首页|Slowdown in China's methane emission growth

Slowdown in China's methane emission growth

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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-CH4)and assimilate GOSAT XCH4 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 CH4 yr-2)during 2016-2021 slowed down compared to the preceding years(2011-2015)(0.9±0.5 Tg CH4 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-CH4 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.

methane emissionsgreenhouse gasesdata assimilationChinaGlobal ObservatioN-based system for monitoring Greenhouse GAses for methane

Min Zhao、Xiangjun Tian、Yilong Wang、Xuhui Wang、Philippe Ciais、Zhe Jin、Hongqin Zhang、Tao Wang、Jinzhi Ding、Shilong Piao

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State Key Laboratory of Tibetan Plateau Earth System,Resources and Environment (TPESRE),Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China

State Key Laboratory of Tibetan Plateau Earth System,Resources and Environment(TPESRE),Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China

University of Chinese Academy of Sciences,Beijing 101408,China

Sino-French Institute for Earth System Science,College of Urban and Environmental Sciences,Peking University,Beijing 100871(China)

Laboratoire des Sciences du Climat et de I'Environnement,LSCE/IPSL,CEA-CNRS-UVSO,Université Paris-Saclay,Gif-sur-Yvette 91191,France

Institute of Carbon Neutrality,College of Urban and Environmental Sciences,Peking University,Beijing 100871,China

Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China

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Second Tibetan Plateau Scientific Expedition and Research Program of Ministry of Science and Technology of the People's RepuNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaInnovation Program for Young Scholars of TPESER

2022QZKK0101419881014200110441975140TPESER-QNCX2022ZD-01

2024

10.1093/nsr/nwae223

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ISSN：
年,卷(期)：2024.11(8)