Mon Nov 25 10:09:44 UTC 2024: ## Hidden Antarctic Landscape Discovered, Raising Concerns About Sea Level Rise
**London, UK** – A team of international scientists has uncovered a previously unknown, complex landscape beneath Antarctica’s Dotson Ice Shelf, raising new concerns about the impact of melting ice on global sea levels. Using an unmanned submersible named “Ran,” researchers mapped over 1,000 kilometers of the ice shelf’s underside, revealing a surprising topography of peaks, valleys, plateaus, and unusual teardrop-shaped formations – some described as resembling giant ice cream scoops.
Led by Professor Anna Wahlin of the University of Gothenburg, the team’s 2022 expedition provided the first-ever detailed map of the Dotson Ice Shelf’s underside, revealing an intricate “ice-scape” hidden beneath 350 meters of ice. The discovery is crucial for understanding the dynamics of ice melt in West Antarctica, a region experiencing rapid ice loss and a major contributor to rising sea levels.
“We were surprised – we had to double check it was real,” Professor Wahlin told the BBC, highlighting the unexpected nature of the findings. The data collected shows the ice shelf’s interaction with seawater is far more complex than previously understood. This complexity is key to accurately predicting future melting patterns and their impact on coastal communities globally.
The research comes as world leaders discussed sea level rise at COP29. Scientists are particularly concerned about the Thwaites Glacier, a massive glacier in West Antarctica whose melt could raise global sea levels by as much as 65 centimeters. The accelerating melt rate of Thwaites, which has nearly doubled in the last 30 years, underscores the urgency of understanding the processes driving ice shelf melt.
While ice shelf melt doesn’t directly raise sea levels, it significantly accelerates the flow of glaciers into the ocean. The research also highlights broader ecological consequences. Increased meltwater is altering ocean salinity and disrupting the formation of sea ice, impacting the region’s delicate ecosystem.
Unfortunately, the submersible Ran was lost during a 2024 return expedition. Despite this setback, Professor Wahlin and her team hope to replace the submersible and continue their crucial research to better understand and predict the impacts of Antarctic ice melt on global sea levels and ecosystems.
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