量化垃圾场甲烷排放有了精准“卫星尺”

Core Viewpoint - The research team from the Chinese Academy of Sciences has developed a new method using high-resolution satellite remote sensing technology to quantify methane emissions from landfills, which is crucial for addressing climate change [1][2]. Group 1: Research Findings - Landfills are the third-largest anthropogenic source of methane emissions, contributing approximately 18% of total emissions [1]. - The study successfully identified and quantified methane emissions from 102 landfills globally, utilizing advanced satellite technology with a spatial resolution of 30 meters and a spectral resolution of 10 nanometers [1]. - The management practices of landfills significantly affect methane emissions, with open landfills (lacking strict protective measures) exhibiting an average methane emission intensity 4.8 times higher than scientifically managed landfills [1]. Group 2: Implications and Recommendations - The research 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]. - The new method improves monitoring precision and breadth, providing a reliable data foundation for formulating emission reduction policies [2]. - Experts have praised the study for its scientific value and potential applications, indicating it represents a breakthrough in remote sensing technology for solid waste management [2].