气候变化领域集成服务门户(CCPortal): Attribution of the accelerating increase in atmospheric methane during 2010-2018 by inverse analysis of GOSAT observations

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DOI	10.5194/acp-21-3643-2021
	Attribution of the accelerating increase in atmospheric methane during 2010-2018 by inverse analysis of GOSAT observations
	Zhang Y.; J. Jacob D.; Lu X.; D. Maasakkers J.; R. Scarpelli T.; Sheng J.-X.; Shen L.; Qu Z.; P. Sulprizio M.; Chang J.; Anthony Bloom A.; Ma S.; Worden J.; J. Parker R.; Boesch H.
发表日期	2021
ISSN	1680-7316
起始页码	3643
结束页码	3666
卷号	21 期号:5
英文摘要	We conduct a global inverse analysis of 2010- 2018 GOSAT observations to better understand the factors controlling atmospheric methane and its accelerating increase over the 2010-2018 period. The inversion optimizes anthropogenic methane emissions and their 2010- 2018 trends on a 45 grid, monthly regional wetland emissions, and annual hemispheric concentrations of tropospheric OH (the main sink of methane).We use an analytical solution to the Bayesian optimization problem that provides closedform estimates of error covariances and information content for the solution.We verify our inversion results with independent methane observations from the TCCON and NOAA networks. Our inversion successfully reproduces the interannual variability of the methane growth rate inferred from NOAA background sites. We find that prior estimates of fuel-related emissions reported by individual countries to the United Nations are too high for China (coal) and Russia (oil and gas) and too low for Venezuela (oil and gas) and the US (oil and gas). We show large 2010-2018 increases in anthropogenic methane emissions over South Asia, tropical Africa, and Brazil, coincident with rapidly growing livestock populations in these regions. We do not find a significant trend in anthropogenic emissions over regions with high rates of production or use of fossil methane, including the US, Russia, and Europe. Our results indicate that the peak methane growth rates in 2014-2015 are driven by low OH concentrations (2014) and high fire emissions (2015), while strong emissions from tropical (Amazon and tropical Africa) and boreal (Eurasia) wetlands combined with increasing anthropogenic emissions drive high growth rates in 2016-2018. Our best estimate is that OH did not contribute significantly to the 2010-2018 methane trend other than the 2014 spike, though error correlation with global anthropogenic emissions limits confidence in this result. © This work is distributed under the Creative Commons Attribution 4.0 License.
语种	英语
scopus关键词	anthropogenic source; concentration (composition); emission; GOSAT; inverse analysis; methane; troposphere; Africa; Brazil; China; Russian Federation; United States; Venezuela
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/247076
作者单位	Key Laboratory of Coastal Environment and Resources of Zhejiang Province (KLaCER), School of Engineering, Westlake University, Hangzhou, Zhejiang, China; Institute of Advanced Technology, Westlake Institute for Advanced Study, Hangzhou, Zhejiang, China; School of Engineering and Applied Science, Harvard University, Cambridge, MA, United States; Sron Netherlands Institute for Space Research, Utrecht, Netherlands; Center for Global Change Science, Massachusetts Institute of Technology, Cambridge, MA, United States; Zhejiang University, Hangzhou, Zhejiang, China; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; National Centre for Earth Observation, University of Leicester, Leicester, United Kingdom; Earth Observation Science, School of Physics and Astronomy, University of Leicester, Leicester, United Kingdom
推荐引用方式 GB/T 7714	Zhang Y.,J. Jacob D.,Lu X.,et al. Attribution of the accelerating increase in atmospheric methane during 2010-2018 by inverse analysis of GOSAT observations[J],2021,21(5).
APA	Zhang Y..,J. Jacob D..,Lu X..,D. Maasakkers J..,R. Scarpelli T..,...&Boesch H..(2021).Attribution of the accelerating increase in atmospheric methane during 2010-2018 by inverse analysis of GOSAT observations.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(5).
MLA	Zhang Y.,et al."Attribution of the accelerating increase in atmospheric methane during 2010-2018 by inverse analysis of GOSAT observations".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.5(2021).