气候变化领域集成服务门户(CCPortal): Anthropogenic emission is the main contributor to the rise of atmospheric methane during 1993-2017

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DOI	10.1093/nsr/nwab200
	Anthropogenic emission is the main contributor to the rise of atmospheric methane during 1993-2017
	Zhang, Zhen; Poulter, Benjamin; Knox, Sara; Stavert, Ann; McNicol, Gavin; Fluet-Chouinard, Etienne; Feinberg, Aryeh; Zhao, Yuanhong; Bousquet, Philippe; Canadell, Josep G.; Ganesan, Anita; Hugelius, Gustaf; Hurtt, George; Jackson, Robert B.; Patra, Prabir K.; Saunois, Marielle; Hoeglund-Isaksson, Lena; Huang, Chunlin; Chatterjee, Abhishek; Li, Xin
通讯作者	Zhang, Z (通讯作者)
发表日期	2022
ISSN	2095-5138
EISSN	2053-714X
卷号	9 期号:5
英文摘要	Nature or humans? Scenarios for constraining why atmospheric methane continues to rise point to agriculture and fossil fuels. Atmospheric methane (CH4) concentrations have shown a puzzling resumption in growth since 2007 following a period of stabilization from 2000 to 2006. Multiple hypotheses have been proposed to explain the temporal variations in CH4 growth, and attribute the rise of atmospheric CH4 either to increases in emissions from fossil fuel activities, agriculture and natural wetlands, or to a decrease in the atmospheric chemical sink. Here, we use a comprehensive ensemble of CH4 source estimates and isotopic delta C-13-CH4 source signature data to show that the resumption of CH4 growth is most likely due to increased anthropogenic emissions. Our 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 delta C-13-CH4 values cannot be reconciled with current process-based wetland CH4 models. This 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 feedback. Our findings highlight the predominant role of anthropogenic activities in driving the growth of atmospheric CH4 concentrations.
关键词	ISOTOPIC SOURCE SIGNATURES FOSSIL-FUEL CH4 EMISSIONS BUDGET MODEL VARIABILITY INCREASE GROWTH PREINDUSTRIAL CONSTRAINTS
英文关键词	greenhouse gas; carbon cycle; climate mitigation; wetland; methane isotope
语种	英语
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
WOS记录号	WOS:000763990300001
来源期刊	NATIONAL SCIENCE REVIEW
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260784
推荐引用方式 GB/T 7714	Zhang, Zhen,Poulter, Benjamin,Knox, Sara,et al. Anthropogenic emission is the main contributor to the rise of atmospheric methane during 1993-2017[J]. 中国科学院青藏高原研究所,2022,9(5).
APA	Zhang, Zhen.,Poulter, Benjamin.,Knox, Sara.,Stavert, Ann.,McNicol, Gavin.,...&Li, Xin.(2022).Anthropogenic emission is the main contributor to the rise of atmospheric methane during 1993-2017.NATIONAL SCIENCE REVIEW,9(5).
MLA	Zhang, Zhen,et al."Anthropogenic emission is the main contributor to the rise of atmospheric methane during 1993-2017".NATIONAL SCIENCE REVIEW 9.5(2022).