Abstract
Low-frequency sound in the ocean is produced by natural phenomena such as rain, waves and marine life, as well as by human activities, such as the use of sonar systems, shipping and construction. Sea water absorbs sound mainly owing to the viscosity of the water and the presence of chemical constituents, such as magnesium sulphate, boric acid and carbonate ions. The concentration of dissolved chemicals absorbing sound near 1 kHz depends on the pH of the ocean1, which has declined as a result of increases in acidity due to anthropogenic emissions of carbon dioxide2,3,4. Here we use a global ocean model5,6 forced with projected carbon dioxide emissions7 to predict regional changes in pH, and thus sound absorption, in the years 1800–2300. According to our projections, ocean pH could fall by up to 0.6 units by 2100. Sound absorption—in the range between ∼100 Hz and ∼10 kHz—could fall by up to 60% in the high latitudes and in areas of deep-water formation over the same time period. We predict that over the twenty-first century, chemical absorption of sound in this frequency range will nearly halve in some of the regions that experience significant radiated noise from industrial activity, such as the North Atlantic Ocean. We suggest that our forecast of reduced sound absorption in acoustic hotspots will help in identifying target regions for future monitoring.
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References
Fisher, F. H. Sound absorption in sea water by a third chemical relaxation. J. Acoust. Soc. Am. 66, 1327–1329 (1979).
Brewer, P. G. Ocean chemistry of the fossil fuel CO2 signal: The haline signature of business as usual. Geophys. Res. Lett. 24, 1367–1369 (1997).
Zeebe, R. E., Zachos, J. C., Caldeira, K. & Tyrrell, T. Carbon emissions and acidification. Science 321, 51–52 (2008).
Hester, K. C., Peltzer, E. T., Kirkwood, W. J. & Brewer, P. G. Unanticipated consequences of ocean acidification: A noisier ocean at lower pH. Geophys. Res. Lett. 35, L19601 (2008).
Maier-Reimer, E. Geochemical cycles in an ocean general circulation model. Preindustrial tracer distributions. Glob. Biogeochem. Cycles 7, 645–677 (1993).
Heinze, C., Maier-Reimer, E., Winguth, A. M. E. & Archer, D. A global oceanic sediment model for long-term climate studies. Glob. Biogeochem. Cycles 13, 221–250 (1999).
IPCC Climate Change 2001: The Scientific Basis (eds Houghton, J. T. et al.) (Cambridge Univ. Press, 2001).
National Research Council. Ocean Noise and Marine Mammals (National Academies, 2003).
Kibblewhite, A. C., Shooter, J. A. & Watkins, S. L. Examination of attenuation at very low frequencies using the deep-water ambient noise field. J. Acoust. Soc. Am. 60, 1040–1047 (1976).
Anderson, V. C. Variation of the vertical directionality of noise with depth in the North Pacific. J. Acoust. Soc. Am. 66, 1446–1452 (1979).
Francois, R. E. & Garrison, G. R. Sound absorption based on ocean measurements. Part II: Boric acid contribution and equation for total absorption. J. Acoust. Soc. Am. 72, 1879–1890 (1982).
Sabine, C. L. et al. The oceanic sink for anthropogenic CO2 . Science 305, 367–371 (2004).
Kleypas, J. A. et al. Impacts of Ocean Acidification on Coral Reefs and Other Marine Calcifiers: A Guide to Future Research. Workshop Report (NSF/NOAA/USGS, 2006).
Riebesell, U. et al. Reduced calcification of marine plankton in response to increased atmospheric CO2 . Nature 407, 364–367 (2000).
Orr, J. C. et al. Anthropogenic ocean acidification over the twenty-first century and its impact on calcifying organisms. Nature 437, 681–686 (2005).
IPCC Climate Change 2007: The Physical Science Basis (eds Solomon, S. et al.) (Cambridge Univ. Press, 2007).
Stramma, L., Johnson, G. C., Sprintall, J. & Mohrholz, V. Expanding oxygen-minimum zones in the tropical oceans. Science 320, 655–658 (2008).
Jenkins, W. J. The biogeochemical consequences of changing ventilation in the Japan/East Sea. Mar. Chem. 108, 137–147 (2008).
Bopp, L., Le Quere, C., Heimann, M., Manning, A. C. & Monfray, P. Climate-induced oceanic oxygen fluxes: Implications for the contemporary carbon budget. Glob. Biogeochem. Cycles 16, 1022 (2002).
McDonald, M., Hildebrand, J. & Wiggins, S. Increases in deep ocean ambient noise in the Northeast Pacific west of San Nicolas Island California. J. Acoust. Soc. Am. 120, 711–718 (2006).
Marine Mammal Commission. Marine Mammals and Noise: A Sound Approach to Research and Management <http://mmc.gov/reports/workshop/pdf/fullsoundreport.pdf> (2007).
US Department of Commerce & US Navy. Joint Interim Report: Bahamas Marine Mammal Stranding Event of 14–16 March 2000 <http://www.nmfs.noaa.gov/pr/pdfs/health/stranding_bahamas2000.pdf> (2001).
Cox, T. M. et al. Understanding the impacts of anthropogenic sound on beaked whales. J. Cetacean Res. Management 7, 177–187 (2006).
Mooney, T.A., Nachtigall, P.E. & Vlachos, S. Sonar-induced temporary hearing loss in dolphins. Biol. Lett. 5, 565–567 (2009).
Richardson, W. J., Creene, C. R., Malme, C. I. & Thomson, D. H. Marine Mammals and Noise (Academic, 1995).
Maier-Reimer, E., Mikolajewicz, U. & Hasselmann, K. Mean circulation of the Hamburg LSG OGCM and its sensitivity to the thermohaline surface forcing. J. Phys. Oceanogr. 23, 731–757 (1993).
Six, K. D. & Maier-Reimer, E. Effects of plankton dynamics on seasonal carbon fluxes in an ocean general circulation model. Glob. Biogeochem. Cycles 10, 559–583 (1996).
Ilyina, T., Zeebe, R. E., Maier-Reimer, E. & Heinze, C. Early detection of ocean acidification effects on marine calcification. Glob. Biogeochem. Cycles 23, GB1008 (2009).
Zeebe, R. E. & Wolf-Gladrow, D. A. CO2 in Seawater: Equilibrium, Kinetics, Isotopes (Elsevier, 2001).
Acknowledgements
We thank E. Maier-Reimer for discussing the model code and J. A. Colosi for his comments on the manuscript. This research was supported by National Science Foundation grant NSF: OCE07-51959.
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Ilyina, T., Zeebe, R. & Brewer, P. Future ocean increasingly transparent to low-frequency sound owing to carbon dioxide emissions. Nature Geosci 3, 18–22 (2010). https://doi.org/10.1038/ngeo719
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DOI: https://doi.org/10.1038/ngeo719
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