No Arctic pack ice

How do you think history would have changed, if e.g. after last Ice Age, climate would have become so warm, that all Arctic pack ice would have melted.

Instead of Northern Sea Route and Northwest Passage, all the Arctic ocean would be open for navigating.

Let's suppose that there's less water on Earth than for real. So, sea level could be same as nowadays, even if form of Arctic pack ice would be liquid.
 
Er, this seriously changes teh climate anyways.

Long story short, if the earth is a few degrees warmer, to the point where there is no ice in the arctic ocean (and presumably around antarctica), you just radically altered pretty much every ecosystem on the planet. For instance, warmer waters means that you probably just messed up the gulf stream, causing massive cooling in western europe. This sets off a chain of events which in all likelyhood leaves us with a very different looking world.

Anyways, these sorts of climatic PODs are generally placed in ASB.
 
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