无人机“厘米级”观测南极着地冰崖崩解过程

Core Insights - A research team from Sun Yat-sen University and the Chinese Arctic and Antarctic Administration has developed a novel method for centimeter-level monitoring of the calving process of "grounded ice cliffs" in Antarctica, providing new observational tools and data support for assessing ice mass loss in the context of global climate change [1][2] Group 1: Research Methodology - The team proposed a multi-temporal drone imaging coordination and three-dimensional change detection method, enabling precise monitoring of the calving process [1] - Traditional satellite remote sensing methods have limitations in monitoring the calving process due to the small scale, high frequency, and irregularity of "grounded ice cliff" calving events [1] Group 2: Data Collection and Findings - During China's 38th Antarctic expedition, the team conducted 10 drone photogrammetry flights over 26 days, achieving a spatial resolution of 2.1 centimeters [2] - The research identified 44 calving events along a 0.89-kilometer coastline, with a total calving volume of 4,506.69 cubic meters, equating to a total mass loss of 3,078.45 tons [2] - The estimated average calving rate for the "grounded ice cliffs" in the region is 262.93 tons per kilometer per day [2]