ArcOP 2022

On behalf of the European Consortium for Ocean and Research Drilling, ECORD, the Swedish Polar Research Secretariat will coordinate a complex, international research expedition where the goal is to recover a complete stratigraphic sedimentary record to provide a continuous, long-term history of the climate of the central Arctic Ocean. This will be a critical key to unlocking our understanding of the processes shaping global climate change.

The Arctic Ocean Paleoceanography research expedition, ArcOP, which will take place from August to September 2022, is a follow-up to the successful ACEX expedition, which was carried out in 2004 and coordinated by the Polar Research Secretariat. Many Swedish polar researchers participated and the expedition marked the start of a new era in Arctic climate exploration.

The ArcOP expedition will represent another step-change in reconstructing the historical climate change in the Arctic. The sediment cores that will be collected will play an important role in the understanding of the sensitivity of the earth’s climate system with regard to various parameters, such as carbon dioxide. In this way, it will be possible to predict future climate change with better reliability, at both regional and global levels. The international research group, which includes Swedish researchers, is led by professors Ruediger Stein at the University of Bremen in Germany and Kristen St. John at James Madison University in the United States.

During the expedition, marine sediment cores will be collected from locations on the southern Lomonosov Ridge in the Arctic Ocean. This is being done with the help of a scientific drilling vessel at the same time as two icebreakers keep ice floes away in the area, one of these is the Swedish icebreaker Oden.

Time plan

The research expedition will be carried out for just over seven weeks from August to September 2022.


Northern Arctic Ocean, southern Lomonosov Ridge.

Co-Chief Scientists

Professor Ruediger Stein, University of Bremen, Germany

Professor Kristen St. John, James Madison University, USA


The Swedish Polar Research Secretariat coordinates the research expedition on behalf of the European Consortium for Ocean and Research Drilling, ECORD. The research expedition is carried out within the International Ocean Discovery Program, IODP, which is part of ECORD. IODP is an international marine research program supported by 23 countries. The Swedish Polar Research Secretariat collaborates with Arctic Marine Solutions in the implementation and with the Swedish Maritime Administration for the use of the icebreaker Oden.

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Last modified: 17 February 2021