Well I am no expert, but there is google scholar. The first result searching for "siberian methane bubbles" is Walter &al. 2006 [1], furthermore a simple search for :siberian methane bubbles nasa" yields a rather interesting overview article from Nasa's Earth Observatory [2]. So while the presence of an media article not necessarily imply that there is research, in this case the article reports on an active area of study.

[1] http://www.nature.com/nature/journal/v443/n7107 /abs/nature05040.html

[2] https://earthobservatory.nasa.gov/Features/MethaneMatters/