Arctic ice cap could melt by 2070, Russia warns

[seven]

A Russian parliamentary committee has warned that the Arctic ice cap may be gone by 2070, wiping out animal species and displacing the region's indigenous people.

Arctic ice cap could melt by 2070, Russia warns - ABC News (Australian Broadcasting Corporation)

[dennisanderton]

60 years is a bit far to pose much threat for us to take initiative. However there are currently undeniable terrible manifestations of climate change. Scary enough to for all us to take action right away.

[prashamk]

Wasn't there some report that said that Arctic would be Ice Free this year itself?

[forfismum]

was it not so for a time last year? anyway I have seen reports that it will be permanently open by 2050,any advance on that? should we book our holidays there for say......2035?

[prashamk]

I was wondering about some info on water and ice.

Is there any comparison between volume of Water and Ice? I would like to know if liquid and solid (ice) forms of H2O have same volume. Any guidance from experts?

[wardengineering]

One of my partners built the first geothermal generating plant north of the Geysers in California. He is an expert on water because of the need to know the age and source of the water taken from the ground water below used by the plant. He states the water changes density as it becomes purer by freezing. The more times it is thawed and then frozen the more pure it becomes. Some of the ice in Polar Regions are so cold and pure that it becomes as hard as steel. When brought to the surface by breaking from below as with an ice breaker, for example, it exfoliates and when heat is applied it sublimates to vapor without going through a water stage. Whether there is any data to support this is problematical since, according to my partner, the information was classified by the Navy. This suggests there may not be any water to raise the ocean levels except by rainfall and runoff. In addition, sublimation is a two way street: the vapor can go directly to ice under certain temperature conditions.

[prashamk]

Originally Posted by wardengineering

...........Whether there is any data to support this is problematical since, according to my partner, the information was classified by the Navy. This suggests there may not be any water to raise the ocean levels except by rainfall and runoff. In addition, sublimation is a two way street: the vapor can go directly to ice under certain temperature conditions.

There goes a sixer. Great data

[spadlet]

Originally Posted by wardengineering

This suggests there may not be any water to raise the ocean levels except by rainfall and runoff. In addition, sublimation is a two way street: the vapor can go directly to ice under certain temperature conditions.

Would the purity of the vapour not decrease if it is released into the atmosphere?

[SwitchBlade]

Originally Posted by prashamk

I was wondering about some info on water and ice.

Is there any comparison between volume of Water and Ice? I would like to know if liquid and solid (ice) forms of H2O have same volume. Any guidance from experts?

The reason ice floats is because it is less dense than water. It is one of the few (if not the only) compounds(?) that gets less dense when it goes from a liquid form to a solid form. However, all of the ice/water that makes up the arctic ice cap is already in the ocean. Therefore, as it melts it won't change the ocean's water level. You can check this by filling a glass with ice (not above the rim), then adding water to float the ice. Mark the water level. Let the ice melt. Observe the water level.

The concern about global warming raising ocean water levels is based on the ice cap on Greenland (mostly) with a little added from Siberia and maybe northern Canada melting. This ice/snow cap is on land and the runoff will ADD water to the oceans.