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Walter Munk's Astonishing Wave-Tracking Experiment
An anonymous reader writes in with a look at a scientist's interesting wave-tracking experiment and the incredible journeys that waves make. His name is Walter Munk, now in his 90s and a professor emeritus at the Scripps Institution of Oceanography in La Jolla, California. About 60 years ago, he was anchored off Guadalupe Island, on Mexico's west coast, watching swells come in, and using an equation that he and others had devised to plot a wave's trajectory backward in time, he plotted the probable origins of those swells. But the answer he got was so startling, so over-the-top improbable, that he thought, "No, there must be something wrong." His equations said that the swells hitting beaches In Mexico began some 9,000 miles away — somewhere in the southern reaches of the Indian Ocean, near Antarctica. "Could it be?" he wrote in an autobiographical sketch. Could a storm half way across the world produce a patch of moving water that traveled from near the South Pole, up past Australia, then past New Zealand, then across the vast expanse of the Pacific, arriving still intact – at a beach off Mexico? He decided to find out for himself. That is why, in 1957, Walter Munk designed a global, real life, wave-watching experiment.
... making waves.
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http://www.surfline.com/surf-s...
Two somewhat informative videos here - it's the best I got in a quick google.
"Windows is like the faint smell of piss in a subway: it's there, and there's nothing you can do about it." - Charlie Br
Only at low amplitudes, for waves in water. At higher amplitudes non-linear effects become significent. The same applies to sound, and electromagnetic radiation in any medium other than vacuum. You don't see it much because the required amplitudes for that to happen in air are at the retina-scorching level.
Could a storm half way across the world produce a patch of moving water that traveled from near the South Pole
This reads like the voice-over for one of those embarrassingly poor 'documentaries' you sometimes see, where the producers have tried to sensationalize a fairly standard, scientific subject, and draw it out to fill a whole hour, when it could have been adequately explained in about 10 minutes. A shame, really, because the subject is in fact quite interesting.
However: waves don't move patches of water half-way around the globe; the actual water more or less stays in place. A wave is simply energy propagating through a medium, and it is quite astonishing to hear that an ocean wave can travel that far without dissipating, because the expectation is that it would spread out in a circular pattern and thus grow weaker with distance. I would have been interested in hearing what the explanation is.
Because Slashdot.
I want to delete my account but Slashdot doesn't allow it.
Waves isn't a physical thing that propagate over the seas.
A wave denier!
I don't believe those exist.
"I think this line is mostly filler"
Only at low amplitudes, for waves in water. At higher amplitudes non-linear effects become significent. The same applies to sound, and electromagnetic radiation in any medium other than vacuum. You don't see it much because the required amplitudes for that to happen in air are at the retina-scorching level.
You've apparently never seen Motörhead live.
:) it's probably thanks to this kooky old man gazing at the sea that this is "common knowledge". his experiments ran in the 70s.