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Projected changes in wave climate from a multi-model ensemble
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
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2013 (English)In: Nature Climate Change, ISSN 1758-678X, Vol. 3, no 5, 471-476 p.Article in journal (Refereed) Published
Abstract [en]

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 rise(1,2). 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 (H-S) 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 H-S 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 (T-M) over 30.2% of the global ocean and associated rotation of the annual mean wave direction (theta(M)). 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).

Place, publisher, year, edition, pages
2013. Vol. 3, no 5, 471-476 p.
National Category
Natural Sciences
URN: urn:nbn:se:uu:diva-203679DOI: 10.1038/NCLIMATE1791ISI: 000319402000012OAI: oai:DiVA.org:uu-203679DiVA: diva2:637446
Available from: 2013-07-18 Created: 2013-07-17 Last updated: 2013-07-18Bibliographically approved

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