10年，他“数”遍神州树

Core Insights - The article discusses the groundbreaking work of a research team led by Guo Qinghua at Peking University, which has developed China's first "Tree Density Map" that estimates the number of trees in the country, revealing approximately 142.6 billion trees as of 2020 [4][5][6] Group 1: Tree Density Map - The "Tree Density Map" shows a tree density of about 689 trees per hectare, with an average of 100 trees per person in China [4] - The map indicates that the southwestern region has the highest number of trees, approximately 36 billion, while the Yangtze River basin leads with about 49.6 billion trees [5][6] Group 2: Research Methodology - The research team utilized drones equipped with LiDAR sensors to scan forests, employing AI algorithms to analyze data and satellite remote sensing to create a comprehensive forest panorama [6][10] - Over a decade, the team collected data from over 70,000 sample plots, resulting in more than 400 terabytes of data, equivalent to over 80 million photos [6][7] Group 3: Technological Advancements - The team has developed an integrated remote sensing platform that includes various LiDAR systems, enabling high-precision data collection even in challenging terrains [10] - The use of LiDAR technology allows for detailed three-dimensional measurements of trees, overcoming limitations of traditional manual measurement methods [9][10] Group 4: Future Research and Conservation - The ongoing research aims to understand the optimal types and quantities of trees to plant in different regions, aligning with China's "dual carbon" goals [8] - The team has also discovered exceptionally tall trees, including a 102.3-meter high Tibetan cypress, emphasizing the importance of continued exploration and conservation efforts [12][13]