Originally published as: Overduin, P. P., Liebner, S., Knoblauch, C., Günther, F., Wetterich, S., Schirrmeister, L., Hubberten, H.-W., Grigoriev, M. N. (2015): Methane oxidation following submarine permafrost degradation: Measurements from a central Laptev Sea shelf borehole. - Journal of Geophysical Research, 120, 5, p. 965-978. DOI: http://doi.org/10.1002/2014JG002862 PUBLICATIONS Journal of Geophysical Research: Biogeosciences RESEARCH ARTICLE Methane oxidation following submarine permafrost 10.1002/2014JG002862 degradation: Measurements from a central Key Points: Laptev Sea shelf borehole • Submarine permafrost cored in the central Laptev Sea shelf is low Pier Paul Overduin1, Susanne Liebner2, Christian Knoblauch3, Frank Günther1, Sebastian Wetterich1, in methane 1 1 4 • Degrading submarine permafrost Lutz Schirrmeister , Hans-Wolfgang Hubberten , and Mikhail N. Grigoriev releases methane during thaw 1 2 • Methane is oxidized in unfrozen Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Potsdam, Germany, GFZ German Research sediment before it reaches the Centre for Geosciences, Potsdam, Germany, 3Institute of Soil Science, Center for Earth System Research and Sustainability, water column Universität Hamburg, Hamburg, Germany, 4Siberian Branch, Russian Academy of Sciences, Mel’nikov Permafrost Institute, Yakutsk, Russia Correspondence to: Abstract Submarine permafrost degradation has been invoked as a cause for recent observations P. P. Overduin,
[email protected] of methane emissions from the seabed to the water column and atmosphere of the East Siberian shelf. Sediment drilled 52 m down from the sea ice in Buor Khaya Bay, central Laptev Sea revealed unfrozen sediment overlying ice-bonded permafrost. Methane concentrations in the overlying unfrozen sediment Citation: Overduin, P. P., S. Liebner, C.