【中国新闻网】利用卫星遥感“火眼金睛” 中国团队精准量化全球垃圾填埋场甲烷排放

Core Viewpoint - The research team from the Chinese Academy of Sciences has developed a new method using high-resolution satellite remote sensing technology to accurately quantify methane emissions from landfills, addressing the significant role of landfills as a major source of anthropogenic methane emissions, which account for approximately 18% of global emissions [4][5]. Group 1: Research Methodology - The new method utilizes satellite remote sensing with a spatial resolution of 30 meters and a spectral resolution of 10 nanometers, combined with matched filtering algorithms and integrated mass enhancement methods to identify and quantify methane plumes from 102 landfills globally, detecting a total of 367 effective plumes [5][6]. - Traditional methane monitoring methods are limited in coverage, precision, and cost, while satellite technology allows for unified quantification of methane emissions on a global scale [5]. Group 2: Findings and Implications - The study reveals that methane emissions from landfills are significantly influenced by management practices, with open landfills emitting methane at an average intensity 4.8 times higher than sanitary landfills [6]. - The research indicates that existing global atmospheric emission databases, particularly those published by the EU, underestimate emissions from high-emission open landfills by an average factor of five, providing a scientific basis for correcting these discrepancies [6]. - The research team advocates for improved landfill management and the establishment of a global satellite monitoring data-sharing platform to ensure equitable access to critical emission data for resource-limited countries [6]. Group 3: Future Monitoring and Applications - The new method is expected to facilitate large-scale, continuous monitoring of methane emissions from landfills, enhancing the accuracy of gas emission models and establishing a detailed time series database for solid waste methane emissions [7]. - Experts have noted the significant scientific value and application potential of this research, suggesting it represents a breakthrough in remote sensing technology for solid waste management, transitioning from isolated measurements to a comprehensive monitoring system akin to weather forecasting [7].