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Antarctica's continental shelf sits at a depth of about 400 meters.

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phantom power Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Jul-20-08 01:16 PM
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Antarctica's continental shelf sits at a depth of about 400 meters.
I learned this from a recent article in American Scientist, about climate change and the Antarctic Peninsula (which I recommend highly).

That's about 200 meters deeper than any other continental shelf. How is that? Because the weight of the ice pushed the entire continent down 200 meters.

I wonder what happens when an entire continent experiences a hydrostatic rebound of 200 meters?
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exothermic Donating Member (570 posts) Send PM | Profile | Ignore Sun Jul-20-08 01:20 PM
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1. ah, that depends on the rebound velocity!
;-)
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phantom power Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Jul-20-08 01:34 PM
Response to Reply #1
2. Indeed...
If Antarctica loses its ice, I feel pretty sure it would be nearly instantaneous, geologically speaking. A thousand years, or less. And, obviously, it would not need to be all of it. 5 or 10 percent would be plenty.
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Enthusiast Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Jul-20-08 02:01 PM
Response to Reply #2
3. Geologists say the Great lakes region
Is still rebounding from the weight of glacial ice. The accounts for the common small earthquakes in surrounding states.
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tom_paine Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Jul-20-08 05:51 PM
Response to Original message
4. By the time that happens, the shit will have already hit the fan long before...
Edited on Sun Jul-20-08 05:55 PM by tom_paine
This is just speculation based on personal study, but I am no climatologist.

However, from what I have read it would seem that the melting of the East Antarctica Ice Shelf is coming at the "very end" and may even be centuries away from fully melting, the dreaded faster-than-expected notwithstanding.

One would have to assume there is going to be a certain amount of delay between the melting of the first half and even the later on second half of the EA Ice Shelf and this rebounding of the undersea shelf to it's original height.

In any case, it is my opinion that by the time this shelf begins rising, the effects of climate change and warming on the Earth' surface will be havoc and have been so for decades.

There is still the possibility, however small, that global warming will not be as rapid or severe at it now appears and those we term "deniers" are in fact partially or fully correct.

Not very likely. At this point, given the evidence, the new discoveries of global positive feedback loops, the rapid melting and this most recent fracturing of the Wilkins Ice Shelf a fully 10-20 years faster than expected, I would personally guess we are down in the 1 in 50 or 1 in 100 range for the deniers being partially or fully correct.
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jpak Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Jul-20-08 05:57 PM
Response to Original message
5. The cities of The Old Ones will emerge
and they will once again rule the Earth...

:evilgrin:
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phantom power Donating Member (1000+ posts) Send PM | Profile | Ignore Mon Jul-21-08 11:15 AM
Response to Reply #5
7. I used to assume the return of the Old Ones would be the worst possible outcome.
These days, I've decided to keep my options open.
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DCKit Donating Member (1000+ posts) Send PM | Profile | Ignore Mon Jul-21-08 08:08 AM
Response to Original message
6. Greenland as well. Boing, boing, boing. n/t
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