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The number 'billions' depends on how high the water rises. Bangladesh and Indonesia alone are 400 million whose population are at risk.

>the most computationally challenged "climate modelers" don't claim this will happen quickly

The most crazy/aggressive models from the 1970's said we would lose half the Arctic sea ice by 2050. We hit that point two years ago. If multiple sea shelves collapse, it will indeed come as a tidal wave. We don't know what will happen but we don't have the luxury to be confident that nothing will surprise us.

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> We hit that point two years ago

Come on guys. Why do you say these things? It's literally 5 seconds away in a new browser tab. http://www.dailytech.com/Sea+Ice+Ends+Year+at+Same+Level+as+...

One time I weighed myself at 7am and I was literally 5 lbs lighter than the personal measurement I have ingrained in my head. I was on the verge of wasting away.

I paid careful attention and put together personal regulations: I must eat breakfast, I must eat lunch, I must eat dinner.

By that evening I was 1 pound lighter than my target weight. I was still a bit worried, but felt comforted to know I had averted a disaster of catastrophic proportions.

So, to put it in context, you woke up one time and lost half your weight but showed no concern because later that night you made it up again completely in carbohydrates.

"I was still a bit worried, but felt comforted to know I had averted a disaster of catastrophic proportions."

Um, in your own metaphor you would most likely be dead.

Come on guys. You're using Google to find your points instead of reading.

The fourth quarter report of the International Panel on Climate Change (IPCC) clarified we have indeed hit the 50% in a third of the time of the most aggressive estimates. The sea ice that has come back is not the same as what was there before: it's the very thin product of a single season.