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Anthropogenic emission is the main contributor to the rise of atmospheric methane during 1993-2017

National Science Review 2022年第5期9卷 154-166页

作者：张臻 Benjamin Poulter Sara Knox Ann Stavert Gavin McNicol etienne fluet-chouinard Aryeh Feinberg 赵园红 Philippe Bousquet Josep G.Canadell Anita Ganesan Gustaf Hugelius George Hurtt Robert B.Jackson Prabir K.Patra Marielle Saunois Lena H?glund-Isaksson 黄春林 Abhishek Chatterjee 李新 Department of Geographical Sciences University of Maryland Biospheric Sciences Laboratory NASA Goddard Space Flight Center Department of Geography University of British Columbia Global Carbon Project CSIRO Oceans and Atmosphere Department of Earth and Environmental Sciences University of Illinois Chicago Department of Earth System Science Stanford University Institute for Data Systems and Society Massachusetts Institute of Technology College of Oceanic and Atmospheric Sciences Ocean University of China Laboratoire des Sciences du Climat et de l’Environment LSCE-IPSL (CEA-CNRS-UVSQ)Université Paris-Saclay School of Geographical Sciences University of Bristol Department of Physical Geography and Bolin Centre for Climate Research Stockholm University Woods Institute for the Environment and Precourt Institute for Energy Stanford University Research Institute for Global Change JAMSTEC International Institute for Applied Systems Analysis (IIASA) Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Global Modeling and Assimilation Office NASA Goddard Space Flight Center Universities Space Research Association Institute of Tibetan Plateau Research Chinese Academy of Sciences

Atmospheric methane(CH4) concentrations have shown a puzzling resumption in growth since 2007 following a period of stabilization from 2000 to *** hypotheses have been proposed to explain the temporal variations in CH4growth,and attribute the rise of atmospheric CH4either to increases in emissions from fossil fuel activities,agriculture and natural wetlands,or to a decrease in the atmospheric chemical ***,we use a comprehensive ensemble of CH4source estimates and isotopic δ13C-CH4source signature data to show that the resumption of CH4growth is most likely due to increased anthropogenic *** emission scenarios that have the fewest biases with respect to isotopic composition suggest that the agriculture,landfill and waste sectors were responsible for 53±13% of the renewed growth over the period 2007-2017 compared to 2000-2006;industrial fossil fuel sources explained an additional 34 ±24%,and wetland sources contributed the least at 13 ±9%.The hypothesis that a large increase in emissions from natural wetlands drove the decrease in atmospheric δ13C-CH4values cannot be reconciled with current process-based wetland *** finding suggests the need for increased wetland measurements to better understand the contemporary and future role of wetlands in the rise of atmospheric methane and climate *** findings highlight the predominant role of anthropogenic activities in driving the growth of atmospheric CH4concentrations.

关键词： greenhouse gas carbon cycle climate mitigation wetland methane isotope

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