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Kalenitchenko, Dimitri; Peru, Erwan; Galand, Pierre E.

Journal: Scientific Reports

Behera, Padmasini; Tiwari, Manish; Knies, Jochen

Journal: Paleoceanography and Paleoclimatology

Irvine-Fynn, Tristram D.L.; Edwards, A.; Stevens, I.T.; Mitchell, A.C.; Bunting, P.; Box, J.E.; Cameron, K.A.; Cook, J.M.; Naegeli, K.; Rassner, S.M.E.; Ryan, J.C.; Stibal, M.; Williamson, C.J.; Hubbard, Alun Lloyd

Journal: Nature Communications

Pienkowski, Anna; Husum, Katrine; Belt, Simon T.; Ninnemann, Ulysses S; Köseoğlu, Denizcan; Divine, Dmitry V; Smik, Lukas; Knies, Jochen; Hogan, Kelly; Noormets, Riko

Journal: Communications Earth & Environment

Guerrero-Cruz, Simon; Vaksmaa, Annika; Horn, Marcus A.; Niemann, Helge; Pijuan, Maite; Ho, Adrian

Journal: Frontiers in Microbiology

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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