Slowdown in China's methane emission growth  

作　　者：Min Zhao Xiangjun Tian Yilong Wang Xuhui Wang Philippe Ciais Zhe Jin Hongqin Zhang Tao Wang Jinzhi Ding Silong Piao 

机构地区：[1]State Key Laboratory of Tibetan Plateau Earth System,Resources and Environment(TPESRE),Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China [2]University of Chinese Academy of Sciences,Beijing 101408,China [3]Sino-French Institute for Earth System Science,College of Urban and Environmental Sciences,Peking University,Beijing 100871,China [4]Laboratoire des Sciencesdu Climatet de I'Environnement,LSCE/IPSL,CEA-CNRS-UVSQ,Universite Paris-Saclay,Gif-sur-Yvette 91191,France [5]Institute of Carbon Neutrality,College of Urbanand Environmental Sciences,Peking University,Beijing 100871,China [6]Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China

出　　处：《National Science Review》2024年第8期108-118,共11页国家科学评论（英文版）

基　　金：supported by the Second Tibetan Plateau Scientific Expedition and Research Program of Ministry of Science and Technology of the People's Republic of China(2022QZKK0101);the National Natural Science Foundation of China(41988101,42001104 and 41975140);the Innovation Program for Young Scholars of TPESER(TPESER-QNCX2022ZD-01).

摘　　要：The unprecedented surge in global methane levels has raised global concerns in recent years,casting a spotlight on China as a pivotal emitter.China has taken several actions to curb the methane emissions,but their effects remain unclear.Here,we developed the Global ObservatioN-based system for monitoring Greenhouse GAses for methane(GONGGA-CH_(4))and assimilate GOSAT XCH_(4) observations to assess changes in China's methane emissions.We find the average rate of increase in China's methane emissions(0.1±0.3 Tg CH_(4) yr^(−2))during 2016–2021 slowed down compared to the preceding years(2011–2015)(0.9±0.5 Tg CH_(4) yr^(−2)),in contrast to the concurrent acceleration of global methane emissions.As a result,the contribution of China to global methane emissions dropped significantly.Notably,the slowdown of China's methane emission is mainly attributable to a reduction in biogenic emissions from wetlands and agriculture,associated with the drying trend in South China and the transition from double-season to single-season rice cropping,while fossil fuel emissions are still increasing.Our results suggest that GONGGA-CH_(4) provides the opportunity for independent assessment of China's methane emissions from an atmospheric perspective,providing insights into the implementation of methane-related policies that align with its ambitious climate objectives.

关 键 词：methane emissions greenhouse gases data assimilation China Global Observatio N-based system for monitoring Greenhouse GAses for methane 

分 类 号：TQ221.11[化学工程—有机化工] X51[环境科学与工程—环境工程]