Yet another global warming positive feedback

Real interesting science here - first-year ice is thinner than multi-year ice, I would think (obviously), so that it would make sense that more sunlight penetrates a layer of first-year ice, causing more warming of the ocean water under the first-year ice, as compared to the water under multi-year ice.

But even though that's an obvious supposition, in order to prove that is actually the case, you have to make measurements.  And that's what these intrepid Arcticologists did.

Light absorption speeding Arctic ice melt

Yet another indication we are on a very hard course to reverse unless we come up with a way to cut emissions drastically and start augmenting sinks for carbon.

Cutting emissions drastically = more nuclear power. Especially in a power-hungry world.