A new study by Overduin et al. (IPA Action Group chair "Subsea Permafrost Mapping Data Initiative (2012-2014)") shows that methane concentrations in submarine permafrost cored in the central Laptev Sea shelf are low. The permafrost below the seabed is thawing, which releases the methane.  At this location, results show that the methane is oxidized in the unfrozen sediment above the permafrost before it reaches the water column.


Early view in JGR-Biogeosciences is available here:

http://agupubs.onlinelibrary.wiley.com/agu/jgr/journal/10.1002/%28ISSN%292169-8961/

IMGP0348_boresiteIMGP0331_tracks

​