Waves are increasingly stronger as a consequence of climate change

University of California – Santa Cruz Read ScienceDaily article here

Borja G. Reguero, Iñigo J. Losada, Fernando J. Méndez. A recent increase in global wave power as a consequence of oceanic warmingNature Communications, 2019; 10 (1) DOI: 10.1038/s41467-018-08066-0

Sea level rise puts coastal areas at the forefront of the impacts of climate change, but new research shows they face other climate-related threats as well. Scientists found that the energy of ocean waves has been growing globally, and they found a direct association between ocean warming and the increase in wave energy.

A wide range of long-term trends and projections carry the fingerprint of climate change, including rising sea levels, increasing global temperatures, and declining sea ice. Analyses of the global marine climate thus far have identified increases in wind speeds and wave heights in localized areas of the ocean in the high latitudes of both hemispheres. These increases have been larger for the most extreme values (e.g., winter waves) than for the mean conditions. However, a global signal of change and a correlation between the localized increases in wave heights and global warming had remained undetected….

….While the study reveals a long-term trend of increasing wave energy, the effects of this increase are particularly apparent during the most energetic storm seasons, as occurred during the winter of 2013-14 in the North Atlantic, which impacted the west coast of Europe, or the devastating 2017 hurricane season in the Caribbean, which offered a harsh reminder of the destructive power and economic impacts of coastal storms.

The effects of climate change will be particularly noticeable at the coast, where humans and oceans meet, according to coauthor Fernando J. Méndez, associate professor at Universidad de Cantabria. “Our results indicate that risk analysis neglecting the changes in wave power and having sea level rise as the only driver may underestimate the consequences of climate change and result in insufficient or maladaptation,” he said.


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