Wind over open water makes waves. Never much of an issue in the Arctic Ocean before, but now...

Scientists had never measured waves in the Beaufort Sea, an area north of Alaska, until recently. Permanent sea ice cover prevented their formation. But much of the region is now ice-free by September, and researchers were able to anchor a sensor to measure wave heights in the central Beaufort Sea in 2012.

http://news.nationalgeographic.com/news/2014/07/140730-arctic-wave-height-sea-ice-climate-change-science/

As the ice goes, so does the permafrost. Have you seen the soil craters forming in Siberia?

http://www.telegraph.co.uk/news/worldnews/europe/russia/11016418/Has-Siberia-crater-mystery-been-solved.html

and

http://www.nature.com/news/mysterious-siberian-crater-attributed-to-methane-1.15649

Methane, a far more potent greenhouse gas, is also sublimating from the seafloor:

It has recently been documented that a tongue of relatively warm Atlantic water, with a core at depths of 200-600 [meters] may have warmed up some in recent years," Gustafsson explained. "As this Atlantic water, the last remnants of the Gulf Stream, propagates eastward along the upper slope of the East Siberian margin, our SWERUS-C3 program is hypothesizing that this heating may lead to destabilization of upper portion of the slope methane hydrates. This may be what we now for the first time are observing."

The researchers are quick to point out that they are just a few weeks into their work, and this is a very much speculation. However, the very fact that these plumes are there is worrying enough.

"If even a small fraction of Arctic sea floor carbon is released to the atmosphere, we're f'd,"

http://www.natureworldnews.com/articles/8401/20140805/fd-methane-plumes-seep-frozen-ocean-floors.htm

We may be past the point of no return.

[youtube]iFWtsT5zRKo[/youtube]

Uh, sorry 'bout that, couldn't resist a cheesy 1970's video.