摘要
Methane(CH4)is a very potent greenhouse gas with a globalwarming potential of approximately 80 times that of carbon dioxide(CO_(2))on a decadal scale[1].By November 2024,159 countrieshave signed the Global Methane Pledge,committing to reduceanthropogenic emissions by at least 30%by 2030 relative to the 2020 level(https://www.globalmethanepledge.org).In November2023,the Chinese government released an action plan dedicatedto methane emission control,including specific targets in differentsource sectors(https://www.mee.gov.cn/).However,large discrepancies still exist in China’s current methane inventories,hinderingthe setting of mitigation goals.By now,the national anthropogenicmethane emission estimates still vary by at least 30%,and sectoralemission estimates may differ by a factor of 2–5(Fig.1).To supportChina’s methane emission control plan,a key priority is to determine the emission baselines,which this work aims to address.
基金
supported by the National Natural Science Foundation of China(42275194)
the National Key Research andDevelopment Program of China(2023YFC3707404)
Westlake University for the fruitful discussionof this work.We thank the technical support of the National LargeScientific and Technological Infrastructure‘Earth System Numerical Simulation Facility’(https://cstr.cn/31134.02.EL).
