Unprecedented Hole Appears in Polar Ice
The thinning of the north polar cap has been a concern of scientists for years, but this summer it appears that the ice is thinning fastest at its center, right around the pole itself. This is unexpected and unprecedented and could lead to an ice-free arctic much sooner than expected. Most scientists did not expect such an event to take place for another 10 to 30 years. The more open ocean there is over the arctic, the less heat is reflected and the more methane is released from underwater methane hydrates and melting permafrost. Methane is 30 times more efficient a heat trap than CO2.read more