Future changes in wind-wave climate have broad implications for the operation and design of coastal, near- and off-shore industries and ecosystems, and may further exacerbate the anticipated vulnerabilities of coastal regions to projected sea-level rise1,2. However, wind waves have received little attention in global assessments of projected future climate change. We present results from the first community-derived multi-model ensemble of wave-climate projections. We find an agreed projected decrease in annual mean significant wave height (HS) over 25.8% of the global ocean area. The area of projected decrease is greater during boreal winter (January–March, mean; 38.5% of the global ocean area) than austral winter (July–September, mean; 8.4%). A projected increase in annual mean HS is found over 7.1% of the global ocean, predominantly in the Southern Ocean, which is greater during austral winter (July–September; 8.8%). Increased Southern Ocean wave activity influences a larger proportion of the global ocean as swell propagates northwards into the other ocean basins, observed as an increase in annual mean wave period (TM) over 30.2% of the global ocean and associated rotation of the annual mean wave direction (θM). The multi-model ensemble is too limited to systematically sample total uncertainty associated with wave-climate projections. However, variance of wave-climate projections associated with study methodology dominates other sources of uncertainty (for example, climate scenario and model uncertainties).
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Lowe, J. A. et al. in Understanding Sea-Level Rise and Variability (eds Church, J. A. et al.) 326–375 (Wiley-Blackwell, 2011).
Hemer, M. A., Wang, X. L., Church, J. R. & Swail, V. R. Coordinating global ocean wave climate projections. Bull. Am. Meterol. Soc. 91, 451–454 (2010).
Woolf, D. K., Challenor, P. G. & Cotton, P. D. Variability and predictability of the North Atlantic wave climate. J. Geophys. Res. 107, 3145 (2002).
Hemer, M. A., Church, J. A. & Hunter, J. R. Variability and trends in the directional wave climate of the Southern Hemisphere. Int. J. Climatol. 30, 475–491 (2010).
Semedo, A., Suselj, K., Rutgersson, A. & Sterl, A. A global view on the wind sea and swell climate and variability from ERA-40. J. Clim. 24, 1461–1479 (2011).
Young, I. R., Zieger, S. & Babanin, A. V. Global trends in wind speed and wave height. Science 332, 451 (2011).
Gulev, S. K. & Grigorieva, V. Last century changes in ocean wind wave height from global visual wave data. Geophys. Res. Lett. 31, L24302 (2005).
Tokinaga, H. & Xie, S-P. Wave- and anemometer-based sea surface wind (WASWind) for climate change analysis. J. Clim. 24, 267–285 (2011).
McInnes, K. L., Erwin, T. A. & Bathols, J. M. Global climate model projected changes in 10 m wind speed and direction due to anthropogenic climate change. Atmos. Sci. Lett. 12, 325–333 (2011).
Cavaleri, L., Fox-Kemper, B. & Hemer, M. Wind-waves in the coupled climate system. Bull. Am. Meteorol. Soc. 93, 1651–1661 (2012).
Hemer, M. A., Wang, X. L., Weisse, R. & Swail, V. R. Community advancing wind-waves climate science: The COWCLIP project. Bull. Am. Meteorol. Soc. 93, 791–796 (2012).
Wang, X. L. & Swail, V. R. Climate change signal and uncertainty in projections of ocean wave heights. Clim. Dynam. 26, 109–126 (2006).
Mori, N., Yasuda, T., Mase, H., Tom, T. & Oku, Y. Projection of extreme wave climate change under the global warming. Hydrol. Res. Lett. 4, 15–19 (2010).
Hemer, M. A., Katzfey, J. & Trenham, C. Global dynamical projections of surface ocean wave climate for a future high greenhouse gas emission scenario. Ocean Modelling http://dx.doi.org/10.1016/j.ocemod.2012.09.008 (2012).
Dee, D. P. et al. The ERA-Interim reanalysis: Configuration and performance of the data assimilation system. Q. J. R. Meteorol. Soc. 137, 553–597 (2011).
Sterl, A. & Caires, S. Climatology, variability and extrema of ocean waves—The web-based KNMI/ERA-40 wave atlas. Int. J. Climatol. 25, 963–997 (2005).
Arblaster, J. M., Meehl, G. A. & Karoly, D. J. Future climate change in the Southern Hemisphere: Competing effects of ozone and greenhouse gases. Geophys. Res. Lett. 38, L02701 (2011).
Meehl, G. A. et al. The WCRP CMIP3 multi-model dataset: A new era in climate change research. Bull. Am. Meteorol. Soc. 88, 1383–1394 (2007).
Sobel, A. H. & Camargo, S. J. Projected future changes in tropical summer climate. J. Clim. 24, 473–487 (2011).
Coelho, C., Silva, R., Veloso-Gomes, F. & Taveira-Pinto, F. Potential effects of climate change on northwest Portuguese coastal zones. ICES J. Mar. Sci. 66, 1497–1507 (2009).
Timmermann, A., McGregor, S. & Jin, F-F. Wind effects on past and future regional sea level trends in the southern Indo–Pacific. J. Clim. 23, 4429–4437 (2010).
Knutti, R., Furrer, R., Tebaldi, C., Cermak, J. & Meehl, G. Challenges in combining projections from multiple climate models. J. Clim. 23, 2739–2758 (2010).
Taylor, K., Stouffer, R. & Meehl, G. A. An overview of CMIP5 and the experiment design. Bull. Am. Meteorol. Soc. 93, 485–498 (2012).
Kuriyama, Y., Banno, M. & Suzuki, T. Linkages among interannual variations of shoreline, wave and climate at Hasaki, Japan. Geophys. Res. Lett. 39, L06604 (2012).
Nicholls, R. J. et al. in IPCC Climate Change 2007: Impacts, Adaptation and Vulnerability (eds Parry, M. L., Canziani, O. F., Palutikof, J. P., van der Linden, P. J. & Hanson, C. E.) 315–356 (Cambridge Univ. Press, 2007).
Uppala, S. et al. The ERA-40 re-analysis. Q. J. R. Meteorol. Soc. 131, 2961–3012 (2005).
Tebaldi, C., Arblaster, J. M. & Knutti, R. Mapping model agreement on future climate projections. Geophys. Res. Lett. 38, L23701 (2011).
The study was conceived as part of the COWCLIP (ref. 4) project, an international collaborative working group endorsed by the World Climate Research Program and the Joint Commission on Oceanography and Marine Meteorology of the World Meteorological Organization and the UNESCO Intergovernmental Oceanographic Commission. We acknowledge the European Centre for Medium Range Weather Forecasting for the reanalysis data, and the climate modelling groups, the Program for Climate Model Diagnosis and Intercomparison (PCMDI) and the WCRP’s Working Group on Coupled Modelling (WGCM) for their roles in making available the WCRP CMIP3 multi-model data set. Support of the CMIP3 data set is provided by the Office of Science, US Department of Energy. M.A.H. acknowledges the support of the Australian Climate Change Science Programme and the CSIRO Wealth from Oceans National Research Flagship. We thank all contributors to the COWCLIP project including Arno Behrens (Helmoholtz-Zentrum Geesthacht, Germany), Lennart Bengtsson (Univ. Reading, UK), Heinz Gunther (HZG), Isaac Held (GFDL, USA), Jack Katzfey (CSIRO, Australia), Shian-Jiann Lin (GFDL), Hajime Mase (Kyoto University), Yuichiro Oku (KU), Andreas Sterl (KNMI, The Netherlands), Val Swail (Env. Canada), Tracey Tom (KU), Claire Trenham (CSIRO, Australia), Ralf Weisse (HZG) and Tomohiro Yasuda (KU). We also thank J. Church for comments on an earlier version of the manuscript.
The authors declare no competing financial interests.
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Hemer, M., Fan, Y., Mori, N. et al. Projected changes in wave climate from a multi-model ensemble. Nature Clim Change 3, 471–476 (2013). https://doi.org/10.1038/nclimate1791
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