Great news to hear, heading into the weekend - this article says Global Warming Past the Point of No Return.

Lovely.

It's all about the sea ice - and how the sea ice is disappearing rapidly.

"Sea ice keeps a cap on frigid water, keeping it cold and protecting it from heating up. Losing the sea ice of the Arctic is likely to have major repercussions for the climate, he said. "There could be dramatic changes to the climate of the northern region due to the creation of a vast expanse of open water where there was once effectively land," Professor Wadhams said. "You're essentially changing land into ocean and the creation of a huge area of open ocean where there was once land will have a very big impact on other climate parameters," he said."

That doesn't sound good. 
"The greatest fear is that the Arctic has reached a "tipping point" beyond which nothing can reverse the continual loss of sea ice and with it the massive land glaciers of Greenland, which will raise sea levels dramatically."

Hmm.

As I live on a city surrounding on three sides by water, I will be paying attention to these things...