> What is the most convincing prediction of how long until the permanent ice of Greenland melts completely?

What is the most convincing prediction of how long until the permanent ice of Greenland melts completely?

Posted at: 2015-03-12 
Assume "business as usual" greenhouse gas emissions and middle of the road scenarios for temperatures (air and ocean).

Deliberately anti-science answers are unwelcome.

The best estimates, and they are estimates, I have heard is that it would take anywhere from 500 to 1,000 years to melt all of the ice on Greenland. Perhaps even longer. A lot of Greenland's interior is below sea level, so even with the land rebounding from the lower ice mass on them, it is unlikely that all of the glacial melt will make into the oceans. Recently a canyon that is larger than the Grand Canyon was discovered near the center of the Greenland so the ice melt there will likely just result in a very large fresh water lake.

Linlyons, much of the Canadian land mass consists of the oldest rocks on the planet's surface. This rock is granite and granite is not a very good ground for growing crops. Any place in the Arctic region that would have suitable ground for growing crops would still be limited to very short growing seasons due to the sun never rising very high there. There is never a "high sun" that the most productive growing areas that exist now on the planet receive. The Arctic region may become a growing region, but it will not be a very productive growing reason as compared to what are currently our growing regions.

Added****

Miles, yes. I do know that the sun never sets for a short number of days during the summer. The sun also does not obtain a very high altitude over the horizon either. As an example - https://encrypted-tbn1.gstatic.com/image... - This means that the sun's energy has to travel through more of the atmosphere to reach the surface than does a tropical sun or even a subtropical sun. It is also true that there are short periods on the year that the arctic region receives no direct sunlight at all. ... How is that education serving you?

Just a response to some1, the growing season above the Arctic Circle maybe short in days but need I remind you that the days are 24hrs long the end of June. I sometimes think this site needs an education on their neighbor to the north.

It will probably take centuries. But I find it funny that "skeptics" say that we can't trust models, and yet tell us that we should be confident that it won't melt.

I am not able to judge which prediction is "best" I can see what is happening now.

Never. Well, never in this interglacial.

I think I recall that the ice in the center of greenland is 2 miles thick.

I'll grant that warming will occur, but I honestly don't think it'll all melt.

However, if it does, Hmmmm, will we be farming there?

The Canadian tundra, and Sibera, will be the wheat growing areas

I think 1040 The Arctic is expected to melt around that time

Assume "business as usual" greenhouse gas emissions and middle of the road scenarios for temperatures (air and ocean).

Deliberately anti-science answers are unwelcome.