I hadn't known about the [new observation of methane bubbling up from methane hydrates on the sea floor](http://www.su.se/english/research/leading-research-areas/science/swerus-c3-first-observations-of-methane-release-from-arctic-ocean-hydrates-1.198540). However, it doesn't seem at all surprising, given that in 2011 people discovered lots of methane bubbling up through the Arctic ocean. Where else could it come from?

(Folks who don't know about that can read [Melting permafost (part 1)](http://johncarlosbaez.wordpress.com/2011/12/14/melting-permafrost-part-2/).)

I would like to know what new information is being discovered. Here's something from the first link here:

> Örjan Gustafsson thinks that the mechanism behind the presence of methane seeps at these depths may have something to do with the ”tongue” of relatively warm Atlantic water, presumably intruding across the Arctic Ocean at 200-600 m depths. "Some evidence have shown that this water mass has recently become warmer. As this warm Atlantic water, the last remnants of the Gulf Stream, propagates eastward along the upper slope of the East Siberian margin, it may lead to destabilization of methane hydrates on the upper portion of the slope. This may be what we are now seeing for the first time,” writes Örjan Gustafsson.

I guess some of you may have seen the business about methane and that [mysterious crater in Siberia](https://plus.google.com/u/0/117663015413546257905/posts/9SxJJFRLKe1).

It's about time for another post on melting permafrost... if anyone else wants to write one, that'd be great.