Navigating the Changing Sea Ice of Antarctica

On January 2, 2026, the South Korean icebreaker Araon embarked on an expedition to study the Thwaites Glacier in Antarctica. After ten days of navigating open ocean, the vessel entered the sea ice zone surrounding Antarctica at approximately 5 a.m. on January 6. The transformation was striking, as the crew was greeted by an expanse of floating ice, described as brilliant and white, contrasting sharply with the dark ocean they had previously traversed. The sea ice, characterized by rough, polygonal edges and soft, pillowy surfaces, presented a new and challenging environment for the scientists aboard.

New York Times

As the Araon continued its journey, the conditions shifted dramatically. By the afternoon of January 6, the ship faced impenetrable sheets of frozen sea, a challenge that has historically tested polar explorers. Dr. Won Sang Lee, the chief scientist on the expedition, noted the sudden change in conditions, indicating that the crew was now confronting the true difficulties of navigating Antarctic waters. The sea ice, once dynamic and jostling, had transformed into a vast, still expanse, complicating the expedition's objectives.

New York Times

The ocean surrounding Antarctica plays a crucial role in global climate regulation. It is integral to ocean circulation and serves as a significant reservoir for heat and anthropogenic carbon, which helps moderate climate change. However, data collection in this region remains sparse, particularly during the harsh Antarctic winter, when conditions are most hostile. The current expedition aims to gather valuable data that could enhance understanding of these critical processes.

Antarctic Sea Ice

The Araon is staffed by approximately 40 scientists from various countries, including South Korea, Britain, the United States, Australia, Canada, and Taiwan. These researchers are affiliated with institutions such as the British Antarctic Survey and various universities. English serves as the primary language for communication aboard the ship, although other languages are also spoken among the crew.

New York Times

The expedition team has expressed gratitude for the opportunity to conduct research in such a remote and unique environment. The scientists are eager to collect data that will eventually be made publicly available, although there is typically a delay to allow the researchers to utilize the information in their studies first.

New York Times

Despite the excitement surrounding the expedition, there are concerns regarding the impact of climate change on Antarctic sea ice. Critics argue that the rapid changes in sea ice dynamics could have far-reaching consequences for global climate patterns and marine ecosystems. The urgency of this research is underscored by the need to understand these changes and their implications.

Antarctic Sea Ice

• “It’s like we’re about to face the real challenge,” — Dr. Won Sang Lee, Chief Scientist

New York Times

• “Dear Eos: The ocean around Antarctica is critical to ocean circulation, climate, and ecosystems.” — Michael Meredith, British Antarctic Survey

Antarctic Sea Ice

This expedition represents a significant effort to understand the complexities of Antarctic sea ice and its role in the global climate system, amidst the challenges posed by changing environmental conditions.

Antarctic Sea Ice