Core Points - The 15th Arctic scientific expedition by China successfully utilized the dual-mode AUV for comprehensive observations of the Arctic Ocean's high-latitude seabed and underwater marine environment [2][3] - The dual-mode AUV, capable of underwater cruising and ice-bottom crawling, completed 12 dives and gathered hydrological-ecological data including conductivity, temperature, salinity, dissolved oxygen, chlorophyll, and ice-bottom video [2] - This expedition marks China's largest Arctic scientific investigation, involving four vessels, with the "Snow Dragon 2" successfully conducting seabed environment detection [3] Group 1 - The dual-mode AUV was developed under the national key research and development program during the 14th Five-Year Plan, focusing on the need for three-dimensional observation of Arctic sea ice and underwater marine environments [2] - The dual-mode AUV can operate at speeds of 2 to 3 knots in seawater and can crawl closely along the ice bottom, meeting diverse observational needs across various disciplines [2] - The expedition achieved China's first seabed morphology observation test in the 100% dense ice area of the Arctic Ocean, obtaining high-precision data on ice bottom morphology [2] Group 2 - The chief scientist of the expedition highlighted that the dual-mode AUV provided crucial equipment support for multiple national scientific projects, showcasing excellent underwater observation capabilities [3] - The expedition involved the "Snow Dragon 2," "Polar," "Deep Sea One," and "Explorer Three," marking a significant scale for China's Arctic scientific research [3] - The "Snow Dragon 2" departed from Shanghai on July 6 and returned on September 26, successfully conducting the seabed environment detection [3]

Core Insights - The 15th Arctic Scientific Expedition Team of China successfully utilized the dual-mode AUV for comprehensive observations of the seabed morphology and underwater marine environment in the high-latitude Arctic region [1][2] Group 1: Technology and Equipment - The dual-mode AUV is a submersible robot capable of both underwater cruising and crawling along the ice bottom, developed under the national key R&D program during the 14th Five-Year Plan [1] - During the expedition, the dual-mode AUV completed 12 dives and conducted various tests, collecting hydrological and ecological data including conductivity, temperature, salinity, dissolved oxygen, chlorophyll, and ice bottom video [1] Group 2: Scientific Contributions - The dual-mode AUV provided significant equipment support for multiple national scientific projects, demonstrating excellent underwater observation capabilities and enhancing the practical application level of China's Arctic underwater robot equipment [2] - This expedition, involving the vessels "Xuelong 2," "Jidi," "Shenhai Yihao," and "Tansuo Sanhao," is noted as China's largest Arctic scientific expedition to date, with "Xuelong 2" successfully conducting seabed environment detection [2]