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DOI	10.1016/j.accre.2018.12.003
	Contributions of natural systems and human activity to greenhouse gas emissions
	YUE X.-L.; GAO Q.-X.
发表日期	2018
ISSN	1674-9300
卷号	9 期号:4
英文摘要	In this study, we conducted a literature review of relevant research and then statistically analyzed global greenhouse gas (GHG) emissions from natural systems, including forest fires, oceans, wetlands, permafrost, mud volcanoes, volcanoes, and earthquakes. Drawing on the Global Carbon Project (GCP) report, we also summarized the global anthropogenic GHG emissions. We then compared the global annual GHG emissions from natural systems with those generated by human activity. The results indicate that the global annual GHG emissions range approximately between 54.33 and 75.50 Gt CO2-eq, of which natural emissions account for 18.13–39.30 Gt CO2-eq, with the most likely value being approximately 29.07 Gt CO2-eq. According to the GCP report, the global anthropogenic emissions have increased from 22 Gt CO2-eq in 1990 to 36.2 Gt CO2-eq in 2016. The amounts of natural and anthropogenic GHGs emissions are roughly of the same order of magnitude. Anthropogenic emissions account for approximately 55.46% of the total global GHGs emissions (2016 value), i.e., the ratio of natural to anthropogenic emissions is approximately 0.8. In addition, the annual amount of GHGs absorbed by Earth systems (ocean and terrestrial ecosystems) ranges between approximately 14.4 Gt CO2-eq and 26.5 Gt CO2-eq, with natural system GHG emissions and sinks also having roughly the same order of magnitude. This finding indicates that the GHG emissions generated by human activity exert extra pressure on what is otherwise a self-balancing Earth system. © 2018 National Climate Center (China Meteorological Administration)
英文关键词	Anthropogenic emission; Global emission; Greenhouse gases; Natural emission; Natural system
语种	英语
来源期刊	Advances in Climate Change Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/89156
作者单位	China Reinsurance (Group) Corporation, Post-doctoral Workstation, Beijing, 100033, China; Beijing Normal University, Beijing, 100875, China; Chinese Research Academy of Environmental Sciences, Beijing, 100012, China
推荐引用方式 GB/T 7714	YUE X.-L.,GAO Q.-X.. Contributions of natural systems and human activity to greenhouse gas emissions[J],2018,9(4).
APA	YUE X.-L.,&GAO Q.-X..(2018).Contributions of natural systems and human activity to greenhouse gas emissions.Advances in Climate Change Research,9(4).
MLA	YUE X.-L.,et al."Contributions of natural systems and human activity to greenhouse gas emissions".Advances in Climate Change Research 9.4(2018).