High-resolution (10 km × 10 km) anthropogenic methane emissions in China in 2020

This dataset is a comprehensive and bottom-up estimate of China's anthropogenic CH4 emissions in 2020 from 45 sub-sectors and ~130,000 point sources. Generally, we classify all sources into two major categories: fossil-fuel system and food system. Fossil-fuel system releases CH4 emissions throughout the fossil-fuel related activities, which contains coal/gas/oil supply chain and fossil-fuel related waste management in this study. Food system contains rice cultivation, livestock, biomass burning and food-related waste management in this study. We allocate the annual CH4 emissions in 2020 at a spatial resolution of 0.1° × 0.1° (nearly 10km ×10km), wherein emissions from point sources are precisely allocated at their location information. The remaining anthropogenic sources in provincial level are allocated by the corresponding surrogate indexes, such as gridded gross domestic product (GDP), population, cultivated area and the source-specific surrogate indexes.本数据集为2020年中国人为甲烷(CH4)排放的自下而上综合估算成果，涵盖45个细分行业和约13万个点源。本研究将所有排放源划分为两大类别：化石燃料系统与食物系统。其中，化石燃料系统包含煤炭、天然气、石油全供应链，以及与化石燃料相关的废物管理环节，其在各类化石燃料相关活动过程中均会产生甲烷排放。食物系统则涵盖水稻种植、畜禽养殖、生物质燃烧以及与食品相关的废物管理环节。本研究以0.1°×0.1°（近似10km×10km）的空间分辨率对2020年年度甲烷排放进行空间化分配，其中点源排放将根据其精确位置信息进行精准落位。剩余省级尺度的人为排放源，则通过对应的替代指标完成空间分配，例如网格化国内生产总值(gross domestic product, GDP)、人口数据、耕地面积以及针对特定排放源的专属替代指标。