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Canadian Arctic Glacier Melt


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#16    Frank Merton

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Posted 19 March 2013 - 07:47 AM

I think we are warming the earth, but I don't think it's something to panic over.


#17    Ashotep

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Posted 19 March 2013 - 11:41 PM

By the time it gets so bad we do panic it might be too late.  The oceans wouldn't have to warm up much before we had a mass methane release.  They think that is what caused the Permian extinction, at least it was a big part of it and it almost wiped everything out.


#18    Br Cornelius

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Posted 20 March 2013 - 09:12 AM

The fact that land based Arctic glaciers are in such dramatic retreat is a very bad sign. The loss of summer sea ice shows a clear trend, but could theoretically recover almost completely in a decade or less. The land based glaciers are much more resistant and have not been in such a state of retreat for thousands of years and would take a considerable amount of time to recover. They are really the Canary in the coal mine of climate change. This is all happening because climate change is concentrating in the high latitudes and the arctic circle especially with mean temperature increases of 2-3C, which is about three times the temperature rise of the whole planetary system.

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#19    CRYSiiSx2

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Posted 20 March 2013 - 09:33 AM

Yeah and Dinosaur farts could have warmed up the Earth too.

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#20    AsteroidX

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Posted 20 March 2013 - 09:41 AM

Sometimes a video can say it much better then any words I could ever come up with. I give credit to the many brilliant minds that we coexist with:





#21    Ashotep

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Posted 21 March 2013 - 01:14 AM

A video always explains it the best.  The horses running along the beach were beautiful and so is Mother Earth, hope she stays that way.


#22    shaddow134

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Posted 21 March 2013 - 05:09 AM

The Warm up of the Artic is indeed real and spells doom for species such as the polar bear,who are specifically adapted for Artic conditions.

Edited by shaddow134, 21 March 2013 - 05:09 AM.

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#23    Frank Merton

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Posted 21 March 2013 - 05:27 AM

Every species takes millions of years to evolve, so its loss represents a huge amount of evolution gone down the tubes.  Still, the vast majority of all species that have existed are extinct, and, until we came along, one of the most common causes of extinction was specialization -- becoming highly adapted to something in the environment that disappears when the environment changes.

Natural selection normally selects in favor of creatures that do a particular job better than others, so that the animal become better and better at it.  This necessarily is at the cost of the ability to do other jobs as well.  Two species competing in the same niche will either result in one becoming extinct or the two evolving specialties -- dividing the niche into smaller niches where each can specialize.

Polar bears are highly specialized to hunting in the arctic, in particular on the arctic sea ice. They appear to be doomed, although of course people will work on ways of saving them, if nothing else in modern zoos where they live full lives.

I'm not sure this bothers me much, except as a signal that things are not as they should be.  The animals are the only mammalian predator known to actively hunt human beings.  They also, as bears go, do not seem to have much sense, repeatedly getting themselves into trouble where other bears quickly learn.





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