【中国青年报】我国科研团队用卫星遥感技术量化全球垃圾填埋场甲烷排放

Core Insights - The research team from the Chinese Academy of Sciences has made significant progress in monitoring methane emissions from landfills using high-resolution satellite remote sensing technology, providing a new method for precise quantification of methane emissions [1][2] - Landfills are identified as the third-largest anthropogenic source of methane emissions globally, accounting for approximately 18% of total anthropogenic methane emissions, highlighting the importance of accurate monitoring [1] - The study utilized satellites with 30-meter spatial resolution and 10-nanometer spectral resolution, identifying and quantifying methane plumes from 102 landfills worldwide, detecting a total of 367 effective plumes [1] Methodology and Findings - The new method combines matched filtering algorithms and integrated mass enhancement techniques to achieve precise quantification of methane emissions, overcoming limitations of traditional ground measurement and model estimation methods [1] - The research indicates that the management practices of landfills significantly affect methane emissions, with open dumps emitting an average intensity of methane that is 4.8 times higher than sanitary landfills [2] - The study calls for the international community to enhance landfill facilities and suggests establishing a global satellite monitoring data-sharing platform to ensure equitable access to critical emission data for resource-limited countries [2]