China's independently developed icebreaker research vessel, Jidi, has initiated a comprehensive sea ice survey in the Liaodong Bay of the Bohai Sea in the country's northeast to support ice disaster prevention and maritime safety.
Sea ice poses a significant hazard to northern Chinese coastal regions during winter, with the Liaodong Bay of the Bohai Sea being the most severely affected area. On Thursday, the Jidi and its scientific team conducted full-scale data collection and analysis in the core ice zone.
The 2026 Winter Bohai-Yellow Sea Sea Ice Survey Team, composed of researchers from 10 domestic institutions, is employing advanced technologies such as electromagnetic ice-thickness radar, 3D surface scanning, sub-ice acoustic detection, and AI-assisted analysis. The data will be used to ensure navigation safety and protect offshore energy infrastructure, while also providing technical support for ice-resistant engineering designs and improved forecasting systems.
"We are obtaining core data including ice thickness profiles and physical-mechanical parameters. Current satellite and ship observations indicate drift ice coverage in the Liaodong Bay exceeds 10,000 square kilometers," said Li Ge, leader of the survey team.
The Jidi vessel, delivered in June 2024, is capable of breaking ice up to one meter thick and is equipped with comprehensive marine survey instruments. Since entering the Liaodong Bay on Sunday, it has conducted six consecutive days of navigation and research operations.
The survey also includes an ecological assessment of the bay, which serves as the southernmost breeding ground for the protected spotted seal. During winter, the seals rely on sea ice as a breeding and nursing habitat.
"In this survey, we will conduct drone-based infrared monitoring and collect samples including eDNA from the water to thoroughly understand the population distribution of spotted seals and their prey species, as well as the ecological condition of the breeding area," said Pan Yulong, leader of the survey team's ecology group. The Jidi will continue its multidisciplinary survey in the coming weeks, collecting vital data to enhance China's sea ice research and maritime safety capabilities.
China's icebreaker Jidi begins comprehensive sea ice survey in Liaodong bay
