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(The Swedish Icebreaker Oden — now home to the 80 scientists and tons of equipment of the SWERUS 2014 research expedition aimed at measuring sea floor methane release throughout the Arctic this summer. Among the scientists leading the expedition is Igor Semiletov whose 2011 expedition discovered 1 kilometer wide plumes of methane issuing from the floor of the East Siberian Arctic Shelf. Image source: Commons.)

SWERUS-C3 researchers have on earlier expeditions documented extensive venting of methane from the subsea system to the atmosphere over the East Siberian Arctic Shelf. On this Oden expedition we have gathered a strong team to assess these methane releases in greater detail than ever before to substantially improve our collective understanding of the methane sources and the functioning of the system. This is information that is crucial if we are to be able to provide scientific estimations of how these methane releases may…

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