Scientists prepare for largest ever Arctic expedition

Researchers from more than a dozen countries are preparing to launch the biggest and most complex largest ever Arctic expedition ever attempted in the central Arctic – a year-long journey through the ice they hope will improve the scientific models that underpin our understanding of climate change.

Scientists prepare for largest ever Arctic expeditionIn the €140m (£123m) Mosaic expedition, 600 scientists from 19 countries including Germany, the US, Britain, France, Russia and China will work together in one of the most inhospitable regions of the planet.

“The Arctic is the epicentre of global climate change,” said Markus Rex of Germany’s Alfred Wegener Institute for Polar and Marine Research, who will lead the expedition. “At the same time the Arctic is the region of the planet where we understand the climate system least.”

Packed full of scientific equipment, the German icebreaker RV Polarstern will leave the port of Tromsø in northern Norway accompanied by a Russian vessel to search for a suitably large ice floe on which to anchor and set up base.

As the days get shorter and the sea freezes around it, the Polarstern will slowly drift off on its own towards the North Pole while rotating teams of 100 scientists spend two months each conducting research on the ice.

Stefanie Arndt, a sea ice physicist who will join the mission in mid-February, said the unique advantage of this expedition compared with others was that researchers would be able to observe processes in the Arctic across an entire cycle of seasons.

“What’s particularly interesting is the transition from winter to spring,” she said, a time when the ice is normally too thick for ships to reach the central Arctic.

Recording changes in the density, size and type of snow will help scientists better understand the flows of energy in the Arctic. “For example, how much light the snow reflects back into the atmosphere, how much it absorbs and how much light reaches the upper ocean,” said Arndt. “This has big implications for the ecosystem.”