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Alexey Portnov, Andrew J. Smith, Jürgen Mienert, Georgy Cherkashov, Pavel Rekant, Peter Semenov, Pavel Serov and Boris Vanshtein Offshore permafrost decay and massive seabed methane escape in water depths >20 m at the South Kara Sea shelf Geophysical Research Letters 40

Version of Record online: 1 AUG 2013 | DOI: 10.1002/grl.50735

Key Points

  • Seafloor gas expulsion is widespread at the South Kara Sea shelf
  • Gas expulsion is limited approximately to water depths >20 m
  • A sub-seabed permafrost cap may prevent gas migration in water depths < 20 m

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