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Huge Canyon Discovered Under Greenland Ice
cold fjord writes with this news, straight from the BBC: "One of the biggest canyons in the world has been found beneath the ice sheet that smothers most of Greenland. The canyon — which is 800km long and up to 800m deep — was carved out by a great river more than four million years ago ... It was discovered by accident as scientists researching climate change mapped Greenland's bedrock by radar. The British Antarctic Survey said it was remarkable to find so huge a geographical feature previously unseen. The hidden valley is longer than the Grand Canyon in Arizona. ... The ice sheet, up to 3km (2 miles) thick, is now so heavy that it makes the island sag in the middle (central Greenland was previously about 500m above sea level, now it is 200m below sea level)."
In theory, if all the ice on Greenland melted, how long would it take Greenland to spring back up again? I'm presuming it wouldn't be instantaneous or even noticeable to a human on Greenland at the time (well, aside from the earthquakes that would almost certainly accompany such an event,) but are we talking years, decades, centuries, or longer?
This Space Intentionally Left Blank
Is it where the Wunderland Treatymaker was test fired?
Mostly random stuff.
With a little global warming one of the world's greatest landmarks could be recovered, the sag in central Greenland would be fixed and a new source of income for Greenland could be tapped as tourists flock to this new "Grand Canyon" to go hiking, fishing, and camping.
Giant Canyon Discovered Under Greenland Ice Sheet
While flying over the ice sheet, scientists over the past three decades have measured the depths of the canyon using a radar system that operates at frequencies transparent to radio waves—from around 50 megahertz to 500 megahertz. A pulse of energy is sent down to penetrate through the ice, bounce off the bedrock, and travel back to the radar system. (Also read: "'Shocking' Greenland Ice Melt: Global Warming or Just Heat Wave?")
'Grand Canyon' of Greenland Discovered Under Ice Sheet
much of left-wing thought is a kind of playing with fire by people who don't even know that fire is hot - George Orwell
was carved out by a great river more than four million years ago
More lies straight from the pits of hell.
Obviously this super-canyon was carved during Noah's flood.
Another Win for Flood geology!
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- - You can't take something off the Internet! That's like trying to take pee out of a swimming pool.
that Greenland is called Green again?
Propaganda. Erik the Red named it that in 985 AD to get people to colonize it with him.
> It was discovered by accident as scientists researching climate change mapped Greenland's bedrock by radar.
If you discover a canyon while scanning the bedrock with radar, that isn't an 'accidental' discovery. An accidental discovery is when you're looking for a dropped contact lens and come across a canyon instead.
I should use this sig to advertise my book ISBN-13 : 978-1501515132.
The sea level rises because the stuff covering Greenland is ice. When it melts it flows into the ocean, raising sea levels. Greenland is around 2M km2, and the ice sheet is around 2km thick, so we're talking about 4 million cubic kilometers of water. Earth has around 361 sq kilometers of water, so spreading the water around the earth gives around 10 meters of ice on each meter of water, or around 9 meters of water. In other words, (1) greenland is huge, and (2) the sea level rise is purely ice flowing into sea and has nothing to do with geological changes.
Greenland rebounding does absolutely nothing because the "extra" volume is not taken out of the ocean. The water doesn't suddenly jump back up on the land.
(arctic ice melting does not affect sea levels because the weight of the ice is already displacing water. Antarctic ice and glaciers on land are in the same situation as greenland ice)