Pn velocity estimate, and detection of lower mantle and core P-waves on ocean sound-channel hydrophones at the Mid-Atlantic Ridge. Bulletin of the Seismological Society of America 94(2):665–677, https://doi.org/​10.1785/0120030156

Dziak, R.P., J.H. Haxel, H. Matsumoto, C. Meinig, N. Delich, J. Osse, and M. Wetzler. 2015. Deployment and recovery of a full-ocean depth mooring at Challenger Deep, Mariana Trench. In Oceans 2015 MTS/IEEE, Marine Technology Society and Institute of Electrical and Electronics Engineers, Washington, DC, October 19–22, 2015.

Feistel, R., and E. Hagen. 1995. On the GIBBS thermodynamic potential of seawater. Progress in Oceanography 36:249–327, https://doi.org/​10.1016/0079-6611(96)00001-8

Frisk, G., D. Bradley, J. Caldwell, G. D’Spain, J. Gordon, M. Hastings, and D. Ketten. 2003. Ocean Noise and Marine Mammals, 3rd ed. National Academies Press, Washington, DC, 221 pp. 

Fulling, G.L., P.H. Thorson, and J. Rivers. 2011. Distribution and abundance estimates for cetaceans in the waters off Guam and the Commonwealth of the Northern Mariana Islands. Pacific Science 65(3):321–343, https://doi.org/​10.2984/65.3.321.

Gardner, J.V., A.A. Armstrong, B.R. Calder, and J. Beaudoin. 2014. So, how deep is the Mariana Trench? Marine Geodesy 37:1–13, https://doi.org/​10.1080/01490419.2013.837849.

Goldbogen, J.A., B.L. Southall, S.L. DeRuiter, J. Calambokidis, A.S. Friedlander, E.L. Hazen, E.A. Falcone, G.S. Schorr, A. Douglas, D.J. Moretti, and others. 2013. Blue whales respond to simulated mid-frequency military sonar. Proceedings of the Royal Society B 280, https://doi.org/10.1098/rspb.2013.0657.

Hatch, L.T., C.W. Clark, S.M. van Parijs, A.S. Frankel, and D.W. Ponirakis. 2012. Quantifying loss of acoustic communication space for right whales in and around a US National Marine Sanctuary. Conservation Biology 26:983–994, https://doi.org/10.1111/j.1523-1739.2012.01908.x.

Hatch, L.T., and A.J. Wright. 2007. A brief review of anthropogenic sound in the oceans. International Journal of Comparative Psychology 20:121–133.

Hildebrand, J.A. 2009. Anthropogenic and natural sources of ambient noise in the ocean. Marine Ecology Progress Series 395:5–20, https://doi.org/10.3354/meps08353.

Hill, M.C., E.M. Oleson, S. Baumann-Pickering, A.M. VanCise, A.D. Ligon, A.R.Bendlin, A.C. Ü, J.S. Trickey, and A.L. Bradford. 2016. Cetacean monitoring in the Mariana Islands Range Complex, 2015. Data Report DR-16-01, NOAA Pacific Islands Fisheries Science Center, Honolulu, HI, 55 pp.

IOC, SCOR, and IAPSO. 2010. The international thermodynamic equation of seawater–2010: Calculation and use of thermodynamic properties. Intergovernmental Oceanographic Commission, Manuals and Guides No. 56, UNESCO (English), 196 pp.

McDougall, T.J., D.R. Jackett, D. G. Wright, and R. Feistel. 2003. Accurate and computationally efficient algorithms for potential temperature and density of seawater. Journal of Atmospheric and Oceanic Technology 20(5):730–741, https://doi.org/10.1175/1520-0426(2003)20​<730:AACEAF>2.0.CO;2.

McKenna, M.F., D. Ross, S.M. Wiggins, and J.A. Hildebrand. 2012. Underwater radiated noise from modern commercial ships. Journal of the Acoustical Society of America 131:92–103, https://doi.org/10.1121/1.3664100.

National Geographic Society. 2012. James Cameron’s Deepsea Challenge, http://www.deepseachallenge.com.

Lippsett, L., and A.E. Nevala. 2009. Nereus dives to the ocean’s deepest trench. Oceanus 47(3):30.

Nieukirk, S.L., S. Fregosi, D.K. Mellinger, and H. Klinck. 2016. A complex baleen whale call recorded in the Mariana Trench Marine National Monument. Journal of the Acoustical Society of America 140:EL274, https://doi.org/​10.1121/1.4962377.

NRC (National Research Council). 2003. Ocean Noise and Marine Mammals. The National Academies Press, 204 pp. 

Parks, S.E., M.P. Johnson, D.P. Nowacek, and P.L. Tyack. 2012. Changes in vocal behavior of North Atlantic right whales in increased noise. Advances in Experimental Medicine and Biology 730:317–320, https://doi.org/​10.1007/978-1-4419-7311-5_70.

Piccard, J., and R.S. Dietz 1961. Seven Miles Down: The Story of the Bathyscaphe Trieste. G.P. Putnam’s Sons, New York.

Pijanowski, B.C., L.J. Villanueva-Rivera, S.L. Dumyahn, A. Farina, B.L. Krause, B.M. Napoletano, S.H. Gage, and N. Pieretti. 2011. Soundscape ecology: The science of sound in the landscape. BioScience 61:203–216, https://doi.org/​10.1525/bio.2011.61.3.6

Porter, M.B. 2011. The BELLHOP Manual and User’s Guide: Preliminary Draft. Heat, Light, and Sound Research Inc., La Jolla, California, 57 pp.

Rolland, R.M., S.E. Parks, K.E. Hunt, M. Castellote, P.J. Corkeron, D.P. Nowacek, and S.K. Wasser. 2012. Evidence that ship noise increases stress in right whales. Proceedings of the Royal Society B 279:2,363–2,368, https://doi.org/10.1098/rspb.2011.2429.

Smoczyk, G.M., G.P. Hayes, M.W. Hamburger, H.M. Benz, A. Villaseñor, and K.P. Furlong. 2013. Seismicity of the Earth 1900–2012 Philippine Sea Plate and vicinity. US Geological Survey Open-File Report 2010–1083-M, scale 1:10,000,000, https://doi.org/10.3133/ofr20101083m.

Soldevilla, M.S., E.E. Henderson, G.S. Campbell, S.M. Wiggins, J.A. Hildebrand, and M.A. Roch. 2008. Classification of Risso’s and Pacific white-sided dolphins using spectral properties of echolocation clicks. Journal of the Acoustical Society of America 124:609–624, https://doi.org/​10.1121/1.2932059.

Southhall, B.L., D. Moretti, A. Bruce, J. Calambokidis, S.L. DeRuiter, and P.L. Tyack. 2012. Marine mammal behavioral response studies in southern California: Advances in technology and experimental methods. Marine Technology Society Journal 46:48–59, https://doi.org/10.4031/mtsj.46.4.1.

Taira, K., S. Kitagawa, T. Yamashiro, and D. Yanagimoto. 2004. Deep and bottom currents in the Challenger Deep, Mariana Trench, measured with super-deep current meters. Journal of Oceanography 60:919–926, https://doi.org/10.1007/s10872-005-0001-y.

Than, K. 2012. James Cameron completes record-breaking Mariana Trench dive. National Geographic News, March 25, 2012, http://news.nationalgeographic.com/news/2012/03/120325-james-cameron-mariana-trench-challenger-deepest-returns-science-sub.

Therberge, A. 2008. Thirty years of discovering the Mariana Trench. Hydro International 12:38–39.

Tolstoy, M., J.B. Diebold, S.C. Webb, D.R. Bohnenstiehl, E. Chapp, R.C. Holmes, and M. Rawson. 2004. Broadband calibration of R/V Ewing seismic sources. Geophysical Research Letters 31:1–4, https://doi.org/10.1029/​2004GL020234.

WHOI. 2014. Robotic deep-sea vehicle lost on dive to 6-mile depth. News release, http://www.whoi.edu/news-release/Nereus-Lost.

Wenz, G.M. 1962. Acoustic ambient noise in the ocean: Spectra and sources. Journal of the Acoustical Society of America 34:1,936–1,956, https://doi.org/10.1121/1.1909155.

Wilcock, W.S.D., K.M. Stafford, R.K. Andrew, and R.I Odom 2014. Sounds in the ocean at 1–100 Hz. Annual Review of Marine Sciences 6:117–140, https://doi.org/10.1146/annurev-marine-121211-172423.