Subnational Methane Monitor

Methane, a greenhouse gas 80 times more potent than CO2 in the near term, drives nearly one-third of current warming. Yet it remains under-addressed in many climate strategies. To stay on track for 1.5 °C, we must slash methane emissions quickly, especially from energy, agriculture, and waste. While national pledges set the stage, subnational governments and local stakeholders implement the day-to-day policies and projects that move the needle. Cities, states, provinces, and regions are in the position to experiment with tailored regulations and pilot initiatives. However, there is currently a lack of integrated tracking of subnational emissions and actions, which hinders transparency and the exchange of successes and lessons learned. To fill a critical information gap, the California-China Climate Institute (CCCI) proudly launches the Subnational Methane Monitor—the first centralized, global platform tracking: Policies: Local regulations, targets, and binding standards across sectors Projects: Pilot and scaled-up efforts in waste management, dairy digesters, pipeline leak detection, and more Emissions: Time-series data and trend visualizations at subnational resolution The current version includes subnationals in the United States and China. By aggregating data on regulations, evaluating policy ambition, mapping pilot projects, and visualizing emission trends, this platform empowers jurisdictions to identify gaps, benchmark progress, and share best practices. Bridging the gap between local action and global climate goals, the Subnational Methane Monitor turns data into actionable insights, accelerating collaboration to curb this super-pollutant.甲烷（Methane）是一种短期增温潜势为二氧化碳（CO₂）80倍的温室气体，当前全球近三分之一的气候变暖由其驱动。然而诸多气候战略中对甲烷的应对仍显不足。若要恪守1.5℃温控目标路径，必须快速削减甲烷排放，尤其是能源、农业与废弃物处理领域的排放。 尽管国家层面的气候承诺奠定了行动基础，但次国家级（subnational）政府与本地利益相关方才是落实日常政策与项目、切实推动减排实效的核心主体。城市、州、省及各类地区可因地制宜制定针对性监管规则与试点举措。然而当前缺乏对次国家级排放与行动的整合式追踪机制，这既阻碍了信息透明度提升，也制约了成功经验与实践教训的交流共享。 为填补这一关键信息空白，美中气候研究所（California-China Climate Institute, CCCI）正式推出次国家级甲烷监测平台（Subnational Methane Monitor）——这是首个全球性集中式追踪平台，可监测以下三类内容： - 政策：各领域的地方监管规定、减排目标与强制性标准 - 项目：废弃物处理、奶牛场厌氧消化设施、管道泄漏检测等领域的试点与规模化行动 - 排放：次国家级分辨率的时序数据与趋势可视化成果 当前版本涵盖美国与中国的次国家级行政单元。该平台通过整合监管数据、评估政策减排力度、绘制试点项目分布图以及可视化排放趋势，助力各辖区找准治理短板、对标进展情况并共享最佳实践。次国家级甲烷监测平台打通了地方行动与全球气候目标之间的信息壁垒，将原始数据转化为可落地的决策洞察，加速全球协作以遏制这一超级污染物。