The expedition Arctic Ocean 2025, report 1: Releasing one of the first radiosoundings

The expedition Arctic Ocean 2025, with the research school on the Arctic climate system, is now well under way. We left Longyearbyen last Sunday August 10 under clear-blue skies and sunshine and this stayed with us through yesterday. Late last night we saw the first ice rather far north, and now were continuing north in ice and fog, as is usual along the ice edge this time of the year.

Student releasing big white balloon in the air. Blue water and blue sky

Research School student Luise Schulte releasing one of the first radiosoundings under supervision of mentor Ian Brooks. Photo: Michael Tjernström, MISU.

The research school has also started with the first sets of lectures and the work packages have also gotten their started with their work in varying degrees dependent on type of activity. The meteorological program is now fully functional since the sounding program started at noon yesterday, the remote sensing (radar and radiometer) was turned on last night and the instrumented mast at the bow of Oden was erected this morning.

(Michael Tjernström, 12 August 2025)

View from research icebreaker Oden in the morning of 12 August: fog and melting sea ice! Photo: Michael Tjernström.

The icebreaker Oden has set sail and is heading for the Arctic to map the seabed. On board are 18 PhD students from various countries attending a research school where practical work is combined with lectures. Follow their journey in our blog, with weekly reports by Michael Tjernström, professor emeritus of meteorology at Stockholm University with extensive experience of Arctic expeditions, and responsible for the research school.

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The AO25 blog: The expedition Arctic Ocean 2025

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Last updated: August 12, 2025

Source: MISU

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