Researchers on the world’s biggest mission to the North Pole yesterday returned to Germany, bringing home devastating proof of a dying Arctic Ocean and warnings of ice-free summers in just decades.
The German Alfred Wegener Institute’s Polarstern ship returned to the port of Bremerhaven after 389 days spent drifting through the Arctic trapped in ice, allowing scientists to gather vital information on the effects of global warming in the region.
“I have waited for this moment for so long that my heart is palpitating. The ship is now back,” institute director Antje Boetius said from on board another ship accompanying the research vessel back to port.
Ahead of their return, mission leader Markus Rex said the team of several hundred scientists from 20 countries have seen for themselves the dramatic effects of global warming on ice in the region considered “the epicenter of climate change.
“We witnessed how the Arctic ocean is dying,” Rex said. “We saw this process right outside our windows, or when we walked on the brittle ice.”
Underlining how much of the sea ice has melted away, Rex said the mission was able to sail through large patches of open water, “sometimes stretching as far as the horizon.”
“At the North Pole itself, we found badly eroded, melted, thin and brittle ice,” he said.
If the warming trend in the North Pole continues, then in a few decades we would have “an ice-free Arctic in the summer,” Rex said.
The researchers’ observations have been backed up by US satellite images showing that this year, sea ice in the Arctic reached its second-lowest summer minimum on record, after 2012.
The mission — the Multidisciplinary drifting Observatory for the Study of Arctic Climate — spent more than a year collecting data on the atmosphere, ocean, sea ice and ecosystems to help assess the impact of climate change on the region and the world.
To carry out the research, four observational sites were set up on the sea ice in a radius of up to 40km around the ship.
The researchers collected water samples from beneath the ice during the polar night to study plant plankton and bacteria and better understand how the marine ecosystem functions under extreme conditions.
The 140 million euro (US$165 million) expedition is also bringing back 150 terabytes of data and more than 1,000 ice samples.
“The expedition will, of course, produce results on many different levels,” Rex said.
The team measured more than 100 parameters almost continuously throughout the year and are hoping the information would provide a “breakthrough in understanding the Arctic and climate system,” he said.
“For us the second phase is starting — the analysis of data. A lot of data has returned with the ship and we will likely be busy with it over the next 10 years,” sea ice physicist Thomas Krumpen said.
The aim is to develop models to help predict what heatwaves, heavy rains or storms could look like in 20, 50 or 100 years’ time.
Since the ship departed from Tromso, Norway, on Sept. 20 last year, the crew have seen long months of complete darkness, temperatures as low as minus-39.5oC — and more than 60 polar bears.
A shot had to be fired to warn off a polar bear that came too close.
However, the bigger threat was the COVID-19 pandemic in the spring, which left the crew stranded at the North Pole for two months.
A multinational team of scientists was due to fly in as part of a scheduled relay to relieve those who had already spent several months on the ice, but the plan had to be redrawn when flights were cancelled across the world as governments scrambled to halt the spread of the novel coronavirus.
During the course of the expedition, a rotating crew of 300 researchers spent time on board the German ship as it traveled with the ice along a wind-driven route known as the transpolar drift.
Radiance Calmer, a researcher at the University of Colorado who was on board the Polarstern from June to last year, said that stepping out onto the ice was a “magical” moment.
“If you concentrate, you can feel it moving,” she said
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