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Grüdger, Friederike; Probandt, David; Knittel, Katrin; Carrier, Vincent; Kalenitchenko, Dimitri; Silyakova, Anna; Serov, Pavel; Ferré, Benedicte; Svenning, Mette Marianne; Niemann, Helge

Journal: Limnology and Oceanography

Mänd, Kaarel; Lalonde, Stefan V.; Paiste, Kärt; Thoby, Marie; Lumiste, Kaarel; Robbins, Leslie J.; Kreitsmann, Timmu; Romashkin, Alexander E.; Kirsimäe, Kalle; Lepland, Aivo; Konhauser, Kurt O.

Journal: Minerals

Daszinnies, Matthias Christian; Plaza-Faverola, Andreia; Sylta, Øyvind; Bünz, Stefan; Mattingsdal, Rune; Tømmerås, Are; Knies, Jochen

Journal: Marine and Petroleum Geology

Bailey, Hannah L.; Hubbard, Alun Lloyd; Klein, Eric S.; Mustonen, Kaisa-Riikka; Akers, Pete D.; Marttila, Hannu; Welker, Jeffrey M.

Journal: Nature Geoscience

Lasabuda, Amando Putra Ersaid; Johansen, Nora; Laberg, Jan Sverre; Faleide, Jan Inge; Senger, Kim; Rydningen, Tom Arne; Patton, Henry; Knutsen, Stig-Morten; Hanssen, Alfred

Journal: Earth-Science Reviews

Photo

A cautious return to the sea-ice.

Henry Patton (left), Anna Silyakova and Christine Lockwood-Ireland make their way back to the ice pack in the Greenland Sea.  Anna Silyakova was collecting ice cores from the sea ice to investigate methane-associated processes within, when the group was interrupted by a passing polar bear. They had to quickly abandon station and return to the safety of the research vessel Kronprins Haakon.

Methane is a greenhouse gas, and as it rises through the water column it gets captured within the sea-ice structure during ice formation. Although ice typically behaves as a barrier for gases to go through, sea-ice is often permeable and a great mediator of gas exchange in polar regions. Being porous, sea-ice provides paths for gases like methane to pass from the ocean surface to the atmosphere where it can make an impact on climate. So, after a polar bear break the scientists returned to the ice pack, albeit cautiously, and collected more samples.

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