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The world has gotten stormier over the past two decades—and the reason is a mystery, a new study says.
In the past 20 years, winds have picked up around 5 percent on average.
Extremely strong winds caused by storms have increased even faster, jumping 10 percent over 20 years, according to the new analysis of global satellite data.
The study, the first to look at wind speeds across such a large swath of the planet, bolsters some earlier findings, according to study leader Ian Young, of the Swinburne University of Technology in Melbourne, Australia.
"Some regional studies had found similar results, so we suspected there may be an increasing trend," Young said.
"...pervasive seismic tremors observed around the world that arise from wind-generated waves"
“We may be observing an upward increase of something that, in the future, will go down again,” said Ian Young, a physical oceanographer at the Australian National University in Canberra. “However, the fact that we’re seeing this on a global basis in both the northern and the southern hemispheres suggests it may be a long-term trend rather than an oscillation. If we’re going to design things in the future, we may want to actually factor in oceanic waves going up.”
Winds over the oceans directly influence wave heights, and orbiting satellites use altimeters to regularly monitor both. Scientists are interested in these measurements because they affect the exchange of heat and gasses between water and sky. Winds also influence the frequency and strength of major storms.
Various studies have shown upward trends in wind speed over the last decade or two, but all of those projects have focused on limited parts of the world. Young and colleagues wanted a more global perspective.
faint tremors, called microseisms, are periodic movements of Earth's surface that can last anywhere from 5 to 30 seconds.
Unlike earthquakes, which are caused by movements of Earth's tectonic plates, microseisms are created by the incessant beating of waves along the coasts.
The phenomena are usually dismissed as background noise by scientists studying earthquake readings.
Originally posted by Ventessa
I can't remember how long ago it was, but I distinctly remember listening to a coast to coast am show about earth changes and how the wind will be blowing steadily at about 200-300 miles per hour. I wish I could remember more about the show, but it's been years...