Pushing the Boundaries of Polar Science: A Wind-Powered Expedition Reveals New Insights into Antarctica
For three months, glaciologist Heidi Sevestre and explorer Matthieu Tordeur traversed Antarctica, covering 3,914 kilometers using kite-skiing – a method relying solely on wind power. Their journey, part of the Under Antarctica expedition supported by UNESCO, wasn’t just about physical endurance. It was a mission to collect crucial scientific data from previously understudied areas of the Antarctic ice sheet, while demonstrating a lighter carbon footprint approach to polar research.
Science, Adventure, and Education: A Three-Pronged Approach
The expedition integrated a vast educational program, reaching over 300,000 young people in 41 countries. This blend of science, adventure, and education aimed to not only understand the changing Antarctic landscape but too inspire action.
The Growing Complexity of Antarctic Ice
Just days after their return, Sevestre and Tordeur reflected on their journey, the data collected, and the impact on those who followed their progress.
Beyond the Feat: Personal Reflections
Heidi Sevestre: “We’re incredibly proud to have completed the expedition safely and on schedule. But beyond the adventure itself, what matters most is that we spent 80 days in one of the planet’s most extreme environments, successfully completing all our missions. These included an ambitious scientific program with a small, lightweight team, and a crucial educational component. We also demonstrated that science can be done using wind power, despite the challenges – equipment failures, and difficult surfaces.”
Matthieu Tordeur: “What strikes me is the power of combining adventure, science, and education. It connects with people who wouldn’t naturally be interested in polar science. We demand to embody science, create it desirable, understandable, and emotional. And I suppose that’s what really worked.”
The Importance of Educational Outreach
M.T.: “We created ‘digital packages’ – educational content with quizzes, photos, videos, and exercises – through the Témoins Polaires association. This allowed young people to follow the expedition from within, understand what a scientific expedition is, and learn about Antarctica.”
H.S.: “The feedback we received was deeply moving. Many young people are grappling with eco-anxiety, a sense of disorientation. They expressed enthusiasm and hope, feeling empowered to take action against climate change and biodiversity loss. That was exactly our goal: to move from knowledge to action, without inducing guilt.”
Data Collection in a Changing Landscape
The expedition focused on collecting data using two radar systems. A surface radar studied the top 40 meters of the ice sheet, crucial for understanding how temperature changes influence snowfall and surface mass balance in East Antarctica. A deep radar penetrated up to two kilometers, mapping the ice thickness and the interface between the ice base and bedrock in West Antarctica, vital for understanding ice flow and sea-level rise contributions.
Navigating the Challenges of the Terrain
H.S.: “The sastrugi – wind-sculpted ice waves – made the surface incredibly challenging. When a sled got stuck, it could cause violent falls, as the kite would pull us into the air. There was no hope of rescue in those areas. We had to make choices, prioritize equipment, and adapt our route constantly.”
M.T.: “There were very impressive moments, especially when the long radar was deployed. It was a real caravan of nearly 100 meters long, with 40-meter antennas on each side. But we managed to collect data, and that’s a huge satisfaction.”
A New Era of Sustainable Polar Research
The Shift Towards Carbon-Neutral Science
H.S.: “There’s a real need to decarbonize science, including polar science. The example of Labos 1.5, which promotes more carbon-neutral science, is very inspiring. We’re not claiming that all expeditions should operate like ours, but we’re showing that alternatives exist. Using on-site resources – wind, sun – opens up possibilities. We were inspired by Ramón Larramendi and his sail-sled expeditions in Antarctica and Greenland.”
Energy Management in Extreme Conditions
M.T.: “Yes, primarily through the midnight sun. It worked very well in East Antarctica, which is mostly cloud-free. As we approached West Antarctica, more maritime conditions and clouds complicated battery recharging. It became a constant obsession. We used a small amount of white gas for our stove, about 30 liters over three months, which is reasonable.”
H.S.: “We considered wind energy, but preferred to work with proven equipment that we fully understood.”
Bridging the Gap Between Data and Action
H.S.: “It will take two to three years to publish the results of our surveys. The data is already being shared with teams in Germany, Britain, and Scotland, for comparison with existing datasets. We traced a line across Antarctica, which is valuable, but it’s part of a long-term collective effort.”
M.T.: “In the meantime, we’ll be giving lectures and meeting with the students who followed us and provided their support. We’re also working on a documentary to share our adventure and discuss the sacrifices scientists make. In a context of budget cuts and geopolitical tensions, restoring confidence in science and reminding people of its importance seems essential.”
Returning to “Normal” Life
M.T.: “It’s quite disorienting, especially coming from Antarctica to South America, where it’s summer, with smells of trees, flowers, and birds. Everything moves so fast, whereas on the ice sheet, every action counts. It takes time to adjust.”
H.S.: “Fresh fruits and vegetables were what we missed most. But being there, you see very clearly what you need to function and what is superfluous. It puts things into perspective.”
A Changed Perspective on Polar Science
H.S.: “Yes. It’s exploratory science, with a lot of uncertainties. We learn a lot, including about logistics, energy, and equipment. Not everything can be tested in advance. But this experience is valuable for the scientific community.”
M.T.: “And then there’s the invisible engine: knowing that 300,000 young people were following us. In difficult moments, it gave us wings. We knew we had to do things right, to the very end.”
H.S.: “The goal is to continue to connect science, exploration, and society. Antarctica is a key continent for understanding our future. If this expedition helped to better understand it – and to inspire action – then it has fully achieved its purpose.”
Frequently Asked Questions
- What was the primary goal of the Under Antarctica expedition? To collect scientific data on the Antarctic ice sheet while demonstrating a low-carbon approach to polar research.
- How did the expedition reach the Antarctic interior? Using kite-skiing, powered solely by the wind.
- What kind of data was collected during the expedition? Data from surface and deep radar systems to study ice thickness, flow, and the bedrock interface.
- How did the expedition engage with the public? Through a comprehensive educational program reaching over 300,000 young people in 41 countries.
Pro Tip: Supporting organizations like UNESCO and Témoins Polaires helps fund vital polar research and educational initiatives.
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