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Scientific Cruise Meets Perfect Storm, Inspires Extreme Wave Research
An anonymous reader writes "The oceanographers aboard RRS Discovery were expecting the winter weather on their North Atlantic research cruise to be bad, but they didn't expect to have to negotiate the highest waves ever recorded in the open ocean. Wave heights were measured by the vessel's Shipborne Wave Recorder, which allowed scientists from the National Oceanography Centre to produce a paper titled 'Were extreme waves in the Rockall Trough the largest ever recorded?' It's that paper, in combination with the first confirmed measurement of a rogue wave (at the Draupner platform in the North Sea), that led to 'a surge of interest in extreme and rogue waves, and a renewed emphasis on protecting ships and offshore structures from their destructive power.'"
I only RTFAs to find out how high the waves were - it turns out they were up to 29.1 meters (95.5 feet).
"False hope is why we'll never run out of natural resources!" - Lewis Black
The article was published in 2006. How is this 'new?'
look up Schrodinger wave equations and apply them to ocean waves. You will get 30+ meter tall waves with a trough next to the "wall" of water, (the wave is tall and narrow - like a wall). This trough adds to the great difficulty in surviving one of these waves. Ships that are designed to withstand forces of 10 tons/m2 have to content with 10 times that force. I believe there was a study in which someone, (don't remember her name :( ) mapped the entire earth over a two week period and found something on the order of 20 of these waves. Fascinating stuff.
Under severe gale force conditions with wind speeds averaging 21 ms a shipborne wave recorder measured individual waves up to 29.1 m from crest to trough, and a maximum significant wave height of 18.5 m.
Can you convert that to the slashdot standard unit of measurement, Libraries of Congress? Also, if you could provide a car analogy too that would be great. Thanks!
#fuckbeta #iamslashdot #dicemustdie
0.59 Libraries of Congress from fender to fender.
Their may be a grammatical error, misspeling, or evn a typo in this post.
TFA is talking about waves in the open ocean, though. Waves get higher when they reach shallower water, so the 20 m waves you're talking about would have been significantly smaller in the open ocean -- which makes 29 m open ocean waves that much more impressive.
....... it didn't happen!! :D
Yeah, the authors were probably diluted.
Sheesh, evil *and* a jerk. -- Jade
Not at all.
The guys up on deck thought they were looking at rough seas, but down below... well, when the boat starts a rockin' don't come a knockin', if you get my drift.
The Tasman sea is notorious for rouge waves. Many moons ago I worked a fishing trawler in Bass Straight, I never saw anything like 120ft but the regular waves were tall enough that the radar was blocked by the peaks when the boat was in a trough, I'm guessing the radar mast was about 30ft above the water line. A lot like riding in a giant roller coaster carriage really, slowly climb up one wave, crest, then race down the other side and watch the bow dig under the next one, throw the water over the wheel house as the bow pops up to the surface, and starts the next climb. From what I've heard, the problem with rouge waves is not so much their height but the fact that they are too steep to climb.
And did you exchange a walk on part in the war for a lead role in a cage? - Pink Floyd.
My uncle retired as a US Navy Captain. For many years he had two photographs displayed in his house, which he ascribed to Admiral "Bull" Halsey's "second" typhoon, in June 1945. At that time my uncle was an ensign, assigned to a destroyer, and on his first sea voyage.
The two photographs were of a sister destroyer. In the first photograph, all one sees is a giant wave, with the bow of the destroyer sticking out of one side, and the stern sticking out of the other. The middle of the ship, including the masts and superstructure, is submerged and not visible.
In the second photo, taken a few seconds later, the middle of the ship is now visible, but both the bow and stern are now submerged in the wave train. And as a kid, the part that fascinated me the most: You could see an air gap below the middle of the ship, between the ship's keel and the wave trough below.