Offshore permafrost decay and massive seabed methane escape in water depths >20 m at the South Kara Sea shelf (2013)

http://onlinelibrary.wiley.com/doi/10.1002/grl.50735/abstract

Alexey Portnov, Andrew J. Smith, Jürgen Mienert, Georgy Cherkashov, Pavel Rekant, Peter Semenov, Pavel Serov and Boris Vanshtein.