气候变化领域集成服务门户(CCPortal): 2010-2015 North American methane emissions, sectoral contributions, and trends: A high-resolution inversion of GOSAT observations of atmospheric methane

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DOI	10.5194/acp-21-4339-2021
	2010-2015 North American methane emissions, sectoral contributions, and trends: A high-resolution inversion of GOSAT observations of atmospheric methane
	Maasakkers J.D.; Jacob D.J.; Sulprizio M.P.; Scarpelli T.R.; Nesser H.; Sheng J.; Zhang Y.; Lu X.; Anthony Bloom A.; Bowman K.W.; Worden J.R.; J. Parker R.
发表日期	2021
ISSN	1680-7316
起始页码	4339
结束页码	4356
卷号	21 期号:6
英文摘要	We use 2010 2015 Greenhouse Gases Observing Satellite (GOSAT) observations of atmospheric methane columns over North America in a high-resolution inversion of methane emissions, including contributions from different sectors and their trends over the period. The inversion involves an analytical solution to the Bayesian optimization problem for a Gaussian mixture model (GMM) of the emission field with up to 0:5-0:625 resolution in concentrated source regions. The analytical solution provides a closedform characterization of the information content from the inversion and facilitates the construction of a large ensemble of solutions exploring the effect of different uncertainties and assumptions in the inverse analysis. Prior estimates for the inversion include a gridded version of the Environmental Protection Agency (EPA) Inventory of US Greenhouse Gas Emissions and Sinks (GHGI) and the WetCHARTs model ensemble for wetlands. Our best estimate for mean 2010 2015 US anthropogenic emissions is 30.6 (range: 29.4 31.3) Tg a-1, slightly higher than the gridded EPA inventory (28.7 (26.4 36.2) Tg a-1). The main discrepancy is for the oil and gas production sectors, where we find higher emissions than the GHGI by 35% and 22 %, respectively. The most recent version of the EPA GHGI revises downward its estimate of emissions from oil production, and we find that these are lower than our estimate by a factor of 2. Our best estimate of US wetland emissions is 10.2 (5.6 11.1) Tg a-1, on the low end of the prior WetCHARTs inventory uncertainty range (14.2 (3.3 32.4) Tg a-1), which calls for better understanding of these emissions. We find an increasing trend in US anthropogenic emissions over 2010 2015 of 0.4%a-1, lower than previous GOSAT-based estimates but opposite to the decrease reported by the EPA GHGI. Most of this increase appears driven by unconventional oil and gas production in the eastern US. We also find that oil and gas production emissions in Mexico are higher than in the nationally reported inventory, though there is evidence for a 2010 2015 decrease in emissions from offshore oil production. © 2021 EDP Sciences. All rights reserved.
语种	英语
scopus关键词	anthropogenic source; emission inventory; gas production; GOSAT; methane; oil production; trend analysis; Mexico [North America]; United States
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/247040
作者单位	School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, United States; Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA 02138, United States; SRON Netherlands Institute for Space Research, Utrecht, Netherlands; Massachusetts Institute of Technology, Cambridge, MA, United States; Environmental Defense Fund, Washington, DC, United States; School of Engineering, Westlake University, Hangzhou, Zhejiang Province, China; Institute of Advanced Technology, Westlake Institute for Advanced Study, Hangzhou, Zhejiang Province, China; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Joint Institute for Regional Earth System Science and Engineering, University of California, Los Angeles, CA, United States; Earth Observation Science, School of Physics and Astronomy, University of Leicester, Leicester, United Kingdom; NERC National Centre for Earth Observation, Leicester, United Kingdom
推荐引用方式 GB/T 7714	Maasakkers J.D.,Jacob D.J.,Sulprizio M.P.,et al. 2010-2015 North American methane emissions, sectoral contributions, and trends: A high-resolution inversion of GOSAT observations of atmospheric methane[J],2021,21(6).
APA	Maasakkers J.D..,Jacob D.J..,Sulprizio M.P..,Scarpelli T.R..,Nesser H..,...&J. Parker R..(2021).2010-2015 North American methane emissions, sectoral contributions, and trends: A high-resolution inversion of GOSAT observations of atmospheric methane.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(6).
MLA	Maasakkers J.D.,et al."2010-2015 North American methane emissions, sectoral contributions, and trends: A high-resolution inversion of GOSAT observations of atmospheric methane".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.6(2021).