Danger from the deep

It's funny how you know something passively but don't *realize* it actively sometimes, isn't it?  I know that if warm water runs UNDERNEATH ice, it will melt the ice from below, but it never occurred to me - never HIT me - that that would apply to the polar ice sheets.

Stupid, really.  But there it is.  I've been thinking of atmospheric warming as how ice melts - but in fact, there's the additional problem of warmer-than-normal water flowing beneath them and adding to the rate of melt!

Here's a link to NASA's Global Climate Change page where they address the issue - with video!

We're meeeelllllltingggg!