An accelerating trend is an invitation to do all kind of weird math to anticipate the future. I'm no exception, so here you go: The PIOMAS June data was just released stating Ice volume for March 2012 and 2011 was ~20,800 km³. That's the orange line on the left.

Now the data also tells three month later a lot of ice was already lost and the loss is approximately 1000 km³ greater than the year before. It would be interesting to know who provides an extra energy of 3x10e20 Joules to melt the ice, but that's another story. Let's assume for now the trend continues and every year an additional cube of ice with an edge length of 10km disappears. What's the math?

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